Line switch assembly for a timing mechanism
AssigneeP. R. Mallory & Co. Inc.
InventorElmo W. Voland
Life of this patent
Estimating the term…
Abstract
A cup shaped hub has an actuator rim at its open end and is rotatably carried on a shaft through an aperture in its closed end. The hub is axially fixed to the shaft such that when the shaft is axially displaced the actuator rim opens and closes a line switch. A ratchet is carried by the shaft and is axially spring biased by a coil spring disposed between the cup shaped hub and the ratchet. A pin carried by the shaft engages the ratchet such that the ratchet may be rotated and axially displaced with the shaft. A coupling means couples the shaft to a cam means rotatably carried by the shaft and the cup shaped hub and includes teeth engaging the ratchet means such that a manual rotation of the shaft provides manual rotation of the cam means.
Claims9
In a timing mechanism wherein a cam means is rotated about a shaft by power drive means to open and close electrical switches responsive to said cam means, wherein said cam means is manually rotatable independent of said power drive means, and wherein a line switch is opened during such manual rotation to break electrical power to said timing means, a mechanism permitting manual rotation of said cam means independent of said power drive means and displacing said line switch to open same comprising:
- (a) line switch actuator means rotatably carried about said shaft including retaining means carried by said shaft and preventing axial displacement of said line switch actuator means with respect to said shaft,
- (b) axially spring biased ratchet means rotatably carried about said shaft,
- (c) first coupling means coupling said shaft to said axially spring biased ratchet means to provide rotation and axial displacement thereof in accordance with a rotation and axial displacement of said shaft, and
- (d) second coupling means coupling said shaft to said cam means and said line switch actuator means, including teeth engaging said spring biased ratchet means.
Dependencies are inferred from the claim text.