Patent US3903508A successfully refreshed from Google Patents.
US3903508A
Expired / Lapsed
US
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Centralized controlling apparatus having control frequencies
Assignee: Mitsubishi Electric Corp
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Filing: 1973-11-08
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Granted: 1975-09-02
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Expires: 1993-11-08
Abstract
Abstract A centralized controlling apparatus is provided and includes a pair of frequency relays which are selectively responsive to two types of frequency signals, the same being different from a fundamental frequency and higher harmonics thereof. One of the two types of frequency signals is used as an opening signal and the other is used as a closing signal. The two types of frequency signals are respectively applied along with a fundamental frequency to a distribution or transmission line for a predetermined period of time such that two driving elements of a differential type relay are selectively operated in accordance with the switching of the frequency relays such that a main circuit to a load is either opened or closed.
Inventors
- 👤 Katsumi Taketa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:43
CPC Classifications
H; H02; H02J; H02J13/00; H02J13/13; H02J13/1311; H02J13/1313; H02J13/18; H02J13/333; Y; Y02; Y02E; Y02E60/00; Y04; Y04S; Y04S40/00; Y04S40/12; Y04S40/121
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
339 words
A centralized controlling apparatus, comprising: a transmitter for supplying first and second signals of two different frequencies; a resonance circuit including a coil and a condenser which are electrically resonated by receiving said first and second signals transmitted from said transmitter; a stator core which supports said coil and forms a magnetic flux circuit and has an opening formed in a portion thereof; a first resonator placed in said opening and which is mechanically vibrated by the magnetic flux in said opening when said resonance circuit is resonated in response to said first signal; a second resonator placed in said opening which is mechanically vibrated by the magnetic flux in said opening when said resonance circuit is resonated in response to said second signal; a first movable contact which is activated by said first resonator in its vibrating condition to turn on a first switch; a first weight fixed on said first movable contact for maintaining said first switch in its on condition during the time of activation of said first movable contact; a second movable contact which is activated by said second resonator in its vibrating condition to turn on a second switch; a second weight fixed on said second movable contact for maintaining said second switch in its on condition during the time of activation of said second movable contact; a first bimetal which is curved for a predetermined degree after a delay of a predetermined time at the turning on of said first switch; a second bimetal which is curved for a predetermined degree after a delay of a predetermined time at the turniNg on of said second switch; and a main switch inserted in a load circuit which is driven by said first bimetal to turn on said load circuit and to maintain such a condition when said first bimetal is curved in a predetermined degree and which is driven by said second bimetal to turn off said load circuit and to maintain such a condition when said second bimetal is curved a predetermined degree.
Claim 2
Dependent Claim
339 words
A centralized controlling apparatus, comprising: a transmitter for supplying first and second signals of two different frequencies; a resonance circuit including a coil and a condenser which are electrically resonated by receiving said first and second signals transmitted from said transmitter; a stator core which supports said coil and forms a magnetic flux circuit and has an opening formed in a portion thereof; a first resonator placed in said opening and which is mechanically vibrated by the magnetic flux in said opening when said resonance circuit is resonated in response to said first signal; a second resonator placed in said opening which is mechanically vibrated by the magnetic flux in said opening when said resonance circuit is resonated in response to said second signal; a first movable contact which is activated by said first resonator in its vibrating condition to turn on a first switch; a first weight fixed on said first movable contact for maintaining said first switch in its on condition during the time of activation of said first movable contact; a second movable contact which is activated by said second resonator in its vibrating condition to turn on a second switch; a second weight fixed on said second movable contact for maintaining said second switch in its on condition during the time of activation of said second movable contact; a first bimetal which is curved for a predetermined degree after a delay of a predetermined time at the turning on of said first switch; a second bimetal which is curved for a predetermined degree after a delay of a predetermined time at the turniNg on of said second switch; and a main switch inserted in a load circuit which is driven by said first bimetal to turn on said load circuit and to maintain such a condition when said first bimetal is curved in a predetermined degree and which is driven by said second bimetal to turn off said load circuit and to maintain such a condition when said second bimetal is curved a predetermined degree.
Claim 3
Dependent Claim
41 words
The centralized controlling apparatus according to claim 1, wherein said delay time is selected so as to be shorter than the duration of said signals and to be longer than the duration of a coded signal having a relatively short duration.
Claim 4
Dependent Claim
219 words
A centralized controlling apparatus comprising: a transmitter for supplying signals of two different frequencies through a distribution line; means for supplying ac power to a load through said distribution line; a pair of frequency sensitive relays including mechanical resonators which separately operate in response to receiving a corresponding one of said two different frequency signals supplied from said transmitter; two different control elements of the thermal induction type which are indirectly responsive to current flowing through said frequency sensitive relays; and, switching means for controlling the connection of said ac power to said load that switch from one position to another after predetermined delay period in accordance with the selective actuation of one of said two differential control elements, said one differential control element being responsive to the operation of one of said two frequency sensitive relays for temporarily maintaining a particular position of said switching means, said delay period of said switching means being shorter than the duration period of either of said signals from said transmitter, but being longer than a predetermined period and wherein said switching means is closed for energizing said load when one of said thermal induction elements is bent beyond a given point and opened for de-energizing said load when the other of said thermal induction elements is bent beyond a given point.
Claim 5
Dependent Claim
219 words
A centralized controlling apparatus comprising: a transmitter for supplying signals of two different frequencies through a distribution line; means for supplying ac power to a load through said distribution line; a pair of frequency sensitive relays including mechanical resonators which separately operate in response to receiving a corresponding one of said two different frequency signals supplied from said transmitter; two different control elements of the thermal induction type which are indirectly responsive to current flowing through said frequency sensitive relays; and, switching means for controlling the connection of said ac power to said load that switch from one position to another after predetermined delay period in accordance with the selective actuation of one of said two differential control elements, said one differential control element being responsive to the operation of one of said two frequency sensitive relays for temporarily maintaining a particular position of said switching means, said delay period of said switching means being shorter than the duration period of either of said signals from said transmitter, but being longer than a predetermined period and wherein said switching means is closed for energizing said load when one of said thermal induction elements is bent beyond a given point and opened for de-energizing said load when the other of said thermal induction elements is bent beyond a given point.
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |