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US3875487A Expired / Lapsed US ⏱️ 0.0 years remaining

Method and apparatus for motor-starting control

Assignee: Mobil Oil AS
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Filing: 1973-05-01
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Granted: 1975-04-01
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Expires: 1993-05-01
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Abstract

Abstract A motor is electrically coupled to a power source through a motor starter. The motor starter is selectively operated by a relay to connect and disconnect the power source to the motor. A counter provides an indication of the number of times the motor fails to run after being connected to the power source. The relay is operated to cause the motor starter to disconnect the power source from the motor in response to the number of times the motor fails to start and run continuously for a given time after the power source has been connected to the motor.

Inventors

  • 👤 Laniel B White

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 17:47
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/08; H02H7/0816

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 114 words
A method of controlling the operation of a motor, comprising the steps of: a. producing a pulse each tIme the motor shuts down, b. counting said pulses having sequentially occurred without the motor having continuously run for a given time period between pulses, c. shutting down the motor a first time when the number of said pulses counted equals a first number, d. automatically restarting the motor at the end of a given time delay, said time delay having begun when the motor was shut down, e. continuing the sequential counting of said pulses, and f. shutting down the motor a second time when the number of said pulses counted equals a second number.
Claim 2
Independent Claim 114 words
A method of controlling the operation of a motor, comprising the steps of: a. producing a pulse each tIme the motor shuts down, b. counting said pulses having sequentially occurred without the motor having continuously run for a given time period between pulses, c. shutting down the motor a first time when the number of said pulses counted equals a first number, d. automatically restarting the motor at the end of a given time delay, said time delay having begun when the motor was shut down, e. continuing the sequential counting of said pulses, and f. shutting down the motor a second time when the number of said pulses counted equals a second number.
Claim 3
Independent Claim 179 words
A system for controlling the operation of a motor from a power source, comprising: a. first means selectively operable for connecting and disconnecting the power source to the motor, b. second means responsive to the operation of the motor for providing a pulse each time the motor fails, c. a counter to which said pulses are applied for providing a count output of the number of times the motor has failed, d. third means for resetting said counter each time the motor runs continuously for the duration of a given time period, e. fourth means responsive to the count output of said counter for causing said first means to disconnect the power source from the motor for a given time delay after a first predetermined number of counts, said first means again connecting the power source to the motor at the end of the time delay, and f. fifth means responsive to the count output of said counter for causing said first means to again disconnect the power source to the motor after a second predetermined number of counts.
Claim 4
Independent Claim 179 words
A system for controlling the operation of a motor from a power source, comprising: a. first means selectively operable for connecting and disconnecting the power source to the motor, b. second means responsive to the operation of the motor for providing a pulse each time the motor fails, c. a counter to which said pulses are applied for providing a count output of the number of times the motor has failed, d. third means for resetting said counter each time the motor runs continuously for the duration of a given time period, e. fourth means responsive to the count output of said counter for causing said first means to disconnect the power source from the motor for a given time delay after a first predetermined number of counts, said first means again connecting the power source to the motor at the end of the time delay, and f. fifth means responsive to the count output of said counter for causing said first means to again disconnect the power source to the motor after a second predetermined number of counts.
Claim 5
Independent Claim 202 words
A system for controlling the starting of a motor, comprising: a. a motor, b. a power source, c. first means for connecting and disconnecting the power source to the motor, d. second means responsive to the condition of said motor for producing a stop pulse each time the motor shuts down, e. a counter to which said stop pulses are applied, said counter providing at least two count pulses, a first count pulse when the total count of said counter equals a first number and a second count pulse when the total count of said counter equals a second number, f. third means responsive to the condition of said motor for resetting said counter each time the motor runs continuously for a predetermined time period, g. fourth means enabled by said first count pulse for causing said first means to disconnect the power source to the motor, h. fifth means for disabling said fourth means a predetermined time delay after said first count pulse, thereby causing said first means to again connect the power source to the motor, and i. sixth means responsive to said second count pulse for causing said first means to again disconnect the power source to the motor.
Claim 6
Independent Claim 202 words
A system for controlling the starting of a motor, comprising: a. a motor, b. a power source, c. first means for connecting and disconnecting the power source to the motor, d. second means responsive to the condition of said motor for producing a stop pulse each time the motor shuts down, e. a counter to which said stop pulses are applied, said counter providing at least two count pulses, a first count pulse when the total count of said counter equals a first number and a second count pulse when the total count of said counter equals a second number, f. third means responsive to the condition of said motor for resetting said counter each time the motor runs continuously for a predetermined time period, g. fourth means enabled by said first count pulse for causing said first means to disconnect the power source to the motor, h. fifth means for disabling said fourth means a predetermined time delay after said first count pulse, thereby causing said first means to again connect the power source to the motor, and i. sixth means responsive to said second count pulse for causing said first means to again disconnect the power source to the motor.

References Cited (Backward Citations)

US3250465A Cited
US3389390A Cited
US3387182A Cited
US3483431A Cited
US3586911A Cited
US3742303A Cited
US3716756A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-03-31 1978-09-30 1979-04-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-03-31 1982-09-30 1983-04-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-03-31 1986-09-30 1987-04-01 $7700.00 Window Closed / Lapsed

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