Electrical switch having interdigitated and through poles

(19)

(11)

EP 0 637 830 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	14.06.1995 Bulletin 1995/24

(43)	Date of publication A2:
	08.02.1995 Bulletin 1995/06

(21)	Application number: 94302841.5

(22)	Date of filing: 21.04.1994

(51)	International Patent Classification (IPC)⁶: H01H 13/70

(84)	Designated Contracting States:
	BE DE FR GB NL SE

(30)

Priority:

20.07.1993 US 95113

(71)	Applicant: FLUKE CORPORATION
	Everett, Washington 98206-9090 (US)

(72)	Inventor:
	Shimono, Yoshio Mukilteo, Washington 98275 (US)

(74)	Representative: Burke, Steven David et al
	R.G.C. Jenkins & Co. 26 Caxton Street London SW1H 0RJ London SW1H 0RJ (GB)

(56)

References cited: :

(54)	Electrical switch having interdigitated and through poles

(57) An electrical switch is provided having first (76) and second (78) interdigitated poles and a through pole (80) passing therebetween. Each of the first and second poles have multiple fingers (82,84) spaced-apart and coplanar with one another. The through pole meanders through, is spaced-apart from and coplanar with the fingers of the other poles, and does not box in the other poles of the switch. In a keypad embodying an array of switches, the poles of each switch are connected to conductive traces that are brought out to an edge of the keypad. The traces are formed on one surface of the keypad. The through pole allows one or more of the poles of the switches in the keypad to be interconnected and brought to the edge of the keypad while remaining on the same surface of the keypad, thereby permitting the use of a single electrical connector for coupling the switches to other circuitry.

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