US2389466A - Resistor for spark plugs - Google Patents

Resistor for spark plugs Download PDF

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Publication number
US2389466A
US2389466A US53474844A US2389466A US 2389466 A US2389466 A US 2389466A US 53474844 A US53474844 A US 53474844A US 2389466 A US2389466 A US 2389466A
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United States
Prior art keywords
resistor
sleeve
resisting
spark plug
spark
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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
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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
Priority to US427023A priority Critical patent/US2366757A/en
Application filed by OHIO CARBON Co filed Critical OHIO CARBON Co
Priority to US53474844 priority patent/US2389466A/en
Application granted granted Critical
Publication of US2389466A publication Critical patent/US2389466A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

Nov. 20, 1945. L L. sToFFEL RESIS'IOR FOR SPARK PLUGS Original Filed Jan. 16. 1942 MMM K .www zd lfm. C nu .l l I Patented Nov. 20, 1945 RESISTOR FOR SPARK PLUGS Lester L. Stoiel, Lakewood, Ohio, assignor to The Ohio Carbon Company, Cleveland, Ohio, a corporation ot Ohio Original application January 16, 1942, Serial No.
427,023, now Patent No. 2,366,757, dated Jannary 9, 1945. Divided and this application May 9, 1944, Serial No. 534,748
s anims. (ci. zar-63) This application is a division of my copending application, Serial No. 427,023, iiled January 16, 1942, now Patent No. 2,366,757,` issued January 9, 1945, for a Resistor for spark plugs.
'I'his invention relates Ito aA resisting device adapted to be inserted between an electric contherewith, is a, compression spring' 25 bearing against the end of the element 20. This spring is compressed between the resisting element and a suitable abutment 30 which is in electric conductor and a spark plug to continue the connecy .tion and introduce a resistance adapted to suppress a spark at the connection to the plug. Such devices are in use for the purpose of preventing interference with radio reception on an automobile, due to the leakage or other irregular action of the ignition circuit. My invention is concerned particularly with means for mechanically and electrically connecting the resistor to the spark plus, the object being to provide such means in a simple form which may be readily applied in use and will maintain the resistor in place and in good electric connection with the spark plug notwithstanding the jarring due to the travel of the automobile.
In the drawing, Fig. l is a side elevation of a vresisting device made in accordance with this invention; Fig. 2 is an axial section of the resisting device on the line `2--2 in Fig. 1 and shown as mounted on a spark plug; Fig. 3 is a cross section through the portion which attaches to the spark plug, the plane of the section being indicated by the line 3--3 on Fig. 1.
In Fig. 2, A indicates a spark plug having a stem a with an annular groove a. My resistor is adapted to be mounted on the stem of the spark plug by being pushed axially thereon to hold itself in position by friction. This resistor carries a conducting extension having an external contour similar to that of the spark plug, so that the electric cable usually attached directly rto the spark Y plug may now be attached to the resistor.
As shown in Figs. 1 and 2, IBv indicates a cylindrical body of insulating material having a central bore Il leading from one `end thereof. This body carries a `metallic sleeve i2 embedded therein at the end where the bore is open, such sleeve extending around and .projecting beyond a reduced extensionl i3 of the body.
Inserted in the bore Il, is a resisting element 23 which may be a round stick of carbon having layers of metal secured across its ends. 22 indicates a metallic plus, 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.
In the bore Il of the body at the other end of the resisting element, and in electric connection nection with the part to be attached to the plug. This spring 2,5, therefore, is itself in good electric connection with the resistor and causes the resistor .to be in good connection to the plug 22, thus providing for a continuous conduction from .the supply cable embracing the sleeve l2 to the spark plus.
The member 30 which connects the'resisting device with a spark plug' has a. solid head 3| embedded in the insulating body I0 and a sleeve portion 32 extending outwardly in an axial direction and diametrically split as indicated at 33. The head portion of the member 3'0 is externally knurled to insure effective attachment to the insulating body. The external sleeve portion adjacent the bodyis indented inwardly' in opposed regions, as indicated at 35, to provide shoulders adapted to slide along the stem oi the spark plug and into the annular groove a thereof, when the sleeve is in proper position on the stem.
To prevent undue spreading of the split sleeve and maintain it in a position for close frictional engagement with the spark plug stem, I form an annular groove 36 in the exterior of the sleeve beyond the projections 35 and in this annular groove I mount an incomplete annular wire ring 3l. This ring allows a slight spreading of the split sleeve as it is put in place, but is sufficiently rigid to prevent undue spreading and thus the sleeve will maintain a tight engagement with the spark plug stem.
It will be seen that the split sleeve is effectively attached in a very simple manner to the insulating body so that the whole device when mounted on the spark plug stem will hold itself eiectively thereon. Moreover, by making the head of the sleeve the abutment for the internal spring acting against the resisting element, I insure a goodk electric connection with a minimum of parts.
I claim:
1. The combination of an insulatingv body, a
resisting element within the body, an external sleeve carried by the body' in electric connection with the resisting element, a metallic attaching member adapted to engagea spark plug, said member extending axially intol the insulating body and being embedded therein, and an electric connecting member within the body between the embedded member and the resisting element.
2. 'I'he combination of an insulating body, a metallic sleeve carried thereby and projecting ment within the body'in electric connection with seid external sleeve, a metallic member projecting from the exterior through the opposite end of the body into the interior thereof and there permanently embedded in the body, seid metallic member having externally of the body en integral split sleeve portion, a split ring embracing the sleeve portion beyond the end of the insulation, and e coiled spring of conducting materiel within the insulation and compressed between tnemetallie member and the resistor.
LESTER L. STiZllF'FiiiLv
US53474844 1942-01-16 1944-05-09 Resistor for spark plugs Expired - Lifetime US2389466A (en)

Priority Applications (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

Applications Claiming Priority (1)

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

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US2389466A true US2389466A (en) 1945-11-20

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US53474844 Expired - Lifetime US2389466A (en) 1942-01-16 1944-05-09 Resistor for spark plugs

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2464052A (en) * 1947-01-13 1949-03-08 Numrich John Heating unit for pipes
US2543527A (en) * 1946-11-01 1951-02-27 Gyuris John Punch machine for punching electrical heater elements
US3212044A (en) * 1963-04-05 1965-10-12 Whitaker Cable Corp Spark plug boot having high frequency electrical discharge suppression means therein
US5864283A (en) * 1996-12-12 1999-01-26 King Electronics Co., Inc. Microwave frequency chip resistor assembly
US20070293064A1 (en) * 2006-06-16 2007-12-20 Dennis Steinhardt Spark plug boot

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543527A (en) * 1946-11-01 1951-02-27 Gyuris John Punch machine for punching electrical heater elements
US2464052A (en) * 1947-01-13 1949-03-08 Numrich John Heating unit for pipes
US3212044A (en) * 1963-04-05 1965-10-12 Whitaker Cable Corp Spark plug boot having high frequency electrical discharge suppression means therein
US5864283A (en) * 1996-12-12 1999-01-26 King Electronics Co., Inc. Microwave frequency chip resistor 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

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