Electric heating – Metal heating – By arc
Patent
1987-10-14
1989-01-31
Shaw, Clifford C.
Electric heating
Metal heating
By arc
219136, 2191372, B23K 910
Patent
active
048017809
ABSTRACT:
A dielectric cover is detachably coupled, in enveloping fashion, about the motor casing portion of an electric hand drill of pistol form with a front portion extending beyond the drill shaft projecting from the front end of the drill casing. The cover acts as a torque tube to support a right angle drive reduction gear mechanism which terminates in a drive wheel rotating about an axis perpendicular to the drill shaft axis and within a friction drive mechanism, completed by spring biased idler wheel pressing sidewise against the drive wheel. Metal blocks mounted to the cover connect to one side of a DC source and mount a wire guide for guiding a thin wire first electrode into contact with and between the drive wheel and the idler wheel. The wire electrode which is frictionally pulled from a spool borne by the cover feeds through a conductor tube of an electrode nozzle assembly. The conductor tube receives an inert shielding gas which flows about the thin wire first electrode and the arc. The variable speed drill uses the trigger mechanism to control wire electrode feed speed and thus the amperage of the weld arc, with workpiece functioning as the second electrode. Owing to the inherently stable arc as derived from storage batteries, arc and drive power sources require no stabilizing interlock and may thus be entirely separate or identical, as convenience may dictate, without affecting either arc or drive either benficially or adversely.
REFERENCES:
patent: 2909646 (1959-10-01), Russell
patent: 3575573 (1971-04-01), McCollister
patent: 4508954 (1985-04-01), Kroll
patent: 4531045 (1985-07-01), Kemp
patent: 4590357 (1986-05-01), Winkler
Omniverse Research, Inc.
Shaw Clifford C.
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