US987152A

US987152A - Lamp-socket.

Info

Publication number: US987152A
Application number: US50050209A
Authority: US
Inventors: Norman Marshall
Original assignee: Arrow Electric Co
Current assignee: Arrow Electric Co
Priority date: 1909-06-07
Filing date: 1909-06-07
Publication date: 1911-03-21
Anticipated expiration: 1928-03-21

Description

N. MARSHALL.

LAMP SOCKET.

APPLICATION FILED JUNE 7, 1909.

987,152, Patented Mar.21,1911.'

IN VEN TOR.

A TTORNE Y.

7,5 W M V Unrrnn s ln'igns a rnntr OFFICE.

NORMAN MARSHALL, 0F NEWTON, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO ARROW ELECTRIC COMPANY, OF HARTFORD, CONNECTICUT, A CORPO- RATION OF CONNECTICUT.

LAMP-SOCKET.

Specification of Letters Patent. Patented lvlar, 21, 191 1,

Application fi led June 7, 1909. Serial No. 500,502.

Sockets; and I do hereby declare the follow- 7 ing to be a full, clear, and exact (lGSCIlPlJlOIL of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to incandescent lamp sockets, and more particularly to that class of sockets known as pull sockets.

The object of the invention is to provide.

an improved and novel construction of socket in which the switch mechanism is operated to complete and break the circuit by alternating pulls upon an operating cord depending from the socket.

To these ends the invention consists in the features of construction and combinations of parts hereinafter described and set forth in the claims. c p v p The various features of the invention Wlll be readily understood from an inspection of the accompanying drawings; in which- 7 Figure 1 is a vertical sectional view through the porcelain base of a pull socket embodying certain features of the invention; Fig. 2 is an end View of one of the sectional base blocks with certainparts of the switch mechanismremoved; Fig. 3 is a similar view showing certain parts of the switch to form a chamber within which the switch mechanism is housed and effectively insulated. Thelamp terminals are secured upon the outer end of the block 15, and comprise a screw shell 19 and acenter contact piece 20. The flange of the screw shell is sepa rated from the block 15 by an interposed washer 21 of fiber or other suitable insulating material which efiectively insulates the shell from the metallic parts carried by the block 15. The outer end of the block 15 is provided with a cylindrical boss 22 which fits within the cylindrical opening in the flange of the screw shell and serves to center the shell on the block. The shell is securedin position upon the block by means of a screw 23 which asses through a hole in the flange of the s ell and is th readed into a plate 24 which engages the inner surface of the flange. The plate 24 extends outward through a slot in the shell, and is bent at right angles'so that its outer end lies within a peripheral recess 25 formed in the block '15'." The outer end of the plate 2 1 is provided with a binding screw 26 to which one'off the conductor wires may be connected, the wire extending through peripheral recesses 27 formed in the

blocks

15 and 16.

The centercontact piece 20 is secured in position on the end of theboss 22 by means of a screw bolt 28 which passes through the base blocks 15 and'16, and is provided at its outer end with a nut 29. This bolt acts to bind the base blocks together. and also acts as the pivotal support for the switch mechanism as Well as acting to hold the center contactin position. A disk 30 of insulating material is interposed between the base of the center contact piece 20 and the end of the boss 22, and the boss is of such thickness thatthis disk assists in retaining the screw shell in position on the end of the block 15. The disk 30 also effectively in" sulates the center contact from the screw shell. The center contact piece .is held from turning under the head of the bolt 28 by an inwardly projecting finger 31 formed at its end and arranged to pass through a hole in portion 37. The plate is secure ing through which .theuterminal end of .the

center contact Fig. 1. I

The recess 17 in theblock 1s provlded at its inner end with an annulargroove 33 the bottom of which is provided with two piece passes, as indicated-in inclines terminating in abrupt axially ex-i tending'shoulders 34 and 35. A segmental contact plate,36. isarranged upon. onecof,

the inclines at the bottom of the groove 30, and is provided with .a radially extending in position by means of ascrew 38 which passesthrough the block 15, as indicated in Fig. -6, and: is threaded into a wire terminal plate 39 WlllCll overlies the part 37 of the contact plate and clamps the platein position; The outer end is provided, with a binding which the other conductor wire may be con-:

the circuit comprises aswitch of, the plate 39 extends at'an angle to the part with which the screw 38' engages, and is arranged in a peripheral recess 40 formed in theblock 15. The outer end of the plate screw 41 by nectedwith the socket; v a

The mechanism .for makingand breaking plate 42 mounted to turn upon the bolt 28 and provided with a segmental spring finger 43 ar-' rangedto travel around within the. annular groove 33. The plate42 is slit circumferentially, and the slitted portions bent downward in Fi tions 44 in The switch plate may be given a half revo- 1' 1 to form two teethor projecicated in dotted lines in Fig. 3.

lution to ma e or break the circuit by means of an oscillatory actuator disk 45 which. is mounted to turn upon the bolt 28,- and may 'be moved in one direction by a pull chain or cord 46,- and moved in the other direction, by

a spring 47. The actuator disk is formed from vulcanized fiber or other suitable insulating material, andis provided with aradially extending stop finger 48 which is normally,

held against a shoulder 49 in the wall of the recess 17 by the spring 47. The actuator disk 45 is provided with aclutch plate 50 secured upon its upper side in Fig. 1, and

provided" with shoul ers 51 arranged to engage the teeth or projections 44 on the and bent over against thecor .or chain-carrying groove. This annular groove flange isqsecured to the actuator d1skby means of projecting fingers which pass through slots formedin the periphery .ofthedisk-andhavetheir ends bent over against the opposite side of the disk, the flange being so" connected with the disk that it is efi'ectivel plate by the isk. The annular flange is provided with a finger 53 (Fi 4) arranged to lie between two adjacent bafis of the chain 46 and connect the end of the chain to the actuator, disk. This enables the end of the chain to be readily connected or disconnected from the actuator-disk after the arts have been assembled, the abutting en s of the

blocks

15 and 16 being recessed at 54' to providean o ening through which access may be had to tlie groove flange at the point where the retaining finger 53 is located. The actuator chain wraps around the groove flange of the actuator disk and passes out through a guide assage 55 formed by r0 erly recessing t e abutting ends of the bloc s15 and 16, and through a guide tube 56 formin a continuation of the passage and exten ing through. the inclosing shell of the socket.

I In the construction shown the guide tube 56 isso connected with the base of the socket that it may be readily disconnected for the purpose of refinishing, or whenever it is desired to remove the tube for anypurpose. As shown, the innerv end of the tube is threaded in a nut 57 which is securely held in an annular grooveformed in the walls of the recess 55. This construction enables the nut to be readily positioned in assembling the parts, and to be securely held in position against rotation after the parts are assem-- bled, and this construction forms one feature of the invention. In the form of socket shown, the

recesses

17 and 18 are formed eccentrically in the ends of the blocks 15, and this construction is preferred for the reason that it provides a thicker wall for the insulating chamber at the side where the nut 57 is located.

Assuming that the parts are in the position indicated in the drawings, the finger 43 of the switch plate 'will lie in engagement with the contact piece 36,'and electrical connection will be made from the wire terminal 41 through the switch mechanism to the center contact 20. By pulling on the cord insulated from the clutch 46 the actuator plate may, be rotated until v the stop finger 48 brin s up a ainst a stop 58 formed in the wall o f the re c ess 17. The

cause

stop shoulders

49 and 58 are soarrangcd incline at the inner end of the annular groove 38. il hislquickly breaks the circuit,

so that there is no electrical connection =between the wire terminal 41 and the centercontact 20. When the cord 46 is released, the spring 47 immediately returns the actuator dlsk to the normal position indicated in Fig. 3. During this movement the clutch plate rides over the projections 44, the spring yielding to allow the relative axial movement between the clutch plate and contact plate. When the actuator cord or chain is again pulled, the switch plate is given another half revolution to bring the parts into the position indicated in the drawings, and thus a ain complete the circuit.

Whi c it is preferred to employ the specific construction and arrangement. of parts shown and described, it will be understood that this construction and arrangement is not essential to the invention except so far as it is specified in the claims, and may be modified and varied without departing from the broader features of the invention.

Having explained the nature and object of the invention, and specifically described one of the forms in which it-may beembodied, what I claim is I 1. An incandescent lamp socket comprising a porcelain base, a pull switch mechanism mounted inthe base, a nut secured in the base, anda guide tube for a ull cord screwed into the nut, substantial y as described. v

2. An. incandescent lamp socket comprising two cylindrical base blocks, a pull switch mechanism mounted between the blocks, recesses in the opposing faces of the Blocks for receiving a nut, a nut held in said recesses between the blocks, and a guide tube for a pull cord screwed into the nut, substantially as described.

3. An incandescent lamp socket comprising two base blocks having abutting faces recessed to form an insulatin her, an annular groove at the end 0 one of the recesses, a segmental contact plate arranged along the inner end of the annular groove, a rotary switch plate provided, with a finger adapted to travel along said groove prising. two cylindrical chamin contactv withlits inner end, shoulders .on

said contact plate, a clutchplate provided with cotiperating shoulders, an insulating disk carrying the clutch vplate and provided with "grooved ii d Pull (rd 0011- f i l in c i Substantially B esorihed.

nected :to

- 4. An, incandescent ,rlamp J com :pmsmg two cylindrical ibase iblocks :having.

abutting faces recessed to form an insulating chamber, lamp' -terminals upon lone lofjithe blocks, a pgll switch mechanism arranged in i i h ii a iprovi' -w it a sto nger 48 a spring or actuating the disk in one direction, a pull cord for actuating the'disk in the opposite direction, and shoulders 49 and 58 formed in the recess of one of the blocks for determing the movements of the actuator disk, substantially as described.

5. An incandescent lamp socket comprising two cylindrical base blocks having a-buttin faces recessed to form an insulating pa leading from the chamber, a ull switc mechanism mounted in the cham r, a nut held between the blocks with its bore in register with said passage, and a guide tube for a pull cord screwed into the nut, substantially as described.

6:An incandescent lamp socket comprising two cylindrical base blocks having abutting faces eccentrically recessed to form an insulating chamber-and also recessed to forma passage through the thicker wall of the chamber and a transverse oove in the wall of the-passage, a nut held n the groove, a tube fora pull cord screwedinto the nut, and a switch mechanism within the chamber adapted to be operated by a cord extending through the aide tube and passage, sub stantially as escribed.

7 An incandescent lamp socket combase blocks having abuttin faces 1- to form an insulatin 0 amber, lamp terminals upon one of the locks a ull switch mechanism ar ranged within the chamber, and a screw bolt for securing the base blocks together and upon which the switch mechanism is oper-' provided with a flange having-a cylindrical opening fitting about the insulating disk interposed between the base and'flange ofthe shell, and a center coiitact mounted upon the end of the boss and provlded with an inwardly projecting finger-enteri recess in the end of the boss, substantia y as described.

comprising an actuator diskamber and also recessed to form a the shell QL-An incandescent-lamp ;socket c'orntently advancing the switch plate, a pull prising two base blocks having abutting cord connected to move the actuator in one faces recessed to-.-form-an insulating cham dlrection, and a spring for returnm the beryan annular groove at the end of one of actuator to normal position, substantia 1y as 15 5. the-recesses-provided-with"inclined surfaces described.

at its inner end, a segmental contact plate In testimony whereof I afiix my signalarranged along one. of said surfaces, a roture, in presenceof-two witnesses. tary switch-plateprovided witha segmental NORMAN MARSHALL. finger adapted to travel around said groove Witnesses: a H) in contact with the incline, an actuatorar- WARREN G. OGDEN, ranged withinthe chamber for intermit- N. D. McPrLAIL.