US3524008A - Reed-type musical instrument with electromagnetic pickups - Google Patents

Reed-type musical instrument with electromagnetic pickups Download PDF

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Publication number
US3524008A
US3524008A US752227A US3524008DA US3524008A US 3524008 A US3524008 A US 3524008A US 752227 A US752227 A US 752227A US 3524008D A US3524008D A US 3524008DA US 3524008 A US3524008 A US 3524008A
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Prior art keywords
vibratory
bar
reed
assembly
elastic
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US752227A
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English (en)
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Karl Scherer
Ernst Zacharias
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Matth Hohner AG
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Hohner Ag Matth
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H3/00—Instruments in which the tones are generated by electromechanical means
    • G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
    • G10H3/14—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means
    • G10H3/20—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means using a tuning fork, rod or tube

Definitions

  • the instrument includes a vibratory means which is g adapted to be set into mechanical vibratory motion and an electrical pick-up. means coacts with the vibratory means to convert the mechanical vibrations thereof into electrical waves.
  • An elongated bar means which has a mass substantially greater than that of the vibratory means carries the latter, and the instrument further includes a support means which is stationary and has a mass at least as great as that ofv the vibratory assembly which is .formed by .the elongated barmeans and vibratory means carried .thereby.
  • This latter vibratory assembly will vibrate about a given nodal point, and an elasticmeans which is situated substantially at this nodal point inte rconne cts the vibratory assembly with the support ,means so that the latter will carry, the vibratory assembly in amanner permitting the entire assembly to vibrate about the nodal point due to the elastic connecting means. In this way even if the vibratory means is set into vibration as a result of impact derived from a hammer type of action, proper sounds will beproduced.
  • the present invention relates to electrical musical in struments.
  • the present invention relates to electro-mechanical vibration generators for musical instruments of' the electronic type where a vibrator in the form of a rod, reed, or the like, is carried .by a suitable carrier.
  • This carrier has a relatively large mass as compared to that of the vibratory element, and the carrier is itself supported by a supporting structure.
  • a pick-up coacts with the vibratory element so as to convert the mechanical vibrations into electrical vibrations or waves.
  • this tone will not be accompanied by the disturbing undesirable impulse or noise which is unavoidably transmitted to the pick-up with conventional structures.
  • the vibratory means with which a pick-up means coacts to convert the mechanical vibrations thereof into electrical waves is itself carried by an elongated bar means which has a mass substantially greater than the mass of the vibratory means.
  • a support means is provided to carry a vibratory assembly which is formed by the bar means and vibratory means, this latter assembly vibrating about a predetermined nodal point.
  • This support means which has a mass at least as great as the mass of the vibratory assembly is connected to the latter through an elastic means which while providing for support of the vibratory assembly on the support means nevertheless permits the entire vibratory assembly to vibrate freely with respect to the support means about the nodal point.
  • the elongated bar means will extend at both ends beyond the vibratory reed or the like, and the results of the invention are still achieved when that end of the bar means which extends freely beyond the vibratory end of the reed is shortened up to one-third of its length and where this mass which is thus eliminated from the longitudinal portion of the bar means is replaced instead by a metal block situated at the free end of the shortened bar means.
  • a metal block must have approximately twice the mass of the part of the bar means which has been removed.
  • the structure of the invention can be utilized without difficulty in regions such as in the bass tonal region of the instrument without requiring an undesirably large amount of space for the vibration generating structure.
  • the same relationships can be achieved in the case where the elongated bar means, without being shortened, instead is angularly arranged in the vibratory plane of the vibratroy assembly.
  • the elastic means which interconnects the bar means of the vibratory assembly with the support means.
  • This elastic means can take the form of a pad or layer of rubber or material having properties similar to rubber, or a different type of spring arrangement can be provided. It is particularly suitable when using a layer of rubber-like material to vulcanize or otherwise adhere this layer at its opposed surfaces on the one hand to the bar means and on the other hand to the support means.
  • a plate which is fixed in this way to one face of the elastic layer can be connected through a suitable threaded fastener with the support means.
  • the simplest form of elastic connecting means as a spring is a construction where a metallic leaf spring is used, such as a curved leaf spring which has a pair of opposed ends connected to the bar means and which has an intermediate portion connected to the support means.
  • a metallic leaf spring such as a curved leaf spring which has a pair of opposed ends connected to the bar means and which has an intermediate portion connected to the support means.
  • a pair of curved leaf springs connected to each other at their ends and respectively having their intermediate portions connected respectively to the bar means and the support means.
  • a simple one-piece spring ring such as an endless circular spring cut from a thin-walled tube of bronze, for example, such a ring being connected at a pair of diametrically opposed portions with the bar means and support means, respectively.
  • the bar means and support means be insulated from each other sufliciently with respect to the vibratory movement of the vibratory assembly, particularly in its vibratory plane, while at the same time a secure connection is achieved between the support means and the vibratory assembly. It may also be desirable to limit or eliminate the vibratory insulation under certain conditions as where the musical instrument is to be played in a special way or where the instrument is to be transported, by situating between the elongated bar means and the support means, or between the housing of the instrument and the bar means an additional more or less elastic structure, such as a suitable spring, rubber pad, or the like, which will be situated at a location preventing relative movement between the bar means and support means.
  • the vibratory means may take the form of an elongated vibratory reed connected at one end portion and at one side to the elongated bar means which extends parallel to the reed.
  • the vibratory means is made up of a plurality of such reeds, then these reeds can be situated where they have the same or different tones in a spaced parallel relationship where they are located beside or over each other. Where the several reeds are to provide different tones and are to be actuated by different keys, it is possible to provide an exceedingly inexpensive construction with the present invention.
  • the selection of the different vibratory elements of different tones on a single carrier structure should however be carried out in such a way that the tones are sufficiently different from each other to prevent an undesirable opposed coupling of the tones with respect to their frequency.
  • a plurality of such vibratory elements on a single carrier such as a suitable bar means it is possible to provide with the invention an exceedingly small number of vibratory assemblies which in fact are fewer than the number of keys of the instrument. If, however, there is for each key a vibratory assembly according to the invention each having different vibratory elements for different tones, then it is possible with this structure of the invention to achieve a musical instrument which presents musical possibilities incapable of being achieved heretofore.
  • the structure of the invention is designed, however, in such a way that the keys of the instrument and the hammer-actions actuated thereby and vibratory assemblies responding to the actions are distributed according to a conventional musical scale of tones, the several elongated bar means and vibratory means carried thereby are situated beside each other and carried by a common support means which extends primarily in a direction parallel to the keyboard with a group of the vibratory assemblies being carried by the common support means and fixed thereto by the elastic means of the invention.
  • the structure of the musical instrument is rendered exceedingly simple and uncrowded with the possibility of combining with the hammer action damping means to engage the free ends of the vibratory elements to provide effects which are conventionally achieved by the pedal action of a piano.
  • the electro-mechanical vibration generator of the invention whose advantages are particularly apparent in connection with a hammer-action, is nevertheless also capable of being used with a plucking type of action. Even with this latter type of action it is essential or at least desirable to avoid as much as possible impulses which accompany the excitation of the vibration but detract from the quality of the sound which can be achieved. With the present invention it is possible to eliminate such undesirable accompanying impulses to a very great degree so as to achieve a very high quality of sound.
  • FIG. 1 is a fragmentary partly sectional perspective illustration of a musical instrument which includes features of the present invention
  • FIG. 2 is a transverse sectional elevation of another embodiment of a musical instrument according to the invention.
  • FIG. 3 is a fragmentary schematic illustration of another type of elastic means for interconnecting a bar means and support means
  • FIG. 4a is a fragmentary longitudinal sectional elevation showing still another form of elastic means for interconnecting a support means and bar means;
  • FIG. 4b shows in a fragmentary section part of the structure of FIG. 4a in a plane taken transversely through the plane of FIG. 4a.
  • FIG. 1 there is shown therein a base plate 1 0f the instrument, the lower right portion of the base plate 1 of FIG. 1 being directed toward the player of the instrument and carrying a profiled sheet metal supporting structure the left and right ends 2 and 3, respectively, of which are visible in FIG. 1 and fixed to the base plate :1 by way of the screws 4.
  • This profiled sheet structure 2, 3 has a rear upstanding wall 5 provided with upwardly directed smaller projections 6 which are relatively narrow and which extend to an elevation substantially higher than the elevation of substantially wider projections 7 situated respectively between and alternating with the projections 6 and defining with the latter upwardly directed notches 8.
  • the sheet structures 2, 3 has at its front edge known pads a on projections 9a which serve to guide the keys 9, 10 of the instrument. These keys have extensions 11,
  • FIG. 1 At the rear end of the base plate 1 which is directed away from the player of the .instrument there is an elongated mounting board 17 which extends throughout the entire length'of the keyboard and on which mounting brackets 18, 19 are situated, these brackets including a plurality 'of upwardly directed bearing walls 20a20d and 21a-21d. These elements are arranged in a manner shown in FIG. 1
  • the cams 23 respectively have suitably profiled camming surfaces which respectively carry the hammer shafts 26 at one end of the latter, these shafts 26 respectively carrying distant from the cams 23 the hammers 29 which are provided with the weights 27 and covered with felt liners 28. At the other ends of the camming surfaces, the cams 223 carry, in threaded bores 30, adjustable stops 31.
  • the illustrated vibratory means 34 shown at the left of FIG. 1 is in the form of a reed loaded at its freely vibrating end by way of a head member 36 and held at its opposed end 35 by a spacer 37 in the form of a sleeve through which a screw extends for fixing the rear end of the vibratory means 34 to the elongated bar means 38 to which this latter screw is connected.
  • the elongated bar means 38and the vibratory means 34 extend parallel to and are spaced from aech other with a suitable spring washer or the like interposed in a known way at the connection between the reed 34 and bar 38.
  • This elongated bar means 38 which thus carries the vibratory means 34 and forms a vibratory assembly therewith, is in turn connected through an elastic means with a support means 41-43.
  • the elastic means takes the form of an elastic layer 40 of rubber or a material having elastic properties similar to rubber, this layer 40* being glued or vulcanized directly to the surface of the bar 38 which is directed away from the reed 34.
  • the opposed surface of the layer 40* is glued or vulcanized to the plate 41 which together with the plate 40 forms the assembly 39.
  • a screw 42 forms a threaded fastener for interconnecting the plate 41 with the angle bar 43 of the support means, and the screw 42 carries a suitable nut and washer assembly by means of which the plate 41 is fixed to the angle member 43.
  • the mass of the support means 41-43 is at least as great as the mass of the vibratory assembly '34, 38, and the mass of the bar means 38 is substantially greater than the mass of the vibratory means 34.
  • the metallic angle member 43 has the screw 42 fixed thereto and incapable of rotating with respect thereto as for example through the use of suitable lock washers, and in this way the vibratory assembly 34, 38 is prevented from rotating about the axis of the screw 42 with respect to the angle member 43.
  • the elongated bar means 38 is situated in the lower, base region of the tonal scale and thus has a relatively large vibratory mass as is conventional with low tones. Because of the required mass for the vibratory assembly at this region of the instrument, it is essential for the elongated bar means 38 to have a substantial length extending from the part of the bar 38 which is situated beneath the angle member 43. However, the requirement of a substantial length of bar 38 extending forwardly beyond the angle member 43 is avoided with the structure of the invention by providing instead of a bar which would have a length as indicated by the dotted line extension of FIG. 1 a shorter bar '38 which carries in place of the eliminated forward portion thereof shown in dotted lines an additional weight 44 of approximately double the mass of the eliminated portion. Inasmuch as the additional weight 44 because of its relatively great height might possibly vibrate about the longitudinal axis of the bar 38, a pad 45 is provided on one side of each additional weight 44.
