Patent US3828142A successfully refreshed from Google Patents.
US3828142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical hearing aid
Assignee: Siemens AG
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Filing: 1973-04-18
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Granted: 1974-08-06
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Expires: 1993-04-18
Abstract
Abstract An electrical hearing aid is operated by the current of a current source provided in the casing of the hearing aid in a holder movable therein to exchange the source. The operating current is switched on and off by the movement of the holder and the closing or opening of contacts. An element effective between the holder and the casing snaps in rest locations in the switched on and switched off positions of the holder. The invention is particularly characterized by the provision of a closing device located between the holder and the casing and movable in and out to limit the movement of the holder at most to the switching operation and at least to an opening which just about prevents the removal of the battery.
Inventors
- 👤 G Buttner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:27
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/60; H04R25/602; H01; H01H; H01H2300/00; H01H2300/004; H04R25/607
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
180 words
An electric hearing aid, comprising a casing, a holder mounted in said casing and movable between a switching position and an open position, a source of electrical energy carried by said holder, contacts engaging said source in the switching position of said holder, means connected with said contacts for receiving and amplifying sounds, a locking device located between and connected with said holder and said casing for limiting the movement of said holder to one between said switching position and a position adjacent to said open position, but preventing the removal of said source, said locking device comprising a resilient hook, said holder being round and comprising a lug and a hook carried by said lug and directed inwardly relatively to the roundness of said holder, the last-mentioned hook being adapted to engage behind the first-mentioned hook during a closing movement of said holder, a resilient extension piece carried by said casing and carrying the first-mentioned hook, and a pressure key adapted to engage the first-mentioned hook to move it out of the path of movement of the second-mentioned hook.
Claim 2
Dependent Claim
180 words
An electric hearing aid, comprising a casing, a holder mounted in said casing and movable between a switching position and an open position, a source of electrical energy carried by said holder, contacts engaging said source in the switching position of said holder, means connected with said contacts for receiving and amplifying sounds, a locking device located between and connected with said holder and said casing for limiting the movement of said holder to one between said switching position and a position adjacent to said open position, but preventing the removal of said source, said locking device comprising a resilient hook, said holder being round and comprising a lug and a hook carried by said lug and directed inwardly relatively to the roundness of said holder, the last-mentioned hook being adapted to engage behind the first-mentioned hook during a closing movement of said holder, a resilient extension piece carried by said casing and carrying the first-mentioned hook, and a pressure key adapted to engage the first-mentioned hook to move it out of the path of movement of the second-mentioned hook.
Claim 3
Dependent Claim
28 words
An electrical hearing aid according to claim 1, comprising lugs having ends carrying said hooks, the length of said lugs corresponding to the switching movement of said holder.
References Cited (Backward Citations)
US2916538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |