Accession Number : AD0164030
Title : Welding Machine.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : Dargis,Algimantas A.
Report Date : 01 SEP 1970
Pagination or Media Count : 5
Abstract : The patent describes a resistance welding machine which includes a power source connected to a variable pulse control and a variable impedance device interconnecting the pulse control to a pair of electrodes in series relationship. The pulse control comprises a one-shot multivibrator with a variable resistance device for establishing a desired pulse width. The variable impedance device comprises a transistor switching board which includes parallel connected resistors with series connected transistor switches associated with each resistor. A mechanical switch selectively interconnects the pulse control with various ones of the transistor switches for establishing the desired impedance and thus controlling the amplitude of the welding pulse.
Descriptors : (*MACHINES, WELDING), (*PATENTS, MACHINES), POWER SUPPLIES, SWITCHING CIRCUITS
Subject Categories : Machinery and Tools
Distribution Statement : APPROVED FOR PUBLIC RELEASE