EP0104898A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Gearbox indicator switch
Assignee: AB Electronic Components Ltd
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Filing: 1983-09-22
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Granted: —
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Expires: 2003-09-22
Abstract
Abstract In order to provide a reliable position indicator for a gear control, particularly for automatic transmission motor vehicles, use is made of reed switches (2). These may be mounted in a sealed housing and operable by a magnet (1) from outside the housing. The magnet (1) is movable by and with the gear control. The reed switches (2) may be mounted on a printed circuit board (3) and flux concentrators (4) are preferably provided between adjacent reed switches (2) to shield them until the magnet (1) is closely adjacent.
Inventors
- 👤 Derek Morris Embrey
- 👤 Stuart Frederick Webb
- 👤 Ian James Bickford
- 👤 Argus Francis Caxton Doss-Desouza
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 22:12
CPC Classifications
F; F16; F16H; F16H59/00; F16H59/68; F16H59/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
A gear selection mechanism including a gearbox indicator switch device, characterised in that the switch device includes a magnet (1, 9) movable with a manually operable gear selection control, a series of reed switches (2, 10) selectively operable by the magnet (1, 9) at one of a series of preset positions of the gear selector control, and circuit components (11) connecting the reed switches (2, 10) to provide indicating and/or interlock functions.
Claim 2
Dependent Claim
72 words
A gear selection mechanism including a gearbox indicator switch device, characterised in that the switch device includes a magnet (1, 9) movable with a manually operable gear selection control, a series of reed switches (2, 10) selectively operable by the magnet (1, 9) at one of a series of preset positions of the gear selector control, and circuit components (11) connecting the reed switches (2, 10) to provide indicating and/or interlock functions.
Claim 3
Dependent Claim
26 words
A mechanism according to claim 1, characterised in that flux concentrators (4, 5) are provided between adjacent reed switches (2, 10) to provide substantial magnetic shielding.
Claim 4
Dependent Claim
31 words
A mechanism according to claim 1 or 2, characterised in that the reed switches (2, 10) are mounted on one or more printed circuit boards (3, 6) with other circuit elements.
Claim 5
Dependent Claim
39 words
A mechanism according to claim 1, 2 or 3, characterised in that the reed switches (2, 10) are mounted in a single line for cooperation with. a magnet (1, 9) moving along a line with an automatic transmission control.
Claim 6
Dependent Claim
42 words
A mechanism according to claim 1, 2, 3 or 4, characterised in that the reed switches (10) are mounted in a sealed container (21, 23, 24) having at least one non-magnetic face (23) separating the reed switches (10) from the magnet (9).
References Cited (Backward Citations)
DE2018277A1
Cited
FR2125629A5
Cited
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