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US4124211A Expired / Lapsed US ⏱️ 0.0 years remaining

Circuit for use in electronic game of nim

Assignee: Individual
•
Filing: 1977-08-26
•
Granted: 1978-11-07
•
Expires: 1997-08-26
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Abstract

Abstract An AND gate has a first input biased ON and a second input normally biased OFF. A switch selectively biases the second input ON. The output of the AND gate is fed back to the second input to bias the second input ON when the output is ON. A transistor connected in a common collector configuration has its base electrode connected to the output of the gate. A light-emitting diode is connected in the emitter circuit of the transistor.

Inventors

  • 👤 Roy R. Worrall

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 01:54
CPC Classifications
A; A63; A63F; A63F3/00; A63F3/00643; A63F3/00697; A63F2003/007; A63F2003/00709

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 188 words
A circuit for use in an electronic game of nim, said circuit comprising a source of electrical energy; an AND gate having a first input, a second input and an output; first biasing means connected to the first input and including the source of electrical energy for biasing said first input at an ON level; a player operable switch connected to the second input for biasing the second input to an ON level when the switch is closed, thereby switching the AND gate to its conductive condition; a feedback network connected between the output and the second input for biasing the second input at an ON level when the output is biased at an ON level; a light source; and second biasing means connected to the second input, for normally biasing said second input at an OFF level whereby said AND gate is normally in its low output condition, said second biasing means including the source of electrical energy, and switching means connected between the light source and the AND gate, said switching means energizing said light source when said AND gate is in its high output condition.
Claim 2
Dependent Claim 188 words
A circuit for use in an electronic game of nim, said circuit comprising a source of electrical energy; an AND gate having a first input, a second input and an output; first biasing means connected to the first input and including the source of electrical energy for biasing said first input at an ON level; a player operable switch connected to the second input for biasing the second input to an ON level when the switch is closed, thereby switching the AND gate to its conductive condition; a feedback network connected between the output and the second input for biasing the second input at an ON level when the output is biased at an ON level; a light source; and second biasing means connected to the second input, for normally biasing said second input at an OFF level whereby said AND gate is normally in its low output condition, said second biasing means including the source of electrical energy, and switching means connected between the light source and the AND gate, said switching means energizing said light source when said AND gate is in its high output condition.
Claim 3
Dependent Claim 14 words
A circuit as claimed in claim 1, wherein the switching means includes a transistor.
Claim 4
Dependent Claim 17 words
A circuit as claimed in claim 1, wherein the feedback network includes a diode and a resistor.
Claim 5
Dependent Claim 16 words
A circuit as claimed in claim 1, wherein the light source is a light emitting diode.
Claim 6
Dependent Claim 14 words
A circuit as claimed in claim 1, wherein the light source is a lamp.

References Cited (Backward Citations)

US2215544A Cited
US3240989A Cited
US3500370A Cited
GB1237010A Cited
US3584257A Cited
US3643247A Cited
US3709499A Cited
US3895807A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-11-06 1982-05-08 1982-11-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-11-06 1986-05-08 1986-11-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-11-06 1990-05-08 1990-11-07 $7700.00 Window Closed / Lapsed

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