Garage door up-returner and circuit breaker

Claim 2

In a door-operator, a door, a reversible motor and drive shaft, connections between said motor and said door for driving said door in a direction toward opening of door, and for driving said door in a direction for closing of door, a threaded quill keyed to said shaft, a threaded traveler matched to the thread of said quill, for moving to-and-fro lengthwise of said quill, shoulders on said shaft, one at each end of said quill, for confining said quill, and for affording a limit to movement of said traveler at each end of said quill, and for locking together said threads of quill and traveler when said traveler reaches either limit; for causing said locked traveler and quill to move in unison with said motor shaft in an arc for up-returning and circuit breaking; an arm extending radially from the perimeter of said traveler, shifters sidewise of said motor drive shaft connections between said arm and said shifters for throwing said shifters clockwise, connections between Said shifters and a reversing switch for obtaining in said clockwise throw a direction of rotation at said motor for producing an upward dooropening drive, for returning into open position an obstructed downward-moving door.

Claim 3

The combination of claim 1 with a finger extending radially from the perimeter of said traveler, connections between said finger and an arresting trapeze for immobilizing said trapeze in concert with said clockwise throw of said shifters.

Claim 4

The combination of claim 2 with a circuit breaker comprising dual electric switches, one said switch with a circuit-opening pushbutton in the path of said arm moving counterclockwise, the other said switch with a circuit-opening pushbutton in the path of said finger moving clockwise.

Claim 5

The combination of claim 3 with exposed pushbuttons pressed by a person''s finger for restoring to current-carrying condition said circuit opened by said arm or by said finger.

Claim 6

The combination of claim 2 with an arm extending radially from said traveler, for moving clockwise in up-returning and for moving counterclockwise in circuit breaking; and with a finger for moving clockwise in immobilizing said trapeze in up-returning and for moving further clockwise in circuit breaking.

Claim 7

In a door-operator, a door, a reversible motor with a drive shaft and a sheave for driving an endless belt, connections between said belt and said door for driving said door in a direction toward opening of said door, and for driving said door in a direction toward closing of said door, a circuit for conducting electric current to and from said motor, a switch in the circuit for controlling the directions of movement of said door, said switch including two stationary termini, each terminus holding two current-conducting terminals of opposite polarities, said switch including also a tongue movable from one terminus to the other and bearing two current-conducting billets arranged to make circuit-closing electrical contacts with said terminals at one of said termini for causing at said motor a direction of rotation to drive said door in said upward direction, and arranged to make circuit-closing electrical contacts with said terminals at the other of said termini for causing at said motor a direction of rotation to drive said door in said downward direction when said billets on said tongue make contact with said terminals on said other terminus, said tongue being of wire wound in spiral circlings tensioned to press circling-to-circling as in an extension-spring.

Claim 8

In a door-operator, a door, a reversible motor with a drive shaft and a sheave for driving an endless belt, connections between said belt and said door for driving said door in a direction toward opening of said door, and for driving said door in a direction toward closing of said door, a circuit for conducting electric current to and from said motor, a switch in the circuit for controlling the directions of movement of said door, said switch including two stationary termini, each terminus holding two current-conducting terminals of opposite polarities, said switch including also a tongue movable from one terminus to the other and bearing two current-conducting billets arranged to make circuit-closing electrical contacts with said terminals at one of said termini for causing at said motor a direction of rotation to drive said door in said upward direction, and arranged to make circuit-closing electrical contacts with said terminals at the other of said termini for causing at said motor a direction of rotation to drive said door in said downward direction when said billets on said tongue make contact with said terminals on said other terminus, said tongue being of wire wound in spiral circlings tensioned to press circling-to-circling as in an extension-spring.

Claim 9

The combination of claim 6 with a series of essential parts of suitable material fitted onto said wire-wound tongue.

Claim 10

The combination of claim 6 in which said billet-carrying arrangement includes a recess in which two electricity conducting wires brought through the tube-canal of said tongue make connection with said electrically conducting billets.

Claim 11

The combination of claim 6 in which each of said two termini pivots freely on a supporting stand.

