Rotary switch with an automatic re-setting mechanism

Details Rotary switch with an automatic re-setting mechanism Rotary switch with an automatic re-setting mechanism

1981-04-27

1982-08-17

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

With latch- or trip-reset means

335164, 335189, H01H 920

Patent

active

043452264

ABSTRACT:
A rotary switch has a control shaft (8) controlling electrical contacts (not shown). On being moved from the "OFF" position as illustrated towards an "ON" position by turning clockwise (arrow 9), a ramp (21) on a cam (2) engages a cam follower (41) mounted on a first lever arm (3). The first arm is held in position against the thrust of the cam follower's bias spring (42) by a catch (31) engaging a bearing surface (51) of a second lever arm (5). Similarly the second lever (5) is held in position by a spring (52) urging it against the moving part of an electromagnet (7). The electromagnet is shown in its powered position with spring (61) compressed thereby. Turning the shaft also winds up a return spring (not shown) tending to urge the shaft towards the "OFF" position. The shaft is held in the "ON" position by the cam follower (41) engaging in a notch (20) in the cam.
When power to the electromagnet fails (i.e. normally the power that is switched by the switch), its moving part is thrust by the spring (61) in the direction of arrow 91. This disengages the catch (31) from the bearing surface (51), allowing the first lever to move away from the shaft, and hence disengaging the cam follower from the notch (20). The shaft is then free to return to its "OFF" position under the action of its return spring.

REFERENCES:
patent: 4001740 (1977-01-01), MacLean

Affiliated with

Also associated with

Rating

Rotary switch with an automatic re-setting mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rotary switch with an automatic re-setting mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary switch with an automatic re-setting mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-188940