US1262320A - Porcelain pull-socket. - Google Patents

Description

E. H. FREEMAN.

PORCELMN PULL SOCKET.

APPUCATION FILED NDL 3.1915.

1,262,320. Patented Apr. 9,191&

2 SHEETS-SHEET I NFH-Hulk f 1 E. H. FREEMAN.

PURCELAIN PULL SOCKET.

APPLICATION man noma. |915.

1 ,262,320. Patented Apr. 9, 1918.

2 SHEETS-SHEET 2- UNITED STATES` PATENT OFFICE.

EDGAR H. FREEMAN, 0F TRENTON, NEW JERSEY, ASSIGNOR T0 E. H. FREEMAN ELEC- TRIC CUMPANY, OF TRENTON, NEW JERSEY, A CORPORATION OF NEW' JERSEY.

PORCELAIN PULL-SOCKET.

Specification of Letters Iatent.

Patented Apr. 9, 1918.

To all whom t may concern.'

Be it known that I, Enma Il. FREEMAN, citizen of the United States, residing at Trenton, in the county of Mercer and State of New Jersey, have invented certain new and useful Improvements in Porcelain Pull Sockets, of which the following is a speciication.

This invention relates to electrical pull sockets of the type wherein a pull chain, cord or equivalent llexible pull element is employed for operating the socket switch to make and break the electrical circuit through the incandescent lamp.

A primary object of the invention is to provide a novel and practical construction of all-porcelain pull socket, wherein all exterior metal parts are dispensed with, and a structure is produced possessing special utilitv as a Weather-proof receptacle and speci cally meetin the requirements of the Fire Underwriters Association with respect to sockets of this character.

Another and important object of the invention is to improve the guiding means for the flexible pull element in order to olivi-.ite the prevailing objection to the unsatisfactory action of pull chains particularly in an all-porcelain type of pull socket. In that type of pull sockets, great difficulty has so far been experienced in providing an easy movement and action for the pull chain. This action is ordinarily stii and jerky, and in some directions of pull the pull chain is liable to become caught so as to actually interfere with the operation oiimthe socket switch. Accordingly, one of the distinctive purposes of the present invention is to provide an all-porcelain pull socket ha ving adef quete and reliable means for smoothly and evenly guiding the pull chain so that it will freely and readily draw away from the socket in any direction, at the saine time causing a positive and responsive actuation of the socket switch. In' connection with this phase of the invention, the saine contemplates a novel assembl of the interior porcelain. arts with relation to the socket switch an its operating mechanism, said assembly being formed with special reference to a proper guiding of the switch lever, and the pull element connected therewith.

With these and other objects in view Vwhich will readily appear to those familiar with thi@ einen of devices. the invention consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated, and claimed.

The essential and distinctive features of the invention are susceptible oi some strnctnral changes Without departing from the spirit or scope thereof, but a preferred and practical embodiment of the invention is shown in the accompanying drawings, in vvhich-w Figure l is a longitudinal sectional View of a porcelain pull socket embodying the present invention, and shown completely assembled, the line of section being indicated by the line l 1 of Fig.

Fig. 2 is asimilar view of the completely assembled socket on another line of section, designated by the line 2-2 of Fig.

Fig. is a cross sectional view on the line 3--3 of Fig. l.

Fig. 1i is a top plan view of the interior removable insulating cap block, which cooperates with the interior base block to provide an insulated support and housing :for the working parts of the socket switch.

Fig. 5 is a plan view of the under side. of said cap block.

Fig. ti is a perspective view of the porcelain socket body, with a portion of the Wall thereof broken away to expose the interior insulating base block and the cooperating elements of the guiding means formed integrally with the porcelain body. 1.

Fig. 7 is a perspective view of the removable. cap block with all metal parts omitted, and exposing its portion of the guiding means for the switch lever and the flexible pull element connecting therewith.

Figs. 8 and 9 are sectional views similar to Figs. 1 and 2 With all metal parts ointted., to more clearly expose the structural features of the porcelain parts and their operative relation.

Like reference charmzters designate corresponding parts throughout the several figures of the drawings.

As already indicated, the distinctive and important features of the present invention reside in the structural characteristics of the porcelain parts and. their operative relation with special reference to forming novel and reliable means for smoothly and evenl)7 guiding tlupull chain regardless of the direction or angle of pull thereof. inglv. referring first to the primary ele- Accordment` of the inwntion. it will be obaerwd that (la socket bod) l is constructed oi' one piece o t' porcelain or equivalent ,inhalating material and has no external metal part-` associated therewith.