Claim 12

In a door operator, a door, a reversible motor with door-drive connections for driving said door in an upward direction towards open position and in an opposite downward direction towards closed position; a circuit for conveying electric current to and from said motor, a switch in said circuit arranged for conducting said current to said motor in a polarity essential to an alternative order of succession (opening-closing opening-closing) for causing rotation of said motor in a counterclockwise direction for door-opening, and for causing rotation of said motor in a clockwise direction for door-closing; said switch including a tongue wound cylindrically from suitable wire in spiral circlings as for an extension-spring, said tongue bearing current-carrying conductors for energizing said motor, means for breaking said circuit and stopping said motor; arresting means for holding said tongue and said current-carrying conductors short of making circuit-closing contacts, means for dislodging said arresting means, signalling means for activating said dislodging means, and means for restoring said breaking of said circuit, and for re-energizing said motor with current of said polarity for rotating said motor in one of said directions for effecting door-movement according to said alternative order of succession.

Claim 13

In a door operator, a door, a reversible motor with door-drive connections for driving said door in an upward direction towards open position and in an opposite downward direction towards closed position; a circuit for conveying electric current to and from said motor, a switch in said circuit arranged for conducting said current to said motor in a polarity essential to an alternative order of succession (opening-closing opening-closing) for causing rotation of said motor in a counterclockwise direction for door-opening, and for causing rotation of said motor in a clockwise direction for door-closing; said switch including a tongue wound cylindrically from suitable wire in spiral circlings as for an extension-spring, said tongue bearing current-carrying conductors for energizing said motor, means for breaking said circuit and stopping said motor; arresting means for holding said tongue and said current-carrying conductors short of making circuit-closing contacts, means for dislodging said arresting means, signalling means for activating said dislodging means, and means for restoring said breaking of said circuit, and for re-energizing said motor with current of said polarity for rotating said motor in one of said directions for effecting door-movement according to said alternative order of succession.

Claim 14

In a door-operator, a door, a reversible motor having a drive shaft and a sheave with a groove around the periphery of said sheave, for driving an endless belt, said belt having an upper strand at an upper side of passage into and out of said groove, and having a lower strand at a lower side of passage into and out of said groove, connections between said belt and said door for driving said door in an upward direction toward opening said door, and for driving said door in a downward direction toward closing said door; an electric supply circuit to said motor, a reversing switch in said circuit, said switch having a tongue for making conductor contacts for alternating the polarity of electric current to said motor for driving said door in said upward direction, and alternatively in said downward direction; shifters and connections between said sheave and said switch for alternatively throwing said tongue; and upper shipper-button adjustable in its position lengthwise of said upper strand and locked onto said upper strand of said belt, and a lower shipper-button adjustable in its position lengthwise of said lower strand and locked into position on said lower strand, for governing said alternative throwing of said tongue; a follow-arm, and a follow-spring, biased to bear upon slack in said upper strand; stretchable means within said lower strand for yielding, to the drive of said sheave, a length of said lower strand in event of an obstructed downward moving door, and for transfering said length into a slack in said upper strand for accommodating to follow-pressure of said follow-arm and for drawing said shifters to throw said tongue into making said door-opening conductor contacts for causing said obstructed door to return upward into said open position.

Claim 15

In a door-operator, a door, a reversible motor having a drive shaft and a sheave with a groove around the periphery of said sheave, for driving an endless belt, said belt having an upper strand at an upper side of passage into and out of said groove, and having a lower strand at a lower side of passage into and out of said groove, connections between said belt and said door for driving said door in an upward direction toward opening said door, and for driving said door in a downward direction toward closing said door; an electric supply circuit to said motor, a reversing switch in said circuit, said switch having a tongue for making conductor contacts for alternating the polarity of electric current to said motor for driving said door in said upward direction, and alternatively in said downward direction; shifters and connections between said sheave and said switch for alternatively throwing said tongue; and upper shipper-button adjustable in its position lengthwise of said upper strand and locked onto said upper strand of said belt, and a lower shipper-button adjustable in its position lengthwise of said lower strand and locked into position on said lower strand, for governing said alternative throwing of said tongue; a follow-arm, and a follow-spring, biased to bear upon slack in said upper strand; stretchable means within said lower strand for yielding, to the drive of said sheave, a length of said lower strand in event of an obstructed downward moving door, and for transfering said length into a slack in said upper strand for accommodating to follow-pressure of said follow-arm and for drawing said shifters to throw said tongue into making said door-opening conductor contacts for causing said obstructed door to return upward into said open position.

Claim 16

The combination of claim 11 with said tongue wound cylindrically of wire in spiral circlings tensioned to press circling-to-circling as in an extension-spring.

Claim 17

The combination of claim 11 with essential operative parts mounted onto the periphery of said tongue.