Miniature fault indicator

Details Miniature fault indicator Miniature fault indicator

2007-03-06

2007-03-06

Crosland, Donnie L. (Department: 2612)

Communications: electrical

Visual indication

C340S003220, C340S547000, C340S691700, C335S001000, C335S002000, C335S205000, C116S204000

Reexamination Certificate

active

11083905

ABSTRACT:
A rugged, miniature, waterproof and lightweight magnetic latching indicator with an auxiliary switch. The indicator includes a solenoid, an elongated plunger mounted in the solenoid, the plunger supporting a first permanent magnet with the magnet being surrounded by specially dimensioned non-magnetic spacers. The plunger and solenoid are packaged in a non-magnetic housing with a solenoid locator, a top cap and a bottom cap maintaining the indicator in a compact waterproof package. An indicator button is mounted to the plunger and a reed switch biasing spring and second permanent magnet are located between the bottom cap and the solenoid. The plunger moves from a retracted latching position to an extended position. In the retracted position, the indicator button is retracted and not readily visible and the second permanent magnet maintains the reed switch in a closed position. In the extended position, the indicator button is readily visible and the second permanent magnet is spaced from the reed switch causing the reed switch and any external circuitry connected in series with the reed switch to open.

REFERENCES:
patent: 2373587 (1945-04-01), Martin-Hurst
patent: 3605047 (1971-09-01), Kasahara
patent: 3671900 (1972-06-01), Loughran, Jr.
patent: 4709654 (1987-12-01), Smith
patent: 6305313 (2001-10-01), Cunkelman et al.
patent: 6357384 (2002-03-01), Laymon et al.

Affiliated with

Also associated with

Rating

Miniature fault indicator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Miniature fault indicator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Miniature fault indicator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3772721