Accession Number : ADD002910

Title :   Coated Magnetically Biased Reed Switch.

Descriptive Note : Patent,


Personal Author(s) : Seeley,Robert L

Report Date : 29 Jun 1976

Pagination or Media Count : 4

Abstract : The patent relates to a small reed switch having a glass tubularly shaped envelope containing a pair of reed contacts which is modified to ensure its being biased to either an open or a closed position. A donut-shaped piece of a rubber-bonded, barium-ferrite, magnetic material is circumferentially mounted on the reed switch at a position where its magnetic field influences the contacts to an open position or a closed position. Thusly arranged, an actuating magnet, having a sufficient field at a single pre-established distance from the contacts, actuates the switch from all radial directions from the switch. Potting the modified switch in an epoxy resin further ensures a greater reliability and makes it ideal for implantations in laboratory animals.

Descriptors :   *Electric switches, *Patents, Proximity devices, Actuators, Magnets, Bioengineering, Implantation, Potting, Epoxy resins

Subject Categories : Electrical and Electronic Equipment
      Biomedical Instrumentation and Bioengineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE