Radio call unit

Claim 2

In a radio call unit comprising a signal generator and a power source for driving said generator, the improvement wherein said power source comprises a bladed rotatable member, first means linking said rotatable member to said generator for driving said generator, and second manually operable means operative to cause flow of a predetermined volume of fluid against the blades of said rotatable member to cause rotation thereof for a predetermined period of time.

Claim 3

Apparatus as claimed in claim 1 wherein said second means comprises a cylinder having a fluid outlet near one end, a piston disposed for siding movement in said cylinder, and biasing means which bias said piston toward said one end of said cylinder.

Claim 4

Apparatus as claimed in claim 2 wherein said fluid is a liquid and said second means further includes a fluid reservoir and a closed fluid path from said reservoir to said blades and back to said reservoir.

Claim 5

Apparatus as claimed in claim 3 wherein said fluid path comprises a first fluid conduit means connecting said reservoir and said cylinder, valve means in said first conduit means permitting flow of fluid in one direction only in said first conduit means, and second fluid conduit means connecting said cylinder and said reservoir, said blades being disposed to engage fluid flowing in said second conduit means.

Claim 6

Apparatus as claimed in claim 4 wherein said valve means permits flow from said reservoir to said cylinder and said second conduit means comprises said fluid outlet.

Claim 7

Apparatus as claimed in claim 5 wherein said biasing means comprise a spring.

Claim 8

A radio call unit comprising a signal generator; a bladed rotatable member linked to said generator for driving said generator; and manually operable means operative to cause flow of a predetermined volume of fluid against the blades of said rotatable member to cause rotation thereof for a predetermined period of time, said means comprising a cylinder having a fluid outlet near one end, a piston disposed for sliding movement in said cylinder, biasing means which bias said portion toward said one end of said cylinder, conduit means extending between said fluid outlet and a location adjacent the blades of said rotatable member, an exposed swinging door, and linking means Connecting said door to said piston, whereby swinging motion of said door causes said piston to slide in said cylinder against the biasing influence of said biasing means.

Claim 9

A radio call unit comprising a signal generator; a bladed rotatable member linked to said generator for driving said generator; and manually operable means operative to cause flow of a predetermined volume of fluid against the blades of said rotatable member to cause rotation thereof for a predetermined period of time, said means comprising a cylinder having a fluid outlet near one end, a piston disposed for sliding movement in said cylinder, biasing means which bias said portion toward said one end of said cylinder, conduit means extending between said fluid outlet and a location adjacent the blades of said rotatable member, an exposed swinging door, and linking means Connecting said door to said piston, whereby swinging motion of said door causes said piston to slide in said cylinder against the biasing influence of said biasing means.

Claim 10

A radio call unit comprising a signal generator; a bladed rotatable member linked to said generator for driving said generator; and means operative to cause flow of a fluid against the blades of said rotatable member to cause rotation thereof, said means comprising a cylinder having a fluid outlet near one end, a piston disposed for sliding movement in said cylinder, biasing means which bias said portion toward said one end of said cylinder, conduit means extending between said fluid outlet and a location adjacent the blades of said rotatable member, an exposed swinging door, and linking means connecting said door to said piston, whereby swinging motion of said door causes said piston to slide in said cylinder against the biasing influence of said biasing means, said linking means comprising means to disconnect said door from said piston when said door is in a substantially fully opened position and to re-engage said piston and said door when said door is in a closed position and said piston has returned to its reset position under the influence of said biasing means.

Claim 11

A radio call unit comprising a signal generator; a bladed rotatable member linked to said generator for driving said generator; and means operative to cause flow of a fluid against the blades of said rotatable member to cause rotation thereof, said means comprising a cylinder having a fluid outlet near one end, a piston disposed for sliding movement in said cylinder, biasing means which bias said portion toward said one end of said cylinder, conduit means extending between said fluid outlet and a location adjacent the blades of said rotatable member, an exposed swinging door, and linking means connecting said door to said piston, whereby swinging motion of said door causes said piston to slide in said cylinder against the biasing influence of said biasing means, said linking means comprising means to disconnect said door from said piston when said door is in a substantially fully opened position and to re-engage said piston and said door when said door is in a closed position and said piston has returned to its reset position under the influence of said biasing means.

Claim 12

Apparatus as claimed in claim 8 further including means to maintain said piston in the position it assumes with respect to said cylinder upon the completion of the swinging open of said door and to release said piston at a time chosen by the operator of the radio call box.

Claim 13

Apparatus as claimed in claim 9 wherein said fluid is a liquid and said unit further includes a fluid reservoir and a closed fluid path from said reservoir to said cylinder to said blades and back to said reservoir.