The `mill onepiere porcelain or equivalent Hochet bolliv l hanv l'ormeil inlogt-all) therewith. at an intermediate point between itsI opposite ends, a solid partition wall 2 which divides the interior ot' the body into what nia be termed for convenience as an upper ewitrh compartment Il and a lower plug receptacle L The upper switch com* pariment- `l i adapted to be entirely ine-loert! :ind covered by a .separate detachable poi-ee lain eorer tomber haiing a lianncd edge portion t3 whirh overlaps and engages the peripheral entre of the bod)V at one end thereof.y time providingr an effective z-ealin; r corel' for the body.

rllu- Folid partition wall z within the Socket body not only separaten and iaolateal one compartment of the bod) from the other, but also constitutes an interior insulatingl base block l'or the socket switch. and to that end.y the said wall or base block in recfeeeed at its upper Side as at i' to provide a will-h chamber for the Soc-liet .wilch. l`nrthermore, at one edge. of its recerieled or chaln bcred side` the` Said wall or bane block is formed with a segmental rabbet 5 constitoting a guiding ledge, for the swinging' end o't' the Switch lever to be presently referred to, and the rablieted formation which provides this ledge also produces stop shoulders 9 and 10 at the opposite ends thereof for limiting the forward and back. 'ard more* ments of the switch lever. 1n connection with the segmental ledge formation 8, it will be observed particularly by reference to Figs. 6 and il of the drawings,` that what may be termed the outer end portion olE the guiding ledge. of the rabnet directly ad- ]oins a guide projection ll at one edge of which is formed the shoulder 10, and whose outer" surface. 12 is evenly and smoothly Ycurved on the are of a circle wh'ich merges directly into the inner convexl)` curved guide wall 13 of an outwardhv projectingguide. tube or horn '1.

The inner guiding' wall i3 ot' the guide tube or horn li is 'formed on the arc of a circle. so that aid wall not only merges, on curved lines. into the carved lraide surface 1:2 or' the projrrtion il, but alaomerges on a curved line into the inner wall of th hod ove-r the guiding ledge S. thereby piovidingg n continuously carving guide surface at all points for the. pull chain or equivalent fiexi ble pull element. Furthermore. tnc guide tube or horn 14 is formed as an integral part of the, porcelain bodv 1 and has a flared or bell month l5 so that the eXtreme outer edges of the tube are rounded or curved, thereby permitting the pull element to be smoothly and evenly drawn in any or all directionb Without the objectionable ier-h which is common to the action oi' man)v coni mercial forme of pall soclnitaY \l o. in order to obtain the action dem-ed. the fluide tube. 14 is preferably radial to the :wie` oi theJ body and not tangentially diallioeed.

ln order to properl)v provide l'or th'l mounting and housing of the :mitch parte. there is associated with the base block E an interior removable ilienllaiinf;A cap bloeit if?. also made of porcelain or erlniialent inenlating material. This cap block lite within the switch crnnpartment 3, and through llamedium of the connecting' screws is held in proper position upon the ,cuide project ion ll, and a correspondiner rest projet-lion IT formed at an opposite point williim the ,socket body. '.l`he structural feature oi mr portance in the cap block 16 is the formation in one edge thtreoiB of a segmental guiding .recess or groove 18 whichlis cti-extensive with and over-lies the segmental gattini;- ledge to complete the guiding mean` loi` the swinging end of the switch leve' and the pull4 element connecting therewith.

Any suitable pull switch mechanism ma;v be combined with the porcelain parta de acribed, bln" it is preferred to e1nplo a pull .switch of the general character of thai til closed in my former Patent. No. naali.` dated June 13, 1911. This kind oi' switch is shown in the drawings, and referringv een erally to the essential elements thereof. the. saine includes a pair of Spring contact plate 4 19 and 20, one of said plates 2U being conr nected by 21 with the center plug,` contact :L located in the receptacle part of the body, and the other spring contact plate .19 being connected through a line of connections 9:5: 24, 25 and 26 with one of the binding terminals 27. The other bindingr terminal 28 1s connected by a hne of conneetione` 29, 30

and 31 with the screw shell Contact within the receptacle part of the socket. Suitable connecting screws hold the various parte together in the assembled relation shown.

In addition to the Contact springs 19 and 20, the pull socket switch includes a rotatable cam element 33 and a ratchet operating mechanism having the swinging switch lever 3l to which is connected the inner end of the pull chain or equivalent flexible pull element 35. The relation of the switch lever and the pull chain element tothe various porcelain guiding elements erin referred to is plainly shown in Fig. 3 of the drawings, and it will be observed therefrom that an easy and smooth guidingimovement '1s insured for both the switch lever and the pull element So that a positive and reliable actuation of the switch is obtained without the jerkiness and catching incident to the operation of many forms of pull switches.

From the foregoing, it ia thought that the construction, action, and many ad'vanafes of the hereindesciibed impl-omarmd will no readily apparent Without further descripY tion, and it will bv understood that changes in the form propm'tion, and minor dotada of @Unstrut-tion may 'rw i'tsortr'd to without departing from the spil-it or sacrilicag any of the advantages of th(- invention.

I claim:

l. An all-porcelain pull socket ilnrlnding a porcelain body provided with an interim integral hay block and fornnd with an iuteriol' segmental guiding; lodge and an integral outward projoctillg guidi'. tube having im iznQr wall curving' intr tlm lmdjv over `will ledge, a removable porcelain Tap block seated upon the base block and having a segmental recess over said ledge, and a. souliei; Switch.

2. An all-porgelain pull socket including a poxcelain body provided with an interior integral basa block, and an interior segmental guiding' ledge and an integral outward }111oj0cting guido tulle, a removable porcelain cap block aeated upon the base block, a aockot switch housed lug-tween the two blocks, and a porselaiu cover n'lember arranged over one end of the body.

1n testimony whereof I hereunto afiix my 30 gnature in the presence of two witnesses. EDGAR H. FREEMAN.

fiaessos .fi im MARSH, Amen; A. HENRY.

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