US4534045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for recording host electronic instrument operating on-time
Assignee: Tektronix Inc
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Filing: 1983-11-28
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Granted: 1985-08-06
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Expires: 2003-11-28
Abstract
Abstract The instrument operating time recorder (10) is attached to host instrument (12) and includes a frequency divider (14) for counting line voltage transitions during power-on time and to generate a binary output for a prescaler (20). Prescaler (20) divides by a predetermined value set to the frequency of the host instrument and generates a signal for a digital decoder (24) the output of which can be applied to the readout or display (26).
Inventors
- 👤 Warren Collier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:29
CPC Classifications
G; G07; G07C; G07C3/00; G07C3/02; G07C3/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
Device for host electronic instrument operating time recording, comprising: a frequency divider circuit means for counting line voltage transitions during power-on time of said host instrument and for generating binary number signals, a prescaler circuit means for receiving said binary number signals and dividing said binary number signals by a predetermined numerical value to establish a reduced time resolution for the power-on time of said host instrument, binary divider chain circuit means which receives the prescaled output signal from said prescaler and generates a digital number output, and display means for receiving said digital number output for visual readout of the power-on time of said host instrument.
Claim 2
Dependent Claim
107 words
Device for host electronic instrument operating time recording, comprising: a frequency divider circuit means for counting line voltage transitions during power-on time of said host instrument and for generating binary number signals, a prescaler circuit means for receiving said binary number signals and dividing said binary number signals by a predetermined numerical value to establish a reduced time resolution for the power-on time of said host instrument, binary divider chain circuit means which receives the prescaled output signal from said prescaler and generates a digital number output, and display means for receiving said digital number output for visual readout of the power-on time of said host instrument.
Claim 3
Dependent Claim
25 words
The device according to claim 1 and in which a digital decoder circuit means is disposed between said binary divider chain and said display means.
Claim 4
Dependent Claim
43 words
The device according to claim 1 and in which a decoder circuit means receives said digital number output from said binary divider chain and generates a direct current voltage proportional to said power-on time and outputs said proportional voltage to a display means.
Claim 5
Dependent Claim
22 words
The device of claim 1 and in which said prescaler circuit means is set to divide said binary number signals by 3600.
Claim 6
Dependent Claim
23 words
The device according to claim 1 and in which said prescaler circuit means is set to divide said binary number signals by 3000.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |