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US 4,064,763 AGranted
Accelerometer for measuring pump rod displacement
AssigneeShell Oil Company
InventorKrishnaswamy Srinivasan
Life of this patent
Estimating the term…
Abstract
A strain gage accelerometer having a large mass suspended by thin support plates with strain gages disposed on the support plates and connected to maximize response along one axis while minimizing response along directions at right angles to the first axis.
Claims8
An accelerometer for measuring low amplitude, low frequency accelerations along one axis and discriminating against acceleration along axes at right angles to said one axis;
- said accelerometer comprising:
- a closed cylindrical housing;
- a pair of spaced circular diaphragms, said diaphragms being mounted in said housing in a spaced parallel relation to divide said housing into three enclosed spaces within said housing;
- a weighted member, said member being disposed in the space between said diaphragms and fastened to both said diaphragms;
- conduit means disposed to provide fluid communication between the other two spaces;
- a plurality of strain gages, at least one of said strain gages being mounted on each of said diaphragms with their sensitive axis disposed in a radial direction;
- and
- circuit means, said strain gages being coupled to said circuit means in a manner to cancel response along axes transverse to the axis of said cylindrical housing.
5 more elements
Dependencies are inferred from the claim text.