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AssigneeRobertshaw Controls Company
InventorsPhilip Hawken, Jerome Klopp, Robert Van der Linde, Paul Tuma
Estimating the term…
A method and apparatus are provided for simultaneously changing multiple liquid level settings in a liquid-level switch including a diaphragm actuated pressure switch apparatus having a first and a second switch, through use of an actuator apparatus including a single control knob shaft rotatably connected to the pressure switch apparatus and having a first and a second cam fixedly attached to the shaft for rotation therewith, the first cam being operatively connected to provide a biasing force against actuation of the first switch, and the second cam being operatively connected to provide a biasing force against actuation of the second switch.
A liquid-level switch, comprising, a diaphragm actuated pressure switch apparatus having a first and a second switch, and a single control knob shaft rotatably connected to the pressure switch apparatus and having a first and a second cam fixedly attached to the shaft for rotation therewith, the first cam being operatively connected to provide a biasing force against actuation of the first switch, and the second cam being operatively connected to provide a biasing force against actuation of the second switch.
An actuator apparatus, for a liquid-level switch including a diaphragm actuated pressure switch apparatus having a first and a second diaphragm actuated switch, the actuator apparatus comprising:
A method for operating a liquid-level switch including a diaphragm actuated pressure switch apparatus having a first and a second switch, the method comprising simultaneously providing predetermined biasing forces to the first and second switches with a single control knob shaft rotatably connected to the pressure switch apparatus and having a first and a second cam fixedly attached to the shaft for rotation therewith, the first cam being operatively connected to provide a biasing force against actuation of the first switch, and the second cam being operatively connected to provide a biasing force against actuation of the second switch.
Dependencies are inferred from the claim text.