US2495657A - Socket for receiving electric igniter plugs - Google Patents

Description

Jan. 24, 1950 A. J. KROLL ET AL SOCKET FOR RECEIVING ELECTRIC IGNITER PLUGS Filed April 5, 1949 Patented Jan. 24, 1950 UNITED STAT ES PAT ENT OFFICE SOCKET FOR RECEIVING ELECTRIC IGNITER PLUGS neeticut Application April 5, 1949. Serial No. 85,516 Y 7 Claims. (Gra ls- 3 2) y This invention relates particularly to what are commonly termed automatic lighters for cigars, cigarettes and pipes and the main object is to greatlysimplify the construction and make it more reliable.

Insuch constructions, there is a tubular socket shell which contains a thermostatic latch to be engaged by a contact flange on a plug-in igniter device, such for instance as thatshownin United States Letters Patent No. 2,338,565. These thermostatic latches have usually been provided with three symmetrically arranged arms supported by a terminal spindle.

It has been discovered that a much better effect can be produced by the use of a two-armed thermostatic device by suitably constructing and centering the parts.

Fig. .1 is a longitudinal sectional view. of a socket'embodying the invention intended to re- -ceive:an'igniter plug, on the plane of thel'ine l-I of Fig. 2'.

Fig. 2 is a front. end view of the socket of Fig. 1.

Fig. 3 is a transverse sectional view taken on the plane of the line 3-3 of Fig. 1.

Fig. 4is a sectional view of the supporting disc of Fi s. 1 and 3, the section being taken on the plane'of the line 44 of Fig. 3. i

Fig. 5 is a face view of an insulating spacer.

Fig. 6 is a cross-sectional view of the washer of Fig. 5, the section being taken on the plane of the line 6-6 of Fig. 5.

Fig. 7 is a side view showing the spindle and with the switch contacts in section.

Fig. Sis a front View of the parts shown in Fig. 7.

Fig. 9 is a longitudinal sectional view of one end of the socket, the section being taken on the plane of the line 9-9 of Fig. 1.

Fig. 1-0.is a perspective view of the thermostatic latchmemben.

Fig. 11 is a perspective view of the base contact.

The shell [2 of the socket is cylindrical and adapted to be supported in a hole in an instrument board (not shown) and constitutes the grounded side. of. the switch circuit. The .open front end has a flange I3 which abuts against the front of the board in the usual manner. The inner end has a transverse wall [4.

The thermostatic latch which constitutes the inner switch contact is formed of a single strip of resilient bimetal having only two arms l5, l5 connected by elbows l6, IE to a raised cross piece IT.

The tips 3 of the latch arms are inclined outspindle from the wall and the disc 21.

wardly and concaved towardthe axis of the shell so-as, to, center the contact rim of the plug (not shown). C

The base contact .has two feet l9; l9,1a' depressed center20 and two projecting lugs 2|, 21. The width of the depressed portion across" the lug sis approximately equal to 'the'width of the cross piece l-l between theelbows l6; l6 so as to center the latch and base contact when they are assembled on the spindle 22 between collar 23 and washer 2t and secured by riveting the end 25. To permit the use of a latch of maximum overall diameterthe shell is cut away at 26, 26.

For simplicity in manufacture, accuracy of assembly and reliability in operation, the latch must'be perfectly centered in the shell. This is assured; by the arrangement herein set forth whereby the spindle is centered at one end in the rear wall [4 and near'the other end by a metallic disc 21 which fitsthe inside of the shell. This discll has notches 28, 28 in its opposite edges which mesh with indented-projections 29 in the shell. A cylinder or layer of insulating material 30 surrounds the spindle 22 and thus spaces the An insulating spider 3| ismounted on the spindle between disc 21 and the base contact 20 and has notches 32 which receive lugs 33 which project from the disc, and the lugs 21 on the base contact. Thedisc 21 has perforations 34 to ensure clearance for the lugs 2|, 2| when the parts are assembled. A spacer tube or eyelet 35 surrounds the insulator .30 between the wall l4 and the disc 2'1 so as toaccurately position the disc when the nut, 36 is tightened against the spring washer 3! andthemsulating washer 38. This latter washer is centered in a recess 39' concentric with the spindle.

By means of this improvement, the construct1on has been greatly simplified and the cost reduced below the cost of sockets with the conventional three-arm thermostaticdevices, the parts being fewer and accurately formed and assembled. There is lesslikelihood of errors in assembly.

We claim: l. A socket for anelectric igniter comprising a shell having a transverse rear "wall and a side Wall, a metallic centering disc within said shell and having parts interlocking with the side wall for preventing relative rotation and having projections, a spindle passing through said rear wall and said disc, means for insulating said spindle from said disc and said rear wall, a spacer on said spindle between said disc and said rear wall, contact means carried by said spindle and ineluding a two-armed thermostatic latch and having projecting lugs and an insulating spider on said spindle between said contact means and said disc, said spider having notches arranged to receive projections on said disc on one side and notches arranged to receive projections on said contact means at the other side.

2. A socket for an igniter plug comprising a shell open in the front end and having a transverse wall at the rear end and a side wall, a metallic disc in the shell spaced inwardly from said rear wall, said side wall and disc having intermeshing parts to prevent relative rotation, a central spindle extending through said end wall and said disc, means for insulating said spindle from said shell, tubular means for spacing said disc from said end wall, means for removably clamping said spindle to said Wall, a two-armed latch member extending across the center of said shell, said latch being mounted on said spindle and means for insulating said latch from said disc, the end of the spindle being riveted to hold the latch in place.

3. A socket for an igniter plug comprising a shell open in the front end and having a transverse wall at the rear end and a side wall, a metallic disc in the shell spaced inwardly from said rear wall, said side wall and disc having intermeshing parts to prevent relative rotation, a central spindle extending through said end wall and said disc, means for insulating said spindle from said shell, tubular means for spacing said disc from said end wall, means for removably clamping said spindle to said wall, an abutment having two feet, a two-armed latch member extending across the center of said abutment, said latch and abutment being mounted on said spindle adjacent its inner end and an insulating spider interlocked with said abutment and said disc, the end of the spindle being riveted at the end to hold the abutment and latch in place.

4. In a socket shell for an igniter plug having a rear wall and a side wall, a latch member having a cross piece with two extending arms connected by bent elbows to the ends of the cross piece, said side wall having clearance openings adjacent said arms, an abutment member extending behind and transversely of the cross piece of the latch member and having lateral lugs, a spindle supported at one end in said rear wall and supporting said latch member and said abutment member, a disc on said spindle intermeshing with said side wall for supporting said spindle at a point inwardly of the rear wall,

projecting lugs on said disc, an insulating spider,

said spider having slots interlocking with the lugs on said abutment member and with the lugs on said disc and means for insulating said spindle from said disc.

5. As an article of manufacture, a socket shell for an igniter plug having a rear wall and a side wall, a latch member having a cross piece with two extending arms connected by bent e1- bows to the ends of the cross piece, an abutment member extending behind and transversely of the cross piece of the latch member and having two feet and lateral lugs, a spindle supported at 4 one end in said rear wall and supporting said latch member and said abutment member, a disc on said spindle inside the shell and intermeshing with said side wall, projecting lugs on said disc, and an insulating spider having slots interlockingwith the lugs on said abutment member and with the lugs of said disc and preventing relative rotation of the parts.

6. A socket for an electric igniter plug comprising a shell having a rear wall with a central opening and a cylindrical side wall with in-l turned projections, a plug latching unit mounted in the bottom of said shell, said unit including a screw-threaded stem extending through the opening in the rear wall to the inside of the shell and insulated therefrom, an abutment contact on the stem adjacent its inner end for limiting inward movement of the plug a two-armed latch member supported by the stem inwardly of the abutment contact for latching a plug in the socket, a metallic disc supported on the stem adjacent the abutment contact and having notches in its periphery interlocking with the projections on the side wall of the shell for supporting the latching unit adjacent the abutment contact, means for insulating said disc from said stem and spacing said disc from said rear wall, and a nut 0n the stem outside of the rear wall for securing the unit to the rear wall.

'7. A socket for an igniter plug comprising a tubular shell having a transverse rear wall, a central screw-threaded spindle mounted in said wall and extending into said shell, a metallic centering disc mounted on said spindle, said shell and disc having parts which interlock with each other to prevent relative rotation and to support the spindle inwardly of the rear wall, a spacer tube on said spindlebetween said disc and said wall, means for electrically insulating said disc from said spindle, said means including an insulating washer interlocked with said disc onsaid spindle, a base contact having two spaced feet mounted on said spindle, said contact and said washer having parts which interlock with each other to prevent relative rotation and a bimetal latch strip mounted on said spindle and having two arms arranged at 90 to the feet of said base contact and a nut on said spindle-clamping said spindle and its attached parts to the rear wall of the shell.

ALFRED J. KROLL. HENRY W. BILGER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,128,016 Sinko Aug. 23, 1938 2,129,792 Sinko Sept. 13, 1938 2,135,270 Ashton et a1. Nov. 1, 1938 2,236,483 Bahr Mar. 25, 1941 2,267,011 Ashton Dec; 23, 1941 2,326,333 Cohen Aug. 10, 1943 2,338,565 Ashton et a1. Jan. 4, 1944

Images