Control unit having an 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 method of making 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 the steps of disposing a lever in said unit so as to be operatively associated with said actuator and said device whereby said device can actuate said actuator by said lever, forming said selector means with an adjustable part thereof that is engageable with said lever for providing a pivot point for said lever, forming said adjustable part to have an adjustable lost motion with said selector means, and adjusting said adjustable part to adjust said adjustable lost motion thereof and thus the differential in the operation of said actuator by said device.
In a method of making 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 the steps of disposing a lever in said unit to have opposed ends respectively operatively associated with said actuator and said device, forming said selector means with an adjustable part thereof engageable with said lever intermediate said ends thereof for providing a pivot point for said lever, forming said adjustable part to have an adjustable lost motion with said selector means, and adjusting said adjustable part to adjust said adjustable lost motion thereof and thus the differential in the operation of said actuator by said device.
Dependencies are inferred from the claim text.