Gauge for measuring tree-trunk growth and the like
US5067246A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1991 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Mar 1, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B3/1041
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gauge for measuring a change in the spacing between two locations has a support that is fixed at one of the locations and a wheel pivotal on the support about an upright axis and having an outer periphery. The wheel periphery and the support have juxtaposed portions one of which is provided with a pointer and the other of which is provided with a scale so that the pointer moves along the scale as the wheel pivots on the support. A flexible belt has an inner end anchored on the support, a middle portion, and an outer end attached at the other location. This outer end is releasably fixed to the wheel periphery and a spring urges the wheel rotationally on the support in a direction pulling the middle belt portion taut between the locations. Thus as the two locations move relative to each other the pointer moves relative to the scale.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.