Patent US1738767A successfully refreshed from Google Patents.
Patent US3531468A successfully refreshed from Google Patents.
US6704424B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hearing aid with audible alarm
Assignee: Etymotic Research Inc
•
Filing: 2002-06-20
•
Granted: 2004-03-09
•
Expires: 2022-06-20
Abstract
Abstract A low battery detection circuit is disclosed for detecting low battery voltages in hearing aids and other battery operated devices. The low battery detection circuit operates reliably on a small amount of current, which does not significantly increase overall battery drain. An output signal is generated whose amplitude and frequency increase as battery voltage decreases below a predetermined level. The circuit's minimal number of components and output signal characteristics make it particularly applicable as a low battery early warning device for hearing aid devices.
Inventors
- 👤 Mead C. Killion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:52
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/30; H04R25/305; H04R25/60; H04R2225/00; H04R2225/33; H04R2460/00; H04R2460/03
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
116 words
A hearing aid comprising: a hearing aid housing; a hearing aid circuit comprising a microphone for receiving audio and for generating therefrom audio signals and an amplifier for amplifying the audio signals generated by said microphone; a battery connected to supply power to said hearing aid circuit; an alarm system mounted with the hearing aid housing for generating an audio alarm signal representative of an audible alarm in response to the voltage output of said battery falling below a predetermined threshold value, said audio alarm signal being directly connected for amplification by said amplifier such that said audible alarm is transmitted into the ear canal of the user and is thus heard only by the user.
Claim 2
Dependent Claim
116 words
A hearing aid comprising: a hearing aid housing; a hearing aid circuit comprising a microphone for receiving audio and for generating therefrom audio signals and an amplifier for amplifying the audio signals generated by said microphone; a battery connected to supply power to said hearing aid circuit; an alarm system mounted with the hearing aid housing for generating an audio alarm signal representative of an audible alarm in response to the voltage output of said battery falling below a predetermined threshold value, said audio alarm signal being directly connected for amplification by said amplifier such that said audible alarm is transmitted into the ear canal of the user and is thus heard only by the user.
Claim 3
Dependent Claim
38 words
A hearing aid as claimed in claim 1 wherein a signal component of said audio alarm signal changes as the voltage of said battery changes, said signal component being selected from the group consisting of amplitude and frequency.
Claim 4
Dependent Claim
26 words
A hearing aid as claimed in claim 2 wherein both the frequency and amplitude of said audio signal increase as the voltage of said battery decreases.
Claim 5
Dependent Claim
25 words
A hearing aid as claimed in claim 1 and further comprising means for disabling said alarm system to inhibit generation of said audio alarm signal.
Claim 6
Dependent Claim
21 words
A hearing aid as claimed in claim 4 and further comprising an on/off switch for controlling power supplied from said battery.
Claim 7
Dependent Claim
15 words
A hearing aid as claimed in claim 4 wherein said means for disabling is automatic.
Claim 8
Dependent Claim
17 words
A hearing aid as claimed in claim 5 wherein said means for disabling comprises said on/off switch.
Claim 9
Dependent Claim
24 words
A hearing aid as claimed in claim 1 and further comprising a timing circuit for enabling and disabling generation of said audio alarm signal.
Claim 10
Dependent Claim
163 words
A hearing aid comprising: a hearing aid housing; a microphone for receiving audio and for generating therefrom audio signals; an amplifier for amplifying input signals, said amplifier having a first input connected to receive the audio signals generated by said microphone, a second input, and an output supplying amplified signals corresponding to signals received at said first and second inputs; an earphone connected to receive said signals from said output of said amplifier and for converting said signals into sound energy; a battery connected to supply power to said amplifier; an alarm system mounted with the hearing aid housing for generating an audio alarm signal representative of an audible alarm in response to the voltage output of said battery falling below a predetermined threshold value, said audio alarm signal being directly connected for receipt by said second input of said amplifier such that said audible alarm is transmitted into the ear canal of the user and is thus heard only by the user.
Claim 11
Dependent Claim
163 words
A hearing aid comprising: a hearing aid housing; a microphone for receiving audio and for generating therefrom audio signals; an amplifier for amplifying input signals, said amplifier having a first input connected to receive the audio signals generated by said microphone, a second input, and an output supplying amplified signals corresponding to signals received at said first and second inputs; an earphone connected to receive said signals from said output of said amplifier and for converting said signals into sound energy; a battery connected to supply power to said amplifier; an alarm system mounted with the hearing aid housing for generating an audio alarm signal representative of an audible alarm in response to the voltage output of said battery falling below a predetermined threshold value, said audio alarm signal being directly connected for receipt by said second input of said amplifier such that said audible alarm is transmitted into the ear canal of the user and is thus heard only by the user.
Claim 12
Dependent Claim
25 words
A hearing aid as claimed in claim 9 and further comprising means for disabling said alarm system to inhibit generation of said audio alarm signal.
Claim 13
Dependent Claim
21 words
A hearing aid as claimed in claim 10 and further comprising an on/off switch for controlling power supplied from said battery.
Claim 14
Dependent Claim
15 words
A hearing aid as claimed in claim 10 wherein said means for disabling is automatic.
Claim 15
Dependent Claim
15 words
A hearing aid as claimed in claim 11 wherein said means for disabling is automatic.
Claim 16
Dependent Claim
27 words
A hearing aid as claimed in claim 9 wherein both the frequency and amplitude of said audio alarm signal increase as the voltage of said battery decreases.
Claim 17
Dependent Claim
25 words
A hearing aid as claimed in claim 9 and further comprising a timing circuit for periodically enabling and disabling generation of said audio alarm signal.
References Cited (Backward Citations)
US4049930A
Cited
US4284944A
Cited
US4712093A
Cited
US4777474A
Cited
US4910795A
Cited
US6320969B1
Cited
US6453051B1
Cited
US5343532A
Cited
US5420930A
Cited
US5680112A
Cited
US5666331A
Cited
US6067006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-03-09 | 2007-09-08 | 2008-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-03-09 | 2011-09-08 | 2012-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-03-09 | 2015-09-08 | 2016-03-09 | $7700.00 | Window Closed / Lapsed |