US3633392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic combination lock
Assignee: Trane US Inc
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Filing: 1970-01-30
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Granted: 1972-01-11
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Expires: 1990-01-30
Abstract
Abstract This invention relates to a fluidic device for determining the occurrence of a predetermined sequence of digits of a rotatable dial and the direction of rotation of the dial to control selectively the operation of a lock on a door.
Inventors
- 👤 Edward Hall Bell
- 👤 Barry Sayers Fichter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:22
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/001; E; E05; E05B; E05B51/00; E05B51/02; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2087; Y10T137/2093; Y10T70/00; Y10T70/70; Y10T70/7051
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
38 words
In a combination lock, a fluidic logic device for determining the occurrence of a predetermined sequence of digits comprising first means to detect the digit selected, and second means coupled to detect the order of selection of digits.
Claim 2
Dependent Claim
38 words
In a combination lock, a fluidic logic device for determining the occurrence of a predetermined sequence of digits comprising first means to detect the digit selected, and second means coupled to detect the order of selection of digits.
Claim 3
Dependent Claim
20 words
The structure of claim 1 including means coupled to detect the selection of a digit other than the digit required.
Claim 4
Dependent Claim
24 words
The structure of claim 2 including means to disable said second means to prevent said first and second means from performing the logic desired.
Claim 5
Dependent Claim
25 words
The structure of claim 3 comprising timer means coupled to permit said first and second means from initiating the generation of a desired output signal.
Claim 6
Dependent Claim
14 words
The structure of claim 4 wherein serial first means comprises a fluidic AND gate.
Claim 7
Dependent Claim
20 words
The structure of claim 5 wherein said second means comprises a fluidic flip-flop coupled to feed said fluidic AND gate.
Claim 8
Dependent Claim
27 words
The structure of claim 6 wherein said means to disable said fluidic flip-flop comprises a lock switch to reset and hold said flip-flop in the reset position.
Claim 9
Dependent Claim
95 words
In a combination lock, a fluidic logic device for determining the occurrence of a predetermined sequence of digits comprising a first fluidic flip-flop coupled to respond to the occurrence of a first digit, a fluidic AND gate coupled to said first fluidic flip-flop to indicate the occurrence of a second digit, a fluidic inhibited OR gate, a second AND gate coupled to receive a signal from said first AND gate and said inhibited OR gate, and a second fluidic flip-flop fed by said second AND gate to feed a fluid to a lock release means.
Claim 10
Dependent Claim
95 words
In a combination lock, a fluidic logic device for determining the occurrence of a predetermined sequence of digits comprising a first fluidic flip-flop coupled to respond to the occurrence of a first digit, a fluidic AND gate coupled to said first fluidic flip-flop to indicate the occurrence of a second digit, a fluidic inhibited OR gate, a second AND gate coupled to receive a signal from said first AND gate and said inhibited OR gate, and a second fluidic flip-flop fed by said second AND gate to feed a fluid to a lock release means.
Claim 11
Dependent Claim
20 words
The combination of claim 8 including fluid time delay means coupled to the inhibit channel of said inhibited OR gate.
Claim 12
Dependent Claim
24 words
The combination of claim 9 including timer means coupled to condition said fluidic flip-flop fed by said second AND gate to generate an output.
Claim 13
Dependent Claim
23 words
The combination of claim 10 wherein said first fluidic flip-flop is coupled to be repositioned to indicate the selection of an undesired digit.
Claim 14
Dependent Claim
23 words
The combination of claim 11 including a lock switch to reset and hold said first and second fluidic flip-flops in their reset position.
Claim 15
Dependent Claim
37 words
In a combination lock, a fluidic logic device for determining the occurrence of a predetermined sequence of digits comprising first means to detect the digit selected, and second means coupled to detect the sequence of digits selected.
Claim 16
Dependent Claim
37 words
In a combination lock, a fluidic logic device for determining the occurrence of a predetermined sequence of digits comprising first means to detect the digit selected, and second means coupled to detect the sequence of digits selected.
Claim 17
Dependent Claim
51 words
In a combination lock, a fluidic logic device for determining the occurrence of a predetermined sequence of digits comprising a first fluidic flip-flop coupled to respond to the occurrence of a first digit, a fluidic AND gate coupled to said first fluidic flip-flop to indicate the occurrence of a second digit.
Claim 18
Dependent Claim
51 words
In a combination lock, a fluidic logic device for determining the occurrence of a predetermined sequence of digits comprising a first fluidic flip-flop coupled to respond to the occurrence of a first digit, a fluidic AND gate coupled to said first fluidic flip-flop to indicate the occurrence of a second digit.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |