Patent US3858094A successfully refreshed from Google Patents.
US3858094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric system including two loads arranged remotely from each other
Assignee: Individual
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Filing: 1973-12-26
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Granted: 1974-12-31
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Expires: 1993-12-26
Abstract
Abstract Two loads arranged remotely from each other are controlled by circuitry allowing to energize selectively either one or both loads, or either of the loads, from a common a-c power supply.
Inventors
- 👤 L Hanchett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:10
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/725
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
140 words
An electric system including a. a power supply transformer having a primary circuit and having a secondary circuit; b. a first load energized by said secondary circuit of said transformer; c. a first solid-state switch including a control circuit and arranged in series with said first load; d. a second load energized by said secondary circuit of said transformer; e. a second sobid-state switch including a control circuit and arranged in series with said second load; f. a rectifier energized by said secondary circuit of said transformer; g. a third switch connected to apply a signal derived from the output voltage of said rectifier to said control circuit of said first solid-state switch; and h. a fourth switch connected to apply a signal derived from the output voltage of said rectifier to said control circuit of said second solid-state switch.
Claim 2
Dependent Claim
140 words
An electric system including a. a power supply transformer having a primary circuit and having a secondary circuit; b. a first load energized by said secondary circuit of said transformer; c. a first solid-state switch including a control circuit and arranged in series with said first load; d. a second load energized by said secondary circuit of said transformer; e. a second sobid-state switch including a control circuit and arranged in series with said second load; f. a rectifier energized by said secondary circuit of said transformer; g. a third switch connected to apply a signal derived from the output voltage of said rectifier to said control circuit of said first solid-state switch; and h. a fourth switch connected to apply a signal derived from the output voltage of said rectifier to said control circuit of said second solid-state switch.
Claim 3
Dependent Claim
35 words
An electric system as specified in claim 1 wherein said first load is a door-latch-operating solenoid, and wherein said second load is an electro-acoustic signalling device for transmitting requests for energization of said door-latch-operating solenoid.
Claim 4
Dependent Claim
51 words
An electric system as specified in claim 1 wherein said third switch and said fourth switch are part of a logic circuitry including a bistable device precluding simultaneous energization of said control circuit of both said first solid state switch and of said control circuit of said second solid state switch.
Claim 5
Dependent Claim
40 words
An electric system as specified in claim 2 wherein said first solid-state switch and said second solid state switch are both thyristors, and wherein said third switch and said fourth switch are both mechanical switching devices having relatively movable contacts.
Claim 6
Dependent Claim
70 words
An electric system as specified in claim 2 wherein said electro-acoustic signalling device is provided with a shunt to charge said rectifier with a current in excess of the current flowing through said electro-acoustic signalling device, wherein said door-latch-operating solenoid is arranged remotely from said transformer and connected by a two-wire-line to said transformer, and wherein said door-latch-operating solenoid is provided with a shunt including said second solid state switch.
Claim 7
Dependent Claim
100 words
An electric system as specified in claim 1 wherein a. said electro-acoustic signalling device and said door-latch-operating solenoid are arranged remote from each other; b. said first solid state switch is formed by a first thyristor arranged immediately adjacent said door-latch-operating solenoid and said second solid state switch is formed by a second thyristor arranged remotely from said electro-acoustic signalling device; and wherein c. said door-latch-operating solenoid and said first thyristor as well as said electro-acoustic signalling device and said second thyristor are connected in parallel across a pair of lines forming part of said secondary circuit of said transformer.
Claim 8
Dependent Claim
95 words
An electric system as specified in claim 1 wherein a. said electro-acoustic signalling device is shunted by a first diode; b. said first solid state switch is formed by a first thyristor arranged to alLow the passage of half-wave currents in one predetermined direction through said electro-acoustic signalling device; c. said second solid-state switch is formed by a second thyristor arranged to allow the passage of half-wave currents of opposite direction to said predetermined direction through said door-latch-operating solenoid; and wherein d. said rectifier includes a second diode arranged in series with said first diode.
Claim 9
Dependent Claim
146 words
In an electric system including a pair of loads the combination of a. an a-c circuit; b. a first load and a first solid state switch having a control circuit and arranged in series with said first load in said a-c circuit in such a way as to allow but positive current pulses to flow through said first load; c. a second load and a second solid state switch having a control circuit and arranged in series with said second load in such a way as to allow but negative current pulses to flow through said second load; d. a rectifier connected to said a-c circuit; and e. a pair of switches connected to energize selectively said control circuit of said first solid state switch and said control circuit of said second solid state switch by a signal derived from the output voltage of said rectifier.
Claim 10
Dependent Claim
146 words
In an electric system including a pair of loads the combination of a. an a-c circuit; b. a first load and a first solid state switch having a control circuit and arranged in series with said first load in said a-c circuit in such a way as to allow but positive current pulses to flow through said first load; c. a second load and a second solid state switch having a control circuit and arranged in series with said second load in such a way as to allow but negative current pulses to flow through said second load; d. a rectifier connected to said a-c circuit; and e. a pair of switches connected to energize selectively said control circuit of said first solid state switch and said control circuit of said second solid state switch by a signal derived from the output voltage of said rectifier.
Claim 11
Dependent Claim
23 words
An electric system as specified in claim 8 wherein both said first solid state switch and said second solid state switch are thyristors.
Claim 12
Dependent Claim
35 words
An electric system as specified in claim 9 including a pair of series-connected diodes of which one forms a shunt across one of said pair of loads and the other forms part of said rectifier.
Claim 13
Dependent Claim
77 words
A system as specified in claim 9 wherein said a-c circuit includes a transformer winding and a pair of leads connected to said winding, wherein one of said pair of loads and one of said thyristors are included in one of said pair of leads and the other of said pair of loads and the other of said thyristors are connected across said pair of leads, and wherein said other of said pair of leads includes ground.
Claim 14
Dependent Claim
46 words
An electric system as specified in claim 8 wherein said first solid state switch and said second solid state switch are both thyristors, and wherein the trigger circuits of said thyristors are part of a logic circuitry including a flip-flop precluding simultaneous triggering of said thyristors.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |