Patent US3764874A successfully refreshed from Google Patents.
US3764874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Garage door opener with instant reverse mechanism
Assignee: Stanley Works
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Filing: 1972-02-07
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Granted: 1973-10-09
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Expires: 1992-02-07
Abstract
Abstract An electrical operator assembly for garage doors and the like includes a reversible electric motor, a belt member and means deflecting the belt member from a straight line path. When the door operated by the assembly encounters an obstruction, the belt member overcomes the deflecting pressure and operates reversing switch means to reverse the direction of operation of the electric motor. The control circuitry includes a multiposition relay adapted to reverse the direction of operation of the motor upon change of the contacts closed therein when a signal is received from the reversing switch which transmits its signal directly to the relay. In addition, a disabling switch is directly responsive to operation of the drive means after a preselected period of travel in one direction to disable the reversing switch and prevent its transmission of a signal to the motor when the door approaches the end of its preselected period of travel in that direction. The motor remains in closed circuit contact with the relay means during reversal of direction by the reversing switch.
Inventors
- 👤 D Geoffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:48
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/40; E05F15/41; E05F15/60; E05F15/603; E05F15/665; E05F15/668; E05F15/681; E05F15/684; E05Y; E05Y2201/00; E05Y2201/60; E05Y2201/622; E05Y2201/644; E05Y2201/656; E05Y2201/658; E05Y2201/66; E05Y2201/672; E05Y2400/00; E05Y2400/10; E05Y2400/44; E05Y2400/445; E05Y2400/52; E05Y2400/53; E05Y2400/54; E05Y2400/55; E05Y2400/552; E05Y2400/57; E05Y2600/00; E05Y2600/10; E05Y2600/30; E05Y2600/32; E05Y2600/322; E05Y2800/00; E05Y2900/00; E05Y2900/10; E05Y2900/106
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
477 words
In an electrical operator assembly for doors and the like, the combination comprising: a. a support; b. a reversible electric motor on said support; c. a belt member mounted for rotation on said support in either direction of rotation; d. drive means on said support interconnecting said motor and said belt member to effect rotation thereof in either direction, said belt member extending about said drive means to define a substantially U-shaped portion with spaced legs to opposite sides of said drive means; e. means deflecting a leg portion of said belt member from a straight line path towards the opposite leg and including an elongated deflecting member pivoted at one end on said support and having its opposite end portion slidably engaged with said belt member and spring means biasing said opposite end portion of said deflecting member towards said belt member, said belt member being adapted to overcome the biasing force of said biasing means upon movement over said deflecting member towards the pivoted end thereof and the encountering of an obstruction by the associated door operated thereby to return to a substantially straight line path to pivot the elongated deflecting member away from said opposite leg of said belt member, said biasing means being closely adjustable to control the biasing force required to be overcome by said belt member to effect movement of said belt member to a straight line path; f. reversing switch means engageable by said deflecting member upon pivoting thereof and operable to generate a signal upon overcoming of the biasing force of said biasing means; and g. control circuitry for said motor including: 1. limit switch means responsive to operation of and directly actuated by said drive means to discontinue operation of said motor after a preselected period of travel of said belt member in either direction of rotation; 2. disabling switch means directly actuated by said said drive means after movement thereof for a preselected period of travel in one direction, said preselected period of travel being less than the preselected period of travel for the motor discontinuing limit switch means in that direction; and 3. multiposition relay means controlling current flow to said motor to reverse the direction of operation thereof upon change of the contacts closed therein, said reversing switch means sending an electrical signal directly to said relay to change the contacts closed therein and thereby change the direction of rotation of said motor upon the encountering of an obstruction by the associated door, said motor remaining in closed circuit contact with said relay means during reveRsal of direction by operation of said reversing switch means, said disabling switch means opening the circuit for said reversing switch means to prevent generation of a signal thereby to said relay means when said drive means approaches the end of its preselected period of travel in said one direction.
Claim 2
Dependent Claim
477 words
In an electrical operator assembly for doors and the like, the combination comprising: a. a support; b. a reversible electric motor on said support; c. a belt member mounted for rotation on said support in either direction of rotation; d. drive means on said support interconnecting said motor and said belt member to effect rotation thereof in either direction, said belt member extending about said drive means to define a substantially U-shaped portion with spaced legs to opposite sides of said drive means; e. means deflecting a leg portion of said belt member from a straight line path towards the opposite leg and including an elongated deflecting member pivoted at one end on said support and having its opposite end portion slidably engaged with said belt member and spring means biasing said opposite end portion of said deflecting member towards said belt member, said belt member being adapted to overcome the biasing force of said biasing means upon movement over said deflecting member towards the pivoted end thereof and the encountering of an obstruction by the associated door operated thereby to return to a substantially straight line path to pivot the elongated deflecting member away from said opposite leg of said belt member, said biasing means being closely adjustable to control the biasing force required to be overcome by said belt member to effect movement of said belt member to a straight line path; f. reversing switch means engageable by said deflecting member upon pivoting thereof and operable to generate a signal upon overcoming of the biasing force of said biasing means; and g. control circuitry for said motor including: 1. limit switch means responsive to operation of and directly actuated by said drive means to discontinue operation of said motor after a preselected period of travel of said belt member in either direction of rotation; 2. disabling switch means directly actuated by said said drive means after movement thereof for a preselected period of travel in one direction, said preselected period of travel being less than the preselected period of travel for the motor discontinuing limit switch means in that direction; and 3. multiposition relay means controlling current flow to said motor to reverse the direction of operation thereof upon change of the contacts closed therein, said reversing switch means sending an electrical signal directly to said relay to change the contacts closed therein and thereby change the direction of rotation of said motor upon the encountering of an obstruction by the associated door, said motor remaining in closed circuit contact with said relay means during reveRsal of direction by operation of said reversing switch means, said disabling switch means opening the circuit for said reversing switch means to prevent generation of a signal thereby to said relay means when said drive means approaches the end of its preselected period of travel in said one direction.
Claim 3
Dependent Claim
151 words
The electrical operator assembly of claim 1 wherein said relay means comprises a two-position relay having a member moveable between said two positions, a solenoid coil, and an armature acted upon by said solenoid coil to move said moveable member from one position to the other, said moveable member being latched in position until moved therefrom by action of said solenoid, and wherein said motor comprises a reversible motor having two windings and wherein the contacts of said relay in said positions thereof are each connected directly to one of said coils whereby the direction of rotation of said motor may be varied by changing the position of said relay, and wherein there is included means connecting said two windings of said motor to supply current 90* out of phase to the winding of said motor not directly receiving current through the contact of the relay in the operative position thereof.
Claim 4
Dependent Claim
46 words
disabling switch means directly actuated by said said drive means after movement thereof for a preselected period of travel in one direction, said preselected period of travel being less than the preselected period of travel for the motor discontinuing limit switch means in that direction; and
Claim 5
Dependent Claim
46 words
disabling switch means directly actuated by said said drive means after movement thereof for a preselected period of travel in one direction, said preselected period of travel being less than the preselected period of travel for the motor discontinuing limit switch means in that direction; and
Claim 6
Dependent Claim
68 words
The electrical operator assembly of claim 2 wherein said limit switch means in said control circuitry comprises separate limit switches disposed in the circuits between the separate coils of said motor and said contacts of said relay in the two positions thereof, whereby opening of either of the limit switches in the closed circuit will discontinue flow of current to said motor and terminate operation of the assembly.
Claim 7
Dependent Claim
123 words
multiposition relay means controlling current flow to said motor to reverse the direction of operation thereof upon change of the contacts closed therein, said reversing switch means sending an electrical signal directly to said relay to change the contacts closed therein and thereby change the direction of rotation of said motor upon the encountering of an obstruction by the associated door, said motor remaining in closed circuit contact with said relay means during reveRsal of direction by operation of said reversing switch means, said disabling switch means opening the circuit for said reversing switch means to prevent generation of a signal thereby to said relay means when said drive means approaches the end of its preselected period of travel in said one direction.
Claim 8
Dependent Claim
123 words
multiposition relay means controlling current flow to said motor to reverse the direction of operation thereof upon change of the contacts closed therein, said reversing switch means sending an electrical signal directly to said relay to change the contacts closed therein and thereby change the direction of rotation of said motor upon the encountering of an obstruction by the associated door, said motor remaining in closed circuit contact with said relay means during reveRsal of direction by operation of said reversing switch means, said disabling switch means opening the circuit for said reversing switch means to prevent generation of a signal thereby to said relay means when said drive means approaches the end of its preselected period of travel in said one direction.
Claim 9
Dependent Claim
44 words
The electrical operator assembly of claim 1 wherein said biasing means comprises a compression spring acting upon the opposite end portion thereof to bias said opposite end portion toward said belt member and threaded adjusting means to closely adjust the biasing force exerted thereby.
Claim 10
Dependent Claim
48 words
The electrical operator assembly of claim 1 wherein said disabling switch means and said reversing switch means are in series with current flow to said reversing switch being through the disabling switch in its normally closed position, said disabling switch means opening to disable said reversing switch means.
Claim 11
Dependent Claim
128 words
The electrical operator assembly of claim 1 wherein said drive means includes a shaft member having a threaded portion and a threaded member mounted thereon, said support including means to prevent rotation of said threaded member whereby rotation of said shaft will produce movement of said threaded member along the length thereof; and wherein said limit switch means is actuated by said threaded member during movement thereof to a preselected distance along the length of said threaded portion, wherein said limit switch means comprises a pair of limit switches, and wherein there are provided a pair of threaded members at spaced points along the length of said threaded portion each acting upon one of said pair of limit switches at either extreme of the preselected period of travel.
Claim 12
Dependent Claim
60 words
The electrical operator assembly of claim 6 wherein said pair of limit switches and said disabling switch are mounted adjacent each other and each has an actuator arm, one of said threaded members acting upon the actuator arm of said disabling switch means shortly before acting upon the actuator arm of the limit switch in the same direction of travel.
References Cited (Backward Citations)
US3474317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |