US466290A - Jesse l - Google Patents

Description

(No Model.)

J. L. HINDS.

LAMP SOCKET.

No. 466,290. A y Patented Deo.29, 1891.

WITNEssEs:

, v NToR I y l I l] BY I /jgaf l, I V

/- ATTORNEY@ UNITED STATES- PATENT OFFICE.

JESSE L. HINDS, OF SYRACUSE, NEl/V YORK, ASSIGNOR TO THE ELECTRIC ENGINEERING AND SUPPLY COMPANY, OF SAME PLACE.

LAM P-socKl-zT.

SPECIFICATION forming part of Letters Patent N o. 466,290, dated December 29, 1891.

Y Application filed July 23,1891. Serial No. 400,500. (No model.)

To aZZ, whom it may concern:

Beit known that I, JESSE L. HINDs, of S yracuse, in the county of Onondaga, in the State of New York, have invented new nand useful Improvements in Lamp-Sockets, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exactdescription. n

My invention relates to improvements in sockets for incandescent lamps of the same -generalclass as shown in my pending applications, Serial Nos. 400,498 and 400,499, filed conjointly herewith, and has for its object the production of astrong and durable device which is economicalin manufacture and durable and efficient in use.

To this end the invention consists, essentially, in an insulator base-plate, a bracket secured to the base-plate and-formed with a lateral extension or arm having an angular opening therein, a nipple having one end formed of angular cross-section and adapted to enter said opening in the lateral arm of the bracket, with'its other end adapted to be se.- cured to thelamp for supporting the same, and to make contact with the inner lamp-collar connected to one of the lamp-terminals, a

second bracket arranged at substantially right angles to the lformer bracket, a springarm supported. on the insulator-plate and formed with a free end adapted to make contact with the outer lamp-collar connected to the other lamp-terminal, a cam for forcing said spring-arm into contact with said collar, and a spindle connected to said 'cam with a lost motion.

The invention furthermore consists in the detail construction and arrangement of the parts, all as hereinafter more particularly described, and .pointedout in the claims.

In describing myinvention reference is had to the accompanying drawings, forming a part ofthis specification, in which like letters indicate corresponding parts in all the views.

Figure l is a verticalsectional view of my improved invention. Fig. 2 is a topplan View of a portion of the adjacent extremity of the lamp adapted to be secured to said socket. Fig. 3 is an elevation of the detached inner parts of the lamp-socket, the lspring-arm being shown as in its position assumed when opening the circuit. Fig. 4 is an inverted plan view of the parts as shown at Fig. 3. Fig. 5 is a vertical sectional view taken gn line 5'5, Figgt.V Fig. 6 is a longitudinal sectional view of the top wall and the upper portion of the side wall of the outer frame of the lamp-socket. Figs. 7 and 8 are respectively isometric perspectives of the top and bottom sides of the insulator base-plate; and Figs. 9 l0, and 11 are isometric perspectives of the bracket for supporting the cam, the bracket for supporting the lamp and making contact with one of its terminals, and the spring for making Contact with the other lam p-terminal.

A'represents the outer shell of the lampsocket, consisting of the vertical or peripheral wall a and the top wall a', formed with a depending fiange a2, adapted to enter the upper extremity lof the side wall a and be secured thereto by screwsa, having their shank secured to the'iiange a? and their head passed through slots a4 in the wall a.

"B is the insulator-plate, composed, preferably, of porcelain, as the same is extremely durable and not liable to become burned or charred by continued use. As best seen at Fig. 8, the under face ot the insulatonbase is formed with recesses b, adapted to receive the inner ends of the screws a3 for'supporting said plate in position,

The lamp-supporting bracket C consists of the vertical and lateral arms C C2, is secured at one extremity C to the insulator-base B, and is provided at its opposite extremity with a nipple C3, preferably screw-threaded at its outward extremity lfor entering the screwthreaded socket d in the upper face of the lamp and making contact with the inner collar or ring d of the lamp, connected at d? to one of the lamp-terminals.

The arm C of the lamp-supporting bracket C is adapted to support a screw E, to` which is attached one extremity of a wire e, (shown by dotted lines at Fig. 5,) which passes through the central opening ci of the4 socket top wall, along a groove B in the top face of the insulator-plate B, and through a groove B3, extending upwardly from the outward extremity of said groove.

As preferably constructed, the bracket C is of its greatest width at the point where the ICO screw is attached, thus forming a broadbearing for the coiled end ofthe wire.

The upper endof the arm C of thebracket C is formed with a foot c, turned inwardly and secured to the base-plate by suitable clamps, as screws c', having their shank engaged with said foot and their head with a depressed shoulder c2, Fig. 5, of a socket b', formed in the top face of the insulator-plate B, as shown at Fig. 7.

The upper end Ctof the nipple Ci", which is preferably produced of a separate piece of metal from that composing the bracket C, is formed angular in cross-section, as best seen at Figs. 5 and 10, and is inserted in a corresponding opening c4 in the laterally-extending and substantially-horizontal arm C2 of the bracket C, being secured in position by swagiug said upper extremity C4 upon the top face of the bracket-arm C2. The outer collar di of the type of lamps adapted to be secured to this improved socket is connected at d4 to the other lamp-terminal, and, as presently described, is engaged'by a spring F. In order to prevent contact of the bracket with said collar, which in some styles of lamps is very close to the inner collar, the point of union of the bracketarms C and C2is formed with a corrugation or depression This style of bracket is particularly applicable and practical for use in sockets of this description, as the broad base carrying the wire-supportingscrew preventscontact of the extremity of said wire with adjacent partsof the socketcharged bythe opposite wire. The corrugation c5 prevents contact of the bracket with the outer lamp-collar, and the square or angular extremity of the nipple C3 enables the same to be readily secured to the bracket, and when properly swaged entirely prevents said nipple from revolution, which would be permitted if said extremity were screwed into position. Itis evident, however, that, if desired, the bracket C may be formed with two vertical arms C instead of one, as illustrated.

G represents a second bracket disposed at substantially right angles tothe frame C, and its arm G is adapted to support the retaining-screw g for the second or return wire g', adapted to pass through the central opening 0,5 of the top wall of the outer case and the grooves B and B2, corresponding to the like grooves through which the wire c passes. This bracket- G is secured in position by means of screws g2, having their shank engaged with the bracket and their head with the lower wall of a socket b2 in the top face of the insulator-base.

rlhe side of the bracket G adjacent to the bracket C is cut away at g5 in order that there may be no liability of the adjacent faces of said brackets engaging each other, since the socket would thus become short-eircuited.

G and G2 represent depending arms formed upon the bracket G and adapted to support the opposite extremities of the spindle h for carrying the cam Il, adapted to force the spring F inte contact with the ring il upon the lamp. The spring F is preferably formed U-shaped, with one arm`f mounted in a slot f in the bottom face of the insulator-base and interposed between the adjacent faces of the bracket G and the insulator-base in order that one of the screws which secures the bracket G to the base may also retain the spring in position.

The depending arm f2 of the spring F extends on the outside of the bracket-arm G and between lugs G: on said arm, adapted to prevent the spring from lateral movement. The opposite lug f3 of the U-shaped spring is disposed in substantially ahorizontal plane,

being normally forced by its spring-tension into engagement with the cani H, and is formed with the depending arm f4 and the enlarged and substantially-horizontal engaging face f, adapted to make contact with the ring d3 upon operation of the cam, and thus open the circuit from the socket through the lamp. This particularconstruction of spring is readily produced from suitable sheet metal, as phosphor-bronze, at a minimum expense, and, as previously stated, the same screw which holds the cam-supporting bracket in position also serves to hold the spring in position.

The cam Il is preferably formed with oppositely-arranged teeth 71,', adapted to cneounter the base ot the spring-arm f, and with lat sides h2 for registering with said spring-arm when the circuit is broken. On the outer face of the cam His a slot h3, within which is movable a pin orlug projecting from the spindle h and formed of less diameter than the width of the slot, in order that the spindle and cam may be connected together with a lost motion for effecting quick breaking of the circuit. The outer extremity of the cam-spindle is formed with a lug h, adapted to bear against the inner wall of the bracket-arm G2, and with the projecting end h, which enters an aperture t' in a hand-piece I and slightly projects beyond the depressed shoulder t" of a socket i?, formed n said handpiece, of greater width than the aperture L'. The extreme end of the shaft his then upset upon this shoulder, and the hand-piece, which is formed of porcelain, is firmly held in position.

My improved switch will be readily perceived from the foregoing description and upon reference to the drawings, and it is evident that the same is simple, durable, and practical.

In my aforesaid applications, Serial Nos. 400,498 and 400,499, I have shown a similar construction of spring F, bracket G, spindle 71., and hand-piece I to the one herein dcscribed; but it will be understood that I do not herein claim the specific construction of said parts.

As the detail construction and arrangement of the parts of my invention may bc somewhat changed from that shown in the draw- IOO IIO

ings, I do not herein limit myself to their spe#v cie construction and arrangement; neither do I herein claim the means for securing the hand-piece to the spindle. y

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is- A l. The combination,with an insulator-base, of a bracket G, having the depending end arms G G2 and the central arm or lug G4, a terminal carried by the arm G4, a spindle j ournaled in the arms G and G2, a cam on the spindle, a spring F, having one extremity disposed on the outside of the bracket-arm G and formed with a foot engaged with said bracket, a laterally-extending arm f2' on said spring, having a projecting bearing-.face adapted to be forced by said cam into engagement with one to engage the other lamp-terminal, and a ter? of the lamp-terminals, a bracket C, having one extremity secured to the insulator-base and the other` provided with a nipple adapted the'screw g, depending arms G and G2 on the bracket G, aspring F, having the vertical arm f2 disposed on the outside of the bracket-arm G and formed with an inwardly-extending arm secured to the insulator-base, the yielding arm f3 on the spring, formed with a depressed engaging face f5, a cam'adapted to bear against the arm f2 and engage the face f5 with the lamp-terminal, and a spindle journaled in the bracket-arms G and G2 and connected to said cam with a lost motion, substantially as set forth.

3. The combination,with the insulator-base, of a spring F, consisting of the arms ff2 and the arm 2 havin@1 the de ressed en alrinov 7 b b Z:

end f5, a bracket G, having lugs G2, a cam H, a spindle h. and a lamp-supporting bracket C, provided with a projecting spindle, substantially as described. In testimony whereof II have hereunto signed my name, in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga, in the State of New York, this 19th dayv of June, 1S91.

JESSE L. I-IINDS.

Witnesses:

' CLARK H. NORTON,

L. M. BAXTER.

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