Oscillating crystal force transducer and method of making
First Claim
1. In an oscillating crystal force transducer comprising support means, a substantially flat plate-shaped piezo-electric crystal having opposed flat sides and a relatively narrow peripheral edge means extending between said opposed sides, and two seating members carried by said support means and respectively engaging said peripheral edge means of said crystal and arranged to apply a force to said crystal along a line extending through said crystal from one of said seating members to the other of said seating members, the improvement wherein said support means comprises a looped substantially flat ribbon-like spring member having a longitudinal axis disposed in a generally U-shape and having opposed free end means spaced from each other to define the mouth of said looped spring member and respectively carrying said seating members whereby said crystal is disposed in said mouth of said looped spring member between said seating members thereof in a manner to be substantially coplanar with said longitudinal axis of said spring member.
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Abstract
An oscillating crystal force transducer and method of making the same are provided, the transducer comprising support structure, a plate-shaped piezo-electric crystal having opposed sides and a peripheral edge extending between the opposed sides, and two seating members carried by the support structure and respectively engaging the peripheral edge of the crystal and arranged to apply a force to the crystal along a line extending through the crystal from one of the seating members to the other of the seating members, the support structure comprising a looped spring member having opposed ends spaced from each other to define the mouth of the looped spring member and respectively carrying the seating members whereby the crystal is disposed in the mouth of the looped spring member between the seating members thereof.
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Citations
17 Claims
- 1. In an oscillating crystal force transducer comprising support means, a substantially flat plate-shaped piezo-electric crystal having opposed flat sides and a relatively narrow peripheral edge means extending between said opposed sides, and two seating members carried by said support means and respectively engaging said peripheral edge means of said crystal and arranged to apply a force to said crystal along a line extending through said crystal from one of said seating members to the other of said seating members, the improvement wherein said support means comprises a looped substantially flat ribbon-like spring member having a longitudinal axis disposed in a generally U-shape and having opposed free end means spaced from each other to define the mouth of said looped spring member and respectively carrying said seating members whereby said crystal is disposed in said mouth of said looped spring member between said seating members thereof in a manner to be substantially coplanar with said longitudinal axis of said spring member.
Specification