US3766535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telethermometer receiver and display device
Assignee: Magnavox Electronic Systems Co
•
Filing: 1972-04-14
•
Granted: 1973-10-16
•
Expires: 1992-04-14
Abstract
Abstract A device for receiving a signal having a frequency which is a linear function of a temperature being monitored at a remote location and for providing a display of that temperature value is disclosed. The display digits are energized in accordance with the values stored in respective ones of a plurality of concatenated decade counters which in turn periodically receive their count by gating into them, for a prescribed length of time, a reshaped demodulated signal which is in turn derived from the received signal. This demodulated signal is mixed with a predetermined frequency from a signal source the frequency of which corresponds to 0* Fahrenheit. Decision means for providing a sign indication for positive or negative temperatures is also disclosed.
Inventors
- 👤 G Deebel
- 👤 B Doden
- 👤 M Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:45
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/02; G01K1/028
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
122 words
A device for receiving a signal the frequency of which is a function of a physical parameter being monitored at a remote location and for providing an output indicative of the value of that physical parameter comprising: a signal source of a predetermined frequency; means for combining said received signal and said predetermined frequency signal to provide a resultant signal having a frequency which is the difference of the frequencies of the two combined signals; decision means for providing a first indication if said received signal frequency exceeds said predetermined signal frequency and a second indication if said received signal frequency does not exceed said predetermined signal frequency; and means for providing an indication of the magnitude of said resultant signal frequency.
Claim 2
Independent Claim
122 words
A device for receiving a signal the frequency of which is a function of a physical parameter being monitored at a remote location and for providing an output indicative of the value of that physical parameter comprising: a signal source of a predetermined frequency; means for combining said received signal and said predetermined frequency signal to provide a resultant signal having a frequency which is the difference of the frequencies of the two combined signals; decision means for providing a first indication if said received signal frequency exceeds said predetermined signal frequency and a second indication if said received signal frequency does not exceed said predetermined signal frequency; and means for providing an indication of the magnitude of said resultant signal frequency.
Claim 3
Dependent Claim
28 words
The device of claim 1 wherein said decision means comprises a counter and means for gating the received signal to the counter for a prescribed length of time.
Claim 4
Dependent Claim
25 words
The device of claim 2 further comprising means for resetting said counter to an initial state prior tO gating the received signal to the counter.
Claim 5
Dependent Claim
31 words
The device of claim 2 wherein said means for providing comprises a second counter and means for gating the resultant signal to the second counter for a prescribed length of time.
Claim 6
Dependent Claim
27 words
The device of claim 4 further comprising means for resetting the second counter to an initial value prior to gating the resultant signal to the second counter.
Claim 7
Dependent Claim
45 words
The device of claim 4 wherein said second counter comprises a first plurality of cascaded decade counters and said means for providing further comprises a second plurality of decimal digit display devices for providing a visual indication of the magnitude of said resultant signal frequency.
Claim 8
Dependent Claim
29 words
The device of claim 1 wherein said means for providing comprises a counter and means for gating the resultant signal to the counter for a prescribed length of time.
Claim 9
Dependent Claim
25 words
The device of claim 7 further comprising means for resetting the counter to an initial state prior to gating the resultant signal to the counter.
Claim 10
Dependent Claim
44 words
The device of claim 7 wherein said counter comprises a first plurality of cascaded decade counters and said means for providing further comprises a second plurality of decimal digit display devices for providing a visual indication of the magnitude of said resultant signal frequency.
Claim 11
Dependent Claim
38 words
The device of claim 1 wherein the received signal frequency is a substantially linear function of the physical parameter and the physical parameter being monitored is temperature, said predetermined signal having a frequency which corresponds to 0* Fahrenheit.
Claim 12
Dependent Claim
43 words
The device of claim 1 wherein the physical parameter being monitored is temperature and the received signal frequency (f) is a substantially linear function of the temperature (T) and may be represented by f K1T + K2 where K1 and K2 are constants.
Claim 13
Dependent Claim
31 words
The device of claim 11 wherein K2 is of the form 2n where n is any natural number and said decision means comprises a binary counter having n + 1 stages.
Claim 14
Dependent Claim
48 words
The device of claim 11 wherein said predetermined frequency is K2 cycles per second and said means for providing comprises; a divide by ''''a'''' counter, and means for gating the resultant signal to the counter for b seconds where a and b are real numbers and a/b K1.
Claim 15
Dependent Claim
31 words
The device of claim 13 wherein K2 is of the form 2n where n is any natural number and said decision means comprises a binary counter having n + 1 stages.
Claim 16
Dependent Claim
68 words
The device of claim 13 where b 1, said counter comprising a first plurality of cascaded decade counters, and said means for providing further comprises a second plurality of decimal digit display devices for providing a visual indication of the magnitude of said resultant signal frequency, said first plurality exceeding said second plurality by 1 and there being no display device coupled to the lowest order decade counter.
Claim 17
Dependent Claim
31 words
The device of claim 15 wherein K2 is of the form 2n where n is any natural number and said decision means comprises a binary counter having n + 1 stages.
Claim 18
Independent Claim
199 words
A device for receiving a signal the frequency (f) of which is, at least under steady state conditions, a substantially linear function of a physical parameter (P) being monitored at a remote location and which may be represented by f K1P + K2 where K1 and K2 are constants, and for providing an output indicative of the value of that physical parameter comprising: a signal source having a frequency of K2 cycles per second; means for combining the received signal and the signal from said source to provide a resultant signal having a frequency which is the difference of the frequencies of the two combined signals; and means for proviDing an indication of the magnitude of said resultant signal frequency including a divide by K1 counter and means for gating the resultant signal to the counter for one second, said counter comprising a first plurality of cascaded decade counters, and said means for providing further comprising a second plurality of decimal digit display devices for providing a visual indication of the magnitude of said resultant signal frequency, said first plurality exceeding said second plurality by one and there being no display device coupled to the lowest order decade counter.
Claim 19
Independent Claim
199 words
A device for receiving a signal the frequency (f) of which is, at least under steady state conditions, a substantially linear function of a physical parameter (P) being monitored at a remote location and which may be represented by f K1P + K2 where K1 and K2 are constants, and for providing an output indicative of the value of that physical parameter comprising: a signal source having a frequency of K2 cycles per second; means for combining the received signal and the signal from said source to provide a resultant signal having a frequency which is the difference of the frequencies of the two combined signals; and means for proviDing an indication of the magnitude of said resultant signal frequency including a divide by K1 counter and means for gating the resultant signal to the counter for one second, said counter comprising a first plurality of cascaded decade counters, and said means for providing further comprising a second plurality of decimal digit display devices for providing a visual indication of the magnitude of said resultant signal frequency, said first plurality exceeding said second plurality by one and there being no display device coupled to the lowest order decade counter.
Claim 20
Independent Claim
168 words
A device for receiving a signal the frequency of which is a function of a physical parameter being monitored at a remote location and for providing an output indicative of the value of that physical parameter comprising: means for providing an intermediate frequency signal derived from said received signal; a bi-stable device for reshaping said intermediate frequency signal; a first plurality of cascaded decade counters and a second plurality of decimal digit display devices coupled thereto for providing a visual indication of the magnitude of the intermediate frequency signal, said first plurality exceeding said second plurality by one and there being no display device coupled to the lowest order decade counter; gate means having timing means associated therewith for passing said intermediate frequency signal to the lowest order decade counter for a prescribed length of time; and decision means for providing a first indication if said received signal frequency exceeds a predetermined value and a second indication if said received signal frequency does not exceed said predetermined value.
Claim 21
Independent Claim
168 words
A device for receiving a signal the frequency of which is a function of a physical parameter being monitored at a remote location and for providing an output indicative of the value of that physical parameter comprising: means for providing an intermediate frequency signal derived from said received signal; a bi-stable device for reshaping said intermediate frequency signal; a first plurality of cascaded decade counters and a second plurality of decimal digit display devices coupled thereto for providing a visual indication of the magnitude of the intermediate frequency signal, said first plurality exceeding said second plurality by one and there being no display device coupled to the lowest order decade counter; gate means having timing means associated therewith for passing said intermediate frequency signal to the lowest order decade counter for a prescribed length of time; and decision means for providing a first indication if said received signal frequency exceeds a predetermined value and a second indication if said received signal frequency does not exceed said predetermined value.
Claim 22
Dependent Claim
28 words
The device of claim 18 further comprising filter means disposed between said means for providing and said bi-stable device for preventing unwanted harmonics from triggering said bi-stable device.
Claim 23
Dependent Claim
30 words
The device of claim 17 further comprising decision means for providing a first indication if f is greater than K2 and a second indication if f does not exceed K2.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |