Measuring and testing – Dynamometers – Responsive to force
Patent
1983-11-23
1986-01-14
Miles, Tim
Measuring and testing
Dynamometers
Responsive to force
7386206, 73708, G01L 102
Patent
active
045639060
ABSTRACT:
The load measurement apparatus includes a pressure arm 60 rigidly coupled to a structural member whose load is to be measured, and a miniature instrumented hydrostatic cell rigidly mounted in proximity to the pressure arm so that a membrane of the cell engages the pressure arm and displaces as the pressure arm displaces. In one embodiment, the cell includes a housing consisting of a first cylindrical portion 20 and a second cylindrical portion 22 integral with and centrally projecting from the first cylindrical portion. A cylindrical cavity 24 is formed within the housing portions and coaxial therewith. At one end, the cavity is closed by a thin membrane 26, and at its other end, the cavity communicates with a threaded bore that receives and is closed by female portion 34 and male portion 36 of a seal. A temperature compensation insert 30 is disposed within the cavity, and the portions of the cavity not occupied by the insert are completely filled with an incompressible fluid that is introduced through the seal. The pressure within the cavity is measured by a pressure transducer 50. The cell is disposed within a cavity of a receptacle member 64 and the membrane thereof is urged into engagement with a sphere 66 embedded in the pressure arm by a pair of Belleville disc springs 72, 74 disposed within the receptacle member cavity and by an adjustment plug 78 threadably received in that cavity.
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Camtech Inc.
Miles Tim
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