US953709A

US953709A - Detachable plug.

Info

Publication number: US953709A
Application number: US50440409A
Authority: US
Inventors: Clarence D Platt
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-06-26
Filing date: 1909-06-26
Publication date: 1910-04-05
Anticipated expiration: 1927-04-05

Description

.clean contact connection with the contact.

CLARENCE D. PLATT, OF BRIDGEPORT, CONNECTICUT.

'DETACHAELE PLUG.

'Specioation of Letters Patent.

Patented npr. 5, i910.

.Application tiled June 26, 1909. Serial No. 504,404.

To all whom it may concern:

Be it-knovvn that l, CLARENCE D. PLATT, a citizenof the United States,vand,a resident of iBridgeport, in the county of Fairfield and State (if-Connecticut, have invented certain newand useful improvements in Detachable illugs, of V7which lthe following is fa full., clear, and exact description, -Whereby anyone skilled inthe art may make and use the saine.

The invention relates to detachable plugs. That is, a device which is utilized ,for connecting `a distributing ,point ot an electrical system Withany desired translating device wherein thcielectric current isvto be used.

@The objects-of the invention arelto provide a very simple .and compact device which may be lreadily attached to or rcmoved .from the receptacle containing the contacts for electrical distribution.

A further objectistogprovidea plug., in' `which the body portion, `vvhicli-naakes a suitablecontactaviththe terminal Wires through welliknown devices, may beinserted and lett :in place, .and the cap portion connecting with the, distributing wires maybeireinoved orinserted at -vvill and Withoutiliability ot undue arcing or rupture of the parts.

zstill 'further object is to provideia body lportieri :for insertion Within the receptacle intwhichfthe contact parts are arranged with isolated chambers completely protected and in themain body portiomavith .suitable confleeting channels tor-the insertion ot' the. cooperating plng; members.

A still further object, is to arrange a body portion having 4a central studicontact and a ythreaded sleeve contact .arranged yfor con- :nectionwith a receptacle wherein the sleeve contact is readily removable and will insure clips and conductorsot-tlie plug,

:Referringito tliciliraivings: Figure l.is aview in elevation. of the device with a portion ot the conducting shell broken .awayto illustratethei position of one otnthecoutact members. Eig. 2de .a central sectional view ofI the cap member. off the i plugv with itsy contacts. Eig. Biisa bottoni plan-view ofthe cap shown in eilig. 2. Fig. 4t is a top plan view ofthe main body'portion ofithe plug. lfig. 5 isa central vertical section thro-ugh theplug and contact chambers. Fig. G isia bottom plan view offthmplug illustrated in Fig. 5. Fig. ,7 is la general view offthecap and ibody portion, the latter cutinsection and illustrating the contact-membersinfierspective, removed from thc .body portion; the parts :illustrating the method ofassem- .bling and operating the device.

,in devices of the class hereinafter described, certain features are required, to make the devices safe y:t'or operation andthe conductance of current.indistribution systems. flfirst ot' all, the parts must-be so arranged .that they may be securely attached Withrefyerence tothe line wire circuits of a receptacle. These reccptaclesmaybc either of the Well known Edison type or Thomson Houston type, butithe plug member, in any :instance, must malte secure contact with 'the contacts of the receptacles. .The -removable lcap must ,also tbe provided with contacts which, coperatingwith the contact-s of the body port-ion of the plug, insure proper-ele@ trical connection, Without liability of undue arcing, short circuits, and .the lilre. .The cap vmember or vremovable vportion of @the plug innstbe so formed as tobeireadily inserted. or renioved'froin the body! of the plug, in order to provide Vfor quick -adjustability and permit the use of. oapsand contact inem` bers connected with varionstranslating devices.

-It is onc of the principalfobjects ofthe ,presentinventioiu toarrange all Otthesevcral conducting parte, ofthe device, iii-such Imanner, that they may ibe simply iformed and. assembled .andfwill insure properfaction within reasonable limits of safety.

.In the accompanying drawings :the nu- .meral l, denotes themain body'portion of ltheplug, vwhich isy provided -with v,a central stud contact?, and athreaded sleeveieontact 3, as isclearly.illustrated in Fig 5. {he body portion preferably has a linnn-led head to :facilitate sorewingtlierbody portion into and out of the receptacle containing the necessary line wire connections to cooperate Withtheccntral stud contact and threaded sleeve contact.

The maint body portion, belowtheilrnnrled head, is recessed, providing contact chambers e, 5, and thevexterior of the body portion is threaded .as at 6,'to receive the threads of the threaded sleeve contaet 3.

The recess 4, through an opening 7, provides -receptafclet'or a. spring contact naember-8, preferably of .substantiallyi U-form or with twoeleaves between .whicli-tlie contact ,member of the removable eap i, may be 'rictionally held and locked andiwithasintable base-extension 9, which may be electrically connected with the central stud con tact 2. As shown herein, the contact party 10, is formed with beveled edges to fit within a beveled opening 11, at the end of the body part and is secured in place and electrically connected with the contact clip 8, by a screw stud 12.

