US1774461A - Incandescent lamp socket - Google Patents

Description

Aug. 26, 1930. o. H. VAN AMBURG INCANDESCENT LAMP SOCKET Filed July 29, 1922 Figi.

Patented Aug. 26, 193i) Unirse;

was

ewa-ier orro H. van AMBURG, vror@ Bnrnferonfr; connno'rrcnr; seremos To GENERAL ELEC- TRIO COMPANY, CORORATON OFv NEXV YORK INCNDESCENT-'LAMP SOGKE'JI Appncaem inea my 29,

insulating materialinste'ad of sheetp-metal.`

, During recent years the snap connection between the cappand body portions of thef metal shells of sockets has displaced almost 10 entirely the prior constructions which required the use of a screw driver or other toolk for their connection and disconnection. In porcelain sockets the old ycumbersome connections between cap or base and body parts have 1.51 persisted despite many attempts to providel satisfactory snap or manually operatedconnections therefor.

2o portion may bey connected and disconnected withl facility to thecap portion by mere ma-y nipulation, and when the parts are-in connected position they 'will be,- securely held against relative *movement and accidental .25 displacement. l 1

@ne embodiment-'of inthe accompanying drawing in which Fig. 1 is a side elevation of my improved socket; Fig. 2 is an under side view of the cap or base portion; Fig. 3 .is a top view of the body portion, and Fig. -1 is an enlarged vertical section of the upper' part of the socket. Y

The cap or top portion l and the body portion 2 have the general construction of the A porcelain sockets heretofore in use.

The cap or top portion l is formed with a plain lower surface'bounded by a. peripheral drip liange 3, a central aperture t and' chamber 5 for the usual knotted conductor wires, and binding plates secured in arcuate recesses on opposite sides of the chamber 5.

The body portion 2 has in a recessin its lower end the usual center and screw shell contacts for engagement with the base of an incandescent lamp and in a recess in its upper end anordinary switch mechanism compris-V ing a key shaft 7 journalled in a yoke'8 connected by an axial screw with the center contact, and having on its inner end an oblong block 9 normally engaging a flat spring conthe rinvention isshown' 1er-:2. "sensi Ne. 578,313.

tact l0, the free-end of which is adapted to engage a contact toe ll projecting horizontally yfrom a U-shaped or overhanging connection bracket l2 secured to the end of the body portion onone side of the key shaft 7, while on the opposite side thereof a second connection bracket lis secured by a screw having electrical connection withy the screw shell contact.- l v `ln order that the body portion 2 may bereadily connected to and.disconnectedfrom the 'cap ortop portion l by asimple manipulation',V I provide the binding plates G with. yielding connection hooks 14, made of spring metal, such as phosphor bronze, and shaped as indicated in F ig. 4 with inclined outer ends adapted, upon being broughtfby a slight any*The object of my invention is to provide any improved porcelain socket in whichthe body.y

gular inovementv into vengagement with the outturned ends of the connection brackets 12 'and 13to yield sufficiently to insure good springcontact at both points of connection and also to pern'iit the porcelain'surfaces at the meeting ends of the socket members to slide upon each-'other without-interference from the sharp particles common to such surfaces or from irregularities of manufacture.

Gn account of the tendency of the socket members to creep or work loose underv mechanicaly vibrations, alternating current im-Y pulses and unequal expansion and contraction between porcelain and metal parts, I provide` a positive lock between the .bodyfportioii 2Vr and the cap or top portion l consisting of a latch l5 in the form of a phosphor bronze leaf spring secured by a screw lGat its inner end in a parallel sided radial recess 17 formed in the lower end of the cap or top portion and extending downwardly and outwardly therefrom to a point somewhat below the end planeV of the cap or top and then bent upwardly and inwardly so that while its' rfree end is positioned between and guided by the parallel walls of the recess the bent portion will be disposed slightly outside the pcriphery'of thev cap or top whereits surface is roughened to permit of its being, readily engagedby the finger of the wireman. The body portion 2" is provided in its upper end with a shouldered notch 18 into which the spring latch l5 snaps when the socket portions have been rotated relatively to each other to fully connect their engaging means.

When the wireman desires to install my socket, he presses upwardly with h is thumb on the exposed portion of the latch 15 and gives the body portion 2 a slight rotary movement relative to the cap or top portion l to disconnect the brackets 12 and 13 trom the spring hooks 14. Upon removal ot the body portion the conductors are threaded through the central aperture d of the cap or top portion, a. knot tied in them and their ends secured to the exposed binding plates G. 'l he body portion is replaced and rotated until the latch 15 snaps home in the notch 1S.

While I have shown and described the best embodiment ot' the invention known to me, I do not desire to be restricted thereto.

lVhat I claim as new and desire tov secure by Letters Patent of the United States, is

1. A separable socket comprising insulating cap and body portions, members mounted on said portions movable to interlock the cap and body, a latch keeping notch in one of said portions, a U-shaped spring latch detachably mounted Within the other portion and normally extending into said notch to prevent unlocking movement of the cap and body, and means carried by the latch and extending outside the socket operable to Withdraw the latch from the notch.

2. A separable socket comprising insulating cap, and body portions, members mounted on said-portions movable to interlock the cap 1; and body, a latch keeping notch in one of said portions, a U-shaped spring latch mounted Within the other portion and normally eX- tending into said notch to prevent unlocking movement ot the cap and body, and means carried by the latch aud extending outside the socket operable to Withdraw the latch from the notch.

3. A lamp socket comprising a moulded body portion lhaving lamp receivin contacts at one end, a cap portion fitting the oppositie end of said body, means i'or interlocking said cap and body, a latch keeping recess in one ot' said portions extending to the outside oit said portion, means for interlocking said cap and body, and a U-shaped spring mounted in said recess, having a handle extending to the outside of said portion and having a latching engagement with the other portion to prevent its rotation.

4. A lamp socket comprising moulded body and cap portions, interlocking conducting members carried by adjacent ends'ot the body and cap portions adapted to be connected by a longitudinal and rotary increment, one oi said portions having a recess in theend adjacent the other portion, the latter portion .having a latch engaging notch, and a snap latch member mounted in said recess and adapted to engage the notch in the otherportion when the conducting members are interloeked, and

said latch member having an operating handle extending to the outside of the socket.

5. In a lamp socket having a top portion and an independent body portion of insulating material directly engaging each other, the combination of metal brackets mounted on one of said portions, cooperating yieldable hooks mounted on the other ot said portions and adapted to engage said brackets upon one of said portions being moved angularly to the other about their longitudinal axis, and

an insulated spring latch tor relcasably preventing retrograde m-oven'icnt between said portions.

6. In a lamp socket having a top portion and an independent body portion otinsulating material directly engaging each other, the combi-nation of binding plates attached to said top portion and provided with spring hooks, contact brackets mounted on said body porf tion andengageahle with said spring hooks upon slight angular movement ot said portions relativeV to each other about their-,longitudinal axis, and an insulated spring latch for releasably preventing retrograde,movement between said portions.

7. In a lamp socket having a top portion and anindependent body portion of insulating material directly engaging each other, the combination of interengageable yielding mean for connect-ing said members upon slight angular movement of one relative to the other about their longitudinal axis,`sa id top portionhaving a radial parallel sided recess adjacent the` periphery thereoisaid body portion having a notch adjacent one end thereof, and a bent spring latch secured to said top portion and projecting through said recess and adapted to snap into said not-eh upon completion ot said relative angular movement of said portions.

In Witness whereof I have hereunto set my hand this 22d day oi July, 1929..

OTTO H. VAN AMBURG.

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