Lock-out trolley for garage door opener

Locking mechanism for an adjustable spindle drive

Manual and power motivated drive means

Manual override control for double-acting actuator

Manual override for an electronically controlled automatic trans

Manually shifted actuator

Microtome drive

Motorized valve actuator

Passive entry actuator

Portable drive unit for valve actuator

Power feed

Power jack incorporating stress-responsive components

Power opener with manual override

Power transmission apparatus

Powered actuator with manual override feature

Rachet system for hand-held tool

Remote actuator

Remotely engagable power actuator

Retro-fittable tape trip mechanism

Rotary drive transmission mechanism especially for motor vehicle