Cable-actuated emergency stop switch

Details Cable-actuated emergency stop switch Cable-actuated emergency stop switch

1989-03-20

1991-08-20

Scott, J. R.

Electricity: circuit makers and breakers

Special application

200543, H01H 1700, H01H 3500

Patent

active

050417053

ABSTRACT:
A piston operated by a cable stretched out within hand reach along a dangerous zone actuates a tappet whose movements are transmitted to a slider. The slider in turn compresses a spring until in a first phase, before any switch actuation, a pawl engages a groove in the slider. This prevents return of the tappet to its rest position, whereby any attempt to simulate a machine breakdown by fraudulent actuation of the device leaves a trace in the device even before effective switch actuation has occurred. In a second phase the force of the spring exceeds the force necessary to retract locking pins of a striker which is therefore released abruptly to operate the switch. To restore the device to its standby state, a lock plug carrying a cam adapted to release the pawl from the groove in the slider is rotated by means of a key.

REFERENCES:
patent: 4458122 (1984-07-01), Knight

Affiliated with

Also associated with

Rating

Cable-actuated emergency stop switch does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cable-actuated emergency stop switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cable-actuated emergency stop switch will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1010003