The recess of the body part is formed to receive a similar contact clip to coperate with the second contact member of the removable cap. As shown herein, this contact clip is of substantially U-forin with two upwardly extending arms 13, .14, the latter having a sharp bend 15, which provides a shoulder below which the cooperating contact of the cap will automatically lock. It

also provided with a spring contact meinber 16, of curved form which will tit within the threads of the threaded shell vContact 3, and bear firmly against said shell. It has a double function of exerting a spring locking pressure against a shell to prevent accidental movement and at the same time insurcs a bright, clean contact for its contact clip, as the shell is screwed over it. lt will be noted that no screws or other binding means are necessary for holding this spring contact in place and its resiliency and locking features with reference to the coperating contact member is always insured.

The upper surface of the body part is slightly dishcd as at 16a, and contracted openings 17, 18, connect the upper surface of the body part with the chambers 4, and 5, and act as guides for the

contact members

19, 20, of the removable cap portion of the plug. The dished portion 16, serves as a guide for insuring insertion of the

contact members

19, 20, within the openings 17, 18, inasmuch as, said members, may be placed against the cap in almost any position, and by a partial rotation will engage said openings 17, 18. A slight thrust of the cap through said openings will cause the

contacts

19, 20, to be pressed between the upwardly extending arms of the contact clip where, through the

shoulders

15 and 23, they will be firmly engaged and locked by

lugs

21, 22, which are preferably pressed out of the metal of the

contact members

19, 20. These

locking lugs

21, 22, serve to separate the leaves of the contact members of the plug when inserted and have the added function of preventing accidental movement and separation of the parts. The contact clip 8, which connects with the central stud contact, has a locking shoulder 23, substantially identical information with the locking shoulder 15.

The under side of the cap 1a, has a recess 24, within which are secured

conductors

25, 26, provided with wire-attaching means 27, 28, to which the line wires may be connected. The cap is also provided with a central l opening 29, through which the line wire conl nections may extend. Of course, the conductors 425, 26, have the projecting

contact members

19, 20, suitably secured thereto or formed integral therewith, and the conductors are held to the ca-p by suitable means suoll as

screws

30, 31.

ln addition to the frictional means of the spring leaf 16, for preventing relative rotation of the threaded sleeve contact 3, and body portion, grooves or

notches

32, 33, may be formed`in the body part to .be engaged by lugs 34, 35, pressed in from the 1 material of the threaded shell 3.

The device is so formed that the insulated base-piece or body part and cap may be united or separated at will and always provide proper electrical contacts between the contact clips of the body part and the cap. The chambers, for receiving the contact clips, of the body part, are formed in the side of the tubular body and are connected with the dished guide-portion 16, through the contracted openings 17, 18. Obviously, the contact clips may be readily inserted or removed from the body part upon removal of the threaded sleeve contact and the various parts of the device maybe readily assembled without the use of specialtools. The contracted openings 17, 18, are of just sutiicient size to permit passage of the

cap contacts

19, 20, and 'as the chambers 4, and 5, containing the contact clips are isolated from the surface of the plug except through the contracted openings. What little arcing occurs in the chambers is not appreciable to the user and can do no serious damage. Obviously, the device might be changed as to its several details to a considerable eX- tent without departing from the spirit or intent of the invention.

1t will be noted that no metallic parts eX- tend through the upper surface of the body part. In fact, there are no metallic elements within reach of the user when the body part is inserted in a receptacle, except the

cap contacts

19, 20, which, of course, are electrically inactive until the cap has been forced down upon the base piece or body part 1. Therefore, there is absolutely no liability of improper use of the device, and all danger of shocks to the ur is obviated.

1rWhat I claim as my invention and desire to secure by Letters Patent is 1. A detachable plu comprising a single piece insulating bo y portion having a thread upon its exterior, recesses extending into the sides of the body portion and forming chambers for contact devices, a contact clip mounted in one of said recesses and connected with a central stud contact passing through the end of the body portion, and a contact clip having a spring contact finger arranged in the other of said recesses and contacting with a threaded shell Contact,

@senos said shell ada ted to be screwed over the surface of the body portion.

2. A detachable plug comprising a single piece insulated body portion having recesses therein, contact clips located in said recesses, a central stud contact and a threaded sleeve contactoperatively arranged upon the body portion and connecting respectively With Contact clips arranged Within the recesses of the body portion, said threaded sleeve Contact being screwed upon said body portion and acting as a closure for the contact recesses and as a retainer for one of said contact clips, and contracted guide-openings extending through the body portion from the upper side thereof and connecting with the contact recesses. Y

3. In a detachable plug comprising an insulating body having contact recesses formed in the sides thereof, a threaded sleeve contact encircling said body and the contact recesses, and forming one of the contacts of the plug, and a contact clip arranged in one of the recesses and provided with a contact- I inw part adapted to yieldinely enUaOe and bebheld in place by the threanded slgeie contact, a central stud contact, and a contact i i l y l l i l i clip arranged in one of the recesses and with I an extended portion adapted to engage the i central stud contact.

5. A detachable plug comprising a body part of insulating material having contact recesses formed in the sides thereof, a threaded sleeve contact adapted to be screwed over the end of the body art, and a contact clip operatively arranged) in the contact recess and With a contact linger engaging the threads of the threaded sleeve.

6. A detachable plug comprising a body portion having contact recesses formed in the sides thereof, a threaded sleeve contactadapted to be screwed over the end of the body part, and a Contact clip operatively arranged in the contact recess and with a spring contacting member engaging the threads of the threaded sleeve.

CLARENCE D. PLLTT. Witnesses:

T. MERLE SHAW, Dow R. Banen.