US3919521A - Ignition plug for electric cigarette lighter - Google Patents

Ignition plug for electric cigarette lighter Download PDF

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Publication number
US3919521A
US3919521A US456293A US45629374A US3919521A US 3919521 A US3919521 A US 3919521A US 456293 A US456293 A US 456293A US 45629374 A US45629374 A US 45629374A US 3919521 A US3919521 A US 3919521A
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US
United States
Prior art keywords
connecting member
cigarette lighter
ignition plug
cup
plug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US456293A
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English (en)
Inventor
Mitsuru Iwao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokai Rika Co Ltd
Original Assignee
Tokai Rika Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokai Rika Co Ltd filed Critical Tokai Rika Co Ltd
Application granted granted Critical
Publication of US3919521A publication Critical patent/US3919521A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs

Definitions

  • ABSTRACT An ignition plug for an electric cigarette lighter which comprises a unitary assembly formed by the use of an elongated connecting member of polygonal cross sec- [30] Foreign Application Priority Data Apr. 3. 1973 tion that extends through the cup. insulating spacer and end plate. each having an centrally disposed opening adapted to pass the connecting member therethrough and shaped to conform to the cross section of the polygonal connecting member. thus eliminating unfavorable relative motion. Furthermore. the secur- Cited UNITED STATES PATENTS References ing of the knob to the plug body in manufacturing of the ignition plug is much simplified by employing a special nut with projections and corresponding opening ⁇ vithnotches formed in the sleeve for the plug.
  • the present invention relates to electric cigarette lighters of a type including an ignition plug adaptable to be energized in a socket and removable therefrom for use in lighting a cigarette or tobacco.
  • thepresent invention pertains to the arrangement of the ignition plug wherein a unitary assembly including at one end a cup provided therein with an electrically heated ignition coil and at the opposite end an insulating block can, relative to a knob having a threaded stud to be secured to the insulating block of the unitary assembly, be rotated without accompanying relative rotation between any two members of the cup, igniting coil and insulating block, the relative rotation between the knob and the unitary assembly being required for facilitating rigid connection between the threaded stud of the knob and the insulating block of the unitary assembly during manufacture or assembly of the ignition plug.
  • the fixing of the insulating disk to the plug body is rather complicated, in the manufacturing of the igniting plug, because said disk is secured at the other end of the rigid tubular member of the recessed flange by lugs bent into the grooves formed in said disk with said disk being formed with a threaded aperture to receive a threaded stud of the knob.
  • an essential object of the present invention is to provide an improved ignition plug arrangement adaptable to be energized in a socket and removable therefrom for use in lighting a cigarette or tobacco, which can be easily assembled with substantial elimination of the inconveniencesinherent in the manufacture of the prior art cigarette lighter.
  • Another important object of the present invention is to provide the ignition plug arrangement of the type above referred to, wherein the knob can be attached to the unitary assembly without disturbing the relationship of the cup, igniting coil, and insulating spacer when the latter are grasped to facilitate the attachment.
  • the ignition plug arrangement of the type referred to wherein the unitary assembly is formed by the use of an elongated connecting member of polygonal cross section that extends through the cup, insulating spacer and end plate, each having an centrally disposed opening adapted to pass the connecting member therethrough, and shaped to conform to the cross section of the polygonal connecting member. Because of the particular shape of the central opening in each of the cup, insulating spacer and end'plate in relation to the mating cross section of the polygonal connecting member, an unfavorable relative motion does not take place, without such combined projections and indentations as required in the prior art ignition plug.
  • the fixing of the knob to the plug body is much simplified by preparing a special nut of cylindrical shape which is provided with three projections of key shape outwardly, radially extending at equal intervals from the outer surface of said nut.
  • One end of an inner sleeve for the plug body facing the threaded stud of the knob is formed with a centrally disposed concentric opening of somewhat smaller diameter with three notches on the brim thereof at positions corresponding to the projections of said nut so as to pass the above nut and has a shape to conform to the cross section of said nut.
  • a narrow, short rectangular tongue in one edge and another similar longer tongue in the other edge are formed, for engaging the sides of the corresponding projections of the nut, which are bent at right angles to the surface of the brim of the opening, extending inwardly into the sleeve from said edges.
  • the upper end face of each projection of the nut is slightly tapered towards neighboring projection in the direction of threading of said'nut for guiding purpose upon insertion of the nut into said opening of the plug body sleeve.
  • the one lower corner of the short tongue is suitably rounded for guiding the projection of the nut.
  • the threaded stud of the knob is, through an opening of a mounting plate, engaged with the nut to some extent and inserted into the notched opening of the plug body sleeve with the projections of the nut fitting into the corresponding notches in the opening.
  • the knob is then turned in the direction of tightening. In this state.
  • FIG. 1 is a longitudinal sectional view of an electric cigarette lighter, with a portion broken away, embodying the present invention
  • FIG. 2 is an exploded view of a unitary assembly in the ignition plug of FIG. 1,
  • FIG. 3 is a top plan view of a plug body sleeve employed in the plug of FIG. 1,
  • FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 3,
  • FIG. 5 is a top plan view of a nut with projections, employed in the plug of FIG. 1,
  • FIG. 6 is a side elevational view of the nut shown in FIG. 5,
  • the electric cigarette lighter comprises a removable ignition plug 3 shown as inserted in a socket 1.
  • the socket 1 includes a clamping sleeve la for clamping the socket l in an opening Pa formed in a wall P such as a vehicle dashboard.
  • the socket 1 is provided with bimetallic fingers connected to a current inlet post 19 which contain and conduct electricity to the plug 3 when engaged thereto to heat the spirally wound ignition coil 18 and release the plug 3 after the coil 18 has reached a predetermined temperature for lighting cigarettes or tobacco.
  • the above arrangement of the socket which may be used with the plug of the invention is well known to those skilled in the art and, therefore, the details thereof are herein omitted for the sake of brevity.
  • the cup 8 in which the ignition coil 18 is contained is provided with a square opening 13 formed at the center thereof through which the shank of a connecting member 16 passes, and has an axially protruding flange 8a adapted to surround an ignition coil 18.
  • a connect ing member 16 of square cross section has one end extremity integrally formed with a pin-like element 14 for an electrode having a groove 9.
  • the groove 9 extends at right angles to the longitudinal axis of said pin-like element 14, the latter being adapted to hold the ignition coil 18 in such a way that one end of said coil 18 is rigidly received in said groove 9. At the boundary beformed at the center thereof, supported on the adjacent surface of the cup 8.
  • a ceramic spacer 7 which has a square opening 11 axially formed therein and is formed at one end face with an outwardly projecting square portion 10 which fits into the opening 13 of the cup 8.
  • An end plate 6 is also formed, at the center thereof, with a square opening 12 having a spherical portion of said opening axially recessed or projected.
  • the square shank portion of the connecting member 16 is inserted through the square openings of the heat-resistant insulating plate 17, the cup 8 the ceramic spacer 7 and finally through the opening 12 of the end plate 6.
  • the end of the connecting member 16 is calked as at 16', securing the cup 8, the insulating plate 17, the cup 13, the ceramic spacer 7 and the end plate 6 rigidly together.
  • an inner sleeve 4 of a hollow cylindrical shape has a flange portion 4b with a larger diameter than that of the main portion 4.
  • the end plate 6 connected to the cup 8, the ceramic spacer 7 and insulating plate 17 in the above manner is inserted in the flange portion 4b of the inner sleeve 4 and secured therein in such a manner that the edge of the flange portion 4b is bent inward around the periphery of the end plate 6 as at 4c in FIG. 1.
  • the other end of the inner sleeve 4 facing a threaded stud 5a of the knob 5 is formed with an centrally disposed concentric opening 4a of somewhat smaller diameter than that of the sleeve 4 with three notches 27 formed on the brim of the opening
  • a narrow, short rectangular tongue 29 in one edge and another similar longer tongue 30 in the other edge are formed which are bent at right angles to the surfaces of the brim of the opening 4a, extending inwardly into the sleeve 4 from said edges.
  • a special nut 24 is formed on its outer peripheral surface with a plurality of, for example, three key shaped projections 25 which extend in parallel to each other equidistantly about the axis of the nut 24 and which also extend in parallel to the axis of the nut 24.
  • the upper end face of each projection 25 of the nut 24 is slightly tapered towards the neighboring projection in the direction of threading of said nut 24 for guiding purpose upon insertion of the nut 24 into said opening 4a of the inner sleeve 4.
  • the one end comer of the short tongue 29 is suitably rounded for guiding the projections 25 of the nut 24 upon insertion.
  • the threaded stud 5a of the knob 5 is, through an opening of a mounting plate 2, engaged with the nut 24 to a slight extent and inserted into the notched opening 4a of the inner sleeve 4 with the projections 25 of the nut 24 fitting into the corresponding notches 27 in said opening 4a.
  • the knob 5 is then turned in the direction of tightening.
  • the angle between the neighboring edges of the short tongue 29. and the long tonguefifl shouldbe approximatelyequalto the angle 0 between the, opposing two sides of the neighboring two projections 253s shown in FIGS. 3 and 5.
  • a further turning of the knob 5 draws the nut 24 close to-the; mounting plate with'the short tongue 29 now contacting the sideface of another projection of the nut 24, and the upper face of the ,nut24 with projections 25 is tightly pressed against the mounting plate 2 of the plug body sleeve 30.
  • the above unitary assembly is included in the plug body sleeve 3a and is adapted to be axially movablewith respect to the sleeve 3a.
  • the sleeve 3a is provided with an annular protuberance 3c adjacent to the connected portion 40 of the end plate 6 and the flange portion of the 4b of the sleeve 4.
  • a spring 22 is provided between the protuberance 3c and the inner face of the mounting plate 2, encircling the sleeve 4 to enable the sleeve 4 to move the unitary assembly both axially and circumferentially with respect to the plug sleeve 3a in a manner well known in the art.
  • the manufacturing of the ignition plug is made much simplified by the use of the special nut with key shaped projections and the sleeve which advantageously receives the projections, ehabling the knob to be attached to the ignition plug very rigidly and simply.
  • An ignition plug for an electrical cigarette lighter adapted to be inserted into a socket for energization and removable from said socket for use in lighting cigarettes comprising:
  • a unitary assembly including, at one end thereof, an elongated connecting member of polygonal cross section extending through an electric heating unit, said electric heating unit including an ignition coil connected to one end of said connecting member, a cup connected to and surrounding said ignition coil, an insulating spacer and an end plate, each of said cup, insulating spacer and end plate having a centrally disposed opening adapted to pass said connecting member therethrough and shaped to conform to the cross section of said polygonal connecting member so that no relative motion takes place among said cup, insulating plate and end plate, and means for fixing aninsulating knob to said unitary as- ..sembly at an opposite end of said unitary assembly, said fixingmeans comprising a'nutformed on its outer peripheral surface witha plurality of projections which extend in parallel to each other spaced at equal distances abouttheaxis'of 'said' nut and a "which also extend in parallel to the axis of said nut,
  • a centrally disposed opening with a brim which is 1 formed on corresponding end of an inner sleeve of said unitary assembly, and which is shaped with notches to conform to the cross section of said nut, said opening having a short tongue bent at right angles to a surface of 'said brim axially inwardly extending into the sleeve from an inner edge of one notch and a long tongue similarly bent at right angles to said surface of'said brim axially inwardly extending into the sleeve from an inner edge of another notch so that, when said nut slightly engaged with a threaded stud of said knob through which a mounting plate is inserted is passed into said opening with subsequent further turning of said knob, said long tongue engages said projections and is prevented from rotation, resulting in rigid engagement between said knob and said unitary assembly.
  • An ignition plug for an electrical cigarette lighter as claimed in claim 1 wherein said elongated connecting member is of square cross section at a shank thereof with one end extremity integrally formed with a pinlike element having a groove, and has an annular collar at a boundary between said pin-like element and said shank.
  • An ignition plug for an electrical cigarette lighter as claimed in claim 1 wherein said connecting member has a square cross section and said cup has a square opening formed at the center thereof with an axially protruding flange.
  • An ignition plug for an electrical cigarette lighter as claimed in claim 1 wherein said connecting member has a square cross section and said insulating spacer has a square opening axially formed therein, said insulating spacer having one end face outwardly projecting in alignment with said square opening.
  • An ignition plug for an electrical cigarette lighter as claimed in Claim 1 wherein said connecting member has a square cross section and said end plate is formed at the center thereof with a square opening, a peripheral portion of said opening being axially recessed or projected.
  • An ignition plug for an electrical cigarette lighter as claimed in claim 8 wherein said pin-like element has a groove at the end' thereof and said ignition coil has one end rigidly received in said groove.
  • An ignition plug for an electrical cigarette lighter comprising a unitary plug assembly and fixing means for fixing said plug assembly to an insulating knob, said unitar fplug assembly comprising anlelongated connecting member having a polygonal cross section and an electrical heating unit fixed to member and a second end connected to said cup member, and wherein said fixing means fixes said insulating knob at an end of said unitary plug assembly opposite to said one end of said connecting member.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spark Plugs (AREA)
US456293A 1973-04-03 1974-03-29 Ignition plug for electric cigarette lighter Expired - Lifetime US3919521A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1973040410U JPS49141270U (enExample) 1973-04-03 1973-04-03

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US3919521A true US3919521A (en) 1975-11-11

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JP (1) JPS49141270U (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2369506A1 (fr) * 1976-10-29 1978-05-26 Schoeller & Co Elektrotech Fiche pour allume-cigare electrique
US4580856A (en) * 1983-04-22 1986-04-08 Casco Products Corporation Composite clamping shell for electric cigar lighters
US4669185A (en) * 1983-04-22 1987-06-02 Casco Products Corporation Method of making a composite clamping shell
US4995835A (en) * 1988-11-23 1991-02-26 Cunningham Paul A Electrical heater and plug
CN100443804C (zh) * 2006-09-27 2008-12-17 何永业 一种车辆点烟器取电插头及其应用

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3088015A (en) * 1960-04-14 1963-04-30 Casco Products Corp Electric cigar lighter
US3238354A (en) * 1963-10-18 1966-03-01 Essex Wire Corp Ignitor plug
US3341687A (en) * 1964-10-23 1967-09-12 Casco Products Corp Electric cigar lighter
US3434012A (en) * 1967-06-01 1969-03-18 Gen Motors Corp Glow igniter
US3519794A (en) * 1968-06-26 1970-07-07 Jones Burnett Edwards Lighter plug unit
US3818179A (en) * 1972-09-26 1974-06-18 Tokai Rika Co Ltd Electric cigarette lighter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3088015A (en) * 1960-04-14 1963-04-30 Casco Products Corp Electric cigar lighter
US3238354A (en) * 1963-10-18 1966-03-01 Essex Wire Corp Ignitor plug
US3341687A (en) * 1964-10-23 1967-09-12 Casco Products Corp Electric cigar lighter
US3434012A (en) * 1967-06-01 1969-03-18 Gen Motors Corp Glow igniter
US3519794A (en) * 1968-06-26 1970-07-07 Jones Burnett Edwards Lighter plug unit
US3818179A (en) * 1972-09-26 1974-06-18 Tokai Rika Co Ltd Electric cigarette lighter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2369506A1 (fr) * 1976-10-29 1978-05-26 Schoeller & Co Elektrotech Fiche pour allume-cigare electrique
US4580856A (en) * 1983-04-22 1986-04-08 Casco Products Corporation Composite clamping shell for electric cigar lighters
US4669185A (en) * 1983-04-22 1987-06-02 Casco Products Corporation Method of making a composite clamping shell
US4995835A (en) * 1988-11-23 1991-02-26 Cunningham Paul A Electrical heater and plug
CN100443804C (zh) * 2006-09-27 2008-12-17 何永业 一种车辆点烟器取电插头及其应用

Also Published As

Publication number Publication date
JPS49141270U (enExample) 1974-12-05

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