Magnetic detection apparatus with sensors mounted on channel or angle cantilever support

• US 5,136,245 A
• Filed: 06/04/1991
• Issued: 08/04/1992
• Est. Priority Date: 05/25/1990
• Status: Expired due to Term

• Current Assignee: Schonstedt Instrument Co. LLC (SPX Corporation)
• Original Assignee: Schonstedt Instrument Company
• Inventors: Schonstedt, Erick O.
• Primary Examiner(s): Strecker, Gerard R.
• Application Number:
  US07/709,982
• Time in Patent Office: 427 Days
• Field of Search: 324/67, 324/149, 324/156, 324/253-255, 324/258, 324/260, 324/262, 324/326-329, 324/345, 336/65-68, 336/90, 336/92, 336/199, 336/208, 174/52.1, 174/59, 174/60, 33/355 R, 33/361, 33/363 R
• US Class Current: 324/345
• CPC Class Codes: G01V 3/15 specially adapted for use during transport, e.g. by a person, vehicle or boat

Abstract

A magnetic detection apparatus (magnetic locator) comprises a housing constituted by a first integral molded plastic unit and a second integral molded plastic unit that are joined. The first unit has a tube with a plate at one end thereof transverse to the length of the tube, the plate having an opening through which a magnetic sensor assembly is inserted into the tube. The second unit has a cover open at one end and having a tubular handle at the opposite end, by which the user may grasp the apparatus. Attachment of the cover to the plate closes the open end of the cover to provide a casing. Magnetic sensors are mounted on a channel or angle structural member that is rigidly attached to the chassis of an electrical unit mounted in the casing. Sound from a loudspeaker mounted on the chassis is transmitted through the handle to the exterior of the apparatus. The chassis also supports a meter that is visible through an opening in an end wall of the cover adjacent to the handle.

Claims

1. Magnetic detection apparatus comprising a magnetic sensor assembly including a pair of spaced magnetic sensors mounted longitudinally in alignment on an elongated support, said support comprising a single channel or angle structural member entirely open at one side and having longitudinal walls all engaging and embracing said sensors, said apparatus further comprising an electrical unit including a chassis, said support being attached to said chassis and extending rigidly therefrom as a cantilever, said electrical unit comprising means cooperable with said sensors to detect magnetic fields.