EP0467822A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electrical device and electrical transmitter-receiver particularly useful as a CT2 cordless telephone
Assignee: Galtronics Ltd
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Filing: 1991-07-16
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Granted: —
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Expires: 2011-07-16
Abstract
Abstract An electrical transmitter-receiver, particularly useful as a CT2 cordless telephone, includes a quarter wavelength antenna rod carried by the housing, and a quarter wavelength antenna coil carried by one end of the antenna rod. The antenna rod is movably mounted through an opening in its housing to a retracted position wherein substantially only the antenna coil is disposed externally of the housing, or to an extended position wherein substantially the complete antenna rod and the antenna coil are disposed externally of the housing. When the antenna rod is in its retracted position an electrical switch connects the antenna coil to the electrical circuit, and when the antenna rod is in its extended position an electrical switch connects the antenna rod to the electrical circuit.
Inventors
- 👤 Michael Elliott
- 👤 Matti Martiskainen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 01:21
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H01Q1/244
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
122 words
An electrical device, comprising: a housing enclosing electrical circuitry of the electrical device; an antenna rod carried by said housing; an antenna coil carried by one end of said antenna rod; said antenna rod being movably mounted through an opening in the housing to a retracted position wherein substantially only the antenna coil is disposed externally of the housing, or to an extended position wherein substantially the complete antenna rod and the antenna coil are disposed externally of the housing; and electrical switching means effective when the antenna rod is in its retracted position to connect the antenna coil to said electrical circuit, and when the antenna rod is in its extended position to connect the antenna rod to said electrical circuit.
Claim 2
Dependent Claim
106 words
The device according to Claim 1, wherein said electrical switching means comprises: a fixed electrical connector fixed to said housing; a first movable electrical connector electrically-connected to said antenna coil and carried by said antenna rod so as to be engageable by said fixed electrical connector when the antenna rod is in its retracted position to connect the antenna coil to said electrical circuit; and a second movable electrical connector connected to and carried by said antenna rod so as to be engageable by said fixed electrical connector when the antenna rod is in its extended position to connect the antenna rod to said electrical circuit.
Claim 3
Dependent Claim
32 words
The device according to Claim 2, wherein said fixed electrical connector is located adjacent said opening in the housing through which the antenna rod is movable to its retracted and extended positions.
Claim 4
Dependent Claim
25 words
The device according to Claim 3, wherein said first movable electrical connector is located at the juncture of the antenna coil with the antenna rod.
Claim 5
Dependent Claim
28 words
The device according to Claim 4, wherein said second movable electrical connector is located at the end of the antenna rod opposite to that carrying the antenna coil.
Claim 6
Dependent Claim
42 words
The device according to Claim 5, wherein said opposite end of the antenna rod carries a shoulder engageable with a stop fixed within the housing adjacent said opening for limiting the movement of the antenna rod when moved to its extended position.
Claim 7
Dependent Claim
39 words
The device according to Claim 6, wherein said housing opening is circumscribed by an insulating bushing engageable with a stop carried by said antenna coil for limiting the movement of the antenna rod when moved to its retracted position.
Claim 8
Independent Claim
22 words
The device according to any one of Claims 1-7, wherein said antenna rod and said antenna coil are both of quarter wavelength.
Claim 9
Independent Claim
29 words
The device according to any one of Claims 1-8, wherein said antenna coil is embedded within a dielectric medium, and said antenna rod is enclosed within a dielectric sleeve.
Claim 10
Independent Claim
23 words
The device according to any one of Claims 1-9, wherein said electrical circuitry is a transmitter-receiver, particularly useful as a CT2 cordless telephone.
References Cited (Backward Citations)
No citation records indexed.
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