CUTTING TORCH

1393912 Cutting by fusion UNITED AIRCRAFT CORP 26 July 1972 [13 Sept 1971 15 Sept 1971] 35018/72 Heading B3V [Also in Divisions F4 and C5] The gas stream of a metal cutting torch is formed by reacting a solid fuel 13 with oxygen to form an oxygen-rich central portion surrounded by a fuel-rich outer...

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Bibliographic Details
Main Authors THOMPSON, JAMES C, HOLZMAN, ALLEN L
Format Patent
LanguageEnglish
Published 26.03.1974
Subjects
BLASTING
BURNERS
CLADDING OR PLATING BY SOLDERING OR WELDING
COMBUSTION APPARATUS
COMBUSTION PROCESSES
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
HEATING
LIGHTING
MACHINE TOOLS
MECHANICAL ENGINEERING
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SOLDERING OR UNSOLDERING
TRANSPORTING
WEAPONS
WELDING
WORKING BY LASER BEAM
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Summary:1393912 Cutting by fusion UNITED AIRCRAFT CORP 26 July 1972 [13 Sept 1971 15 Sept 1971] 35018/72 Heading B3V [Also in Divisions F4 and C5] The gas stream of a metal cutting torch is formed by reacting a solid fuel 13 with oxygen to form an oxygen-rich central portion surrounded by a fuel-rich outer portion. The torch includes a cartridge 2 releasably held by a latch 5 against a biasing spring in a tubular holder 3 which has an insulated portion or a handle 4 with a protective shield 51. The holder 3 is provided with dimples 27 to space the cartridge 2 from its inner wall. The cartridge 2 comprises a casing 8 enclosing insulators 11, 12, a hollow solid fuel element 13, e.g. polymethylmethacrylate, and an oxygen generating material 14 formed of two solid segments (14a, 14b) (Fig. 3, not shown), of a composition comprising chlorate or perchlorate and iron or magnesium compacted with fibreglass or asbestos, e.g. 86À5% NaClO 3 , 12À5% Fe and 1% fibreglass. Ignitable sections 18 are mounted between the segments (14a, 14b) which are held together by a glue formed of igniter material (19). In use, a cap 23 is removed from a metal nozzle 9 of the torch and the oxygen generating material 14 ignited by an igniter 15 which is actuated by a pull cord 24. The gas stream produced by the reaction of the fuel 13 with the oxygen may have a temperature of 1760‹ C., a burn time of 3 minutes and at least a sonic velocity. The speed of ignition of the fuel 13 may be increased by an ignitable material 18a. An increase in gas pressure within the cartridge 2 is prevented by a pressure relief valve 10. The hot spent cartridge 2 is prevented from rolling along a surface on which it is placed by an arm 25.
Bibliography:Application Number: CA19720148845