US455747A - Loop-switch - Google Patents

Description

(No Model.)

W. M. GOODRIDGE LOOP SWITCH.

NO. 455,747. Patented July 14,1891.

UNITED STATES PATENT CEEICE.

lVILLlAM M. GOODRIDGE, F HIGHLAND PARK, ASSICNOR T() THE \VESTERN ELECTRIC COMPANY, CF CHICAGO, lLl'ilNClS.

LOOP-SWITCH.

SPECIFICATION forming part of Letters Patent No. 455,747, dated July 14, 1891.

Application filed March 4, 1887. Serial No, 229,667. (No model.)

To all whom t may concern: handle serving to turn the cylindcrback and Be it known that I, WILLIAM M. GOOD- forth in its bearing. On the opposite ends RIDGE, a citizen of the United States, residof this roller are mounted the symmetrical ing at Highland Park, in the county of Lake springs or levers g 71,. These levers are so 5 and State of Illinois. have invented a certain adjusted as to press at all times against the new and useful Improvement in Loopcontact-pieces fi 1.', as shown. The dil't'erent Switches, of which the following is a full, cords of a pair may be permanently conclear, concise, and exact description, refernected with contact-pieces 1' 1, and hence with ence being had to the accompanying drawthe springs g 71, respectively. Thus lever g oo to ings, forming a part of this specification. will at all times be connected with one cord My invention relates to electric switches of the pair, while lever 71l will be always confor looping in and out alternately different nected with the other cord. The clearinginstruments. out shutters may be included between the My switch is especially designed for use as contact-pieces m and the telephone may be oi; apart of the key-board apparatus of a teleincluded between the contact-pieces o p. As

phone exchange. long, therefore, as the switch is in the posi- 4My invention is illustrated in the accomtion shown-that is, with the spring g rcst- 4 panying drawings, in which Figure lis aside ing against contact o and spring` h against elevation of my loop-switch. Fig. 2 is a seccontact p-the telephone will be looped into 7o zo tional View thereof. Fig. 3 is an end elevathe cords. Cn moving the handle in the option showing the two pairs of contact-pieces posit'e direction the springs g 7L will be sepaor terminals. Fig. 4 is a viewof the opposite rated from the contacts o p, respectively, and end of the switch, showing terminal plates or connected, respectively, with contact-piecesl connections of the line. Fig. 5 is a plan on., thus bringing the clearing-out annuncia- 75 z5 showingthe escutcheon and slide forpreventtor into circuit. lt will be noted that the ing dirt from falling into the switch. Fig. U springs g L are mounted, respectively, on opis a horizontal sectional View showing the posite ends of the cylinder f, a screw passing manner of mounting the contact-springs. through cach of said springs into the cylin- Like parts are indicated by similar letters der. The screw in each case bends its spring So 3o of reference throughout the different figures. inwardly at the center, and thus a uniform The board or shelf d is usually of wood and and even bearing is obtained between the in a telephone exchange is -placed directly in springs and their contact-pieces, respectively. front of the switch-board as a part of the out- This is d ue to the 'fact that the cylinder upon fit. Through this shelt` is cut a downwardlywhich the springs are mounted is loose in its 85, tapering opening for the handle Z), by means bearings and free to movc longitudinally, ex-

of which the switch is moved back and forth cept as prevented by the springs. by hand. Over this opening is placed thc llaving thus described my invention, l escutcheon c, which is stamped out', preferclaim as new and desire to secure by Letters ably, of the form shown and bent upwardly, Patentoo 4o so as to afford room for the slide d, which is l. ln a loop-switch, the combination, with fitted to the handle and is carried backward the handle, of a cylinder of insulating mateand forward therewith in the guide formed rial, two springs mounted near their center, under the escutcheon. Thus dirt is preone upon each end ofthe cylinder,insulated vented from falling into the switch aboutthe contact-pieces included between one pair of 95 handle. The block of insulating material c opposing ends of the two springs, and other is attached below the shelf. This block is insulated contact-pieces adapted to be .inpreferably of rubber or vuleanite and serves eluded between the other pair of opposing as a frame or support for the different parts ends of the two springs when the handle is ofthe switch. moved to the proper position, substantially loo 5o The handle is inserted in the cylinder or in the manner and for the purpose specified. rollerf, which is of insulating material, the 2. The combination, with the symmetrical 5 p, and means for moving` said springs beek springs g h, of the insulated pieces or termii In Witness whereof I hereunto subscribe nalsz' 7o, against which said splingsare pressed my name this 0th day of January, A. D. 1887.

by their own tension, respectively, and the opy y s 1 posite eontaet-pieoes o1' terminals Z m and 0- W ILLIAM M' GOODRIDGE' Witnesses:

WM. M. GLLER,

and forth between contact-pieces lm and op,

GEORGE P. BARTON.

substantially as and for the purpose specified.

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