Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1977-05-27
1979-01-30
Tolin, Gerald P.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
200 83S, H01C 3534
Patent
active
041374347
ABSTRACT:
A pressure responsive device is shown for actuating an electric switch, such device having a port for connection to a source of fluid under pressure, the port being spanned by a diaphragm overlayed by a pressure plate that is adapted directly to actuate a snap action disc spring and a yoke member. An exteriorly adjustable threaded rod extends through the yoke member, and a helical spring has turns at one end threadedly engaging the yoke member, and turns at its other end engaging a shoe element that is threaded onto the rod. As the rod is turned in one direction, the shoe moves towards the inner end of the rod and thereby elongates the spring, i.e., places it in tension. Turning the rod in the opposite direction causes the shoe to move towards the external end of the rod and thereby place the coils of the spring in compression. The disc spring is set to be snap actuated by fluid pressure at a predetermined level intermediate the minimum and maximum pressures over which it is desired to be accommodated by the device, and within which the spring is neither in tension nor compression. The rod is turned to place the helical spring in tension when the device is to be operated at high pressures, and in compression when the device is to be operated at low pressures, and the deadband at all such pressure levels is substantially the same. The inner portion of the disc spring is coupled via a non-friction fulcrum mechanism to a pivotal arm for multiplying the motion of the disc spring and effecting opening and closing of the switch at the limits of the deadband.
REFERENCES:
patent: 2824919 (1958-02-01), Davis
patent: 3535480 (1970-10-01), Bahniuk
patent: 3588395 (1971-06-01), Hersey
Tolin Gerald P.
Turner Perry E.
LandOfFree
Fluid pressure responsive device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluid pressure responsive device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid pressure responsive device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1151730