US3889540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the feeler displacement of an electronic dimensional
Assignee: Societe Genevoise dInstruments de Physique
•
Filing: 1973-03-05
•
Granted: 1975-06-17
•
Expires: 1993-03-05
Abstract
Abstract An improvement in electronic dimensional sensors using feelers, comprises means for automatically adding to or subtracting from the micro-indicator display of the sensor a pre-set feeler displacement value corresponding to a chosen measuring force, thus avoiding the need to take unavoidable feeler displacements into account when calculating the measured dimension. To be able to measure in both directions with the sensor there is further provided with a device for detecting the sign of the measurement in order to decide in which terms the value measured has to be modified before being displayed.
Inventors
- 👤 Werner Widmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:48
CPC Classifications
G; G01; G01B; G01B7/00; G01B3/00; G01B3/002; G01B3/008
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
In an electronic dimensional sensor having a displaceable feeler that bears against a surface to measure a dimension corresponding to the position of said surface, and a microindicator display of feeler displacement; the improvement comprising means for adding to or subtracting from the displayed displacement a value equal to the value of feeler displacement corresponding to a predetermined force between said feeler and said surface, and means to detect the sign of the measurement and to effect said addition or subtraction according to said sign, said adding or subtracting means comprising, connected to the output of a digital voltmeter, an adder and subtracter controlled both by the sign of the measurement and by control switches, said adder and subtracter feeding a numerical display means.
Claim 2
Dependent Claim
124 words
In an electronic dimensional sensor having a displaceable feeler that bears against a surface to measure a dimension corresponding to the position of said surface, and a microindicator display of feeler displacement; the improvement comprising means for adding to or subtracting from the displayed displacement a value equal to the value of feeler displacement corresponding to a predetermined force between said feeler and said surface, and means to detect the sign of the measurement and to effect said addition or subtraction according to said sign, said adding or subtracting means comprising, connected to the output of a digital voltmeter, an adder and subtracter controlled both by the sign of the measurement and by control switches, said adder and subtracter feeding a numerical display means.
Claim 3
Dependent Claim
160 words
In an electronic dimensional sensor having a displaceable feeler that bears against a surface to measure a dimension corresponding to the position of said surface, and a micro-indicator display of feeler displacement; the improvement comprising means for adding to or subtracting from the displayed displacement a value equal to the value of feeler displacement corresponding to a predetermined force between said feeler and said surface, means to detect the sign of the measurement and to effect said addition or subtraction according to said sign, and at least one source of adjustable direct current voltage connected either to a neutral terminal of a digital or analog voltmeter or to an amplifier with a gain of at least one which is itself connected to said neutral terminal of the voltmeter, said detector means causing said terminal of the voltmeter to be switched over either to said voltage source or to the amplifier, according to whether the measuring signal is positive or negative.
Claim 4
Dependent Claim
160 words
In an electronic dimensional sensor having a displaceable feeler that bears against a surface to measure a dimension corresponding to the position of said surface, and a micro-indicator display of feeler displacement; the improvement comprising means for adding to or subtracting from the displayed displacement a value equal to the value of feeler displacement corresponding to a predetermined force between said feeler and said surface, means to detect the sign of the measurement and to effect said addition or subtraction according to said sign, and at least one source of adjustable direct current voltage connected either to a neutral terminal of a digital or analog voltmeter or to an amplifier with a gain of at least one which is itself connected to said neutral terminal of the voltmeter, said detector means causing said terminal of the voltmeter to be switched over either to said voltage source or to the amplifier, according to whether the measuring signal is positive or negative.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |