Control unit having adjustable differential and method of making the same
AssigneeRobertshaw Controls Company
InventorEdward P. Cumming
Life of this patent
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Abstract
A control unit having a condition selector, an actuator and a condition responsive device for actuating the actuator when the condition responsive device senses a condition selected by said selector. A lever is carried by the unit and has opposed ends respectively operatively associated with the actuator and the device. The selector has an adjustable part thereof engageable with the lever intermediate the ends thereof for providing a pivot point for the lever. The adjustable part of the selector is adapted to adjust the differential in the operation of the actuator by the device, the adjustable part providing for a positive differential or for a negative differential.
Claims15
In a control unit having a condition selector means, an actuator and a condition responsive device for actuating said actuator when said condition responsive device senses a condition selected by said selector means, the improvement comprising a lever carried by said unit and being operatively associated with said actuator and said device whereby said device can actuate said actuator by said lever, said selector means having an adjustable part thereof engageable with said lever for providing a pivot point for said lever, said adjustable part having an adjustable lost motion with said selector means and thereby being adapted to adjust the differential in the operation of said actuator by said device through the adjustment of said lost motion thereof.
In a control unit having a condition selector means, an actuator and a condition responsive device for actuating said actuator when said condition responsive device senses a condition selected by said selector means, the improvement comprising a lever carried by said unit and having opposed ends respectively operatively associated with said actuator and said device, said selector means having an adjustable part thereof engageable with said lever intermediate said ends thereof for providing a pivot point for said lever, said adjustable part having an adjustable lost motion with said selector means and thereby being adapted to adjust the differential in the operation of said actuator by said device through the adjustment of said lost motion thereof.
Dependencies are inferred from the claim text.