US2366757A - Resistor for spark plugs - Google Patents

Resistor for spark plugs Download PDF

Info

Publication number
US2366757A
US2366757A US427023A US42702342A US2366757A US 2366757 A US2366757 A US 2366757A US 427023 A US427023 A US 427023A US 42702342 A US42702342 A US 42702342A US 2366757 A US2366757 A US 2366757A
Authority
US
United States
Prior art keywords
sleeve
resistor
plug
external
spark
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
US427023A
Inventor
Lester L Stoffel
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.)
OHIO CARBON Co
Original Assignee
OHIO CARBON Co
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 OHIO CARBON Co filed Critical OHIO CARBON Co
Priority to US427023A priority Critical patent/US2366757A/en
Priority claimed from US53474844 external-priority patent/US2389466A/en
Application granted granted Critical
Publication of US2366757A publication Critical patent/US2366757A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01TSPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00Sparking plugs
    • H01T13/02Details
    • H01T13/04Means providing electrical connection to sparking plugs
    • H01T13/05Means providing electrical connection to sparking plugs combined with interference suppressing or shielding means

Description

Jan. 9, 1945. 1 L.. s'roFFEL 2,366,757
REsIsTOR FOR SPARK PLUGS Filed Jan. 16, 1942y l mummia. 1,0
Patented Jan. 9, 1945 ,f mzslsron Fon SPARK PLUGS Lester L'. Stoffel, Lakewood, Ohio, assignorto The Ohio Carbon Company, Cleveland, Ohio,y ai corporationl of Ohio Application January 1.6, 1942,SeralfNo. 427,023
' 4 Claims.
This invention relates to a resisting device adapted to be inserted between an electric conductor and a spark plug to .continue lthe connection and introduce a resistance adapted to suppress a spark at the connection tothe plug. Such devices are in use for the purpose ofipreventing interference with lradio reception on anautomobile, due to .theleakagefor other irregular action of ythe ignition circuit.. yMy invention is concerned particularly with means zfor mechanically and electrically connecting the resistorfto the spark plug, the object beingto provide such means in ai simple formifwhich-may be readily applied in use andwillmaintain the resistor in place and in goodvelectrie connection with-the spark plug notwithstanding the jarring due to the travel of the automobile.
Several embodiments of my invention are shown in the drawing hereof and are hereinafter more fullydescribed. In the drawing, Fig.` 1 is a sectional side elevation or one for-m of my resistor in place on a spark plug; Fig. 2 is a sectional end elevation of the embodimentof`F'ig.`1;` Fig. 3
sectional elevationof a third embodiment ofthe invention.
In Fig. l.v Aindicates a spark plugA having a conducting stem a'with an annular groove c'.
My resistor, in any of the forms illustrated, is adapted to be mounted on the' spark plug stern and carries a conducting extension having an external 'contour similar to the'spark plug, so that the electric cable usually attached directly` to l the spark plug stem may now bey attached toy the resistor.
Referring rst to the embodiment shown in Figs. 1 `and 2, I0 indicates a cylindrical body of insulating material having a central bore I I leading from one end thereof. This body carries a metallic sleeve I2 embedded therein at the end where the bore is open, such sleeve exten-ding around and projecting beyond a reduced extension I3 of the body.
Inserted in the bore I I is a resisting element 2U which may be a round stick of carbon having layers of metal secured across its ends. 22 indicates a metallic plug, which may be of lead, seated in the end portion of the metallic sleeve I2 and in electric connection therewith and forming a conductive abutment for the end of the resisting element 20.
l In the bore II of the body at the other end of the resisting element. and in electric connection therewith, is: a lcompression spring 25 bearing vagainst the rend of the element 120. This yspringis compressed between the resisting element and a suitable abutment which is in electric connection with theA part tombe attachedr to the plug. This l springt 25 thereforeis itself in good lelectric vconnection, with the resistor andcauses the: resistor to bein' rgood connection to the plug comparatively stiff external 'Wire ring 32 `embracing the split sleeve and seatedk inv a groove y'33 thereof.
' As shown in Fig. l, the ysplit sleeve .30leads from a solid head 35 on the other side of which is an axial screw-threaded extension 36 of smaller diameter. This extension passes into an internally threaded lateral recess I5 in the insulating body and attaches the split sleeve thereto, and also forms the abutment for the spring 25.
Heretofore there has been considerable difficulty in maintaining sleeves of resistors in good electric connection with the stem of the spark plug. It is highly important that such good connection be maintained, not only to enable a prop- -er spark to be supplied to the engine, but also to prevent anyfexternal sparking beyond the range of the resistor to suppress. I have found that while a simple split sleeve on the resistor is likely to become loose on the spark plug stem, due to the jarring andthe eccentric action of the cable,A the looseness is entirely overcome by myinvention by the retaining ring 32 on the sleeve.
The embodiment of Figs. 3 and 4 employs the same principle of a split sleeve with an external ring but the connection therefrom to the resistor is diierent. In this embodiment the body IUa has the external conducting sleeve I2.and internally carries the resistor the same as in Fig. l. The internal spring 25, however, which at one end engages the resistor, at the other end here engages the inner end of an axially mounted vscrew 4I), the external head 4| of which holds the split sleeve in position on the body. In this case the split sleeve 30a has an extension 31 formed by iiattening the sleeve to produce two engaging plies. An opening extends through these plies which is occupied by the shank of the screw 40, the head 4I of the screw overlapping this flattened extension of the sleeve.
The screw 4U mechanically holds the sleeve o-n the body in a, position projecting at right angles thereto, and at the same time forms the outer abutment for the spring 25 and thus causes a good electric connection from the sleeve l2 and its plug, through the resistor and internal spring and screw, to the external sleeve and thence to the spark plug. The engaging portion of the external sleeve has an external groove 33 occupied by a split wire ring 32, the same as in Fig. 1.
In the embodiment of Fig. 5 the external sleeve 30D is mounted axially on the body lDb. This body carries the metallic connecting sleeve I2 and the resistor 20 as in the other embodiments. The plug-engaging sleeve 3D1), however, is differently connected, being formed with a solid head 3B, which is embedded in a, large axial recess communicating with the bore Il. This head forms the abutment for the internal spring 25, the other end of which engages the resistor. This sleeve 30D, like the others, has an external annular groove occupied by a split ring.
In any of the three embodiments shown, the
split sleeve is effectively attached mechanically to the insulating body of the resistor and is in good electric connection with the resistor through the spring which maintains the resistor in snug contact with the metallic plug of the sleeve to which the ignition cable is attached. In each embodiment, either a part of the plug-engaging sleeve itself, or the attaching device for the sleeve, forms the abutment for the internal spring acting on the resistor, and in each embodiment the split sleeve which embraces the plug stem is prevented from spreading or other distortion in use by the restraining effect of the embracing stiff wire ring.
Reference is made to my divisional application No. 534,748, led May 9, 1944, for claims relating to the subject matter illustrated in Fig. 5.
I claim:
.1.. A resistor device for spark plugs comprising an insulating body having a comparatively thin walled open ended cylindrical portion, the opening thereof extending into said body, a metallic sleeve embedded in said body and embracing said cylindrical portion thereof, a resistor mounted in the opening of said cylindrical portion and substantially embraced by said metallic sleeve, a metallic r' electrical contacting plug closing the opening in said sleeve and having an outer surface exposed to the exterior of the device and an inner surface in direct electrical contact with one end of said resistor, a spark plug connecting member having an integral threaded portion screwed into said body transversely of the resistor retaining opening therein, and a metallic coil spring interposed between said threaded portion of said connecting member and said resistor forming an electrical conductor therebetween.
2. A resistor device for spark plugs comprising a body of insulating material, said body having a thin walled cylindrical portion of an external diameter smaller than the remaining portion of the body, an open ended metallic sleeve embracing said cylindrical portion and having its inner end embedded in said body, a resistor within said cylindrical portion of said body and substantially embraced by said sleeve but insulated therefrom by said body, a metallic electrical conducting plug in the open end of said sleeve having a direct electrical contact with one end of said resistor and with said sleeve, a split sleeve adapted to embrace a spark plug stem, a, spring retaining ring ernbracing said sleeve to resiliently contract it, threaded means screwed into the larger portion of said body to connect said split sleeve with said body and form an electrical connection between said split sleeve and the interior of said body, and a metallic coil spring interposed between said threaded means and said resistor to position the resistor against said plug and provide an electrical conductor between said resistor and said threaded means.
3. A resistor for spark plugs comprising an insulating body, a conductive member carried thereby and extending beyond the body, a resisting element within the body in electric connection with the conductive extension, an external sleeve adapted to embrace the spark plug, said sleeve having a flattened portion located at the opposite end of the body from the conductive extension, a member passing through an opening in the flattened portion of the sleeve and entering the body and secured thereto, said member having an external head engaging the outer face of the attened portion of the sleeve, and a conductor within the body electrically connecting the inner end of the resisting element with the member holding the sleeve.
4. A resistor for spark plugs comprising an insulating body, a conductive sleeve carried thereby and adapted to be embraced by the terminal of an ignition circuit, a. resisting element within the body in electric connection with the conductive sleeve, an external split sleeve adapted to embrace the spark plug, said split sleeve having a flattened portion located at one end of the body, a screw passing through an opening in the flattened portion of the sleeve and entering the body and secured thereto, and holding the external sleeve in place, a compression spring within the body bearing at one end against the inner end of the resisting element and at the other end against said screw, and a restraining ring embracing the split sleeve,
LESTER L. STOFFEL.
US427023A 1942-01-16 1942-01-16 Resistor for spark plugs Expired - Lifetime US2366757A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US427023A US2366757A (en) 1942-01-16 1942-01-16 Resistor for spark plugs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US427023A US2366757A (en) 1942-01-16 1942-01-16 Resistor for spark plugs
US53474844 US2389466A (en) 1942-01-16 1944-05-09 Resistor for spark plugs

Publications (1)

Publication Number Publication Date
US2366757A true US2366757A (en) 1945-01-09

Family

ID=23693165

Family Applications (1)

Application Number Title Priority Date Filing Date
US427023A Expired - Lifetime US2366757A (en) 1942-01-16 1942-01-16 Resistor for spark plugs

Country Status (1)

Country Link
US (1) US2366757A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879363A (en) * 1954-06-28 1959-03-24 Clarostat Mfg Co Inc Electrical unit mounting assembly
US20070293064A1 (en) * 2006-06-16 2007-12-20 Dennis Steinhardt Spark plug boot

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879363A (en) * 1954-06-28 1959-03-24 Clarostat Mfg Co Inc Electrical unit mounting assembly
US20070293064A1 (en) * 2006-06-16 2007-12-20 Dennis Steinhardt Spark plug boot
US7455537B2 (en) 2006-06-16 2008-11-25 Briggs & Stratton Corporation Spark plug boot

Similar Documents

Publication Publication Date Title
US5159233A (en) Spark plug and method for assembling a spark plug
US2312002A (en) Electrical connector
US4447107A (en) Collet for cable connector
US1657253A (en) Connecter for electric conductors
US4751430A (en) Spark plug connector having transformer, capacitor, and spark gap
US2187427A (en) Dashboard fuse mounting
US7455536B2 (en) Contact element for electrically
US1873042A (en) Swivel electrical connecter
US20050284454A1 (en) Ignition device for internal combustion engine
US2550358A (en) Spark plug terminal protector
US2957099A (en) Spark plugs
US3300672A (en) Spark plug with anti-fouling means and fixed spark gap
KR940002998B1 (en) Electrical connector for a distributorless ignition system
US2159150A (en) Ignition mechanism
GB612213A (en) Improvements relating to electric cable couplings
US2173766A (en) Electrical ignition apparatus for internal combustion engines
US1672201A (en) Terminal connecter for electrical supply cables
US1969866A (en) Radio shielded cable fastener
US2685021A (en) Electrically heated garment
US2506768A (en) Glow plug for internal-combustion engines
US2076072A (en) Connecter
US2113735A (en) Radio shielding for spark plugs
US2442858A (en) Spark plug
US2368889A (en) Shielded spark plug
US6952948B2 (en) Spark plug for receiving a pressure sensor and corresponding spark plug connector