Battery holder and three-position switch for hearing aid unit |
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| 申请号 | US3701862D | 申请日 | 1971-04-16 | 公开(公告)号 | US3701862A | 公开(公告)日 | 1972-10-31 |
| 申请人 | GOULD INC; | 发明人 | VIGNINI WALTER R; | ||||
| 摘要 | A hearing aid switch of the type shown in U.S. Pat. No. 3,475,566 issued Oct. 28, 1969, is provided with additional contact position to add an additional mode of operation without increasing the size of the switch or the structure in which it is contained. The switch has three positions: an ''''on'''' position which connects the microphone of the hearing aid unit to the amplifier, a ''''mid'''' position which connects an additional transducer in the hearing aid to the amplifier (as for instance a telephone pick-up) and an ''''off'''' position. | ||||||
| 权利要求 | 1. A hearing aid switch mechanism comprising a chamber; a battery cover rotatably mounted in said chamber, said cover having means for retaining a battery; a stationary contact in said chamber engaging a side of said battery; a peripheral contact in said chamber; said contact being biased toward engagement with a periphery of said battery; said cover and said battery being rotatable from an ''''off'''' position to a second position and a third position; said cover blocking engagement between said peripheral contact and the periphery of said battery when the cover is in the ''''off'''' position; a recess in said cover registering with said peripheral contact and permitting the same to engage the periphery of said battery when the cover is in the second and third position; and an additional contact; a contact operating boss on said cover; the said contact operating boss engaging said additional contact when the rotatable cover is in said second position and disengaging said additional contact when the rotatable cover is in the third position. 2. The hearing aid switch mechanism of claim 1 in which said cover is also provided with a detent boss; a detent member in said chamber; said detent boss and said detent member being interengaged when said contact operating boss is in operating engagement with said additional contact. 3. The hearing aid switch mechanism of claim 1 in which said chamber is provided with two complementary contacts adjacent said additional contact; said additional contact being biased to engagement with one of the two complementary contacts; said contact operating boss moving said additional contact to engagement with the other of the complementary contacts. 4. The hearing aid switch mechanism of claim 3; a hearing aid; said switch mechanism being contained in said hearing aid; said hearing aid having a microphone, a telephone pick-up and an amplifying system; one of said complementary contacts of said switch mechanism being connected to said microphone and the other of said complementary contacts being connected to said telephone pick-up. 5. The hearing aid of claim 4 in which the peripheral contact, the amplifier and the additional contact are in series with each other. |
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