System for matching a new hole in an overlying member with an ex

Details System for matching a new hole in an overlying member with an ex System for matching a new hole in an overlying member with an ex

1993-06-14

1995-07-11

Snow, Walter E.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324226, G01R 1900, G01R 3300

Patent

active

054324343

ABSTRACT:
A system is provided for matching a new hole in an overlying member with an existing hole in an underlying member. With a magnet placed in the existing hole, an indicator device having an internal cavity, an outer boundary, and a ferrous ball freely movable within the internal cavity is slid across the surface of the overlying member and in engagement therewith. When the ferrous ball overlies the magnet, a position on the overlying member aligned with the existing hole in the underlying member is thereby located. Thereafter, the indicator means is removed from the overlying member and replaced by a drill guide means. The drill guide means is used to locate a drill to cut a hole through the overlying member coincident with the existing hole in the underlying member.

REFERENCES:
patent: 2318191 (1943-05-01), Bloomfield
patent: 2346773 (1944-04-01), McBride et al.
patent: 2600857 (1952-06-01), De La Mater
patent: 2834938 (1958-05-01), Cunningham
patent: 2844977 (1958-07-01), Morse
patent: 2933679 (1960-04-01), Bray
patent: 3722360 (1973-03-01), Blakey et al.
patent: 3793738 (1974-02-01), Blakey
patent: 4384396 (1983-05-01), Smolik
patent: 4388890 (1983-06-01), Wester et al.
patent: 4741534 (1988-05-01), Rogahn

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