US1399268A - Telephone apparatus - Google Patents

Description

F. P. MANSBENDEL.

TELEPHONE APPARATUS.

APPLICATION FILED JUNE 13, 19M.

1,399,268, v Patented Dec. 6, 1921.

UNITED STATES PATENT oFFrca.

FRITZ I. MANSBENDEIi, OF BROOKLYN, NEW YORK, ASSIGNOR TO ULTRA. EARPHONE' 00., ENG, OF NEW YORK, N. Y., A. CORPORATION OF NEW YORK.

TELEPHONE APPARATUS.

1,399,268, Specification of Letters Patent. Patented Dec, 6,'1921 Application filed June 13, 1917. Serial No. 174,481.

To all whom it may concern: tween a tip 16 and a conductor l7,'as Well as Be it known that I, Fnrrz P. MANSBENDEL, to protect the connection against corrosion j a citizen of the German Empire, and who and external injury, a cap 19 of insulating have declared my intention of becoming a material is designed to fit over the same and '1 citizen of the United States, and a resident is attached to the casing wall by means of a. of Brooklyn, in the county of Kings and screw 20 whichpasses through the cap and State of New York, have invented certain the said casing wall and is held in a nut 21 new and useful Improvements in Telephone within the casing. The said cap 19 is re-' Apparatus, of which the following is a specicessed sufficiently to permit its base to fit upfication. on the back of the casing 10, and at the same The invention relates to telephone receivtime to press the eyes over the'tips to insure ers or transmitters, more particularly to a good contact and 'toseal the connection. portable apparatus such as is intended for The conductors 18 are brought out through use by deaf persons or with loud talking a suitable outlet 22 vcut into the under face apparatus, and designed to be more sensitive of the cap 19, the entire attachment thus than the type of receiver or transmitter in presentlng a smooth and finished appearance general use, and affording a dust-proof cover for the con- The invention has for its object to provide ductor ends which are firmly clamped upona rigid and substantial construction, consistand spread over the tips 16. A positiveconing of few and simple parts; and wherein tactis thereby insured without in any way 751" the tension placed upon the armature may dlsturblng the internal circult; and the said 1 be readily controlled or adjusted. A further conductors, furthermore, may readily and object of the invention is to provide a conconveniently be detached from the instruvenient means of securing the conductors to ment. the receiver terminals and of affording suit- In front of the pole pieces 12 is nivotally able protection therefor. secured an armature piece 25, the same being" The nature of the invention will be best located, for example, in a plane substantially understood when described in connection 'lght angles to the diaphragm 26 of the rewith the accompanying drawings, in whichceiver and the said piece is integral with Fi ur 1 is a l n f th i str m t ith or rigidly attached to one end of an arm 27 ca remov d, whose other and rounded end 28 bears Fig. 2 is a vertical section therethrough, agalns the said diaphragm 26. The lever I taken on the line 2-2, Fig. 1. thus formed may be pivoted or fulcrumed Fi 3 is a plan of the back of the instruin any convenient manner to the casing 10;

ment and shows the manner of connecting and is herein d sclosed as attached to a flexthe conductors to the instrument terminals. ible strip 29 whose ends are screwed to posts Fig. 4 is a similar View with the protecting 0 eXtendlng upwardly fromthe bott f cap for the conductors attached. h Ca ng. v

Similar characters of reference designate The diaphragm 26 is mounted 1n and carcorrcsponding parts throughout the several rled by a cap 31 whlch is internally threaded 96 views. to be screwed down over the top of the Referring to the drawings, 10 designates casing 10' correspondingly threaded. The

a suitable casing within which is mounted. II10unt1Ilg 0f the jsald d p g 111 t ap in any convenient manner, a permanent may be effected many well-known or spe a n t 11 h vin l 12 nd r id d clal manner to hold it-at the circumference 100 with energizing windings or telephone cur- 0 the Cap and preferably near the outer rent coils 13. The coils 13 are connected all thereof, as, for example, by means of through conductors lat with terminal rods-a suitable clamping ring 33 whereby the 15 extending through the back of the casing saidcap and diaphragm become so united 10 and insulated therefrom, said rods teras to be movable as one member. The said minating in conical tips 16 for outside concap, also, is provlded'with a central open- I nection. The tips 16 are preferably slightly mg 32 through winch the sound Waves are concaved and are adapted to receive eyes 17 emitted or received.

at the end of a pair offiexible conductors The end 28 of the lever arm 27, as afore- 18. In order to insure a good contact besaid, bears upon the diaphragm; and, by

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