Electric heating – Metal heating – For bonding with pressure
Patent
1987-05-14
1988-11-15
Shaw, Clifford C.
Electric heating
Metal heating
For bonding with pressure
219113, B23K 1126
Patent
active
047851597
ABSTRACT:
A precision electric welding device is used for welding dental crowns and bridges in the mouth. The dental elements to be welded comprise dentally suitable metals, especially titanium and titanium alloys. The device comprises a welding gun and a base unit provided with a direct current voltage source and a storage device for storing welding sequences. Each welding sequence defines the energy requirements for successive pulses in a particular welding operation. The base unit generates a series of controlled voltage potentials for each operation, and the welding gun is responsive thereto for performing the welding operations. The portable welding system is of the capacity-discharge, contact-resistance type, and performs welding with high-precision endo-oral metals by generating controlled sequences of electrical energy pulses (1) selected from a permanent storage library, or (2) manually controlled from a local console, or (3) externally controlled from an external computer. The permanent storage library can store a plurality of (e.g., up to 256) three-pulse welding sequences written to it in the "manual" mode of operation.
REFERENCES:
patent: 4104724 (1978-08-01), Dix et al.
patent: 4456809 (1984-06-01), Jones et al.
patent: 4681999 (1987-07-01), Hruska
Byrne John J.
Shaw Clifford C.
Titanweld B.V.
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