  • the inductive sound pick-up 46 is situated beside the free vibratory end of the reed 34 and is in the form of a downwardly extending ferromagnetic strip of sheet metal forming a pole shoe surrounded by and carrying a winding 47 and curved or bent so as to extend to the region of the adjoining side edge of the reed 34 in such a way that the distance between the lower edge of the ferromagnetic strip and the side edge of the reed 34 is as small as possible.
  • the ferromagnetic strip is directly fixed to the elongated bar means 38 by way of a connecting plate 48.
  • an inductive pick-up it is also possible to use a capacitive pick-up the metal strip of which can be in the form of a strip of any desired metal and must only be mounted opposite the reed in an insulated manner.
  • the connection of an inductive or capacitive sound pick-up, the means for initially magnetizing or providing the electric potential, and the further electrical connections to an amplifier and loudspeaker are not described and shown since such features are well known.
  • a particular production of sound can be achieved when the sound pick-up is simultaneously both inductive and capacitive and the electric potential of the electrode together with the potential of the winding are mixed in such a way that the mixing ratio is adjustable and the polarization of the potential is reversible.
  • the angle member 43 is in the form of a suitably profiled elongated metal member extending across the rear of the entire structure and connected to the lateral end blocks 56 and 57 by way of screws 58.
  • These lateral end blocks 56 and 57 which are carried by the base plate I serve also to support for rotary movement a shaft 60 of a damping assembly, this shaft 60 carrying the plurality of pins 59.
  • the shaft 60 is connected by the lever 61 with a link 62 which is in turn connected with a lever 63 pivotally carried by a bracket 66 and connected to the top end of a tube 64 whose bottom end is connected to a pedal-actuated mechanism known in the art.
  • the shaft 60 can thus be turned in opposition to a spring 65 which retracts the damping assembly to its rest position.
  • the several pins 59 are respectively connected to the ends of bands 67 of leather or similar material, so that when the shaft 60 is turned in opposition to the spring 65 damping pads 68 together with the springy carrier brackets 69 therefor made of sheet metal are displaced from the free ends of the vibratory reeds.
  • the carrier 69 of each damping pad 68 is connected by screws 70 with an extension 11 of a given key, so that whenever a given key is depressed the individual damping pad 68 which is connected thereto is individually raised from the reed which is to be set into vibration.
  • the above-described structure shown in FIG. 1, including the base plate 1 and the end blocks 56 and 57 can either be introduced as a separate unit into the housing of an electronic musical instrument, or part of the housing thereof may be formed by the components 1, 56, 57.
  • the housing of the instrument it is also advantageous to locate the amplifier and loudspeaker, although the latter arrangement is not essential since it is possible, if desired, to use a special amplifier or a special loudspeaker in certain cases.
  • FIG. 2 there is shown therein the upper part of an electronic musical instrument having the electro-rnechanical vibration generator of the invention, this structure being shown in section in FIG. 2.
  • the housing of this structure includes the keyboard base plate 101, the front cover strip 102, the front housing wall 103, the base plate 104, the rear housing wall 105, the hingecarrying strip 106 which carries the hinge 107, the cover 108 connected to the hinge 107 so as to be swingable, and the front cover plate 109 which is connected to the hinged top Wall 108 to be swingable therewith between a pair of lateral side walls of which only the right side wall 110 is visible in FIG. 2.
  • the keyboard is made up of white keys 111 and black keys 112 which are supported for swinging movement about a shaft 114 in a known way, this shaft being carried by the supporting sheet structure 113, and the extensions 115 of U-shaped section are situated with suitable spacers 116 therebetween on the shaft 114 with a tensioned spring which is not illustrated connected between each extension 115 and the supporting sheet structure 113 to yieldably hold each key in its operating position ready to be depressed by the operator.
