Horn apparatus
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United States of America Patent
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Sep 12, 2017
Grant Date -
Mar 17, 2016
app pub date -
Sep 9, 2015
filing date -
Sep 12, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
It is an object of the present invention is to smoothen air flow at the time of vibrations of the diaphragm, and to suppress variations in acoustic characteristics. Since the inclined surface 37c of the washer 37, which forms the air flow channel 50, is an inclined surface having a diameter gradually reduced with distance from the diaphragm 35 in the axial direction of the movable iron core 36, compared with the conventional step-shaped air flow channel having vertical surfaces, air flow in the air flow channel 50 can be smoothened. Therefore, disturbance in air flow is not easily generated in the air flow channel 50, and variations in acoustic characteristics of the horn apparatus 10 can be suppressed.
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Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Mar 12, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 12, 2029 |
