US3710214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural motor timing sequence system
Assignee: Individual
•
Filing: 1971-05-04
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Granted: 1973-01-09
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Expires: 1991-05-04
Abstract
Abstract A system for starting a plurality of motors sequentially, which operates in such a manner that each motor will not start until the previously started motor has come to full speed and acquires normal current flow. The timing sequence system hereof is connected in the control circuit of the motors associated with the system and is thereby not subject to the high voltage and current requirements which characterize the motor power circuit.
Inventors
- 👤 W Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:56
CPC Classifications
H; H02; H02P; H02P1/00; H02P1/16; H02P1/54; H02P1/58
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
197 words
A timing sequence system for sequentially starting a plurality of electrical devices, comprising: a. a control circuit means associated with each of said devices for controlling the operation of said device, said control circuit means including a power supply means having an output voltage which is low relative to the power supply of said electrical devices, whereby said control circuit means is a low voltage circuit; and b. timer means connected to said control circuit means for sequentially closing each of a plurality of sets of contacts in said control circuit means, each of said sets of contacts being associated with one of said devices, said timer means being arranged to effect said sequential closing by the actuation of said control circuit means and the coincident closing of one of said sets of contacts associated with the electrical device to be started, said timer means being effective to provide a time period between the closing of the successive sets of contacts equal at least to the time required for completion of current surges caused by the starting of said electrical devices, and for the said started one of said electrical devices to attain its normal running speed.
Claim 2
Dependent Claim
197 words
A timing sequence system for sequentially starting a plurality of electrical devices, comprising: a. a control circuit means associated with each of said devices for controlling the operation of said device, said control circuit means including a power supply means having an output voltage which is low relative to the power supply of said electrical devices, whereby said control circuit means is a low voltage circuit; and b. timer means connected to said control circuit means for sequentially closing each of a plurality of sets of contacts in said control circuit means, each of said sets of contacts being associated with one of said devices, said timer means being arranged to effect said sequential closing by the actuation of said control circuit means and the coincident closing of one of said sets of contacts associated with the electrical device to be started, said timer means being effective to provide a time period between the closing of the successive sets of contacts equal at least to the time required for completion of current surges caused by the starting of said electrical devices, and for the said started one of said electrical devices to attain its normal running speed.
Claim 3
Dependent Claim
30 words
The system of claim 1 further including holding means for maintaining the operation of said electrical devices after the opening of the associated set of contacts of said timer means.
Claim 4
Dependent Claim
57 words
The system of claim 1 wherein each of said control circuit means includes a control switch and a relay in series with the corresponding set of contacts, whereby upon coincident closing of each of said control switches and its associated set of contacts, the respective circuit is completed through said relay and the associated relay is energized.
Claim 5
Dependent Claim
12 words
The system of claim 3, wherein said control switch comprises a thermostat.
Claim 6
Dependent Claim
14 words
The system of claim 3, wherein said control switch comprises a manually operated switch.
Claim 7
Dependent Claim
14 words
The system of claim 3, wherein said control switch comprises a timer operated switch.
Claim 8
Dependent Claim
25 words
The system of claim 2, wherein said holding means comprises a dropping resistor in parallel with each set of said plurality of sets of contacts.
Claim 9
Dependent Claim
34 words
The system of claim 7, wherein saId resistor does not permit passage of current therethrough sufficient to energize said motor relay, but sufficient to maintain energization thereof once said motor relay has been energized.
Claim 10
Dependent Claim
103 words
The system of claim 2, wherein said holding means comprises: a. a control relay in series with each set of said plurality of sets of contacts; b. a normally open switch, said switch being closed by the energization of said control relay; c. a dropping resistor in parallel with said switch; and d. a motor control relay in series with the parallel combination of said dropping resistor and said switch, whereby said motor relay is energized by the closing of said switch and said dropping resistor permits sufficient current to flow through said motor relay for maintaining its energization once it is energized.
Claim 11
Dependent Claim
47 words
The system of claim 1 wherein said timer means comprises: a. a plurality of sets of contacts mounted on a plate; and b. a rotatable electrically conductive arm, said arm being mounted for sequentially completing a circuit across each set of said plurality of sets of contacts.
Claim 12
Dependent Claim
112 words
The system of claim 2 wherein said holding means comprises: a. a control relay in series with each set of said plurality of sets of contacts; b. a dropping resistor in series with each of said control relays and each set of said plurality of sets of contacts; and c. a normally open switch connected across the series circuit of each dropping resistor and each set of said plurality of sets of contacts, said normally open switch being closed by the energization of said control relay, whereby a holding circuit for said control relay is completed through said control circuit, said normally open switch in its closed position and said control relay.
References Cited (Backward Citations)
US2782350A
Cited
US3191114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |