:: : : : : Without seeing SteveBaker's machine, I think using limit switches mounted on wood as a length standard is not a good idea.
32.
-- When a heater's limit switch trips because the heater has become too hot, the heater needs to stay off until a person manually turns it on.
33.
The snap-switch mechanism can be enclosed in a metal housing including actuating levers, plungers or rollers, forming a limit switch useful for control of machine tools or electrically-driven machinery.
34.
Hydraulic pressure for retraction and extension of the gear is transmitted by a system of tubing, hoses and actuating cylinders and is electrically controlled by limit switches and solenoid valves.
35.
The patent was on the combination patent of three thermostatic switches, not on any of the switches alone and not on the combination of the fan switch and the limit switch.
36.
Therefore, on first power up, the controller will have to activate the stepper motor and turn it to a known position, e . g . until it activates an end limit switch.
37.
Limit switches on the power unit control the distance the garage door opens and closes once the motor receives a signal from the remote control or wall push button to operate the door.
38.
Another thermostat ( or limit switch ) opens the stoker circuit when the air in the furnace reaches a predetermined temperature, irrespective of the fact that the room thermostat may still call for heat.
39.
An example is a garage door with two " limit switches ", one for UP labelled SW _ U and one for DOWN labelled SW _ D, and whatever else is in the door's circuitry.
40.
But, at that point, it starts the fan, which continues to run, even though the limit switch has stopped the stoker, so long as the furnace is hot and the room thermostat calls for heat.
