Patent US3787835A successfully refreshed from Google Patents.
US3787835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Converter for gyro-compass digital display
Assignee: International Standard Electric Corp
•
Filing: 1972-05-05
•
Granted: 1974-01-22
•
Expires: 1992-05-05
Abstract
Abstract A gyro-compass (synchro) analog output data encoder system for open-loop control of a digital bearing angle indicator in degrees and decimal parts of degrees. Applicable, in general, to digital presentation of shaft angle changes at a remote location.
Inventors
- 👤 O Mathiesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:40
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/02; G06F1/025; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/38; H; H03; H03M; H03M1/00; G06F2101/00; G06F2101/04; H03M1/06; H03M1/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
270 words
A signal converter responsive to a three-wire analog gyro data set for generating forward and backward pulses to control a digital display representative of angular displacements of a gyro transmitter, comprising: means for amplifying and limiting the signals of said data set discretely to form a corresponding set comprising first, second and third initial pulse trains of substantially uniform amplitude; means responsive to said sets of initial pulse trains for producing a set of summed pulse trains, including a first summed pulse train obtained by addition of said first and second initial pulse trains, a second summed pulse train obtained by addition of said second and third initial pulse trains, and a third summed pulse train obtained by addition of said first and third initial pulse trains, said summed pulse trains each thereby containing at least one pulse at each of a plurality of predetermined angular intervals, said pulses in each of said summed pulse trains being shifted in angular phase with respect to pulses in the other two summed pulse trains; direction logic means for storing at least the one of said summed pulse trains in which the most recent angle interval pulse occurred, and for generating a forward controlling pulse whenever a next pulse in time occurs in another of said summed pulse trains corresponding to increasing angular sense, and for generating a backward controlling pulse whenever a next pulse in time occurs in another of said summed pulse trains corresponding to decreasing angular sense, said controlling pulse generation being effected each time with reference to the one of said summed pulse trains containing said last occurring pulse.
Claim 2
Dependent Claim
270 words
A signal converter responsive to a three-wire analog gyro data set for generating forward and backward pulses to control a digital display representative of angular displacements of a gyro transmitter, comprising: means for amplifying and limiting the signals of said data set discretely to form a corresponding set comprising first, second and third initial pulse trains of substantially uniform amplitude; means responsive to said sets of initial pulse trains for producing a set of summed pulse trains, including a first summed pulse train obtained by addition of said first and second initial pulse trains, a second summed pulse train obtained by addition of said second and third initial pulse trains, and a third summed pulse train obtained by addition of said first and third initial pulse trains, said summed pulse trains each thereby containing at least one pulse at each of a plurality of predetermined angular intervals, said pulses in each of said summed pulse trains being shifted in angular phase with respect to pulses in the other two summed pulse trains; direction logic means for storing at least the one of said summed pulse trains in which the most recent angle interval pulse occurred, and for generating a forward controlling pulse whenever a next pulse in time occurs in another of said summed pulse trains corresponding to increasing angular sense, and for generating a backward controlling pulse whenever a next pulse in time occurs in another of said summed pulse trains corresponding to decreasing angular sense, said controlling pulse generation being effected each time with reference to the one of said summed pulse trains containing said last occurring pulse.
Claim 3
Dependent Claim
92 words
Apparatus according to claim 1 in which said direction logic means includes a tandem, two flip-flop circuit for each of said summed pulse trains, and clock pulse means, said flip-flops each being responsive to said clock pulses and, in tandem pairs, to the corresponding one of said summed pulse trains, such that only signals in said pulse trains in excess of a predetermined duration in cooperation with said clock pulses are able to produce switching of any of said flip-flop to output a signal representative of any of said summed pulse trains.
Claim 4
Dependent Claim
65 words
Apparatus according to claim 2 in which each of said summed pulse trains contains two pulses per degree of angular change of said gyro transmitter, said pulses being shifted in angular significance among said summed pulse trains in such a way that one pulse on a line corresponding to any of said summed trains is generated for each 1/6* angular change of said gyro transmitter.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |