US3732732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature measuring method
Assignee: Owens Corning
•
Filing: 1970-11-20
•
Granted: 1973-05-15
•
Expires: 1990-11-20
Abstract
Abstract This invention relates generally to frequency measuring apparatus and more particularly to the use of such frequency measuring apparatus in condition sensing apparatus which may be utilized for sensing a variable condition and controlling the variable condition. Further, the inventive concept is particularly applicable in fiber producing apparatus.
Inventors
- 👤 W Trethewey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:30
CPC Classifications
B; B65; B65H; B65H59/00; B65H59/38; B65H59/384; B65H59/385; C; C03; C03B; C03B37/00; C03B37/07; G; G01; G01K; G01K7/00; G01K7/32; G01R; G01R23/00; G01R23/02; G05; G05D; G05D23/00; G05D23/19; G05D23/1917; G05D23/20; G05D23/22; B65H2515/00; B65H2515/40; B65H2701/00; B65H2701/30; B65H2701/31; B65H2701/312; B65H2701/3122
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
A method of measuring the temperature of molten glass comprising the steps of generating a frequency signal which is variable in proportion to the variation of the temPerature of the molten glass, selecting a known portion of the cyclic variation of said temperature frequency signal, initiating a count at the beginning of said known portion, and terminating the count at the end of said known portion to obtain a count proportional to the temperature of said molten glass, the frequency of the count being higher than the temperature signal frequency, said known portion selecting step including detecting a reversal of polarity of said temperature frequency signal to initiate said counting step.
Claim 2
Independent Claim
111 words
A method of measuring the temperature of molten glass comprising the steps of generating a frequency signal which is variable in proportion to the variation of the temPerature of the molten glass, selecting a known portion of the cyclic variation of said temperature frequency signal, initiating a count at the beginning of said known portion, and terminating the count at the end of said known portion to obtain a count proportional to the temperature of said molten glass, the frequency of the count being higher than the temperature signal frequency, said known portion selecting step including detecting a reversal of polarity of said temperature frequency signal to initiate said counting step.
Claim 3
Dependent Claim
31 words
A method as defined in claim 1 in which said known portion selecting step includes detecting a later reversal of polarity of said temperature frequency signal to terminate said counting step.
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |