Reversible polarity accessory cable
AssigneeOperating Technical Electronics, Inc.
InventorJames U. Dernehl
Life of this patent
Estimating the term…
Abstract
An adapter for supplying D.C. current from a lighter receptacle to a remote accessory is formed by a plug inserted into the receptacle which has a reversible interconnection with a cable connected to the remote accessory. The end of the cable with the reversible interconnector is marked to visually display the electrical polarity of current supplied to the remote accessory.
Claims20
An adapter for supplying D.C. current from a conventional D.C. lighter receptacle to a remote accessory comprising:
- (a) a plug having a first positive terminal and a first negative terminal adapted to mate with the respective positive and negative terminals of a conventional D.C. lighter receptacle and having an output receptacle with a second positive terminal and a second negative terminal;
- (b) a D.C. cable having first and second ends;
- (c) a reversible connector on the first end of said cable having first and second substantially oppositely disposed surfaces and first and second contacts adapted to mate with said second positive terminal and said second negative terminal in said output receptacle in two alternative orientations which change the polarity of electrical connection;
- and
- (d) a display on at least one of said first and second surfaces visually indicating the polarity of the interconnection between said reversible connector and said output receptacle.
An adapter for supplying D.C. current from a conventional D.C. lighter receptacle to a remote accessory comprising:
- (a) a plug with a first end having a central probe and an outer ground coaxially aligned therewith adapted to mate electrically and mechanically with a D.C. lighter receptacle and a second end having substantially geometrically identical positive and negative output terminals;
- (b) a D.C. cable having a reversible connector with a pair of contacts adapted to mate with said output terminals in a first position or a second position when said connector is axially rotated 180.degree. from the first position;
- and
- (c) a display on said connector visually indicating the orientation of said connector.
An adapter for supplying D.C. current from a conventional D.C. lighter receptacle to a remote accessory comprising:
- (a) a plug with a first end having a central probe and an outer ground coaxially aligned therewith adapted to mate electrically and mechanically with a D.C. lighter receptacle;
- (b) a D.C. cable extending from said plug and having a reversible connector on the end thereof remote from said plug which has a pair of contacts adapted to selectively mate with a remote accessory in either a first position or a second position adapted to change the polarity of electrical connection;
- and
- (c) a display on said reversible connector visually indicating the polarity of said electrical connection.
Dependencies are inferred from the claim text.