Patent US5448251A successfully refreshed from Google Patents.
US5448251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic telescopic antenna mechanism
Assignee: AT&T Inc
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Filing: 1993-09-23
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Granted: 1995-09-05
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Expires: 2013-09-23
Abstract
Abstract A radiotelephone handset having a tubular telescoping antenna and a slide-open mouthpiece is provided with a mechanical coupling between the mouthpiece and the antenna for automatically extending the antenna when the mouthpiece is opened.
Inventors
- 👤 Irwin Gerszberg
- 👤 Norman P. Graule
- 👤 Eugene T. Kendig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:55
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/0202; H04M1/0206; H04M1/0208; H04M1/0214; H04M1/0216; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/10; H04M1/0235
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
In a radiotelephone handset comprising a body; a telescopic antenna comprising a tubular antenna channel fastened to the body and having a first end and a second end; and an antenna plunger slidably installed within the first end of the antenna channel; and a mouthpiece including a microphone, the mouthpiece being slidably fastened to the body, means responsive to a user's act of sliding the mouthpiece for extending the antenna plunger, comprising: a pinion rotatably mounted in the body; a first rack on a face of the mouthpiece adjacent to the body and engaged with the pinion; and a second rack engaged with the pinion and fastened to the antenna plunger.
Claim 2
Dependent Claim
111 words
In a radiotelephone handset comprising a body; a telescopic antenna comprising a tubular antenna channel fastened to the body and having a first end and a second end; and an antenna plunger slidably installed within the first end of the antenna channel; and a mouthpiece including a microphone, the mouthpiece being slidably fastened to the body, means responsive to a user's act of sliding the mouthpiece for extending the antenna plunger, comprising: a pinion rotatably mounted in the body; a first rack on a face of the mouthpiece adjacent to the body and engaged with the pinion; and a second rack engaged with the pinion and fastened to the antenna plunger.
Claim 3
Dependent Claim
52 words
The radiotelephone handset of claim 1, wherein further: the second rack is flexible, the second rack enters the second end of the antenna channel, and the second end of the antenna channel is proximate to the pinion, whereby the second rack is confined by the antenna channel to prevent it from buckling.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-09-04 | 1999-03-06 | 1999-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-04 | 2003-03-06 | 2003-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-04 | 2007-03-06 | 2007-09-05 | $7700.00 | Window Closed / Lapsed |