US3760404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chess game progress demonstration device
Assignee: Individual
•
Filing: 1972-07-07
•
Granted: 1973-09-18
•
Expires: 1992-07-07
Abstract
Abstract A chess game progress demonstration device which comprises a chessboard with pieces; a demonstration panel with 64 actuating units; a pulse shaper; a pulse counter; a check trigger with separated inputs and a control unit, every chessman being provided with an oscillating circuit tuned to the frequency allocated to a particular category of chessmen, while placed under every square of the chessboard is an inductance coil coupled with the output of the pulse generator feeding excitation pulses in succession to all inductance coils. The pulse shaper has its input connected to the outputs of all inductance coils and its output connected, according to signals from the control unit, first to the complementing input of the pulse counter for a calibrated time interval starting at the moment an excitation pulse arrives to the subsequent inductance coil and then, to one of the inputs of the check trigger.
Inventors
- 👤 G Sergeevich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:15
CPC Classifications
A; A63; A63F; A63F3/00; A63F3/02; A63F3/022; A63F3/00643; A63F2003/00662; A63F2003/00675
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
149 words
A chess game progress demonstration device comprising a chessboard; chessmen; a demonstration panel; 64 actuating units of said demonstration panel; oscillating circuits placed inside said chessmen and tuned to frequencies allocated individually to similar chessmen; inductance coils, each said coil being placed under a respective square of said chessboard; a pulse generator the output of which is connected to the inputs of all inductance coils to feed them in succession with excitation pulses; a pulse counter; a check trigger with separated inputs; a control unit; a pulse shaper whose input is connected to the outputs of all inductance coils and whose output is connected, according to signals of said control unit, first to the complementing input of said pulse counter for a calibrated time interval starting at the moment an excitation pulse arrives to the subsequent inductance coil, and then, to one of the inputs of said check trigger.
Claim 2
Dependent Claim
149 words
A chess game progress demonstration device comprising a chessboard; chessmen; a demonstration panel; 64 actuating units of said demonstration panel; oscillating circuits placed inside said chessmen and tuned to frequencies allocated individually to similar chessmen; inductance coils, each said coil being placed under a respective square of said chessboard; a pulse generator the output of which is connected to the inputs of all inductance coils to feed them in succession with excitation pulses; a pulse counter; a check trigger with separated inputs; a control unit; a pulse shaper whose input is connected to the outputs of all inductance coils and whose output is connected, according to signals of said control unit, first to the complementing input of said pulse counter for a calibrated time interval starting at the moment an excitation pulse arrives to the subsequent inductance coil, and then, to one of the inputs of said check trigger.
Claim 3
Dependent Claim
180 words
A chess game progress demonstration device as claimed in claim 1 in which said control unit comprises a crystal oscillator having its output connected to a ring pulse distributor, the first output of which is coupled with the reset input of said pulse counter and with the second input of said check trigger; the second output is coupled with the input of said pulse generator as well as with the complementing input of said pulse counter via a delay element and a coincidence circuit whose other input is connected to the output of said pulse shaper; the third output is coupled, with the first input of said check trigger via another coincidence circuit whose second input is connected to the output of said pulse shaper, and the fourth output is coupled with the control inputs of said actuating units of the demonstration panel as well as as with, the second input of this check trigger and the reset input of said pulse counter via the third coincidence circuit whose second input is connected to the output of said check trigger.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |