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US3693022A Expired / Lapsed US ⏱️ 0.0 years remaining

Regulator-meter utilizing a beam of light for indication and regulation

Assignee: Societe dInstrumentation Schlumberger SA
•
Filing: 1970-09-03
•
Granted: 1972-09-19
•
Expires: 1990-09-03
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Abstract

Abstract Regulator-meter apparatus includes signal-responsive meter mechanism for projecting a light spot onto a transparent screen such that the spot traverses the screen during signal-caused movement of the mechanism. The position of the spot on the screen is detected by two photosensitive elements which define one set point for the regulator portion of the apparatus, the elements being spaced apart a distance slightly greater than the corresponding cross-sectional dimensions of the spot and having the outputs thereof connected to different ones of the set and reset inputs of a bistable multivibrator. The bistable assumes either its set or reset state depending upon the position of the spot relative to the elements. Circuitry is provided for effecting initial full-scale energization and de-energization of the mechanism, causing the bistable to assume a known initial state, for example, the reset state. The cross-sectional shape of the spot is defined by a suitably apertured mask, mounted so as to be responsive to the displacements of both a proportionaleffect and an integral-effect bimetallic element.

Inventors

  • 👤 Michel Dumast
  • 👤 Guy Rouzaud
  • 👤 Luc Thevenin

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 11:47
CPC Classifications
G; G01; G01D; G01D13/00; G01D13/22; G01D13/26

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 77 words
Apparatus comprising, a viewing medium, means for directing a light beam onto said medium for viewing, means responsive to beam radiation for producing an output electrical signal, a utilization device, bistable means coupled to said means responsive to beam radiation and responsive to said output signal to change state for controlling said utilization device and means for driving said means for directing through a predetermined initial cycle to drive said bistable means into an initial, predetermined state.
Claim 2
Dependent Claim 77 words
Apparatus comprising, a viewing medium, means for directing a light beam onto said medium for viewing, means responsive to beam radiation for producing an output electrical signal, a utilization device, bistable means coupled to said means responsive to beam radiation and responsive to said output signal to change state for controlling said utilization device and means for driving said means for directing through a predetermined initial cycle to drive said bistable means into an initial, predetermined state.
Claim 3
Dependent Claim 113 words
Apparatus comprising, a light-transmitting medium, optical means drivable by a signal under measurement for projecting a beam of light onto said medium, the driving of said optical means causing said beam to sweep said medium along a path, means located at a predetermined position on said path for producing an output electrical signal in response to incident radiation from said beam, bistable means coupled to the signal-producing means and changing state in response to said output signal, means for driving said optical means with a signal of predetermined magnitude sufficient to displace said beam past said signal-producing means at least once, whereby said bistable means is caused to assume a predetermined initial state.
Claim 4
Dependent Claim 113 words
Apparatus comprising, a light-transmitting medium, optical means drivable by a signal under measurement for projecting a beam of light onto said medium, the driving of said optical means causing said beam to sweep said medium along a path, means located at a predetermined position on said path for producing an output electrical signal in response to incident radiation from said beam, bistable means coupled to the signal-producing means and changing state in response to said output signal, means for driving said optical means with a signal of predetermined magnitude sufficient to displace said beam past said signal-producing means at least once, whereby said bistable means is caused to assume a predetermined initial state.
Claim 5
Dependent Claim 46 words
The apparatus as claimed in claim 2 wherein the signal producing means comprises, two photoelectric elements spaced apart along said path a distance slightly greater than the corresponding cross-sectional dimension of said beam, the region between said two elements defining a set point for the apparatus.

References Cited (Backward Citations)

US3028503A Cited
US3025038A Cited
US3054928A Cited
US3271677A Cited
US3271754A Cited
US3349245A Cited
US3309498A Cited
US3337739A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-09-19 1976-03-20 1976-09-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-09-19 1980-03-20 1980-09-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-09-19 1984-03-20 1984-09-19 $7700.00 Window Closed / Lapsed

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