US978199A - Plug for electrical conductors. - Google Patents

Description

W? fnzssrss J. W. PHELPS. PLUG FOE ELECTRICAL GONDUGTORS. A'rrmu'uon FILED 1130.5, 1908.

Patented Dec. 13,1910.

'on'irnn STATES PATENT OFFICE.

JAMES W. PHELPS, OF DETRGIT, MICHIGAN.

ILUG FOB ELECTRICAL CONDUCTORS.

Specification of Letters Patent. Patented Dec. 13, 1910.

Application filed December 5, 1908. Serial No. 466,175.

I l t contact E may he revolved to screw the same into the threaded socket while the member A is held stationary.

The electrical connections for the plug are formed by contacts iii and X u on opt isite sides of the tlattcncd portion (J of the inenispaces upon opp site sides of the portion C It is an object of the invention to obtain a construction with which the conductors iuav I be easily and securely attached to the plug, contacts, and are so located as to avoid the possibility of short circuit.

her A and clamping screws O for securing the said contacts to the ends of the tlcxihlc conductors This conducoi is the usual cord P, the separate strands of which pass through apertures in th member .r into the 7 and are there Secured by the clampin screws 0 to their respective contacts M and 1 The contact M has a portion bent over the top of the member 0 and in electrical contact with the bolt 1; which forms a CUllIlBC- It is a further object to provide m ans for revolving the threaded contact while engaging or disengaging the same. from the socket without rotation of the plug or cord.

forth.

In the drawings Figure l is an cnlzwgcd longitudinal section partly ii; elevation through the plug; with the cap member in section n line :1:;c, Fig. 1; Fig. 3 is a section on line y-3 Fig.2. A is a member formed of insiclating material, preferably vulcanized rubber which and an upwardly projecting flattened post section C. Surrounding the post C is a cap section which comprises a circular insulator tion to the nut K, and the latter forms the central contact of the plug. The Contact .lHClillJBl X is arranged -upoii the opposite side of the portion C, ill-ll is provided with With these objects in view the invention consists in a construction as hereinafter set an outwardly extending portion (Q, which at. its outer cud is turned downward across tliepcriphcr v of the portion, and is inaiiii tained tlii'cadcd contnct int-iuher r1. Thus in every Fig. 2 is a plan view;

in ticcl'lltztl connection with the position of rotary adjustment of the contact nicinocr l-I CUHIRCUUI) \\'lll he maintained with the contact Xi The under side of the portion ii is re Icessed and threaded to engage a threaded portion ll of n nicinht-r S formed of insulatis provided with a circular base portion ll ing material. This nicinliei' is ct-nttally up crturcd for the pns-ago of the cord 1'' therejthrongh, hut this aperture is out of alincthe base portion of which fits about a circulat portion 1- of the member A of smaller diameter than the portion B.

G is a-ring of insulating material, which is attached to the nicrnl'icr ii, and is seated against the shoulder H of the portion ll.

position a screw 1, which engages a ccn- .Qrnt with tl.-e upt -rturcs '1" and '1" through cap D and a threaded metallic contact l,i

which the strands of the cord pass to the contacts M and i\. By reason ot-thts construction, when the member 5 is screwed into its socket i: will form a clamp which will se urely ip'the lntorally-extending strand I portions i" of the cord 1, so that an stress f applied to this cord will not be transmitted The members U, la and t aresvcurctl in i time, the clearance space surrounding the.

contacts M and is so large that there is no danger of short circuit by r ason of the end of the conductor coming into contact with the metallic partsait' the plug. After the commions are made. the members D, E and G are replaced and secured by the nut K. The plug may then be engaged with the socket by turnin; the member (i, which will rotate the contact ii i relation to the memher A. and permit of engagement with the threaded socket without any twisting of the ('(Il'tl.

'hat I claim a my invention is:

1. An electrical contact plug comprising a body member having a recessed base. a member of insulating material having a threaded engagement with said rcccss and centrally apertured, contacts mounted upon opposite sides of saizl body member, and flexible conductors connected to said contacts'passing through apertures in said hodv member into aid recess and upon opposite sides thereof and then extending laterally through said central aperture whereby said insulating members constitute, a clamp for said conductors.

2. An electrical contact plug comprising a body of insulating material havinga trans yersely projecting integral flattened portion of reduced cross section. a metallic contact of rcduccd cross secti n. a metallic contact Iucnibcr urrounding said flattened portion. spaced therefrom and rcmorably au'iycled upon said body. and .ucans upon opposite Sltltfi of said flattened portion and in the space iucloscd by said metallic contact for attaching the conductor to the flattened por tion.

-l. .\n electrical contact plug comprising a body of insulating material baring a transycrscly projecting integral llattcncd portion. a threaded contact member surrounding said flattened portion. spaced therefrom and remoiably .'i\'clcd up n said body, and tersaid projection. one. of said connections havin; a laterally ext nding p rtion projecting into engagement with the. threaded contact.

5. .\n electrical contact plug comprising a body of in ulating ma ial haringa transrcrscly projecting integral flattened portion. a rerolulile threaded contact member swirelcd upon said body. a stationary contact mcmhcr carried by said projection, and 1 terminal connections upon opposite sides of said projection, one or said connections l W- ing a laterally extending flange engaging the tationar contact member. l i

6. An electrical contact plug'coznprising a hotly of insaiating material haring an integral tans-rerscly projecting fiattened 391" tion, a rcroluhle threaded contact member, swivclcd upoi i 'caid body, an insulating cap for said rnenifir. a stationary contact projecting outwardly through said integral pro: jection and cap and forming means for clamping tire tl'ireaiiled Contact to the body portion and terminal connections secured to opposite sides of said flattened portion, one of said connections having a laterally extending portion positioned intermediate the end of the integral projection of the body and the cap and engaging said stationary contact.

T. An electrical contact plug comprising a body of in ulatiug material havinga trans- \'cr-"ely projectingintegral flattened portion.v

a threaded contact mentber surrounding said flattened portion. spaced therefrom and 'reniovably swiveled upon said body. and terminal connections upon opposite sides of said projection. one of said connections having a laterally extending portion projecting into engagement uith the threaded contact, and the other of said terminal connections having a portion projecting into tngagement with the threaded contact.

3. .\n electrical contact plug comprising a body of insulating material haringa trans \'cr.-ely pr iecting portion of reduced crosscction. a threaded contact member swireled up n said body portion. an in .lating cap fixedly secured to the end of said threaded contact member. and a stationary contact mcmber paning through said body trans- (l'scly projecting portior. and. cap and forming a mean for securing the threaded contact to the body.

9. in electrical contact pluIr. comprising a hudy member having spaced apertures. contacts carried hy said body member. a member of insulating material having a screw-tbrea ed engag ment with the body inci-ibcr and central y apcrtured. said apertures hem; out of ahnement with each of said spaced apertures. and flexible conducihrongh said spaced apertures. and then extending laterally and through said central apert u re.

in testimony whereof I afl'ix my signature in presence oftwo witnesses.

JAMES .V. PHELPS.

'itncsaes:

NELLIE Krnsnnna, W. J. Baum.

; t -rs connected to the contacts and passing niinal connections upon opposite sidca ot'l

Images