Instrument for measuring lengths or angles
US5937533A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Jun 12, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B3/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring instrument comprises a column (10) on which is mounted a carriage (11) with a drive cursor (12) and a measuring cursor (20) sliding on the drive cursor (12) and carrying a measuring contact (24) and a measuring device (40). A measuring force device (25) is arranged between the two cursors and determines, thanks to a lever (26) a rest position and two measuring positions vertically upwardly or downwardly offset or corresponding to a predetermined measuring force on the member to be measured. A motor (15) displaces the drive cursor (12) and the position detector (36) permits measuring the relative position between the two cursors. A control unit (35) controls the speed and direction of rotation of the motor (15) as a function either of the signals (44) received from the position detector (36) or from two external contacts (42, 43). The carriage (11) is first displaced by means of the external contacts (42, 43) and as soon as the lag between the two cursors reaches an upper or lower limit, the control of the motor is effected as a function of the signals received from the position detector (36). There is thus obtained a double subjection of the speed of movement of the car…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.