Document Type and Number:
Japanese Patent JPS5531975
Kind Code:
B2
Abstract:
The timer has switches including upper and lower passive blades and an active blade therebetween. The distal end of the lower passive blade has depending spacers which straddle the cam upon which the follower on the distal end of the active blade rides. The spacers reference the lower passive blade off the hub of the drum type program cam. The lower passive blade is provided with a rest or stop for the upper passive blade limiting downward movement of that blade. With precision molding, both passive blades are accurately referenced from the cam hub and the location of the follower which actuates the active blade is precisely located. Accuracy of switching is increased without increased precision in manufacture. Use of two cam tracks permits simultaneous actuation of the active and "passive" blades to effect faster switching. It is possible to provide a "make-make" arrangement instead of the double throw arrangement.
Application Number:
JP8415272A
Publication Date:
August 22, 1980
Filing Date:
August 24, 1972
Export Citation:
International Classes:
H01H43/10; G05B19/06; H01H19/63; H01H43/02; (IPC1-7): H01H43/10