Heater control
AssigneeF. F. Seeley Nominees Pty. Ltd.
InventorRobert W. James
Life of this patent
Estimating the term…
Abstract
A heater control for controlling operation of a heater switch (12) in an evaporative cooler having an alternative heater mode in which a heater element (40) is energized and part of the air flow is blanketed by a shutter (37) controlled by a slide (24) or other operator. The slide (24) has a cam face (25) which directly or indirectly compresses a spring (22) as the shutter (41) is closed, the spring (22) otherwise biasing the heater switch (12) to its open contact state, but when the spring (22) is compressed, the switch (12) reverts to its closed contact state to energize the heater element (40).
Claims6
A heater control for controlling operation of a heater switch in an evaporative cooler having shutter means movable between an open free air flow position useable in a cooler mode and a closed part airflow position useable in a heater mode, comprising
- an operator carried by a structure of said cooler coupled to said shutter means and movable to control said shutter means between its said positions,
- a said heater switch being carried by said structure and having an extending actuating finger,
- spring means biasing said switch actuating finger towards an open contact state,
- and a cam face on said operator co-acting with said spring means to compress said spring means and thereby cause said switch to revert to its closed contact state, upon movement of said operator to close said shutter means.
Dependencies are inferred from the claim text.