Vibrating beam force transducer with A-frame beam root and frequency adjusting means
First Claim
1. In a vibrating beam force transducer comprising a piezoelectric beam structure having first and second ends, and means for inducing a vibration in the piezoelectric beam, the improvement comprising:
- an adjustment mass formed at the center of said beam, said adjustment mass made up of said piezoelectric material, whereby parts of said adjustment mass can be broken off to adjust the bias frequency of said vibrating beam; and
further including first and second legs at each end of said beam for directly mounting said beam to a support structure or mass.
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Accused Products
Abstract
A vibrating beam force transducer includes a piezoelectric beam structure supported at first and second ends, and an oscillator for inducing a vibration in the piezoelectric beam. To permit adjusting the bias frequency of the beam, an adjustment mass is formed at the center of the beam, the adjustment mass made of piezoelectric material. Part of the adjustment mass can be broken off to adjust the bias frequency. The first and second ends are attached to the a support structure by first and second legs at each end of the beam, the legs having an angle therebetween, thereby forming an A-frame mount.
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Citations
20 Claims
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1. In a vibrating beam force transducer comprising a piezoelectric beam structure having first and second ends, and means for inducing a vibration in the piezoelectric beam, the improvement comprising:
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an adjustment mass formed at the center of said beam, said adjustment mass made up of said piezoelectric material, whereby parts of said adjustment mass can be broken off to adjust the bias frequency of said vibrating beam; and further including first and second legs at each end of said beam for directly mounting said beam to a support structure or mass. - View Dependent Claims (2, 3, 15)
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4. In a vibrating beam force transducer comprising a piezoelectric beam structure having first and second ends and means for inducing a vibration in the piezoelectric beam, the improvement comprising:
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an adjustment mass formed at the center of said beam, said adjustment mass made up of said piezoelectric material, whereby parts of said adjustment mass can be broken off to adjust the bias frequency of said vibrating beam; wherein said first and second ends are attached to a support structure, and further including first and second legs at each end of said beam mounting said beam to said support structure, said legs forming an angle therebetween to thereby form an A-frame mount. - View Dependent Claims (5, 6, 7, 9, 12, 13, 14)
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8. In a vibrating beam force transducer comprising:
- a piezoelectric beam structure supported at first and second ends; and
means for inducing a vibration in the piezoelectric beam;
said first and second ends attached to a support structure, the improvement comprising first and second legs at each end of said beam mounting said beam to said support structure, said legs forming an angle therebetween to thereby form an A-frame mount. - View Dependent Claims (10, 11)
- a piezoelectric beam structure supported at first and second ends; and
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16. In a vibrating beam force transducer comprising a piezoelectric beam structure having first and second ends, a pair of isolator means, and means for inducing a vibration in the piezoelectric beam, the improvement comprising:
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an adjustment mass formed at the center of said beam, said adjustment mass made up of said piezoelectric material, whereby parts of said adjustment mass can be broken off to adjust the bias of frequency of said vibrating beam; and further including first and second legs at each end of said beam for mounting said beam to said isolator means. - View Dependent Claims (17, 18, 19, 20)
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Specification