Improvements to motor vehicle timing lights and tachometers

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(11)

EP 0 286 344 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	05.04.1989 Bulletin 1989/14

(43)	Date of publication A2:
	12.10.1988 Bulletin 1988/41

(21)	Application number: 88302993.6

(22)	Date of filing: 05.04.1988

(51)	International Patent Classification (IPC)⁴: F02P 17/00

(84)	Designated Contracting States:
	CH DE FR GB IT LI NL SE

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Priority:

06.04.1987 GB 8708132

(71)	Applicant: Hayward, William Keith
	Farnborough Hants GU14 6PS (GB)

(72)	Inventor:
	Hayward, William Keith Farnborough Hants GU14 6PS (GB)

(74)	Representative: Holt, Michael
	Texas Instruments Limited, Wellington House, 61-73 Staines Road West Sunbury on Thames TW16 7AH Sunbury on Thames TW16 7AH (GB)

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References cited: :

(54)	Improvements to motor vehicle timing lights and tachometers

(57) In an ignition timing light 10, a timing indication is provided by a stroboscopic lamp 11 whenever a pulse input is applied to lead 12 and trigger 14 is depressed. A value of engine rotation rate may be set by rotating a knob 15 having a pointer 16 relative to a scale 17. A circuit mounted within the timing light is arranged such that an indicator 18 indicates when the pulse input corresponds to the selected value of engine rotation speed determined by the setting of knob 15. Components of the same circuit can be used in the circuitry of the timing light advance feature.
The invention provides a combination timing light with advance feature and tachometer without recourse to the expensive meters and displays used in separate prior art tachometers.

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