Metallurgical apparatus – Means for cutting solid metal with heat – e.g. – blowpipes
Patent
1975-11-28
1977-06-21
Lake, Roy
Metallurgical apparatus
Means for cutting solid metal with heat, e.g., blowpipes
2393975, B23K 702
Patent
active
040307107
ABSTRACT:
A cutting torch that obviates the tendency to bow because of unequal heating of tubes therewithin and, consequently, keeps its tip at the same relative angle with respect to the material being cut, characterized by the usual tip, head, body, barrel, oxygen and fuel flow control valves and cutting oxygen valve and having the improvement of having both the pre-heat tube and the cutting oxygen tube assembly sealingly connected to the head and only one of the pre-heat tube and the cutting oxygen tube assembly sealingly and rigidly connected to the body and the other thereof slidably engaging the body so as to permit body movement longitudinally thereof to compensate for differential expansion between the slowly cooled pre-heat tube with its slow flow of oxygen and fuel and the more rapidly cooled cutting oxygen tube assembly with its periodic rapid flow of cutting oxygen. Also disclosed are specific structural details depict preferred embodiments, including a preferred type of mixing tube structure to eliminate sustained flashback burning.
REFERENCES:
patent: 1262351 (1918-04-01), Jones et al.
patent: 1276893 (1918-08-01), Fischer
patent: 2198342 (1940-04-01), Jacobsson et al.
patent: 2263655 (1941-11-01), Stettner
patent: 2459881 (1949-01-01), Jacobsson
patent: 2655992 (1953-10-01), LeRenard
patent: 3078913 (1963-02-01), Anthes
patent: 3228612 (1966-01-01), Graham et al.
patent: 3612738 (1971-10-01), Jones et al.
Bell Paul A.
Fails James C.
Lake Roy
Victor Equipment Company
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