Process of forming openings

Details Process of forming openings Process of forming openings

1985-11-27

1987-07-21

Whitehead, Harold D.

Cutting by use of rotating axially moving tool

Processes

Bit detachable

408 12, 408710, 29407, 204 1T, 204400, H02G 112

Patent

active

046814892

ABSTRACT:
For locating steel reinforcing members in construction materials, a galvanic cell is formed between an electrode and the reinforcing members by placing the electrode in electrically conducting contact with the construction material. When drilling an opening into the construction material using a hand-held drilling device and the drilling bit in the device contacts a reinforcing member, the potential difference between the electrode and the drill bit can be utilized as a signal for controlling the operation of the drilling device.

REFERENCES:
patent: 2747154 (1956-05-01), Abrams
patent: 4255241 (1981-03-01), Kroon et al.

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