Patent US3683198A successfully refreshed from Google Patents.
US3683198A
Expired / Lapsed
US
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Load monitored standby power system
Assignee: REGULATORS Inc
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Filing: 1971-02-03
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Granted: 1972-08-08
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Expires: 1991-02-03
Abstract
Abstract A system for turning a standby power supply on and off in which the standby power is only activated upon a demand from the load being supplied. The system is particularly useful, for example, in alternating current systems where the standby power includes an inverter for converting a direct current battery source to an alternating voltage. Inverters of this type have a relatively large internal loss which would cause a large battery drain whether or not the standby power is supplying a load. The improved system of the invention includes a load monitoring means which turns the inverter on only when a load is presented to the standby power thereby substantially eliminating the no-load inverter losses.
Inventors
- 👤 Herbert William Thode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:54
CPC Classifications
H; H02; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/062; Y; Y02; Y02B; Y02B70/00; Y02B70/30; Y04; Y04S; Y04S20/00; Y04S20/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
104 words
In an electrical power supply system connecting a load to a main power source, a power standby control system for selective connection of said load to a standby power source comprising inverter means for selective connection to said standby power source load sensing means for detecting a power demand by said load upon failure of said main power source, and monitor means for electrically connecting said inverter means to said load upon failure of said main power source and in response to said load sensing means for connecting said standby power source to said inverter means only upon occurrence of said load power demand.
Claim 2
Dependent Claim
104 words
In an electrical power supply system connecting a load to a main power source, a power standby control system for selective connection of said load to a standby power source comprising inverter means for selective connection to said standby power source load sensing means for detecting a power demand by said load upon failure of said main power source, and monitor means for electrically connecting said inverter means to said load upon failure of said main power source and in response to said load sensing means for connecting said standby power source to said inverter means only upon occurrence of said load power demand.
Claim 3
Dependent Claim
28 words
A power standby control system according to claim 1 wherein said main power source is A.C. electrical power and said standby power source is a D.C. electrical battery.
Claim 4
Dependent Claim
101 words
A power standby control system according to claim 2 wherein said monitor means comprises a pair of main power lines for running from said main power source to said load, a main power solenoid for connection across said main power source, first and second pairs of normally open contacts associated with said main power solenoid in said main power lines respectively; and a pair of inverter lines running from the output of said inverter means to said load, said inverter lines including third and fourth pairs of normally closed contacts associated with said main power solenoid in said inverter lines respectively.
Claim 5
Dependent Claim
81 words
A power standby control system according to claim 3 wherein said monitor means further comprises an inverter solenoid connected across the output of said inverter means and first and second pairs of normally open contacts in said inverter lines respectively associated with said inverter solenoid; a first pair of battery lines running from the output of said battery to the input of said inverter; and a second pair of battery lines running from said battery output to said load sensing means.
Claim 6
Dependent Claim
59 words
A power standby control system according to claim 4 wherein said load sensing means comprises a silicon controlled rectifier in series with a load-demand solenoid, a fifth pair of normally closed contacts associated with said main power solenoid and a pair of normally open contacts in one of said first battery output lines pair associated with said load-demand solenoid.
Claim 7
Dependent Claim
94 words
A power standby control system according to claim 5 wherein said load sensing means further comprises a pair of resistors in series connected at one end thereof to one of said inverter lines between said fourth pair of main power solenoid contacts and said second pair of inverter solenoid contacts and at the other end thereof to the junction of said silicon controlled rectifier and one of said second pair of battery output lines; the gate electrode of said silicon controlled rectifier being connected to the junction of said pair of resistors in series.
Claim 8
Dependent Claim
62 words
A power standby control system according to claim 6 wherein said monitor means further includes a third pair of normally closed contacts associated with said inverter solenoid connected between the other of said first battery output lines pair and the other of said inverter lines between said first pair of inverter solenoid contacts and sAid third pair of main power solenoid contacts.
Claim 9
Dependent Claim
71 words
A power standby control system according to claim 2 wherein said inverter means comprises a pilot inverter for connection to said battery in response to said load sensing means detecting a power demand by said load which does not exceed a predetermined level and a main inverter for connection to said battery in response to said load sensing means detecting a power demand by said load which exceeds said predetermined level.
Claim 10
Dependent Claim
104 words
A power standby control system according to claim 8 wherein said monitor means comprises a pair of main power lines for running from said main power source to said load, a main power solenoid for connection across said main power source, first and second pairs of normally open contacts associated with said main power solenoid in said main power lines respectively; and a pair of main inverter lines running from the output of said main inverter to said load, said main inverter lines including third and fourth pairs of normally closed contacts associated with said main power solenoid in said main inverter lines respectively.
Claim 11
Dependent Claim
69 words
A power standby control system according to claim 9 wherein said monitor means further comprises a main inverter solenoid connected across the output of said main inverter and first and second pairs of normally open contacts in said main inverter lines respectively associated with said main inverter solenoid; and a first pair of battery lines running from the output of said battery to the input of said main inverter.
Claim 12
Dependent Claim
90 words
A power standby control system according to claim 10 wherein said monitor means further comprises a second pair of battery lines running from said battery to the input of said pilot inverter; and a pair of pilot inverter lines running from the output of said pilot inverter to said main inverter lines respectively connected thereto between said third pair of main power solenoid contacts and said first pair of main inverter contacts, and between said fourth pair of main power solenoid contacts and said second pair of main inverter contacts.
Claim 13
Dependent Claim
19 words
A power standby control system according to claim 11 wherein said load sensing means is connected across said battery.
References Cited (Backward Citations)
US3389268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |