GB832022A - Improvements in or relating to suppressors more particularly for sparking plugs - Google Patents

Improvements in or relating to suppressors more particularly for sparking plugs

Info

Publication number
GB832022A
GB832022A GB33806/57A GB3380657A GB832022A GB 832022 A GB832022 A GB 832022A GB 33806/57 A GB33806/57 A GB 33806/57A GB 3380657 A GB3380657 A GB 3380657A GB 832022 A GB832022 A GB 832022A
Authority
GB
United Kingdom
Prior art keywords
casing
resistor
sheath
secured
suppressor
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
Application number
GB33806/57A
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB832022A publication Critical patent/GB832022A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC 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

Landscapes

  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

832,022. Sparking plugs; ignition systems. BOSCH G.m.b.H., R. Oct. 30, 1957 [Nov. 3, 1956; Sept. 20, 1957], No. 33806/57. Class 7(4) [Also in Group XXXVI] A suppressor has a casing 1 of insulating material with a recess 2 for receiving the end of an ignition cable which is secured by a pointed screw 3 having a knurled head 7. A bush 5 for attachment to a sparking plug is secured in recess 4, the suppressor resistor being wound on a support 6. The current-conducting parts of the resistor are intimately embedded in a sheath 8 of thermosetting'synthetic resin to prevent corona discharge. The resistance coil is secured by a metal cap 6<SP>1</SP> which is fixed to an attachment on the head 7. Turns of the resistance, wire are wound between the convolutions of helical spring 9 which establishes electrical contact with the plug-bush 5. The section of the support 6 carrying the spring is stepped so that the sheath 8 has substantially the same thickness throughout its length. The section of the casing enclosing the sparking plug is coated internally with a layer 11 of polyester resin to prevent leakage currents. A suitable synthetic resin for the sheath 8 consists of a mixture of polyester resin with a suspension agent and a hardener such as benzoyl peroxide. In another arrangement, the resistor has two metal terminal caps and is inserted into a prefabricated casing of insulating material, synthetic resin being injected into the space between the inner wall of the casing and the resistor, so that the casing locates, without an intervening gap, the sheath within which the resistor is embedded, Fig. 2 (not shown). A mixture of a polyester resin with kaolin, with an admixture of a catalyst, is suitable for this purpose. The casing 1 may be moulded directly around the suppressor resistor, an alkyd resin powder being suitable, Fig. 3 (not shown). A metal casing 12 enclosing the sparking plug is provided with a spring washer 13.
GB33806/57A 1956-11-03 1957-10-30 Improvements in or relating to suppressors more particularly for sparking plugs Expired GB832022A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE832022X 1956-11-03

Publications (1)

Publication Number Publication Date
GB832022A true GB832022A (en) 1960-04-06

Family

ID=6755140

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33806/57A Expired GB832022A (en) 1956-11-03 1957-10-30 Improvements in or relating to suppressors more particularly for sparking plugs

Country Status (1)

Country Link
GB (1) GB832022A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212044A (en) * 1963-04-05 1965-10-12 Whitaker Cable Corp Spark plug boot having high frequency electrical discharge suppression means therein

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212044A (en) * 1963-04-05 1965-10-12 Whitaker Cable Corp Spark plug boot having high frequency electrical discharge suppression means therein

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