US3734123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control means regulating a supply of liquids
Assignee: Duracell Inc USA
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Filing: 1971-07-14
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Granted: 1973-05-22
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Expires: 1991-07-14
Abstract
Abstract Liquid flow regulating means is responsive to a switching means, the switching means in turn being responsive to the amount of current flowing through a constant voltage source, the amount of current from the constant voltage source being controlled by a semiconductive current control means which is sensitive to the temperature differences produced by immersion in the liquid.
Inventors
- 👤 D Pomerantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:55
CPC Classifications
D; D06; D06F; D06F39/00; D06F39/08; D06F39/087; G; G05; G05D; G05D9/00; G05D9/12; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7306
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
A control means regulating a supply of liquid to a storage means comprising: a. a temperature sensitive semiconductive current control means disposed in said liquid storage means, said semiconductive current control means having a junction responsive to temperature changes in accordance with the presence or absence of a liquid, b. a constant voltage source, said constant voltage source connected directly across said semiconductive current control means so as to provide a constant voltage at said junction so as to regulate the amount of current flowing through said voltage source and said semiconductive current control means, c. switching means responsive to current from said constant voltage source, and d. liquid flow regulating means responsive to said switching.
Claim 2
Dependent Claim
116 words
A control means regulating a supply of liquid to a storage means comprising: a. a temperature sensitive semiconductive current control means disposed in said liquid storage means, said semiconductive current control means having a junction responsive to temperature changes in accordance with the presence or absence of a liquid, b. a constant voltage source, said constant voltage source connected directly across said semiconductive current control means so as to provide a constant voltage at said junction so as to regulate the amount of current flowing through said voltage source and said semiconductive current control means, c. switching means responsive to current from said constant voltage source, and d. liquid flow regulating means responsive to said switching.
Claim 3
Dependent Claim
15 words
A control means according to claim 1 wherein said current regulating means includes a diode.
Claim 4
Dependent Claim
21 words
A control means according to claim 2 wherein said diode is heated by forward current above the temperature of said liquid.
Claim 5
Dependent Claim
14 words
A control means according to claim 3 wherein said diode is fabricated from silicon.
Claim 6
Dependent Claim
26 words
A control means according to claim 2 wherein said voltage source includes a transformer and said diode is connected across a secondary coil of said transformer.
Claim 7
Dependent Claim
18 words
A control means according to claim 1 wherein said liquid flow regulating means includes a solenoid valve means.
Claim 8
Dependent Claim
23 words
A control means according to claim 6 wherein said solenoid valve means includes a DC solenoid valve means connected to said switching means.
Claim 9
Dependent Claim
46 words
A control means according to claim 6 wherein said solenoid valve means includes an AC solenoid valve means and wherein said solenoid valve means is responsive to said switching means through AC current supply means connected between said switching means and said half wave solenoid means.
Claim 10
Dependent Claim
34 words
A control means according to claim 8 wherein said AC current supply means includes a triac and means connected between said triac and said switching means regulating the flow of current to said triac.
Claim 11
Dependent Claim
21 words
A control means according to claim 1 wherein said switching means includes an SCR and means biasing current to said SCR.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |