US1537577A - Electrical ignition device - Google Patents

Description

' May 12, 1925.

J. BERG ELECTRICAL IGNITIYON DEVICE 1923 2 Sheets-Sheet l Filed April 2l May 12, 1925.

J. BERG ELECTRICAL IGNITION DEVICE 2 Sheets-Sheet 2 Filed April 2l, 1923 e i, 4%@ 'j H ticular arrangement shown', as it ma Patented May l2, 1925.

UNITED STATES lroma Bane, or CHICAGO, ILLINOIS, AssrGNon'To METAL sPEoIaLTIEs MANUFAo'rUn-- PATENT OFFICE.

` ING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

ELECTRICAL IGNITION DEVICE.

application inea apra 21, 192s. serial ne. 633,800.

To all whom it may concern:

Be it known that I, JOHN BERG, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Electrical Ignition Devices, of which the following isa specification.

My invention relates, morer particularly, to electrical ignition devices of the type generally used in electric cigar-lighters; and my object, generally stated, is to provide improvements in devices of this character to the end that they will Jfunction in a highly desirable manner, be simple and of relatively inexpensive construction, and maintained in suiiiciently cool condition to permit of the ready handling of the Ysame without danger of burning the operator.

I have illustrated my improvement, as embodied in a device forming one of the elements of an electrical cigar-lighter involving the' use of an electric reel and containing features for which I am making separate application for patent. However, I do not wish to be understood as intending to limit my invention to its incorporation in the pag'- e used in various other arrangements wit out departing from the spirit of the invention.

Referring to the accompanying drawings:

Figure 1 is a view in side elevation of the electric cigar-lighter referred to, certain parts thereof bein shown broken awayand in section, the device being shown as secured in an aperture of the instrument boardof an automobile. Figure 2 is a broken, enlarged, sectional view of certain of the parts shown in Fig. l 1, the electrical ignition device thereof, and to improvements in which my present invention relates, being shown in disassembled, yet related, position to the jack] which carries it, the section being takenat the line 2 on Fig. 3 and viewed in the direction of the arrow. Figure 3 is a plan view of the jack of Fig. 2, with the case or shell thereof shown in section. Figure 4 is a longitudinal sectional view of my improved device, the section being taken at the line 4 on Fig. 6 and viewed in the direction of the arrow. Figure 5 is a longitudinal sectional view of the body portion of the device of Fig. 4, with the other parts removed, the section being taken at the line 5 on Fig. 6 and viewed in the direction of the arrow. Figure 7 is a longitudinal sectional view of the the side walls of the housing and forming a part of the structure referred to.

Figure 12 is a face view of the electrical heating element employed; and Figure 13, a face view of a perforated mica dlsk also forming a part of the structure of Fig. 4.

Referring more particularly to Figs. 1, 2 and 3, the structure therein shown comprises a supporting tube 14 whichis externally threaded, as represented, and 4is adapted to be mounted in an opening in an instrumentboard, as, for example, the opening 15 in the board 16 illustrated and which may be the instrument board of an automobile, the tube 14 being held in place on the board through the medium of nuts 17 and 18 screwed upon this tube and against the back and frontv faces, respectively, of the board. The tube 14, which ,is open at its opposite ends, con-I nec-ts Vwith the cross-piece 19 of a yokeshaped clip 20, at the aperture 21 therein, these parts being held together by clamping the cross-.piece 19 between deflected annular portions 22 and 23 of the tube 14. Supported in the clip 20 is a housing 24, straddled by the side arms of the clip, to which the housing is secured as by a screw 25 bridging the arms of this bracket, these arms prefu erably containing inwardly-struck' bosses 25l which extend into recesses' (not shown) in revent turning of the housing on the brac et, the housing 24 containing a shaft 26 journaled in the opposite wallsthereof and forming a part of an electric reel mechanism shown as of the same general construction as the reel disclosed in United States Patent No. 1,260,626 granted to me March 26, 1918, the wires Wound on the reel and located within the housing 24 being represented at 27 and a spring, for automatically re-winding the wire on the reel when drawn therefrom, at 28. the wires 27 extending through an opening 29 in the peri heral wall of the housing 24. The device a so comprises a j ack represented generally at 30 and formed of a casing 31, preferably of heat-non-conducting material, the end wall of which contains an opening 32 through vwhich the wires 27 ex'- tend. The opposite endof the casing 31 contain-s an electric socket structure 33 comprising an internally-threaded metallic shell 34 and a center contact 34 insulated there.- froni by the insulating disk 36. The threaded shell 34 is electrically connected with acontact strip 37 through which the center contact 35 extends and from which it is insulated by the disk 36 and a disk 38 surrounding the center contact, the strip 37 supporting a flexible contact strip 39 secured to the strip 37 by a rivet 40 passing through these elements andinsulated therefrom by the tubular, flanged, insulating member 414 and the insulating disk 42, a strip 43 of cur- Contactin engagement with which portion v the strip 39 extends except when it is pushed away therefrom against its inherent springiness,as through the medium of the button 44 secured to the strip 39 and movable in an opening 46 in the side wall of the casing 31.

The jack .30 is adapted to be inserted into the tube 14 as shown in Fig. 2, in which position the Vparts are in normal, inoperating, condition, the button 45 being of such size, as shown, that when the jack is introduced into the tube A14 'the engagement of the button with the inner surface of the tube 14 causes the contact 39 to be out of engagement with t-lie centercontact 35 and thus the circuit through the jack is broken. A

The jack constructed as described yis adapted to have screwed into its socket portion 33 an ignition device 47 embodying my improvements, thisignition device ,being formed of a main, body, member 48 which, 1n accordance with one feature of my inventlon, is formed of any suitableheat-nonconducting material. One face of the member 48 is provided with the stepped recesses 49 and 50 and the other thereof with stepped recesses 51 and 52, all of these recesses being concentrically disposed relative to the axis ,ofthe member 48, and the recesses 5() and 51 being separated from each other by an annular web portion 531forming an integral part of the member 48, this web surround-` ing a centrally-disposed sleeve portion 54 extending at opposite sides of the web. The end of the member 48 containing the recesses 49. and 50, is recessed at intervals, as repre-y sented at 55, these recesses, extending through the bottom stepped wall of the recess 49 and into the side wall of. this recess. The recesses 5.5 communicate with slots 56 in the web portion 53 shown as beyond the recess 52, this web portion also containing an opening 57 passage 58 extending therethrough in which a metallic member 59, forming the center contact of the igniting device, 1s confined. The member 59` contains, in one end thereof,

a socket 60 surrounded by an annular flange 61, and at its opposite end an internallythreaded socket 62 intoy which a contactscre-w 63, overlapping the adjacent end of the member 54, is screwed. The other contact member of the ignition device, and which is in the form of a screw plug, is represented at 64, this member, which is adapted to screw into the shell 34 of the jack, surrounding one end of the sleeve 54 and extending at an annular flange portion 65 thereof into the recess 52, the {iange portion 65 containing an aperture 66 registering with the aperture 57 in the web 53.

The coil of electric resistance wire which forms the heating element of the device, is represented at 67, the terminals 68 and 69 of this coil being electrically connected with the contact plug 64 and the center contact 59 as hereinafter described. The heating element 67 atwise opposes a perforated disk 70 of mica, backed by a similarly perforated disk 71 of asbestos, these disks surrounding the member 59 at its flanged end, with the-flange 61 overlapping the mica disk 70 at the wall of theaperture through the latter. A metal washer 72 extends flatwise against the disk 70, and liatwise opposing this washer at the opposite face thereof is la mica star, represented at 73, which is backed by a niet-al star 74 of the same shape andsize as the mica star 73 with its radiating portions in alinement theiiewith.. The members 70, 71, 72, 73, 74 and 67 are secured together, to form a unitary structure, by a ring 76 having rearwardly-extending lugs 77, this ring fitting atwise against the outer surface ofthe member 74, with its lugs 77 extending across the edges of the ,various members just referred to and bent to over- .lap the 'rearface of the disk 71, the struc- "ture so provided beingseated within the re,-

cess 49 and 'against the mutilated bottom wall 7 8 of this recess, which latter contains recesses 79 into which the extremities of the lugs 77 extend.

The connections between the terminals of the heating element 67 and the contacts of the igniting device are made as follows: l vThe terminal 68 extends through registering apertures in the disks 7() and 71v and vinto the openings 57 and 66 and is held tightl)7 in place in the opening 66 by a pin 78 driven into .these o nings and against the terminals 68. he other terminal 69 ofthe ignition element extends into the socket 60 of the member 59 and is held tightly in engagement therewith by a pin 79 driven into this socket and against :the terminal 69.

It will be noted from the foregoing that the ignition device is open from' end to end.

for the circulation of air therethrough, to maintain the parts of the device, ,atv which it is handled bythe operator, in cool condition, not only through the openings in the members 70, 71, 72, 73 and 74, the recess 50 and slots 56, but also through the recesses (which extend laterally beyond the ring 7 6), recess 50 and slots 56; this feature, particularly inv connection with that of providing cigar-lighter as the cooling effect produced does not impair the device for erforming the purpose for which it is provi ed.-

While I have illustrated and described a particular construction embodying my invention, I do not Wish to be understood as lntending to limit itthereto as the same vmay be variously modified and altered Without departin from the spirit of the invention.

YVhat claim as new, and desire to secure by Letters Patent, is:

1. In .a device of the character set forth, an insulation body having its front side provided With a chamber, and aresistance element assembly, mounted -in said chamber, comprising a spiral of resistance Ywire, insulation disks at opposite sides of the plane of said spiral, an intervening ring between said disks, and a retainer equip d with means clampingly securing said intervening ring together. v,

2. In a device of the character set forth, an insulation body provided at its front side with a chamber and at its rear side with ai metallic socket member, and a resistance element alssembly mounted in said chamber, comprising a pair of insulation disks, an intervening ring, a spiral of resistance wire disposed in the space within. said ring, and a retainery equipped with means securing said disks andl intervening ringv together, said spiral having an eccentric terminal extending through said insulation body and having a central terminal extending through said insulation body and through the socket member thereof.

3. An ignition device comprising an insulation body provided at its front and rear sides with chambers and provided at its rear side with a metallic socket member, a resistance element mounted in the front chamber and having one end ecoentrically connected with said socket member', airpassages connecting the front and rear chamisks and bers, and a central terminal comprising a metallic member extending through said insulation body and the socket-member and attached to the other end ofsaid resistance element and a screw connected with and serving to secure said central metallic member in position, ysaid screw affording a contact surface.

4. In an electric igniter, an insulation body equipped with a tubular metallic shank at its rear side affording a terminal and equi ped also With a resistance element at its ront side, said body having apertures therethrough outside said shank and open-` ing at front and rea-1' sides of said body.

5. In an electric igniter, an insulation body equipped w1th a tubular metallic shank at its rear side affording a terminal and equipped also with a resistance element at its front side, said body having apertures therethrough outside of said shank and .opening at front and rear sides of said body and said body having a central portion -extending through said metallic shank, and a central terminal extending through the central portion of said body and connected with said resistance element.

6. -A resistance element assembly comprising a pair` of apertured insulation disks, an intervening resistance spiral, a ring clamplngly securing said parts together, and a central terminal comprising ametallic member having its front end anchored to one extremity of said spiral and having the other end provided with a threaded bore, and a screw .in said bore having a head adapted to serve as a contact.

7. A resistance element assembly comprising a pair of apertured insulation disks, an intervening resistance spiral, a ring clampingly securing said parts together, and a central terminal comprising a metallic member having its ront end anchored to oneextremity of said spiral and having the other end provided with a threaded bore, and a screw in said bore having a head adapted to serve as a contact, in combinationv with an insulation body having its front face recessed to accommodate said resistance element and having a 'tubular shank portion through which said central terminal eX- tends, said screw` having its head 4portion provided with a ilange which bears against the rear end of the shank portion of the insulation body.

8. An ignition device comprising a bodymember containing a recess in a face thereof and a passage opening into said recess and opening through the op osite face of said member. and an electrica resistance element located in said recess in spaced relation to the end wall of the latter, said member containing a second passage opening into said recess and opening through .the face of said member in which said recess isvlocated.

llO

9. Ali ignitiondevice comprising a bodymember containinga recess 1n a :tace thereof,

and a unitary structure comprising an elecf.-

trical resistance element and open-Work membersof insulating material flatwise opposing said element and held together in assembled position located in said recess, said member containing a passage opening into said recess and through the opposite face of said member.

10. An :ignition device comprising a bodymember containing a recess in a face thereof,

i and a unitary structure comprising an elecelement on said body member, an electrical.

contact in said sleeve portion and contacting With one of the terminals yof said element, and a Secondelectrical Contact on said sleeve contacting with the other terminal of said element.

12. A. i-gar-lighting device. comprising a .body-member` presenting a sleeve-portion at its, central portion, an electrical resistance elein'ent on4 said body-member, an electrical center contact in said sleeve portion and contacting with one of the terminals of said element, and a second screW-plug contact surrounding said sleeve-portion and contacting with the other terminal of Said element.

maas?? which the other terminal of said element extends and is secured'. Y

14. An ignition device comprising a body# member containing a stepped recess in a face thereof and presenting a sleeve-portion at its central portion, an electrical resistance element in said recess in spaced relation to the end-wall thereof whereby said member presents a chamber between said element and the end wall of said recess, said member containing passages opening into'said chamber and opening through the opposite faces, respectively, of said lmember to provide air passages, a center contact member in said sleeve portion engaging one of the terminals of said element and a second electrical contact surrounding said sleeve-portion and in vengagement with the other terminal of said element.

15. An element Otan" electrical ignition device, comprising an electrical resistance element, insulating members ilatwise opposing said element, and a ring with lugs extending therefrom and having inwardlyv extending portions, said elements and membersbeing confined between said ring and the inwardly-extending portions of said lugs.

JOHN BERG.

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