Rotary drive mechanism
AssigneeTektronix, Inc.
InventorH. Erwin Grellmann
Life of this patent
Estimating the term…
Abstract
A rotary drive mechanism has a yoke mounted on a motor shaft which engages a crank connected to a device to be rotated, such as the rotary portion of a microwave switch. When the gear motor is activated, the yoke causes the crank to move from a first position to a position past top dead center. A spring connected to the crank causes the crank to snap from the position past top dead center to a second position. A microswitch at the second position provides a signal to brake the motor when the crank reaches the second position. The yoke is configured like a V with the attachment point to the motor being the base of the V. A post from the crank is contained within the area defined by the legs of the V at a point where the shaft will not contact the opposite leg when the crank passes top dead center and is snapped to the second position.
Claims5
A rotary drive mechanism comprising:
- a crank connected to a device to be rotated;
- means for positively engaging the crank to start movement of the crank;
- means for driving the engaging means such that the crank moves from a first position to a position past top dead center;
- and
- means for moving the crank from the position past top dead center to a second position independent of the driving means.
Dependencies are inferred from the claim text.