Patent ID: 6457246
Filing Date: 2002-10-01
Classification: E21D,G01C,H01R,Y10S

Abstract:
A survey apparatus comprising:an alignment means for projecting an alignment beam from a laser module; said alignment means comprising a laser housing assembly to house said laser module and a switch housing assembly releasably engageable with said laser housing assembly, said switch housing assembly including a first connection portion and a source of electrical energy; and a mounting means for releasably receiving said alignment means, said mounting means including a second connection portion; said second connection portion being complimentary to said first connection portion and completing a disconnectible electrical circuit to provide electrical energy from said source to said laser module; wherein said electrical circuit is completed and said alignment beam is projected from said alignment means to conduct a survey when said alignment means is received within said mounting means, and said electrical circuit is broken and said alignment means is incapable of independent operation when said alignment means is removed from said mounting means.