Movement indicator
US4058079A · kind A · utility
Inventors
Key dates
| Filing date | Jun 10, 1976 |
| Grant date | Nov 15, 1977 |
| Priority date | — |
| Expiry date | Jun 10, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21F17/185
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a device for indicating a preset amount of relative movement between two points, an indicator sleeve axially movable in a cylindrical bore in a housing fixed to one of the points remains flush with the housing until the preset amount of movement is reached at which point the sleeve pops up to give a positive, easily identifiable indication of the movement. An actuating rod which bears against and follows the second point is axially slidable in the sleeve and operates a ball bearing mechanism which locks the indicator sleeve in the retracted position. The amount of movement required to generate the discrete indication is easily variable and monitoring of the actual displacement is always available.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.