Ultrasonic transducer for use in a vibratory environment
First Claim
Patent Images
1. An electroacoustical transducer assembly, comprising:
- a relatively inflexible backplate having an electrically conductive major surface and having another electrically conductive surface, that is electrically connected to said major surface, on the opposite side thereof;
a relatively flexible diaphragm having electrically conductive and electrically nonconductive surfaces on opposite sides thereof; and
an electrically conductive spring for connecting said backplate to an electrical circuit, for urging said major backplate surface into engagement with said electrically nonconductive diaphragm surface and for properly tensioning said diaphragm, said spring and said backplate having portions thereof adapted for press fit engagement with one another when said spring is mounted on said transducer assembly to urge said backplate into engagement with said diaphragm surface and to properly tension said diaphragm.
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Accused Products
Abstract
A capacitance-type electrostatic transducer is provided that can be operated in an environment where it may be subjected to excessive mechanical vibrations. Unwanted gain variations and/or spurious electrical signals produced by said transducer when operated in such an environment are precluded, at reduced cost, by mechanically attaching the electrically conductive transducer spring that urges the backplate into cooperative engagement with the vibratile diaphragm of said transducer, to said transducer backplate.
12 Citations
13 Claims
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1. An electroacoustical transducer assembly, comprising:
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a relatively inflexible backplate having an electrically conductive major surface and having another electrically conductive surface, that is electrically connected to said major surface, on the opposite side thereof; a relatively flexible diaphragm having electrically conductive and electrically nonconductive surfaces on opposite sides thereof; and an electrically conductive spring for connecting said backplate to an electrical circuit, for urging said major backplate surface into engagement with said electrically nonconductive diaphragm surface and for properly tensioning said diaphragm, said spring and said backplate having portions thereof adapted for press fit engagement with one another when said spring is mounted on said transducer assembly to urge said backplate into engagement with said diaphragm surface and to properly tension said diaphragm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In an electroacoustical transducer assembly comprising a relatively inflexible backplate having electrically conductive opposed major surfaces in common electrical connection, a flexible diaphragm extending across one of said major surfaces, an electrically conductive spring having one portion in engagement with the other of said major surfaces to urge said backplate into proper tensioning contact with said diaphragm and to provide electrical contact to said backplate, the improvement wherein said spring portion is in press fit engagement with a portion of said backplate to provide a vibration resistant conductive path between said spring and said backplate.
- 10. In an electroacoustical transducer having a diaphragm, a backplate and a spring, said spring being arranged in engagement with one major surface of said backplate to urge another major surface thereof into engagement with said diaphragm and to provide electrical connection to said backplate, the improvement comprising a projection on said backplate, and means carried by said spring for cooperating with said projection in a press fit, to fixedly attach said spring to said backplate in a low electrical resistance connection thereto.
Specification