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