US4977614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wristband with loop antenna
Assignee: Motorola Solutions Inc
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Filing: 1989-10-23
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Granted: 1990-12-11
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Expires: 2009-10-23
Abstract
Abstract An apparatus for adjusting the length of a single segment loop antenna while automatically compensating for the antenna so as to maintain a substantially constant resonant frequency thereof.
Inventors
- 👤 Robert Kurcbart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:36
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/08; H04B1/086; H04B1/088; A; A44; A44C; A44C5/00; A44C5/18; A44C5/22; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/273
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
72 words
An apparatus comprising: a radio receiver disposed in a housing having a band suitable for attaching to an object; an antenna having a substantially constant resonant frequency said antenna comprising a gear rack positioned contiguous to said band; and adjusting means for adjusting the length of said antenna, said adjusting means being positioned contiguous to said apparatus and to said antenna and comprising a spur gear wheel mechanism for engaging said antenna.
Claim 2
Independent Claim
72 words
An apparatus comprising: a radio receiver disposed in a housing having a band suitable for attaching to an object; an antenna having a substantially constant resonant frequency said antenna comprising a gear rack positioned contiguous to said band; and adjusting means for adjusting the length of said antenna, said adjusting means being positioned contiguous to said apparatus and to said antenna and comprising a spur gear wheel mechanism for engaging said antenna.
Claim 3
Dependent Claim
42 words
The apparatus according to claim 1 wherein said band comprises first and second ends, said first end comprising a tab for preventing said band from disengaging said spur gear wheel mechanism and said second end of said band coupled to said receiver.
Claim 4
Dependent Claim
47 words
The apparatus according to claim 1 wherein said band comprises first and second surfaces, said first surface comprising a slot substantially along the length of said band for slideably engaging said first end of said band, said second surface comprising said antenna positioned contiguous to said band.
Claim 5
Dependent Claim
86 words
A selective call receiver comprising: receiver means disposed in a housing having a band suitable for attaching to an object; antenna means disposed in said band and coupled to said receiver means, said antenna means comprises a gear rack; and adjustment means for adjusting said band so as to fasten said receiver means to a wrist, said antenna means having a substantially constant resonant frequency, said adjustment means comprises a spur gear wheel mechanism for engaging said antenna means, thereby forming a closed loop electrical circuit.
Claim 6
Dependent Claim
86 words
A selective call receiver comprising: receiver means disposed in a housing having a band suitable for attaching to an object; antenna means disposed in said band and coupled to said receiver means, said antenna means comprises a gear rack; and adjustment means for adjusting said band so as to fasten said receiver means to a wrist, said antenna means having a substantially constant resonant frequency, said adjustment means comprises a spur gear wheel mechanism for engaging said antenna means, thereby forming a closed loop electrical circuit.
Claim 7
Dependent Claim
20 words
The selective call receiver according to claim 4 wherein said receiver means comprises a slot for slideably engaging said band.
Claim 8
Dependent Claim
31 words
The selective call receiver according to claim 4 wherein said band comprises first and second ends, said first end comprising a tab and said second end coupled to said receiver means.
Claim 9
Dependent Claim
50 words
The selective call receiver according to claim 6 wherein said band comprises first and second surfaces, said first surface comprising a slot substantially along the length of said band for slideably engaging said first end of said band, said second surface comprising said antenna means positioned contiguous to said band.
Claim 10
Independent Claim
80 words
An apparatus comprising: a radio receiver disposed in a housing having a band suitable for attaching to an object; an antenna having a substantially constant resonant frequency, said antenna positioned contiguous to said band; and manually rotatable adjustment means for adjusting the length of said antenna; and for maintaining said substantially constant resonant frequency of said antenna, said manually rotatable adjustment means being positioned contiguous to said apparatus and to said antenna and comprising a mechanism for engaging said antenna.
Claim 11
Independent Claim
80 words
An apparatus comprising: a radio receiver disposed in a housing having a band suitable for attaching to an object; an antenna having a substantially constant resonant frequency, said antenna positioned contiguous to said band; and manually rotatable adjustment means for adjusting the length of said antenna; and for maintaining said substantially constant resonant frequency of said antenna, said manually rotatable adjustment means being positioned contiguous to said apparatus and to said antenna and comprising a mechanism for engaging said antenna.
Claim 12
Dependent Claim
13 words
The apparatus according to claim 8 wherein said antenna comprises a gear rack.
Claim 13
Dependent Claim
14 words
The apparatus according to claim 8 wherein said mechanism comprises a spur gear wheel.
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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) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |