Boots – shoes – and leggings
Patent
1982-02-02
1984-12-25
Wise, Edward J.
Boots, shoes, and leggings
219114, 219110, B23K 1124
Patent
active
044907958
ABSTRACT:
An apparatus for controlling and programming welding guns, constituted by a set of electronic component circuit boards enclosed in a casing provided with a keyboard and a programming and control display unit which are connected electrically together so as to enable various functions to be performed on the static switches of the welding gun to which the apparatus is connected, namely: a first so-called basic function, i.e. without optional circuit boards being inserted, in which the firing angle of the static switches can be varied as a function of the voltage of the welding transformer primary in such a manner as to keep the energy constant, and further functions which can be obtained by using an optional circuit board, including varying the firing angle of the switches as a function of the constancy of the energy dissipated per cycle in the form of heat during welding, with the number of cycles fixed; maintaining the firing angle fixed and varying the number of cycles with automatic stoppage when welding is complete; varying the firing angle to enable the welding current intensity to be kept constant and varying the number of cycles, with automatic stoppage when welding is complete; and varying the firing angle as a function of the constancy of the current delivered per cycle, with the number of cycles fixed.
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Microcomputer Control for Electron Beam Welder, H. Nukumori et al., NEC Research & Development, (Japan), No. 44, Jan. 1977, pp. 1-4.
Comau S.p.A.
Wise Edward J.
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