Timer clutch
AssigneeThe Singer Company
InventorGuy A. Wojtanek
Life of this patent
Estimating the term…
Abstract
When the axially movable shaft mounted in the hub of a program cam drum is moved inwardly a pin loosely mounted in a cross hole on the shaft will move into engagement with teeth on a drive sleeve mounted between the shaft and the drum hub while a washer fixed on the end of the shaft moves to actuate a slider which then actuates and opens a line switch to take power off the appliance controlled by the timer. Engagement of the pin with the sleeve completes the drive to the sleeve and the sleeve is keyed to the drum by lugs projecting to slots in the hub. Now the shaft can rotate the timer drum without power applied to the appliance. When the shaft is pulled out, the line switch closes and the drive pin is disengaged from the teeth and rotation of the shaft is not effective to rotate the timer.
Claims5
In a timer including a program cam drum having a hollow hub rotatably mounted between support plates, a shaft mounted in said drum for axial movement between first and second positions, switch means for controlling the application of power to said timer, and switch actuating means on one end of the shaft, the improvement comprising,
- a sleeve between the shaft and the drum hub adjacent said one end of the shaft,
- means rotatably connecting the sleeve to the drum hub,
- a plurality of axially extending teeth on one end of the sleeve, and
- a pin mounted in a transverse hole through the shaft inside the hub, the pin being free to rotate within the hole and retained lengthwise in the hole by engagement of its ends with the interior of the hub,
- said pin being axially spaced from the confronting end of the sleeve in said first axial position of the shaft and engaging said teeth in the end of the sleeve when the shaft is in said second axial position.
Dependencies are inferred from the claim text.