US3955070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring variable quantities
Assignee: Komatsu Ltd
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Filing: 1974-05-01
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Granted: 1976-05-04
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Expires: 1994-05-01
Abstract
Abstract In an apparatus for measuring variable quantities such as fluid pressure, stress and strain there are provided an electric pulse generator for generating an electric pulse during a measuring interval in which the quantity to be measured exceeds a preset value, a counter for counting the number of pulses and a time measuring apparatus for cumulatively adding the measuring intervals. By providing a plurality of sets of the elements described above responsive to different set values, the variation of the quantity over a long period of time can be precisely supervised.
Inventors
- 👤 Keisuke Suzuki
- 👤 Toru Fukumura
- 👤 Okinori Moriya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:45
CPC Classifications
G; G01; G01D; G01D1/00; G01D1/14; G01L; G01L1/00; G01L1/005; G01L19/00; G01L19/08; G01L19/083
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
Apparatus for monitoring surges in a variable quantity such as fluid pressure, stress or strain, comprising a plurality of pulse generator means each responding to said quantity exceeding a preset value therefor by generating an electric pulse having a predetermined level during the interval in which said quantity exceeds said preset value, the preset values to which the different pulse generator means respond being different from one another, a plurality of counters each counting the number of said pulses generated by a corresponding pulse generator means, and a plurality of time measuring apparatus each cumulatively adding the durations of said pulses generated by a corresponding pulse generator means.
Claim 2
Dependent Claim
108 words
Apparatus for monitoring surges in a variable quantity such as fluid pressure, stress or strain, comprising a plurality of pulse generator means each responding to said quantity exceeding a preset value therefor by generating an electric pulse having a predetermined level during the interval in which said quantity exceeds said preset value, the preset values to which the different pulse generator means respond being different from one another, a plurality of counters each counting the number of said pulses generated by a corresponding pulse generator means, and a plurality of time measuring apparatus each cumulatively adding the durations of said pulses generated by a corresponding pulse generator means.
Claim 3
Dependent Claim
68 words
Apparatus as claimed in claim 1, wherein each said pulse generator means comprises a pressure-electro converter, an amplifier for amplifying the output of said pressure-electro converter, and a comparator which compares the output of said amplifier with a reference voltage representing said preset value to which that pulse generator means responds for generating an output when the output voltage of said amplifier is higher than said reference voltage.
Claim 4
Dependent Claim
83 words
Apparatus as claimed in claim 1, wherein each time measuring apparatus comprises a timer, a current source, and a switching circuit which defines a controlled current path between the current source and the timer and is connected to the pulse generator means in such manner that said controlled current path is closed only when a pulse from said corresponding pulse generator means is applied to the time measuring apparatus, the timer measuring the duration for which it receives current from said current source.
Claim 5
Dependent Claim
34 words
An apparatus as claimed in claim 1, wherein each said pulse generator means comprises a pressure switch responsive to said preset value to which that pulse generator means responds for generating an electrical output.
Claim 6
Dependent Claim
43 words
Apparatus as claimed in claim 1, wherein each said time measuring apparatus comprises an integrator for successively integrating pulses produced by said corresponding generator means, and display means for displaying an indication of the time represented by the integrated value of the pulses.
Claim 7
Dependent Claim
55 words
Apparatus as claimed in claim 1, wherein each said counter comprises a plurality of decimal counting devices and a plurality of memory devices associated respectively with the counting devices for storing the contents of the respective counting devices, the number of counting devices being equal to the number of orders of magnitude to be counted.
Claim 8
Independent Claim
87 words
A method of monitoring surges in a variable quantity such as fluid pressure, stress or strain, comprising the steps of responding to the quantity exceeding each of a plurality of different preset values by generating respective electric pulses each having a predetermined level during the intervals for which the quantity exceeds the preset values respectively, and employing the pulses to count the number of times each of said preset values is exceeded and to add cumulatively the durations for which each of said preset values is exceeded.
Claim 9
Independent Claim
87 words
A method of monitoring surges in a variable quantity such as fluid pressure, stress or strain, comprising the steps of responding to the quantity exceeding each of a plurality of different preset values by generating respective electric pulses each having a predetermined level during the intervals for which the quantity exceeds the preset values respectively, and employing the pulses to count the number of times each of said preset values is exceeded and to add cumulatively the durations for which each of said preset values is exceeded.
References Cited (Backward Citations)
US3480911A
Cited
US3627995A
Cited
US3793512A
Cited
US3665165A
Cited
US3769844A
Cited
US3733424A
Cited
US3766535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |