US3628101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delayed cycling control
Assignee: Penn Controls Inc
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Filing: 1970-06-19
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Granted: 1971-12-14
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Expires: 1990-06-19
Abstract
Abstract An electromagnetic relay is energized by the sequence of first energizing a warp switch sufficiently for the warp switch to close a pair of contacts in an energizing circuit for the relay. Actuation of the relay closes self-holding contacts and cams open a pair of warp switch normally closed contacts in the initiating circuit. Both the relay and the warp switch heater are maintained energized at reduced power through the self-holding relay contacts. Upon any interruption of power the control recycles after a delay of from 3 1/2 to 5 1/2 minutes. This relatively long delay occurs, since the relay, upon releasing,, opens its self-holding contacts necessitating that the warp switch heater cool sufficiently to place its contacts again closed for initiating starting. Starting is then initiated by again reheating the warp switch heater, thereby, providing the sequence of warp switch ''''cooldown'''' and ''''reheat'''' time intervals between cycles. The initiating warp switch normally closed contacts, once opened, cannot reclose unless the camming relay first releases to remove a mechanical block to such opening. This insures a full cooldown and heating warp switch cycle for each operation. The control provides foolproof operation in that a ''''make before break'''' is obtained between the relay self-holding contacts and the warp switch initiating circuit contacts, since the relay self-holding contacts must close before the warp switch contacts can be cammed open. This insures that the operating control is in ''''run'''' condition before the warp switch is placed on reduced power. Upon cooldown of the warp switch, a lost motion connection of its actuator insures that the warp switch initiating contacts reclose only after its self-holding contacts have opened to insure a full reheat cycle of the warp switch for restarting.
Inventors
- 👤 Gerald E Dietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:42
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/30; H01H43/301; H01H43/302; H01H43/304
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
222 words
A starting and cycling control for electrical mechanism providing fast initial start and relatively long time delay between running cycles, comprising; electromechanical means electrically energizable for operation, warp switch means including a heater and a pair of normally closed contacts, means for energizing said heater and electromechanical means, said warp switch heater being connected through its said normally closed contacts to said energizing means for energization at a predetermined power level, said warp switch including a pair of normally open contacts connecting for energizing, when closed, said electromechanical means through said normally closed warp switch contacts, said electromechanical means having a pair of normally open self-holding contacts for actuation closed upon being energized to its operating condition for maintaining energization of said electromechanical means independently of said normally closed warp switch contacts, characterized in that means are provided for maintaining said warp switch heater through its said pair of normally open contacts and through said electromechanical normally open contacts energized at a substantially reduced level under conditions where said electromagnetic means contacts and said warp switch normAlly open contacts are both in closed condition, said electromechanical means, upon operation, camming said normally closed pair of warp switch contacts to open condition, for completing the operating cycle and causing subsequent reoperation only through sufficient reheating of said warp switch heater after cool down.
Claim 2
Dependent Claim
222 words
A starting and cycling control for electrical mechanism providing fast initial start and relatively long time delay between running cycles, comprising; electromechanical means electrically energizable for operation, warp switch means including a heater and a pair of normally closed contacts, means for energizing said heater and electromechanical means, said warp switch heater being connected through its said normally closed contacts to said energizing means for energization at a predetermined power level, said warp switch including a pair of normally open contacts connecting for energizing, when closed, said electromechanical means through said normally closed warp switch contacts, said electromechanical means having a pair of normally open self-holding contacts for actuation closed upon being energized to its operating condition for maintaining energization of said electromechanical means independently of said normally closed warp switch contacts, characterized in that means are provided for maintaining said warp switch heater through its said pair of normally open contacts and through said electromechanical normally open contacts energized at a substantially reduced level under conditions where said electromagnetic means contacts and said warp switch normAlly open contacts are both in closed condition, said electromechanical means, upon operation, camming said normally closed pair of warp switch contacts to open condition, for completing the operating cycle and causing subsequent reoperation only through sufficient reheating of said warp switch heater after cool down.
Claim 3
Dependent Claim
30 words
The control set forth in claim 1 wherein said electromechanical means is an electromagnetic relay for controlling other electrical mechanisms and including said pair of self-holding contacts and a coil.
Claim 4
Dependent Claim
57 words
The arrangement set forth in claim 2 wherein said means for maintaining said warp switch heater energized at substantially reduced level during running, includes a diode for providing half-wave energization of said heater during running, said energizing means being applied to said heater at full-wave energization during initial start up through said normally closed warp switch contacts.
Claim 5
Dependent Claim
129 words
The arrangement of claim 3 wherein said warp switch heater is connected through its said normally closed contacts across said energizing source, and wherein said warp switch normally open contacts are connected in a series circuit with said relay coil, said series circuit shunting said warp switch heater, and wherein said relay self-holding contacts are connected through said diode shunting both said normally closed, and said normally open warp switch contacts, and wherein said relay includes an armature extension in position to actuate said warp switch normally closed contacts open, upon actuation of said relay, for causing completion of the operating cycle of said starting control for applying reduced energization to said warp switch heater through said self-holding relay contacts, said diode and said normally open warp switch contacts.
Claim 6
Dependent Claim
141 words
The arrangement of claim 4 wherein said warp switch includes an actuator movable in a first direction in response to sufficient heating of said warp switch heater for closing said normally open warp switch contacts, said actuator being movable in a direction opposite to said first direction in response to cooldown of said warp switch heater for actuating said normally open warp switch contacts back to normally open condition and actuating said normally closed warp switch contacts back to closed position, characterized in that a lost motion connection means are provided between said warp switch actuator and said normally closed contacts of said warp switch during initial movement of said warp switch actuator in said opposite direction for causing actuation of said normally open warp switch contacts before actuation of said normally closed warp switch contacts by said opposite actuator movement.
Claim 7
Dependent Claim
172 words
A starting and cycling control including a relay for controlling electrically powered mechanism, said relay including a pair of self-holding contacts, a warp switch including a heater and a pair of normally open contacts and a pair of normally closed contacts, means for energizing said warp switch heater at a first predetermined level providing a first time interval for energizing said relay through operation of said warp switch closing said normally open warp switch contacts, when said heater has been energized sufficiently, means providing reduced energization of said warp switch heater during actuated condition of said relay for maintaining said warp switch actuated, means interlocking actuation of said relay with said warp switch normally closed contacts in the initial energizing circuit of said warp switch heater for camming said contacts open only under conditions where said relay has been actuated for providing fast initial starting of electrical mechanism by said relay and cycling of said electrical mechanism after a delay measured by the cooldown plus reheating time of the said warp switch.
Claim 8
Dependent Claim
172 words
A starting and cycling control including a relay for controlling electrically powered mechanism, said relay including a pair of self-holding contacts, a warp switch including a heater and a pair of normally open contacts and a pair of normally closed contacts, means for energizing said warp switch heater at a first predetermined level providing a first time interval for energizing said relay through operation of said warp switch closing said normally open warp switch contacts, when said heater has been energized sufficiently, means providing reduced energization of said warp switch heater during actuated condition of said relay for maintaining said warp switch actuated, means interlocking actuation of said relay with said warp switch normally closed contacts in the initial energizing circuit of said warp switch heater for camming said contacts open only under conditions where said relay has been actuated for providing fast initial starting of electrical mechanism by said relay and cycling of said electrical mechanism after a delay measured by the cooldown plus reheating time of the said warp switch.
References Cited (Backward Citations)
US2539179A
Cited
US3142013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |