US1658599A - Lamp socket - Google Patents

Description

Feb. 7, 1928. 1,658599 J. HOHL LAMP SOGKE'I' Filed Nov. 21. 1922 x A TTORNE Y Patented Feb. 7, 1928.

UNITED STATES PATENT OFFICE.

JOHN KOHL, OF NEWARK, NEW JERSEY, ASSIG1\TOR T MOLDED SOGKET CORIPORA- TIOZN', A CORPORATION OIE NEW JERSEY.

LAMIE SOCKET.

Application filed November 21, 1922. S.erial N0. 602,323. I

This invention relates to electric lamp sockets of the type composed of separable body and cap portions, and has for its object to prmide simple positive means for 6 locking the body and cap portions in assembled relation while permitting speedy disassembly when desired.

Fig. 1 is a longitudinal section on the line 1-1 of Fig. 2 showing the Parts in assenr- 10 bled relation.

Fig. 2 is a plan view? of the body p0rt1on, the cap being removed.

Fig. 3 is a view showing the inter1or cf the c ap member.

Fig. 4 is a section of the body portwn only taken on the line 4-4 of Fig. 2, and

Fig. 5 is a perspective view of the lock1ng mechanism.

The socket consists in general of a cap 6 20 and a separate body 7 of suitable insulating material. The cap 6 has the usual central aperture 11 to accommodate the end of a lamp cord, the individual conductors of which may be secured by binding screws 12 26 to two oppositely disposed hook shaped terminals 13 which are held in place within the cap as by screws 14.

Molded within the neck portion of the body is a metal screw shell or eontact 8 adapted. to 'receive a lamp or attachment plug, while a central contact 9 i's also provided as is usual. The meeting edges of the cap and body are grooved as at to provide mutually engaging shoulders wh1ch prevent relative translational movement when the parts are assembled. 011 oppos1te sides of the face ofthe body are two yoke shaped contacts 15 ancl-l6. Yoke 15 is hold in place and connected to serew shell 8 b y two screws 17 (Fig. 4) while yoke 1 6 1s held against a spring contact 18 set 1n a shallow recess on the face of the body by' two screws 19 whose heads are countersunk so as to be insulated from the lamp contacts. The relative position of the yokes 15 and 16 on the body and hooks 13 on the cap is such as to permit the parts to be assemblerl by bringing them together with the fi'ee portions of the Yokes just to the left of the downwardly bent toes 20 of hooks 18'. A clockwise turn of the body relative to the cap will then cause each hook to ride under and engagethe lower surfaoe of the free portion of its adjacent-yoke, and the parts Wlll be firmly held in assembled relation.

In order that the cap and body xnay not be accidentally disassembled, 1 notch the .lock the yoke and hook in engagernent I provide a catch 23 which is normally hold within the notch 220f yoke 15 by a spring momber 24. This spring may be of any suitable type but most desuably comprises a bow portion 25 terminating in two feet 26. These feet are of the same shape as the feet 27 cf yoke 15, and each has a hole regis'tering with the tapped hole in the corresponding foot 27 which accommodates one of the fastening screws 17. The face of the body of the socket is recessed near one edge to receive the bow ortion 25 0f spring 24. The back or web portion of yoke 15 is cut awziy (see Fig. 5) to permi't the passage therethrough of an arm 28 extencling invvardly frorn the outer end of bow 25. Catch 23 is most conveniently formed integral wit-h its oarrying spring 24 by turning upwairlly the inner end of arm 28 thereof, and then bending outwardly one edge of the upturned portion, as shown in Fig. 5. The spring and catch are secured to the body beneath the foot of yoke 15 by the same sorews 17 which hold yoke 15.

The ends 20 of hooks 13 are rounded, so that as the body is rotated relative to the cap in assembling the parts the inner edge of the hook end 20 will engage the outer vertical edge of catch 23 to graclually force the catch inward until hook notch 21 registers With yoke notch 22 at which time spring 24 snaps the catch into the notches and locks the parts against further rotation. In ordei to permit removal of the body from the cap after the arts have been once assembled, I fasten a button 29 to the outer arm of bow 25 of spring 24, and provide a slot 30 in the body through which the button extends. Thus by pressure on button 29 the catch may be moved inwardly out of the notches 21 and 22 in the hook and yoke, and the body may then be separated f'1om the cap by counter-clockwise rotation relative thereto.

Frorn the foregoing it is obvious that screw shell 8 is in electrical contact with one conductor 0f the lan'1p' cord when the parts are assembled, the circuit being aced'through a binding screw 12, hook 13, yoke 15 and screws 17. Yoke 16 is similarly c0nnected to the other conduetor 0f the lamp cord. Center lamp contact 9 may loe pennanently -connected to yoke 16, laut preferably I interpose a switch of any suicable. type between these parts.- In the present embodiment I provicle a cup shaped depression in the face 0f the Socket body to house the switch, which is 0f the simple snap type. Along the bottom of the depressiori and extending up one side thereof is a double spring contact 31 (Fig. 1) which is held in place and connected Co central contact 9 by a screw 32. T0 the same screw I secure a U-shaped bracket 33. Journalled in saicl bracket is a stem 34 carrying at its inner end a rectangular conducting block 35 and ab its outer end a key 36, b0th secured for rotation with said stern. When the switch is in its ofi position (shown in the drawings) the concave end of block 35 rests on the lower bow 0f spring contact 31, whose pressure is suflicient to prevent rattling. T0 turn on the switch, the key is turned.th1*ough a right angle, at which time block 35 connects the upper bow of s ring contact 31 to spring 18 and thus comp etes the connection between center lamp contact 9 and one conductor of the lamp cord. In this position also the pressure of the concact sprin s on block 35 prevents rattling of the switc My invention thus providdas a two part lamp sooket of insulating material to which all the conducting parts are secured, and which may be easily and quickly assembled, the cap may be quickly removed from the body to connect a lamp cord or for any other purpose, but when secured to the booly is positively locked against accidental separation therefrom. VVhile I have described one specific embodiment of the invention in detail, it is t o be understood that this is merely for the sake of clearness and not to limit the scope of the invention as defined. by the appencled claims.

I claim:

1. A lamp socket comprising a cap hav ing two circumferentially extencling hooklike conducting 1nembers, a body having cooperating hook-like conducting members adapted to be assemblcd With the cap loy a longitudinal and rotary move1nent 0f the body with respect to the cap, a screw so'cket electrically connectecl to one of the latter mentioned hooklike rnembers, a center lamp contact, a double spring contact having one part electrically connectecl (o S21ld Center la1np contwtb, a contaci dispose l opposite another part of said double spring contact and connected to the other of said latter mentioned hook-like members and a rotatable switch member coacting with said double spring contact ancl said opposite contact.

2. In a lan1p socket the cornbination-with an insulat-ing cap containin two s mmetrically disposecl notched meta lic hoo s, of an insulating body having two metallic yokes adapted to be rotated into engagement with said hooks, one of said yokes having a notch in registry with the hook notch when said parts are in engagement, a catch arranged to enter said notches to lock the parts in engagement, a spring to press the catch into the notches, and a button extending without the socket to move the catch out of the notches t0 permit disengagement of the parts.

' 3. In a lamp socket, the combination with an insulating capcontaining two oppositely disposecl notched conducting hooks, of an insulating body having at one end a screw contact and a central contact to cooperate with a larnp and at the opposite end being cupped out to receive spring contacts and a "switch 1nernber, a yoke shaped contact securecl to the face of the body and connected to one 01 said lamp contacts, the free portion of said yoke being ada ted to interlock with either of said ca'p hoo lis to fasten together the bocly and the cap and havin a notch 'to register with the hook notch w en interlocked with the hook, a spring secured in a recess on the face of the body beneath said yoke contact, a catch pressed by the spring into said yoke and hook notches to prevent disengagement of the yoke and hook, and 21 button operable from the exterior of the socket to release said catch.

4. An electric socket comprising a body portion and a cap portion having pairs of interlocking memloers, one pair extending circurnferentially and shiftable into eiieotive engagement after the cap portion has been placed 0n the body portion-and rotated, a bolt slidable relative t0 said body engaging two of said interlocking members to lock them against relative shifting to ineffective position, to permit separation of the cap portio n and body portion, and manually operable rneans for shifting said holt.

An electric socket comprising a body portion und a cap portion having pairs of interlocking members, one pair extending circumferentially and shiftalole into eflective engagement after the cap portion has been placed on the body portion and rotated, a bolt carried b y the bocly ancl sliclable relative to said members engaging two of saicl interlocking rne1nloers to lock them against relative shifting to inefi'ectivc posiytion, to permit Separation of the cap portion and body Portion, and manually oporable means for shifting said bolt.

6. An electric Socket-comprising a body ortion anda cap Portion having pairs of mterl0cking members, one air extendi ng circumferentially and shiftab?e into efi'ective 5 engagement after the cap portion has been placed on the body port1on and rotate'd, a springpressed holt slidable relative to said said holt.

JOHN HOHL.

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