Magnetic electrical connectors

• US 4,211,456 A
• Filed: 01/31/1979
• Issued: 07/08/1980
• Est. Priority Date: 01/31/1979
• Status: Expired due to Term

• Current Assignee: Schick Laboratories Incorporated
• Original Assignee: Schick Laboratories Incorporated
• Inventors: Sears, Hartley M.
• Primary Examiner(s): Lake, Roy
• Assistant Examiner(s): Jones, DeWalden W.
• Application Number:
  US06/008,060
• Time in Patent Office: 524 Days
• Field of Search: 339/12 AU, 339/7, 339/10
• US Class Current: 439/39
• CPC Class Codes: H01R 13/6205 Two-part coupling devices held in engagement by a magnet

Abstract

A male and female electrical connector are held together via a permanent magnet inside the female connector. The male connector is generally spherical and of ferrometallic construction so as to be attracted by the permanent magnet. A number of male connectors may be attached to a multi-conductor cable, each male connector being electrically connected to only one of the conductors. In this manner, a multitude of electrical connections can be made concurrently. The invention is especially suitable for use in medical applications requiring an electrical attachment to be made to a patient which may be easily disconnected by the patient when he so desires.

Claims

1. A device for electrically coupling a first and second portion of an electrical circuit, comprising:

a cylindrical housing, having a axial end and a cylinderical cavity in said axial end, said housing being electrically conductive and electrically coupled to said first circuit portion;

a magnet of size to fit within said cavity a spaced distance below said housing axial face, and so positioned; and

a sphere of magnetically attracted and electrically conductive material, electrically coupled to said second circuit portion, with diameter greater than the diameter of said cavity, and, when positioned to contact said housing axial face around the lip of said cavity, magnetically retained against said lip by said magnet, thereby forming an electrical coupling between said first and second circuit portions.

2. A device according to claim 1 wherein said magnet is cylindrical and positioned inside said cavity to bring an axial end of said magnet a spaced distance below the plane of said housing axial face.

3. A device according to claim 1 wherein said cavity extends the length of said housing, thereby configuring said housing as a cylindrical tube, wherein said magnet is electrically conductive and electrically coupled to said housing, and wherein said magnet is electrically connected to said second circuit portion, thereby electrically coupling said housing to said second circuit portion.

4. A device according to claim 1 wherein said magnet is a samarium-cobolt alloy.

5. A device according to claim 1 wherein said sphere is about 5/16" in diameter, and wherein said housing is about 5/16" in outside diameter with a cavity of about 1/4" in diameter.

6. A device according to claim 1 wherein a living organism comprises said second circuit portion and wherein said housing comes into physical contact with said organism to form said electrical coupling.