Push-pull handwheel and motor drive

Claim 1

A MECHANICAL DRIVE COMPRISING: A TUBULAR HOUSING; A SHAFT WITHIN SAID HOUSING TO BE DRIVEN ROTATIONALLY; A POWER DRIVE NORMALLY CONNECTED TO SAID SHAFT; A HANDWHEEL DRIVE NORMALLY DISCONNECTED FROM BUT CONNECTABLE TO SAID SHAFT BY AXIAL MOVEMENT OF SAID HANDWHEEL IN ONE DIRECTION, SAID HANDWHEEL DRIVE INCLUDING A TUBULAR DRIVE SLEEVE DISPOSED CO-AXIALLY WITHIN SAID HOUSING AND ENCIRCLING SAID SHAFT AT SPACED SEPARATION THEREFROM, SAID HANDWHEEL DRIVE SLEEVE HAVING INTERNAL SPLINES PROJECTING INTO ITS BORE FOR A LIMITED AXIAL PORTION THEREOF; A COUPLING FIXED ON SAID SHAFT AGAINST ANGULAR MOVEMENT BUT ADAPTED FOR LIMITED AXIAL MOVEMENT, SAID COUPLING BEING NORMALLY DISPLACED AXIALLY FROM AND OUT OF ENGAGEMENT WITH SAID SPLINE PORTION OF SAID HANDWHEEL DRIVE SLEEVE BUT ADAPTED TO BE PLACED INTO ENGAGEMENT THEREWITH BY MOVEMENT OF SAID HANDWHEEL DRIVE SLEEVE AXIALLY IN SAID ONE DIRECTION; SWITCH MEANS ELECTRICALLY CONNECTED TO SAID POWER DRIVE AND HAVING A PLUNGER PROTRUDING FROM SAID HOUSING; A SWITCH FLANGE HAVING A SKIRT PORTION DISPOSED TO MECHANICALLY OPERATE SAID SWITCH PLUNGER IN RESPONSE TO AXIAL MOVEMENT OF SAID SWITCH FLANGE, SAID SWITCH FLANGE HAVING A TUBULAR SLEEVE PORTION DISPOSED CO-AXIALLY WITHIN SAID HOUSING AND LOCATED CONCENTRICALLY BETWEEN SAID HOUSING AND SAID HANDWHEEL DRIVE SLEEVE; LOCKING MEANS NORMALLY TENDING TO LOCK SAID SWITCH FLANGE SLEEVE AXIALLY IN RELATION TO SAID HOUSING, SAID LOCKING MEANS BEING RELEASABLE IN RESPONSE TO FORCE APPLIED THERETO RESULTING