  • the profiled sheet metal 113 is carried by a board 117 which is in turn mounted upon the base plate 101 of the keyboard. The ends of the keyboard are closed by side walls of which the right side wall 118 is visible in FIG.
  • each key extension 115 there is a lever 119 which is fixed to the rear end of each extension 115 and which carries at its lower region a damping strip 120 of felt or the like engaged by the sliding cam profile 121 of the hammer cam 122.
  • the lever 119 upon depression of a selected key, the lever 119 will swing about the shaft 114 in a clockwise direction with the camming profile 121 sliding and rolling along the strip 120, while the earn 122 turns about its supporting shaft 123 in a counter-clockwise direction, as viewed in FIG. 2, in opposition to the retracting force of the tension spring 127 which is connected to and extends between a rod 126 carried by a supporting block and a pin 124 carried by the earn 122.
  • the tension spring 127 which is connected to and extends between a rod 126 carried by a supporting block and a pin 124 carried by the earn 122.
  • the end position of the hammer cam is adjusted by way of the adjustable stop structure 131.
  • the hammer includes the hammer shaft 128 fixed to and extending from the cam 121 and carrying the hammer 130 which is covered by the felt strip 129 or the like. As was indicated above such actions are well known in the art.
  • the supporting block 125 is carried with other unillustrated supporting blocks on a bearing plate 132 which is fixed to the base plate 104 of the housing.
  • the vibratory assembly of the invention which is shown in FIG. 2 also includes an elongated vibratory reed 134 having a head 133 at its free vibratory end while at its lower end it is connected by a spacer asembly 135 with the elongated bar means 137, the spacer assembly including the threaded fastener 136 which is threaded into a suitable bore of the bar 137 for mounting the reed 134 thereon.
  • This bar 137 carries at its top end the additional weight 138 which functions in the same way as the additional weight 44 of FIG. 1.
  • the additional weight 138a illustrated in dotted lines in FIG. 2 is part of a vibratory assembly which achieves lower tones than the assembly shown in FIG. 2 so that a larger vibratory mass is provided.
  • the vibratory mass of the elongated bar means is greater than the mass of the vibratory means 134.
  • the bar means will have smaller additional weights or will have no additional weights while at the uppermost tones the bars will become gradually of a shorter length, as shown by the dotted line 139.
  • the angle member 140 which forms the support means for this embodiment is carried by spacer blocks on the base plate 104, and only the right spacer block 141 is visible in FIG. 2.
  • the elastic means of the invention which interconnects the vibratoryassembly 134, 137 with the support means 140 takes the form of a leaf spring structure which is situated between the bar 137 and the upstanding wall 142 of the angle member 140.
  • the elastic means is formed from a pair of leaf springs 144 and 145 which are curved in the man- .ner illustrated in FIG. 2 and joined at their outer free ends to form a spring support similar to that which is used to support wagons.
  • a threaded fastener 146 serves to connect the leaf spring 144 at an intermediate portion thereof to the bar 137 while a threaded fastener 147 serves to connectthe leaf spring 145 at an intermediate portion thereof to the wall 142.
  • Suitable lock washers can be combined with these fasteners to prevent turning thereof and to maintain the structure in assembled condition.
  • the bar 137 also serves to carry the inductive sound pick-up 148 which has the pole shoe of fiat profilecarrying the winding.
  • the top vibratory end of the reed 134 is engaged by'the damping pad 150 glued or otherwise fastened to the springy metal band or feeler 149 which is fixedly carried by the upper end of the lever 119. Therefore, when a key is depressed the damping pad 150 will be raised away from the vibratory reed 134 simultaneously with the actuation of the hammer action to impart vibratory movement to the reed 134 by impact therewith.
