Force transducer, particularly for ballistic pressure measuring
US4379405A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1981 |
| Grant date | Apr 12, 1983 |
| Priority date | — |
| Expiry date | Jun 5, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A force transducer, particularly for the ballistic measuring of the combustion pressure in the cartridge case of a firearm, is disclosed which includes a force transmission element which rests with one of its front areas on the cartridge case. The force transmission element is surrounded on its exterior by an outer sleeve which also rests with its front area on the cartridge case. The front areas of the force transmission element and of the outer sleeve are exactly adapted to the curvature of the cartridge case by reaming after the transducer has been mounted in the firearm. With the combustion of the powder, the cartridge case expands and transmits its force to a sensor element via the force transmission element, with the sensor element being preferably in the form of at least one piezoelectric transversal quartz element which is held under pretension between the force transmission element and a basic receiver component. The spring rigidity of the force transmission element and the spring rigidity of the outer sleeve are matched in such a way that both parts yield essentially to the same extent to the pressures acting upon them in the axial direction of the transducer. The result …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.