US1512203A

US1512203A - Combination contact device

Info

Publication number: US1512203A
Authority: US
Publication date: 1924-10-21
Anticipated expiration: 1941-10-21

Description

Patented Oct. 2l, 1924.

UNITED STATES iiti PATENT OFFEJE.

FRANK C. DE BEAMER, OF BRIDGEPORT, CONNECTICUT. ASSIGNOR TO GENE}. TRIC COMPANY. A CORPORATION O'F NEW YORK.

COMBINATION CONTACT DEVICE.

Application ied October 21, 1921.

To all ic/zom it may concern.:

Be it known that I. FRANK C. DE Ranma. a citizen of the Vnited States. residinp` at Bridgeport. in they count)v ot' Fairfield. State ol' (lonnecticut. have invented certain new and useful improvements in Combination Contact Devices. of which the followingr is a specification.

There are on the market. broadly speakingr` three kinds ot attachment plug caps. one having parallel blades thru which the electrical circuit is established. the second. tandem blades. and the third. a combination of the two precedin; r types.

lt is highly desirablf` that the receptacles which are to receive these caps shall be of such a character that the different caps can be used interchangeably. Owing to the fact that the blades in different types ot caps 0ccupv planes at right angles to each other. and to the further tact that the receivingr devices are necessarily small. the problem is to devise suitable fixed contact devices or clips which will receive all of said tvpcs ot blades with equal facilitv. which will not Work loose, which will afford ample contact surfaces to establish the proper circuit connections aLl which will have long lite in service. A

The object of the present invention is to improve the construction of fixed contacts or clips for attachment plug4 cap receptacles.

For a consideration ot what I believe to be novel and my invention. attention is directed t0 the accompanying description and claims appended thereto.

In the drawing. which is illustrative, ot one of the embodiments of my invention. Fig. 1 is a perspective view of a wall receptacle adapted to receive an attachment plug cap having' tandem blades or parallel blades or a combination of such blades; Fig. 2 is a perspective view of an attachment plug cap havin,f Y tandem blades: Fig. 8 is a similar view of a cap having1r parallel blades: Fig. 4 is a perspective View of an attachment plut: which is itself adapted to be screwed into a lamp socket or other receptacle and is capable of receiving caps ot different types: Fig. 5 is a sectional view of a receptacle showing the arrangement ot' my improved contact device or clip therein; Fig. 6 is a plan view of the same, the upper half of the receptacle being removed; Fig. 7 is a. perspective view of a contact device or clip and Serial Noy 509,344,

also of parts of tandem and parallel blades. and Fig. S is a plan viev` ot the sheet metal blank troni which the contanti device is matic. the last two figures heini; on a greatly enlarged scale t'or the purposes ot iili1st 'ation.

9 indicates the base portion oi' a receptacle which :nav be made in any suitable manner. l() indicates the insulating top or removable portion. the latter 'twine` provided with two opposed T-siiapcd opti ti. The walls or" thtl openings are slightlyy larger than the blader on the attachment pli.;r caps and preterablj.- the limiti contacts or el. 1 are located below the t'ront surface or tace so as to prevent danmr to a person' *from electrical shocks and also to prevent; improper connections. The vertical parts ot' thc T slots are arranged to receive be 'ten dem blades. and i`hc hori7ontai. the paraiiei blades. rl`he construction :dao i use ot` a combination ptoii cai: e' one blade ot" the, so--caliw1 tanden; 'type one ot' the socallel parallel type. a be readilyT understood.

The removable part in addition tf; l'orfn ingr a flat seat tor the attachment plug cap is provided with screw terminals i2 and il to which the line conductors are fastened. The said part is also provided with slotted clips 14 (onljvY oney bein;T shown). b v means of which the ria'eptacle can be mounted in an outlet or jui'iction box.

ln Fig. 2 is. dnrwn in insulating.t cap iii having two blades 1G arranged 'in tandei'n. each blade beine' provided with a lwnt-over end and a screw 1T to connect it to one part of a current cari-viner cable. The. cable or cord is admitted to the cap thru the hole i8. The cap shown in Figi. is similar to the one shown in Fig. .2 except that the blades i6 are arranged in parallel. To preventy thc .small strands ot wire in the cord from gettingr in the. path of the blades a thin sheet of insulation 19 may be slipped over the blades and seated on the In the case ot the tandem blades each is provided with a small V-shapcd notch "20 which en gages a part ot the fixed contact. to form a, locking;` device and also serves as a part of a seatingr means. In the case of the par-allai blades each is previo -d with a small ope-ning 21 for the same purpose.

In Fig. 4 is Shown a plug 22 that has a screw threaded metal shell 23 and is adapted to be screwed into a lamp socket or other properly formed receptacle. In this een "ztion the shell 23 forms one side of the inuit, and e grenier eilninal 22a the other. he iront face ofthe plug is made fiat to .torni e, t Em a wip mil has double op- ;ffieed 'T l fined mints.

lefe the combination Ponte is desirable to make le without, however, si. M L. .t ontnet area neeessay to the current Witlio'ut appreciable loss on the one lumai or [influe wear on ille other. t its also iieigmftent to reiluee the number of parte' to Il1rininn1f-" n :zml avoid joints. To meet these conditions the mutant is formed of sin fle sheet metal blank and Without jo lhe blank @an eflventiigeously be matie of eff materiel such :le phosphor loewe. The bleek ie of the shape illustrated m isili' mi 'termed by :i blunlinn (he.