  • the pedal mechanism which is not illustrated in detail in FIG. 2 serves when actuated to rotate a shaft 151 which has a plurality of pins 152 fixed thereto, and these pins are connected by pull elements indicated in a dot-dash line in FIG. 2, with the springy pad supports 149 so as to raise the latter and maintain the damping pads 150 out of engagement with the reeds when the pedal is actuated.
  • FIG. 1 because of the larger number of details which are included in FIG. 1. It is possible to see from FIG. 2
  • a vibratory motion is created where the amplitude of the vibrations of the reed 134 and the bar 137 are substantially difierent because of the mass relationship therebetween and also the vibrations are carried out in phase opposition.
  • This relationship between the reed 134 and the bar 137 of substantially larger mass corresponds fully to the known methods for coupling mechanical or electrical vibratory structures.
  • the pair of components, which is to say the reed 134 and the bar 137 thus form a vibratory assembly where the elements 132 and 137 are simultaneously deflected in opposed directions so that there will be located between these components, below the spacer 135, the nodal point about which the vibratory assembly vibrates.
  • One of the important features of the invention resides in connecting the entire vibratory assembly 134-137 at the location of this nodal point by way of the elastic means to the support means, so that as a result practically no energy is dissipated at the connection of the vibratory assembly to the elastic means, resulting in this way in vibrations of low frequency, each taking a relatively large period of time, in a manner which cannot be achieved with other types of rod or reed vibrators.
  • FIG. 2 shows an elongated bar 154 of rectangular cross section, in dotted lines, formed with notches for receiving the top end of the bar 137 and the additional weight 138 connected thereto, this bar 154 being made, for example, of a foam plastic of the type used in modern packages for transporting delicate articles.
  • This element 154 is carried by the cover 108 betweenthe latter and the bars 137 with the added weights 138 thereof to engage the bars 137 and prevent movement thereof during transportation or when the instrument is not used,
  • the elastic means may also be composed of a single simple curved leaf spring 155 connected at an intermediate portion to the support means and at its free ends 156 and 157 to the bar means 137.
  • the center of the leaf spring is connected to the support 140 by way of a threaded fastener which with suitable lock washers or the like is prevented from rotation. In this way the spring 155 is also prevented from turning about the axis of the screw fastener with respect to the support means 140.
  • the simple initially curved leaf spring 155 must, as is clear, in order to achieve an operation which will correspond to that achieved with the pair of springs of the spring means 143, be made of a spring material which is of lesser thickness and/or width.
  • FIG. 4a there is fragmentarily illustrated in section the connection between a group of electromechanical vibratory assemblies of the invention, FIG. 4a being a longitudinal section taken along the support means formed by the metallic angle member 202.
  • FIG 4b shows the structure in a transverse section as compared to FIG. 41:.
  • FIGS. 4a and 4b in particular illustrate another embodiment of the elastic means which interconnects the bar means of the several vibratory assemblies with the support means.
  • the elastic means of this embodiment includes portions respectively connected to the plurality of bar means and portions connected to the support means, these portions being separable from each other so that a releasable connection is provided.
  • Each bar means 201a- 201d simply designated as 201 in FIG.
  • screws 207a207d These screws have threaded portions received in threaded bores of the lower wall of the angle member 202, with suitable washers and the like being provided to prevent rotary movement of the screws once they are in their final positions.
  • the several screws 207a1207d respectively extend through spacer sleeves 208a-208d, these sleeves providing a precisely predetermined pressure for the rubber intermediate layers.
  • the spacer sleeves 208a- 208d which are made of metal are respectively surrounded by rubber sleeves 209a209d which, for the purpose of increasing the extent of insulation of the vibrations, are provided with inner diameters greater than the outer diameters ofthe spacer sleeves 208a-208d.
  • the assembly of FIGS. 40: and 4b forming the elastic means of this embodiment will also function to prevent lateral swinging of the plurality of elongated bar means toward or away from each other in the event that the connection is provided, as shown in FIGS. 4a and 4b, only through a single screw.
  • vibratory means in a musical instrument, vibratory means, pick-up means coacting with said vibratory means for converting mechanical vibrations thereof into electrical waves, elongated bar means carrying said vibratory means and forming therewith a vibratory assembly which vibrates about a given nodal point, said bar means having a mass which is substantially greater than said vibratory means, support means having a mass at least as great as that of said vibratory assembly, and elatic means connecting said vibratory assembly approximaetly at said nodaLpoint thereof to said support means to be supported thereby.
  • said elastic means includes a layer of an elastic material having properties similar to that of rubber, said layer adhering at one face to said bar means and at an opposed face to said support means.
  • said elastic means includes portions respectively connected with said support means and said bar means and said portions being removably connected to each other, so that said bar means can be disconnected from said support means with one portion of said elastic means remaining connected to said bar means and the other portion thereof remaining connected to said supporting means.
  • said sup port means includes a plate fixedly adhered to said layer, said support means including a substantially stationary rigid member, and a threaded fastener fixing said plate to said substantially rigid member.
  • said elastic means being in the form of an elongated leaf spring which has a pair of opposed ends connected to one of said pair of means and which has an intermediate portion connected to the other of said pair of means,
  • leaf spring includes a pair of curved leaf spring members joined to each other at free opposed ends thereof and respectively having intermediate portions connected respectively to said support means and said bar means.
  • a keyactuated action means includes a hammer assembly for setting said vibratory means into vibratory movement by impact of said hammer assembly with said vibratory means.
  • said vibratory means is in the form of an elongated vibratory reed
  • said elongated bar means being in the form of an elongated substantially rigid bar which is longer than and spaced from and parallel to said reed, situated at one side thereof and extending beyond opposed ends thereof, and a spacer fixed to said bar and to said reed at the region of oneend thereof so that said reed can vibrate at an end thereof distant from said spacer.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Vibration Prevention Devices (AREA)
US752227A 1967-10-16 1968-08-13 Reed-type musical instrument with electromagnetic pickups Expired - Lifetime US3524008A (en)

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US (1) US3524008A (de)
AT (1) AT304235B (de)
BR (1) BR6898551D0 (de)
DE (1) DE1547583A1 (de)
FR (1) FR1592567A (de)
GB (1) GB1175038A (de)
NL (1) NL6807983A (de)
SE (1) SE355886B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110100200A1 (en) * 2009-11-04 2011-05-05 Adam Eugene Mayes Polyphonic guitar pickup

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CN111951765B (zh) * 2020-08-19 2025-04-22 苏州礼乐乐器股份有限公司 带环形整体式音梁的扬琴

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US2254840A (en) * 1939-09-30 1941-09-02 Rca Corp Electric musical instrument
US2881651A (en) * 1954-06-07 1959-04-14 Wurlitzer Co Electronic piano
US2942512A (en) * 1957-08-14 1960-06-28 Wurlitzer Co Electronic piano
US2998741A (en) * 1956-10-29 1961-09-05 Wurlitzer Co Electronic piano

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2254840A (en) * 1939-09-30 1941-09-02 Rca Corp Electric musical instrument
US2881651A (en) * 1954-06-07 1959-04-14 Wurlitzer Co Electronic piano
US2998741A (en) * 1956-10-29 1961-09-05 Wurlitzer Co Electronic piano
US2942512A (en) * 1957-08-14 1960-06-28 Wurlitzer Co Electronic piano

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110100200A1 (en) * 2009-11-04 2011-05-05 Adam Eugene Mayes Polyphonic guitar pickup
US8344236B2 (en) * 2009-11-04 2013-01-01 Adam Eugene Mayes Polyphonic guitar pickup

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FR1592567A (de) 1970-05-19
DE1547583A1 (de) 1969-10-30
SE355886B (de) 1973-05-07
AT304235B (de) 1972-12-27
GB1175038A (en) 1969-12-23
BR6898551D0 (pt) 1973-01-18
NL6807983A (de) 1969-04-18

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