US2058399A - Electromagnetic talking machine - Google Patents

Electromagnetic talking machine Download PDF

Info

Publication number
US2058399A
US2058399A US25354A US2535435A US2058399A US 2058399 A US2058399 A US 2058399A US 25354 A US25354 A US 25354A US 2535435 A US2535435 A US 2535435A US 2058399 A US2058399 A US 2058399A
Authority
US
United States
Prior art keywords
electromagnetic
cores
talking
parts
talking machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US25354A
Other languages
English (en)
Inventor
Begun Semi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of US2058399A publication Critical patent/US2058399A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following

Definitions

  • the invention relates to electromagnetic sound recording and reproducing machines and more particularly to the so-called talking heads thereof in which electromagnets are arranged-to coact with a steel wire or tape as a sound record- I ing and reproducing means.
  • the invention is concerned with a construction that shall enable this distance to be varied.
  • FIG. 1 is an elevationof the talking head partly in section
  • Fig. 2 an elevation thereof as viewed from the side opposite to that represented in Fig. 1
  • Fig. 3 is a partially sectioned end elevation
  • the section being on the line A-B of Fig. 2
  • Fig. 4 is a similar view to Fig. 3, the section being on the line C-D of Fig. 2.
  • Fig. 5 on a larger scale than Figs. 1 to 4 shows a section on the lin EF of Fig. 2.
  • the talking head has two blocks I, 2 in which electromagnets 3, 4 are disposed the cores of which are represented in dotted lines. These magnets are to coact in awell-known manner with a steel wire that extends along a channel 8 formed by the blocks l, 2 which thus constitute a casing for the wire. The wire is not shown.
  • spindle 5 Fixed to the block I are two bearings 9, ill in which a spindle 5 is rotatably mounted.
  • spindle has a head 6 that may,be-milled or serrated as indicated in Figs. 1 and 2, and also has a screw-thread II for engagement with a female thread of a bushing l2 secured to block 2.
  • block 2 is displaced 'along block I in one or the other direction according to the direction in which the spindle is rotated.
  • the distance between the cores of the magnets 3, 4 is varied so that either the higher or the lower frequencles can be made to preponderate. This is recording or reproducing speech in the first place and then musical performances.
  • the novel arrangement enables thisvariation of distance to be effected even during the operation of the device, without any parts having to be interchanged, so that it is at anytime possible to cause the higher frequencies to be in preponderance of the lower ones, or vice versa.
  • a vernier or like gradua tion I may be provided on the blocks I, 2, as shown in Fig. 1.
  • a vernier graduation is used by preference, since the distances between the adjacent cores are very small and since also the displacement of these cores should be very small.
  • an electromagnetic talking head for use with ferrous record bearing filaments, guides to position such a filament, a-palr of electromagnets arranged to be on different sides of such a advantageous in several respects, such as when 1 filament when it is so positioned, the axes of said electromagnets being mutually offset, means for variably supporting said magnets so that theextent of said offset may be adjusted, and graduated indicating means adapted to indicate the extent of said oflset.
  • a casing made in two parts forming a channel adapted to guide a sound record carrier, and electromagnetic means in each of these parts, these electromagnetic means being arranged on opposite sides of said channel and offset with respect to each other, the said two parts of the casing being displaceable with respect to each other for varying the distance between the cores of the said electromagnetic means, the said two parts of the casing being provided with a series of graduations and a on.-
  • operating indicating means adapted to indicate' the amount of their mutual displacement.
  • a. casing made in two parts forming a channel adapted to guide a sound record carrier, and electromagnetic means in each of these parts, these electromagnetic means being arranged on opposit sldes-of said channel and offset with respect to each other, the said two'parts'of the casing being displaceable with respect, to each-other for varying the distance between the cores of the said electromagnetic means, the said two parts of the casing being provided with a series of graduations and a cooperating series of vernier graduations adapted to indicate the amount of their mutual displacement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Toys (AREA)
US25354A 1934-06-09 1935-06-06 Electromagnetic talking machine Expired - Lifetime US2058399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2058399X 1934-06-09

Publications (1)

Publication Number Publication Date
US2058399A true US2058399A (en) 1936-10-27

Family

ID=7982982

Family Applications (1)

Application Number Title Priority Date Filing Date
US25354A Expired - Lifetime US2058399A (en) 1934-06-09 1935-06-06 Electromagnetic talking machine

Country Status (2)

Country Link
US (1) US2058399A (fr)
FR (1) FR790970A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499895A (en) * 1945-10-08 1950-03-07 Joseph B Walker Magnetic recording apparatus
US2561365A (en) * 1948-05-06 1951-07-24 Magnetic Equipment Inc Magnetic recording head, including a device for adjusting the gap width
US2895014A (en) * 1953-07-06 1959-07-14 United Geophysical Corp Magnetic recording head-moving mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499895A (en) * 1945-10-08 1950-03-07 Joseph B Walker Magnetic recording apparatus
US2561365A (en) * 1948-05-06 1951-07-24 Magnetic Equipment Inc Magnetic recording head, including a device for adjusting the gap width
US2895014A (en) * 1953-07-06 1959-07-14 United Geophysical Corp Magnetic recording head-moving mechanism

Also Published As

Publication number Publication date
FR790970A (fr) 1935-11-30

Similar Documents

Publication Publication Date Title
US2612566A (en) Magnetic recording and reproducing system
US2272821A (en) Telegraphone
US2618709A (en) Cylindrical contact magnetic head
GB794123A (en) Endless magnetic tape magazine
US2058399A (en) Electromagnetic talking machine
US2513653A (en) Magnetic record transducing head
US2459299A (en) Magnetic transducer with separable pole faces
US2848698A (en) Variable reluctance electromagnetic devices
US3207517A (en) Magnetic recording and reproducing apparatus
US2513617A (en) Magnetic recording and reproducing
US2431739A (en) Magnetic sound recording
US3308449A (en) Multi-gap magnetic head
US2413206A (en) Pickup arm
US2985713A (en) Magnetic recording and scanning device for tv signals
US3778560A (en) Magnetic transducing head and drum assembly with head insertable radially into a slot in drum for alignment
US2484097A (en) Magnetic transducer with wearresistant guide surfaces
US3751599A (en) Magnetic head having multiple head cores
US2006605A (en) Pick-up arm guide for sound-boxes of talking machines
US2428701A (en) Magnetic head
US2528682A (en) Magnetic head testing system
US2749391A (en) Device for the purpose of clamping a foil, inserted into the gap formed by both of the pole ends of a sound top for magnetic sound implements
US2568466A (en) Contacting device for moving wires
US2762013A (en) Flutter measurement
US3401236A (en) Magnetic tape apparatus with head positioning means
US2673897A (en) Azimuth test film system and method