US4837835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speaker system for motor vehicles with an alarm device
Assignee: Pioneer Corp
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Filing: 1988-03-31
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Granted: 1989-06-06
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Expires: 2008-03-31
Abstract
Abstract A speaker system for a motor vehicle includes a detection device which detects a change in the state of fixing of the speaker system on a part of the vehicle body by means of a fixing device. When the change in the fixing state is detected, an alarm is generated by an alarm device connected to the detection device, so that loosening of the fixing device such as a holding screw is surely prevented.
Inventors
- 👤 Fumio Murayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:19
CPC Classifications
B; B60; B60R; B60R11/00; B60R11/02; B60R11/0217; H; H04; H04R; H04R1/00; H04R1/02; H04R1/025; B60R2011/0001; B60R2011/0003; B60R2011/0019; B60R2011/0024; B60R2011/0042; B60R2011/0049; B60R2011/005; B60R2011/0052; B60R2011/0096; B60R2011/0098
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
111 words
A speaker system for fixing a speaker to the vehicle body of a motor vehicle comprising: a speaker unit; a cabinet holding said speaker unit; a fixing means for fixing said cabinet on a part of said vehicle body of said motor vehicle; a detection switch having a contact element in connection with said fixing means, and a switch contact, said contact element being separated from said switch contact when said switch contact is shifted by a change in a state of fixing by said fixing means; and an alarming means electrically connected to said detecting switch, for generating an alarm when said contact element and said switch contact are separated.
Claim 2
Dependent Claim
111 words
A speaker system for fixing a speaker to the vehicle body of a motor vehicle comprising: a speaker unit; a cabinet holding said speaker unit; a fixing means for fixing said cabinet on a part of said vehicle body of said motor vehicle; a detection switch having a contact element in connection with said fixing means, and a switch contact, said contact element being separated from said switch contact when said switch contact is shifted by a change in a state of fixing by said fixing means; and an alarming means electrically connected to said detecting switch, for generating an alarm when said contact element and said switch contact are separated.
Claim 3
Dependent Claim
52 words
A speaker system as set forth in clai 1, wherein said fixing means comprise a holding screw provided betweens aid cabinet and said part of said vehicle body, and wherein said switch contact is associated with said holding screw, whose opening and closing are controlled by a position of said holding screw.
Claim 4
Dependent Claim
52 words
A speaker system as set forth in clai 1, wherein said fixing means comprise a holding screw provided betweens aid cabinet and said part of said vehicle body, and wherein said switch contact is associated with said holding screw, whose opening and closing are controlled by a position of said holding screw.
Claim 5
Dependent Claim
27 words
A speaker system as set forth in claim 2, wherein said holding screw is operative as a part of an electric signal path of said detection switch.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |