US1160902A - Diaphragm-horn. - Google Patents

Description

D. A. MCCGNNELL. DIAPHRAGM HORN. APPLICATION man APR. 2, 1913.

l 9 l 60,902, Paente Nom', i915.

2 SHEETS-SHEET i.

I A W f/Z@ D. A; MCCONNELI.

DIAPHRAGM HORN. APPLICATION FILED APILZ. I9I3.

Patented Nov. 16, 1915.`

2 SHEETS-SHEET 2.

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w/mtssfs v wenas f URNEY Uhl-T@ STATES PATENT DUNCAN A. ld-'JCONNELL QF LELNGTDN, NEVI JERSEY, ASSIGNGR, BY NESNE ASSIGN- MENTS, TO LGTELL-MCSQNNELL MANUFACTURNG COIANY, A CORPORATION 0F DELAXV'HE Application filed April. 2, 15H3.

To f//Z whom if may; coguwrn.'

lle it known that "L DUNCAN lioCoN- Ni-iiirr n eitixen ot' the llnited States, and resident of .'Xilingtoli. in the county of Hudson and State ot ew Ilereey` have invented certain new and useful improvements in Diaphragm-llorns, ot u'hieh the following is a Specification.

Tl invention relatcg to mechanical or diaphragm horns and more pai "icularlp7 to that type in 'olii-en the diaphragml ,is Zfr iven a partly forced and parti;K ire-e. `oibratimi at high speed o); a rotor driven from a suitable motor.

Pity invention involves certain improvements in the co: :iruction of die motor and the mountingr oi it. in proper relationship Vto the'diaphragzn. and the main objects are to Simplify the consti-rietion1 reduce the number or' parte, render the parte more accessible and more easy to assemble, adjust end inspect. and to reduce the cost ol mamita@ ture to a minimum without reducing the eiliciency of the device.

in important feature of my improved construction involves the utilizing' of the rear.diaphragin-oasing member as a part of the motor Atraine and as one support for the arn'iaiinre Shaft, so that the remainder of ne motor 'frame ma?1 be eimplilied to a. single U-shaped casting secured thereto.

A further important Jeature involves the supporting' of the end of the motor toward the diaphragm b v an annuler well also serving' as a. diaphragm clamp.

@ther in'uLiortent features will be more particnlartipointed out hereinafter and the n wel entilree. defined in the claims.

Reference to he had to the aeeon'ipan'vf ing' dran'i in which Similar reference charac-tere ndicate ci'irreeponding parte throughout the several views.

Figure l a central longitudinal section or horn embodying im' invent-ion, said section being taken on the line 1-1 of Fig. 4f, part ot the resonator being broken away; Q is an inverted plan View, the motor casing and support beine shown in section and the diaphragm and resonator being removed; and Figs. 3 and e are sections on the line 3-3 and i 'i respecnively, of F l.

have i if invention enibodi n diaphragm l() and resonator or erogect The diepnrefrin Speccatior. ci Letters Patent.

its center or in the vicinity thereof is provided 'with a suitable Wear-piece i9 adapted to be engaged b v the rotor to gire the diephragin the desired ribraiions. The oon struction and mounting the diaphragm does not involve anyv portion of inf. innen tion and may be Yaried or changed without in any Way departing from, the spirit of my invention. Preferably these parts are similer in construction and operation to the Corresponding parts in the commercial llaxon horn, or as disclosed in the patent of Miller llcese l-lntchison` Number @0l-3570i, issued November 5th, i912.

.is previously stated my inrention relates particularly to the contruction of the motor and the means lor mounting and supporting the saine ln the preterm-d en'ilamlinientillustrated l locate this motor within tho rearward projection oi the diaphragm or cese, and the armature shaft 2O ot the mot-or is substantially perpemlicular to the diaphr;V gm but eccentric in respect thereto. The armature shaft carriee a rotor 3l in the form of efface cam or ratchet haring projections. corrugations, irregnlnritie or tefl Y to si'icces i\'ely engage with the Wear-piece 19 or other thrust member. The eecentricity of the armature Shaft is sulistantialljr equal. to the effective radine of the rotor, although it is 'vident that any other suitable and Well known means may be employed for transmitting; motion from the operating face of the rotor to the center of the diaphragm. he particular arrangement. ot' rotor and wear piece illustrated constitntee no portion of my invention, and therefore any other Snitz-.ble means may be employed in place of that shown. for securing the vibration of dia- ,liragm upon the rotor of the armature shaft.

@ne of the arineipal objiec'ts of my invenf tion is to simplify thc construction by reducing the number ol parts and the weight ot said parts to a minimum. and one way in which .l secure this object is by utilizing the rear diaphragm casing section as a part ot the motor frame. lre'lerably the rcar diaphragm casing section l5 is in the form ot a dishcd disk and includes a transyerse wall 22 spaced .trom the. diaphragm and substantially parallel thereto and connected to the clamping portion 1i by an annular peripheral wall including a cylii'ulrical portion and an inc lined or conical portion The transverse wall is spaced Vliroin thc diaphragm a suilicient distance to permit the positioning ot the rotor and wear-piece therebetween and permit the proper vibration of the diaphragm. rl`his casing section has the transverse wall E22 provided with an opening through which thc wires or other conductors may freely extend. rl`his transverse wall 22 serves as a bearing tor one end ot the armature shaiit 2l) and for supporting the opposite end I provide a sul'istantially U-shaped frame member having sideI legs or bars 2li and 27 extending rearwardly from the wall 22 and a transverse portion 2S substantially parallel to the wall 22 but spaced therefrom and formed integral with the side hars Q6 and Q7. The armature shaft at the end away from the liaphragm is supported in the transverse, portion 2S of this U-shaped member. as will be described more in detail hereinafter. Thus, it will be noti-d that the U-shaped bar supports one end o'l thc armature shaft and the rear diaphragm casing section '15 supports the opposite end and that the two together make up the motor frame, while the saine men'iber which tol-ins one end wall ot' the trame and supports one end otl the arn'iature shaft also serves as the diaphragm clamping' member. The two parts may be secured together in any suitable manner as ior instanceI by screws 29 extending through the wall into the ends of the side bars 2G and E27. The two side bars 2G and 27 serve to support the pole pieces ol the motor and in Jfact may have inwardly projecting portions 30 integral therewith and constituting said pole pieces. The field made up sepa ately and after being provided with suitable casings to hold the separate wires ol the coil together may be slipped on over the pole-pieces prior to the placing,r of the armature therebetween. Thus, the motor may be very easily assembled by first slipping the coils over the pole-pieces, then inserting the arn'iature thereon, and then securing the U-shaped frame member to the wall 22 by means ot the screws 29. For holding the coils in position upon the polepieces and preventing their slipping inwardly or becoming accidentally displaced coils 81 are preferablyv so as to Contact with the armature. l provide suitable spring clips 42 which may extend across irom one coil to the other and may beheld l'roni inward movemcnt by engaging wilh the pole-pieces.

The transverse portion H oli' the motor trame mcmbcr is provided or projections 332i. il and 353 on thc outer sln'iacc and thcsc thrcc projections have alined openings substantmlly parallel to said portion 2S. lYithin the openings oll the two cnd projections i321 and 35 arc the brushcs -l which are adjustable and are held in place in any 'suitable manner. 'l`wo insulated wires 37 lead from the two coils to the outcr ends oi' the two brushes and two insulated wires S lead troni the coils through the opening' 25 to teri'ninals on the inclined or conical wall 2l. 'l`he terminals l may be ot any suitable character. I have shown bolts extending through insulated bushings and having lock nuts at the outer end tor with three lugs retaining the wires. rlhe central projection 'i-l not only has an opening transversely thereotI through which the brushes may extend. but also has an opening axially ot' the motol and serves to receive one end ot the arniatureshatt and the connnutator 30 with which the brushes engage. 'lhe end oi' the armature shatt preferably iits within a. socket in a plug al() screwed into the outer end ot the projection 54. and by adjusting this plug the armature may be moved endwise. a limited distance to insure the proper contact ot' the rotor with the w rar-piece and thus absolute accuracy in the Jforming or assembling of the p'arts is not required and wear may be taken up. The plug` may be held in place,v by a lock nut- 41 and preferably has an annular external groove communicating with an oil duct in the projection 534, as shown in Fig. i and com1uuni eating with the socket for the armature shaft through a small opening as indicated in l`ig. 1. For lubricatingr the armature shaft at its opposite end I may provide a small duct 43, leading downwardly from the cylindrical wall 23 to the bearing of the armature shaft and upon the side toward the diaphragm, so as not to intel-tere with the armature or coils. For protecting the motor. l provide a thin casing 44 preferably ot' metal and preferably ot. cylindrical form. The casing is shown as being of cup shape with the open end slipping on to the cylindrical wall 25E and then held in place by suitable screws 45. The .length ot' this cylindrical wall determines the endwise sliding movement ot the casing and the casing is preferably considerably smaller than the '(liapliragin, so that the inclined Wall serves not only to limit the position of the casing 44, but connects the casing of small diameter to the diaphragm clamps of larger diameter.

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