Jackie W Stringer

US Patent:

44910185, Jan 1, 1985

Filed:

Jun 17, 1983

Appl. No.:

6/505209

Inventors:

Jackie D. Stringer - Houston TX
Eugene L. Dobesh - Houston TX

Assignee:

F. H. Maloney Company - Houston TX

International Classification:

H01H 3500
H01H 3600

US Classification:

73432R

Abstract:

The present invention includes a ferrous conduit mounted over an aperture in the pipeline, launch tube, or receiver through which the pigs pass. A non-magnetic sensing rod is reciprocally mounted within the conduit with the rod extending through the aperture and into the pipeline. That end of the non-magnetic sensing rod extending into the pipeline has attached thereto a head with a lower rounded surface for engaging the pigs. A non-magnetic end cap is secured to the upper end of the conduit and a non-magnetic magnet holder with a magnet disposed therein are mounted on the upper end of the rod. A magnetically operated switch is mounted adjacent the non-magnetic cap. The conduit shields the magnetic field of the magnet from the switch until a pig is detected. Upon the engagement of the head with a pig, the magnet on the upper end of the sensing rod moves above the conduit inside the non-magnetic cap and sends a magnetic flux to the magnetically operated switch. The switch is activated and sends a signal to a remote location indicating the presence of a pig.

Address:

2013 Peppermill Rd, Houston, TX 77080

Phone:

7134611628

VIN:

1FTFW1EF2CFA19775

Make:

FORD

Model:

F-150

Year:

2012