lvszt ii; te x titi-ee arni and l e-izf'h s :v: their innerenfls. The naz-*n irs meile eomewhet wider than the nhere beeeise an inner end portion of it ferme; the heee of the tiniehefi '4t-lip. The arms il@ finti 2T are each proviflei with a omxfled lecliieg 'projection which. www

intiem-2 lie in the plone of the ingre' :mii

the V-slieeeil notch 1330 in the lli Uf Fili) el Y@ l are prete-mhh; so poeitimewi that *y 't g resfgmie of@ file blmlee in cilii'eetion tending; to met' the can towei'fi n' :eat .Af the jametion in" bhe of the neme t e ami hiee emitnet ingeze all efctexil" ing at right amg ee bese emi thex'et'm'e i n the Send: enmil iiir'eelion, The ellen-.45:

" "ne Het violiif #i Mee te enum fini: the iflanh' in the ft ,omen i1, very sie@ mercati tirez; form said offsets and then bend; the einem to .the @lesitefi Shape. The fingere and "ll" occupy perellelgivlnnee nl Winle the finger T353 ne wies a which of the other efeff iii e when ifi-ille'l are nmn' i. im their me ,i'lpporig wl ther it he the fmeehown in i L l er Fig. for* keine@ Lich if #anni in pieve by n miele square not i the laeir' hein," eleive if; le A vezfml fiom rife .le by the have o arme or limi-ere e the een@ ei" arnese, edvantegefgms in structures.

One of these clips is eleetriimlly connected to the terminal l2 by a conductor 12, and the other to terminal i3 by the comlueter lila, in the Case of the eonstruL-ton shown in Fig. i. ln the case of the construction shown in Fig. 4 one clip is eleetrically eonneeted to the screw shell '23 and the other to the central terminal 22a.

On pushing the blades of the attachment cap of Fig. 2 into place in the receptacle each blade i6 is engaged by the Contact fingers 26 and and the rounded locking projection 28 on the finger 27 enten!"N the V-Shaped notch 2l) in the blade from the Side and prevents the blade 'from beingr accidentally displaced. It also aids in establishing the Circuit connection because itis 'foieed against the blade by the Spring pressure of the finger itself. When the blades of the cap of Fig. 3 are pushed into pieve they pase between the fingers enelV 2? of each clip and are also engaged by the edges of lingers 26, and the projection 2S. thereon enter the holes Q1 and leek the blades.

.le aeeerdnnee with the previsione of the pula-nt Statutes, l have desm'ibeil. the prineinle of operation of my invention, together with the appiwetns which 'new eonfsifler to i'ejnesenil the beet emboiliment thereof; but l :lenire to have it unciei'stood thfit the appan tue Shown is only illustrative and that the intention een be Carried ont by other means.

lVlmt l' claim es new :mit ileeire lo se eme if); Letters Patent of the United States., is:

l. ln a plug .i'eoeptmrlfa e, eonteot member im' weeivieg plug eoneet blades, seid eenm-t member compriei. e re1tzx.nmler bese pe tion and three een fingere intePi-:il tiwewith f'fxlienfling eubnteniially @expendio uiailv therefrom in the seme direetion, each et .wifi fingere joining the at and along :s Sey'vmzzte edge therein? whereby two of :miti fingers lie in parallel planes with the remaining' finger' l Y in e. piene. att right ingles to ezxifl film cenit. it hleiie influx.. nfl integz'fti with Y. nl? '.ifles o? o? will lingers. each oi said piojeetonf; iying in the of the finger with Whieh it ii'itegmi.

2. in a plug 2'eeeptreflel Pomati' men'fbers for renewing ping eontmft blzuiee. veel), of snirl eonmet n'sembeis n ej m'ine niet metal nfl oznpising 1. be@ gmrtiov uitweg iv :at pinete migre thereof whereby two of saifi line'es lie m parallel planes with the finger lying in e plaine at rightto said plen, one

of Seis 'mgers being wllel' their; and. overlying the two remaining fingers and said lastnamed fingers bein each provided with an integral contact bla e locking projection.

, said fingers being of the same width as that portion of the base which it joins and extending outwardly from the base perpendicularly thereto, and the remaining contact 'iingers each being provided with offset bends between outer land inner end portions thereof, said end portions of each finger lying in planes perpendicular to the base portion and to the planes of correspondin portions of the other finger, each of said lastnamed contact lingers being provided with an integral contact blade locking projection along one edge, such edge of the one corresponding to such edge of the other and the projections lying in the planes of lheir respective fingers on the outer end poition of said fingers.

4. In a plug recepacle, a Contact member Sor receiving plug contact blades which lie in planes at right angles to and intersecting each other, said contact member comprising a rectangular base portion having a central perforation, three contact lingers integral with the base portion, being formed therewith from a common sheet of metallic spring material and joining the base portion each at a separate edge and side thereof, a

lfirst contact finger being substantially straight and extending outwardly from the base portion in a. plane substantially perpendicular to the base portion, a second contact linger extending outwardly from the base rtion in a plane substantially parallel with and adjacent that of the first contact finger and being provided with an offset between its base end and its outer end whereby an outer end portion lies more closely arallel with and adjacent the first contact nger than the remaining portion thereof, a third contact finger extending outwardly from the base portion in a plane substantially per ndicular thereto with a face adjacent an substantially parallel with the second contact finger and an edge adjacent and substantially parallel with the first contact finger, the third contact linger being provided with an oll'set between its base end and its outer end whereby an outer end portion lies more closely adj acent the second contact finger thanY the remaining portion thereof, a projecting blade locking means formed on an edge of and integral with the outer end portion of the second contact finger adjacent the third contact finger, and a. projecting blade locking ymeans formed on an edge of and i tegral with the outer end portion of t e third contact linger adjacent the first contact l r, each ofsaid locking means lying in t e plane of that portion of the contact finger on which it is located.

In witness whereof, I have hereunto set' my hand this 19th day of October, 1921.'

FRANK C. DE BEAMER.