Electric heating – Metal heating – Cutting or disintegrating
Patent
1979-06-14
1981-11-10
Reynolds, B. A.
Electric heating
Metal heating
Cutting or disintegrating
219 68, 219 69R, 21913742, 219138, 239DIG7, B23K 916, B23P 100, B23K 928
Patent
active
043000339
ABSTRACT:
A reduced operating noise nozzle for a cutting device using at least one electrode and an electric arc to cut material of a workpiece, comprises, a nose end piece disposed around the electrode which has an outer surface tapered from an outer relatively wide diameter end inwardly toward a smaller diameter end which faces the workpiece to be cut. Compressed air is directed in a substantially annular flow path along the tapered surface of the nose piece from the wide diameter end toward the smaller diameter end thereof. Noise which would have emanated from the nozzle, especially when the material of the workpiece which is melted by the arc is blown away to effect the cutting operation, will be greatly reduced.
REFERENCES:
patent: 3238349 (1966-03-01), Anderson et al.
patent: 3270179 (1966-08-01), Russell
patent: 3575568 (1971-03-01), Tateno
patent: 3624339 (1971-11-01), Jenkins
patent: 3833787 (1974-09-01), Couch, Jr.
patent: 3937915 (1976-02-01), Matsuo et al.
patent: 3984054 (1976-10-01), Frochaux
patent: 4166209 (1979-08-01), Rieppel et al.
patent: 4195780 (1980-04-01), Inglis
Kennedy Warren C.
McDonald John F.
Scarton Henry A.
George Keith E.
Rensselaer Polytechnic Institute
Reynolds B. A.
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