Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1987-03-23
1988-11-01
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
Specific condition
137554, 200 819R, 7386175, 116274, G08B 2100
Patent
active
047823330
ABSTRACT:
A cylindrical shuttle having a cone-shaped cam surface on one end which slides freely on a timer shaft between a first stop and a second stop which are attached to the shaft. A vane arm driven by a water vane engages the side of the first stop opposite the shuttle. In the normal (no-flow) condition, the vane return spring presses the vane arm against the first stop, which in turn forces the shuttle cam surface against the plungers of two microswitches on either side of the timer shaft, causing the plungers to ride up the cam surface to rest on the shuttle. When water flows, the vane arm releases the first stop and the timer shaft begins to move. After the shaft moves the free distance between the second stop and the shuttle, the second stop engages the shuttle and forces it out from under the plungers. When the plungers reach the cam surface, the shuttle cams out from under the plungers allowing them to release freely and rapidly.
REFERENCES:
patent: 3091758 (1963-05-01), Lewis
Jackson Jill D.
Orsino Joseph A.
Pittway Corporation
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