US4222226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-range timer
Assignee: Fuji Electric Co Ltd
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Filing: 1979-02-13
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Granted: 1980-09-16
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Expires: 1999-02-13
Abstract
Abstract A multi-range timer comprising an RC oscillator with a variable resistor whose resistance is varied with rotation of a dial. A fixed frequency divider circuit frequency-divides the output of the RC oscillator. A variable frequency divider circuit receives an output of the fixed frequency divider circuit, and a time setting section having a digital switch switches a frequency division ratio of the variable frequency divider circuit. The time limit is changed by switching the digital switch. The time setting section comprises a dial and a plurality of numerical value scales distinguished from one another by color, each of said scales having the same color as the display surface of said digital switch, which indicates a selected time setting range.
Inventors
- 👤 Osamu Miyatake
- 👤 Hirotake Murakami
- 👤 Masakatsu Hishinuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:18
CPC Classifications
G; G04; G04G; G04G21/00; G04G21/08; G04F; G04F1/00; G04F1/005; G04G15/00; G04G15/003
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
101 words
A multi-range timer comprising: a housing; a dial mounted on said housing; an RC oscillator having a variable resistor whose resistance is varied by rotation of said dial to vary the oscillation frequency of said oscillator; a fixed frequency divider circuit means receiving the output of said oscillator and dividing it by a fixed divisor; variable frequency divider means receiving the output of said fixed divider circuit; and time setting means including digital switch means for switching frequency dividsion ratios in the variable frequency divider means, whereby the time counted by said timer is changed by switching said digital switch means.
Claim 2
Dependent Claim
101 words
A multi-range timer comprising: a housing; a dial mounted on said housing; an RC oscillator having a variable resistor whose resistance is varied by rotation of said dial to vary the oscillation frequency of said oscillator; a fixed frequency divider circuit means receiving the output of said oscillator and dividing it by a fixed divisor; variable frequency divider means receiving the output of said fixed divider circuit; and time setting means including digital switch means for switching frequency dividsion ratios in the variable frequency divider means, whereby the time counted by said timer is changed by switching said digital switch means.
Claim 3
Dependent Claim
55 words
The timer of claim 1 wherein said time setting means comprises a plurality of color coded numerical display scales mounted on said housing about said dial, said digital switch means having a display means with a surface color coordinated with said scales, said display means of said digital switch indicating the selected time setting range.
Claim 4
Dependent Claim
15 words
The timer of claim 2 wherein said numerical value scales are detachable from said housing.
Claim 5
Dependent Claim
21 words
The timer of claim 1 further comprising a buffer circuit means for holding the output of said variable frequency divider means.
Claim 6
Dependent Claim
54 words
The timer of claim 1 wherein said variable frequency divider means comprises a frequency divider network receiving the output of said fixed frequency divider circuit means, logic means responsive to the output of said frequency divider network, and a decoder means responsive to said digital switch means providing another input to said logic means.
Claim 7
Dependent Claim
48 words
The timer of claim 5 wherein said frequency divider network comprises a first series of divider means for dividing the output of said fixed frequency divider circuit means and a second series of divider to subject the output of relevant portions of said logic means to frequency division.
Claim 8
Dependent Claim
23 words
The timer of claim 6 wherein said first series of divider means comprises three dividers having divisors of 1/10, 1/30 and 1/60, respectively.
Claim 9
Dependent Claim
23 words
The timer of claim 7 wherein said second series of divider means comprises three dividers having divisors of 1/3, 1/5 and 1/6, respectively.
Claim 10
Dependent Claim
58 words
The timer of claim 6 wherein said logic means comprises a network of OR gates responsive to said decoder means and a first series of AND gates, said OR gates providing one input to said first series of AND gates and said first series of divider means providing a second input to said first series of AND gates.
Claim 11
Dependent Claim
49 words
The timer of claim 9 wherein said logic means further comprises a second series of AND gates, said OR gates providing a first input to said second series of AND gates and said second series of divider means providing a second input to said second series of AND gates.
Claim 12
Dependent Claim
21 words
The timer of claim 10 further comprising an output OR gate receiving the outputs of said second series of AND gates.
Claim 13
Dependent Claim
21 words
The timer of claim 11 further comprising a flip-flop defining a buffer circuit receiving the output of said output OR gate.
Claim 14
Dependent Claim
59 words
The timer of claim 5 or 11, wherein said time setting means further comprises a plurality of color coded numerical display scales mounted on said housing about said dial, said digital switch means having a display means with a surface color coordinated with said scales, said display means of said digital switch means indicating the selected time setting range.
Claim 15
Dependent Claim
15 words
The timer of claim 13 wherein said numerical value scales are detachable from said housing.
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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |