GB2078006A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Electric contact switches
Assignee: Individual
•
Filing: 1981-04-16
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Granted: —
•
Expires: 2001-04-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 12:45
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/02; H01H3/14; H01H3/141; H01H3/142
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
An electric contact device for operating and controlling electric units, such as an electric motor, said device comprising a base member carrying at 50 least one electric conductor extending along a surface of said base member and defining a first contact member of the device, and an electrically conducting cover layer covering each conductor on said base member and defining a second contact 55 member of the device, said first and second contact members being without electrical connection in the normal, passive state of the device, and said device being CHARACTERIZED by each electric conductor being recessed in a corresponding elongated inde-60 ntation defined in said surface of the base member, and by said cover layer being resiliently deformable about confronting edges defining said indentation, so as to be depressed into said indentation to establish electrical connection with said conductor 65 therein, thereby closing a current flow path through the device.
Claim 2
Dependent Claim
151 words
An electric contact device for operating and controlling electric units, such as an electric motor, said device comprising a base member carrying at 50 least one electric conductor extending along a surface of said base member and defining a first contact member of the device, and an electrically conducting cover layer covering each conductor on said base member and defining a second contact 55 member of the device, said first and second contact members being without electrical connection in the normal, passive state of the device, and said device being CHARACTERIZED by each electric conductor being recessed in a corresponding elongated inde-60 ntation defined in said surface of the base member, and by said cover layer being resiliently deformable about confronting edges defining said indentation, so as to be depressed into said indentation to establish electrical connection with said conductor 65 therein, thereby closing a current flow path through the device.
Claim 3
Dependent Claim
35 words
The device of claim 1, CHARACTERIZED in that the base member surface is a cylindrical surface in which each elongated indentation is defined as a 70 helical groove having a helically wound conductor inserted therein.
Claim 4
Dependent Claim
39 words
The device of claim 1 CHARACTERIZED in that at least one end of each helically wound conductor extends into the interior of the base member for 75 establishing electrical connection with an electric unit, in particular an electric motor.
Claim 5
Dependent Claim
42 words
The device of claim 2 or 3, CHARACTERIZED in * that said cover layer is a tubular sleeve made of a compressible, resilient material of the type having * 80 an electrical conductivity that varies with the compression ratio of the material.
Claim 6
Independent Claim
87 words
A method of manufacturing an electric contact device for operating and controlling electric units such as an electric motor, CHARACTERIZED by 85 comprising the steps of providing a base member of a generally rigid material and having a cylindrical surface area extending along at least a portion thereof, providing at least one helical groove in said 90 cylindrical surface area, applying an electric conductor in each groove, and applying a tubular, electrically conducting and resiliently deformable sleeve over said cylindrical surface area, thereby covering each groove. 95
Claim 7
Independent Claim
87 words
A method of manufacturing an electric contact device for operating and controlling electric units such as an electric motor, CHARACTERIZED by 85 comprising the steps of providing a base member of a generally rigid material and having a cylindrical surface area extending along at least a portion thereof, providing at least one helical groove in said 90 cylindrical surface area, applying an electric conductor in each groove, and applying a tubular, electrically conducting and resiliently deformable sleeve over said cylindrical surface area, thereby covering each groove. 95
Claim 8
Dependent Claim
40 words
The method of claim 5, CHARACTERIZED in that an insulated wire is used as said conductor, and in that the central conductor of said wire is exposed to the exterior by removing insulating material from said helically wound wire. 100
Claim 9
Dependent Claim
17 words
A tubular or rod shaped handpiece comprising a contact device as defined in claim 2,3 or 4.
Claim 10
Dependent Claim
20 words
A contact device substantially as herein described with reference to any one of the Figures of the accompanying drawing. 105
Claim 11
Dependent Claim
20 words
A contact device substantially as herein described with reference to any one of the Figures of the accompanying drawing. 105
Claim 12
Dependent Claim
41 words
A method according to claim 5, substantially as herein described. Printed for Her Majesty's Stationery Office by Croydon Printing Company Limited, Croydon, Surrey. 1981. Published by The Patent Office, 25 Southampton Buildings, London, WC2A 1AY, from which copies may be obtained.
References Cited (Backward Citations)
No citation records indexed.
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