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Publication numberUS1368261 A
Publication typeGrant
Publication dateFeb 15, 1921
Filing dateJan 22, 1919
Priority dateNov 3, 1917
Publication numberUS 1368261 A, US 1368261A, US-A-1368261, US1368261 A, US1368261A
InventorsOmega Jenkins George Mark
Original AssigneeWestern Electric Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1368261 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



Patented Feb. 15, 1921.

v. The brackets 11,

means of screws passing through the block i is provided Jfor the transmitter box in and rigidly secured in the transmitter casing. The ends of these screws, which are preferably platinum pointed, extend through bearing holes'in the brackets 11, 11 and engage contact points on the springs `13, 13'. 11 are secured in place by 15 and since this block is of insulating material, the brackets are insulated from each other and can therefore be used as terminal connections for the electrodes of the variable resistance element which are electrically connected to the contact screws 12, 12. mounting vand a counterweight 14; is provided so that irrespective of the position of the transmitter box, the transmitter itself will be in such 'a position that satisfactory transmission will result. Since the efficiency of the transmitter is only aHected by movement in plane perpendicular to the diaphragm, vit, is necessary to provide for automatic adjustment in that lplane only. Located at the bottom of the outside of the transmitter box is a or similar material jacks 7, 7 A four-conductor plug 16 adapted to engage the jack'?, 7 is connected to a exiblecord 17 by means of which the-necessary/circuit connections are made to the other station or to intermediate apparatus. The apparatus at each station preferably includes a pair of head receivers 18 securely fastened to a headband 19 which is adapted to pass over'the users head and is secured in place by means of a strap 20 passing un'-, der the chin. Each'head receiver is provided with a transmitter switch arranged for connecting thetgansmitter 4into the circuit automatically .when the user lowers his head' to a convenient position to talk into the transmitter box. rThis switch is operated by the switch wire 21 which extends in a loop from the two head receivers and passes 'under a strap 22 on the front of the transmitter box 15. The method of operation of.

this switch is shown in detail in States Patent No.

The transmitter swings freely in itsblock 15 of hard rubber in which are secured the transmitter.

Il@ United 1,298,217, ot arch 25, 1919, and is not described here in detail, since it forms no part of the present invention.

What is claimedl is:

1. ln an arrangement between aviators or` the like, sound proof boX in which is mounted, and means `for communication. a transmitter, a aid transmitter being so balanced as box, Ysaid transmitter 'or most eiiicient to remain in the position operation irrespective of the position of said 3. 1n an arrangement for communication between aviators or` the like, a transmitter, a air of mounting brackets for said transmitter insulated from eachother, a 'pair of contact screws' secured to the casing of -said transmitter and journaled in said mounting brackets, and a pair of contact springs adapted to bear against the end of said contact screws.

4. ln an arrangement for communication between aviators or the like, av transmitter having its-variable resistance element terminating in a pair of contact screws, a pair of mounting brackets .for said transmitter insulatedv from each otherv and provided with bearing holes for said .contact screws, and a pair of contact springs secured to'said mounting brackets and adapted to bear against the ends of said' contact screws to provide current-carrying means to said In witness whereof, Ihereunto subscribe my name this 31st A'. D., 1918.

stoner. mime OMEGA mams.

for pivotally mounte ing said' transmitter within said transmitterv day of `-December,

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2456346 *Jan 24, 1945Dec 14, 1948Veneklasen Paul SSound shield for telephone transmitters
US2465985 *Jan 29, 1946Mar 29, 1949Veneklasen Paul SNoise shield for handsets
US2526177 *May 7, 1946Oct 17, 1950Dictavox Company IncMask for excluding ambient sounds
US2572547 *Sep 1, 1948Oct 23, 1951Webb Horace LDictation mask with cartridge type silencer
US2790038 *Oct 28, 1953Apr 23, 1957Socapex PonsotTelephone ear-piece
US2831070 *Aug 4, 1954Apr 15, 1958Soundscriber CorpSilent dictation mask
US5197098 *Apr 15, 1992Mar 23, 1993Drapeau Raoul ESecure conferencing system
US6929164 *Apr 11, 2003Aug 16, 2005Clarence ThomasNeck wrap/brace for holding items and belt article holder for same
US20020077838 *Dec 18, 2000Jun 20, 2002International Business Machines CorporationSound muffler device for use with a portable phone and method and system in electronic commerce for reservation and lease of the sound muffler device
U.S. Classification379/430, 381/370, 381/355
International ClassificationH04R1/08
Cooperative ClassificationH04R1/083
European ClassificationH04R1/08D