US3833818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device and system
Assignee: Deltral Corp
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Filing: 1973-01-08
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Granted: 1974-09-03
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Expires: 1993-01-08
Abstract
Abstract A heavy duty contactor mechanism for refrigeration compressor motors is directly actuated by a timing mechanism controlled by a thermostat. The timing mechanism protects against false starts from thermostat vibration, and interposes a delay between stopping and starting of the compressor sufficient to allow pressures to equalize. Power for operating the contactor switches is stored in a spring while the timer motor is running through the delay period.
Inventors
- 👤 J Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:38
CPC Classifications
F; F25; F25B; F25B49/00; H; H01; H01H; H01H7/00; H01H7/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
271 words
In a control system for a power operated device, the combination of, a power source for energizing said device, a load switch controlling the power to said device, said load switch having an operator movable between two positions, one position causing closure of the load switch and the other causing opening thereof, means for mechanically actuating said switch operator, said actuating means including timing means having a timer motor, spring means wound by the timer motor, closing means actuated by the spring means for actuating said operator to close the switch, and opening means capable of actuating the switch operator to open the switch instantly after closure thereof and without requiring operation of the timer motor, control means for the timing means capable of starting and stopping the same, means including an electro-magnet mechanically associated with said control means and said opening means in a manner to open the load switch and allOw operation of the timing means when the electromagnet moves in a first direction, said electro-magnet also being movable in a second direction, and master control means associated with said electro-magnet, said master control means being arranged on assuming a first condition to cause movement of the electro-magnet in the second direction and start the timing means, means operated by the timing means for actuating said closing means a period of time thereafter, means for stopping the timing means after the load switch closes, said master control means being arranged on assuming a second condition to cause movement of the electro-magnet in the first direction, thereby opening the load switch and placing the timing means in condition for operation.
Claim 2
Dependent Claim
271 words
In a control system for a power operated device, the combination of, a power source for energizing said device, a load switch controlling the power to said device, said load switch having an operator movable between two positions, one position causing closure of the load switch and the other causing opening thereof, means for mechanically actuating said switch operator, said actuating means including timing means having a timer motor, spring means wound by the timer motor, closing means actuated by the spring means for actuating said operator to close the switch, and opening means capable of actuating the switch operator to open the switch instantly after closure thereof and without requiring operation of the timer motor, control means for the timing means capable of starting and stopping the same, means including an electro-magnet mechanically associated with said control means and said opening means in a manner to open the load switch and allOw operation of the timing means when the electromagnet moves in a first direction, said electro-magnet also being movable in a second direction, and master control means associated with said electro-magnet, said master control means being arranged on assuming a first condition to cause movement of the electro-magnet in the second direction and start the timing means, means operated by the timing means for actuating said closing means a period of time thereafter, means for stopping the timing means after the load switch closes, said master control means being arranged on assuming a second condition to cause movement of the electro-magnet in the first direction, thereby opening the load switch and placing the timing means in condition for operation.
Claim 3
Dependent Claim
41 words
The combination recited in claim 1 in which energization of the electro-magnet by said master control means causes the electro-magnet to move in said second direction causing the timing means to run on its closure cycle to close the load switch.
Claim 4
Dependent Claim
31 words
The combination recited in claim 1 in which the means for instantly opening the load switch is powered independently of the electro-magnet and places the timing means in condition for operation.
Claim 5
Dependent Claim
152 words
In a control for a power operated device, the combination of, a main switch for controlling the power to said device, an electro-magnet, timing means including a timer motor and a timer motor switch therefore, means actuated by the electro-magnet on movement to a first position when the main switch is open for closing the timer motor switch to start the timing means, means actuated by the timing means after a period of time to close the main switch, means for opening the timer motor switch with the electro-magnet still in its first position after the main switch closes, means actuated by movement of the electro-magnet from the first position to the second position for opening said main switch independently of the timer motor, and means actuated upon opening of the main switch for rendering the electro-magnet capable of closing the timer motor switch when the electro-magnet again assumes its first position.
Claim 6
Dependent Claim
152 words
In a control for a power operated device, the combination of, a main switch for controlling the power to said device, an electro-magnet, timing means including a timer motor and a timer motor switch therefore, means actuated by the electro-magnet on movement to a first position when the main switch is open for closing the timer motor switch to start the timing means, means actuated by the timing means after a period of time to close the main switch, means for opening the timer motor switch with the electro-magnet still in its first position after the main switch closes, means actuated by movement of the electro-magnet from the first position to the second position for opening said main switch independently of the timer motor, and means actuated upon opening of the main switch for rendering the electro-magnet capable of closing the timer motor switch when the electro-magnet again assumes its first position.
Claim 7
Dependent Claim
257 words
In a control system for a power operated device, the combination of, a power source for energizing said device, a load switch controlling the power to said device, said load switch having an operator movable between two positions, one position causing closure of the load switch and the other position causing opening thereof, means for actuating said switch operator, said actuating means including a timer motor, spring means wound by said timer motor, closing means actuated by the spring means for actuating the operator to close the switch and opening means capable of actuating the switch operator to open said switch instantly after closure thereof and without requiring operation of the timer motor, a timer motor switch connected to the timer motor, means includng an electro-magnet mechanically associated with said timer motor switch and said opening means in a manner to open the load switch and close the timer motor switch when the electro-magnet moves in one direction, said electro-magnet also being movable in a second direction, and master control means associated with said electro-magnet, said master control means being arranged on assuming a first condition to cause movement of the electro-magnet in the second direction and start the timer motor, means operated by the timer motor actuating said closing means a period of time thereafter, means for opening the timer motor switch after the load switch closes, said master control means, on assuming a second condition, causing movement of the electro-magnet in the first direction to open the load switch and close the timer motor switch.
Claim 8
Dependent Claim
257 words
In a control system for a power operated device, the combination of, a power source for energizing said device, a load switch controlling the power to said device, said load switch having an operator movable between two positions, one position causing closure of the load switch and the other position causing opening thereof, means for actuating said switch operator, said actuating means including a timer motor, spring means wound by said timer motor, closing means actuated by the spring means for actuating the operator to close the switch and opening means capable of actuating the switch operator to open said switch instantly after closure thereof and without requiring operation of the timer motor, a timer motor switch connected to the timer motor, means includng an electro-magnet mechanically associated with said timer motor switch and said opening means in a manner to open the load switch and close the timer motor switch when the electro-magnet moves in one direction, said electro-magnet also being movable in a second direction, and master control means associated with said electro-magnet, said master control means being arranged on assuming a first condition to cause movement of the electro-magnet in the second direction and start the timer motor, means operated by the timer motor actuating said closing means a period of time thereafter, means for opening the timer motor switch after the load switch closes, said master control means, on assuming a second condition, causing movement of the electro-magnet in the first direction to open the load switch and close the timer motor switch.
Claim 9
Dependent Claim
225 words
In a control system for a power operated device, the combination of, a power source for energizing said device, a load switch arranged to control the power to said device, a timer motor, means including a single throw type timer motor switch for stopping and starting the timer motor, An electro-magnet arranged to mechanically operate said timer motor switch, closing the same upon movement of the electro-magnet in one direction, control means connected to the electro-magnet for controlling the same and arranged to selectively energize and deenergize said electro-magnet, causing it to move in said one direction or the opposite direction, said timer motor switch and timer motor being connected across a source of power independently of said control means, thereby causing operation of the timer motor at any time when the timer motor switch is closed, independently of said control means, means operated by the timer motor for closing the load switch after a predetermined closure cycle of the timer motor switch, means for opening the timer motor switch to stop the timer motor after closure of the load switch, means operated by movement of the electro-magnet in said opposite direction for opening the load switch instantly and reclosing the timer motor switch, and means operated by the timer motor for reopening the timer motor switch after a period of time of closure thereof.
Claim 10
Dependent Claim
225 words
In a control system for a power operated device, the combination of, a power source for energizing said device, a load switch arranged to control the power to said device, a timer motor, means including a single throw type timer motor switch for stopping and starting the timer motor, An electro-magnet arranged to mechanically operate said timer motor switch, closing the same upon movement of the electro-magnet in one direction, control means connected to the electro-magnet for controlling the same and arranged to selectively energize and deenergize said electro-magnet, causing it to move in said one direction or the opposite direction, said timer motor switch and timer motor being connected across a source of power independently of said control means, thereby causing operation of the timer motor at any time when the timer motor switch is closed, independently of said control means, means operated by the timer motor for closing the load switch after a predetermined closure cycle of the timer motor switch, means for opening the timer motor switch to stop the timer motor after closure of the load switch, means operated by movement of the electro-magnet in said opposite direction for opening the load switch instantly and reclosing the timer motor switch, and means operated by the timer motor for reopening the timer motor switch after a period of time of closure thereof.
Claim 11
Dependent Claim
40 words
The combination recited in claim 6 in which energization of the electro-magnet by the control means causes the electro-magnet to move in said one direction causing the timer motor to run on its closure cycle to close the load switch.
Claim 12
Dependent Claim
28 words
The combination recited in claim 6 in which the means for instantly opening the load switch is powered independently of the electro-magnet and releases the timer motor switch.
Claim 13
Dependent Claim
265 words
In a control system for a power operated device, a main switch controlling the power operated device, said main switch having an operator movable between two positions, one position causing closure of the switch and the other position causing opening of said switch, timing means for actuating said switch operator, said timing means including a timer motor, a cam driven by said motor, said cam having a rise portion and a drop-off portion, a cam follower riding the cam, spring means wound by the cam follower when raised by the cam, closing means actuated by the spring means when the cam follower drops down the drop-off portion of the cam for closing said switch, opening means capable of opening said switch instantly after closure thereof and without requiring operation of the timer motor, switching means for controlling the timer motor, master control means, an electro-magnet controlled by said master control means, means operated by the electro-magnet in response to one condition at the master control means for closing said switching means to start the timer motor, causing the cam follower to drop down the drop-off portion of the cam and allow the closing means to be actuated by the spring means for closing the main switch, means for opening the timer motor switching means to stop the timer motor after closure of said main switch, means actuated by said electro-magnet in response to another condition of the master control means for causing the opening means to open the main switch, and means for reclosing the timer motor switching means when the main switch is opened.
Claim 14
Dependent Claim
265 words
In a control system for a power operated device, a main switch controlling the power operated device, said main switch having an operator movable between two positions, one position causing closure of the switch and the other position causing opening of said switch, timing means for actuating said switch operator, said timing means including a timer motor, a cam driven by said motor, said cam having a rise portion and a drop-off portion, a cam follower riding the cam, spring means wound by the cam follower when raised by the cam, closing means actuated by the spring means when the cam follower drops down the drop-off portion of the cam for closing said switch, opening means capable of opening said switch instantly after closure thereof and without requiring operation of the timer motor, switching means for controlling the timer motor, master control means, an electro-magnet controlled by said master control means, means operated by the electro-magnet in response to one condition at the master control means for closing said switching means to start the timer motor, causing the cam follower to drop down the drop-off portion of the cam and allow the closing means to be actuated by the spring means for closing the main switch, means for opening the timer motor switching means to stop the timer motor after closure of said main switch, means actuated by said electro-magnet in response to another condition of the master control means for causing the opening means to open the main switch, and means for reclosing the timer motor switching means when the main switch is opened.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |