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| Number | Title | Issue Date |
| 7234938 | Milling/grinding machine for the manufacture of dental-medical workpieces The invention relates to a milling/grinding machine for the manufacture of dental-medical or dental-technical workpieces, having a workpiece receiver (3) and a tool (7) which can be moved, with respect to a workpiece (1) arranged in the workpiec... | 06/26/2007 |
| 7041934 | Micro-welder A micro-welder, by which a superfine wire such as a lead wire can be welded on a desired position of a parent material with a minimum welding area, including: a power source having a capacitor-charging device for generating a predetermined voltage and a voltage cont... | 05/09/2006 |
| 6376794 | Percussive arc welding apparatus A percussive arc welding apparatus includes a generally cylindrical actuator body having front and rear end portions and defining an internal recess. The front end of the body includes an opening. A solenoid assembly is provided in the rear end portion in... | 04/23/2002 |
| 6175097 | Ceramic-coated metal guide pin A guide pin comprising a metal core and a generally smooth, non-porous insulative ceramic layer disposed on the metal core. An intermediate layer comprising titanium-carbonitride (TiCN) may be disposed on the metal core, thereby improving bonding of the c... | 01/16/2001 |
| 5105060 | Automatic feed system for parts to be welded This feed system comprises: feed device for feeding a part to be welded, which can be inserted into a hole of a work, to the vicinity of an electrode of a welder; chuck for removably chucking the part fed by the feed means; first transfer device for trans... | 04/14/1992 |
| 5001322 | Manual percussive welding apparatus A manual percussive welding apparatus which has a fixed electrode and a movable electrode is provided with a means in the form of a stop that comes into contact with the moveable electrode assembly to prevent further downward movement of the movable elect... | 03/19/1991 |
| 4873412 | Automatic feed apparatus, for fusion welding machine, and electrode holder therefor An automatic feed apparatus is provided for a fusion welding machine, in which metal components are welded together. The apparatus has an electrode holder for holding a pin and having a clamping lever for clamping the pin to an electrode. A feeding device... | 10/10/1989 |
| 4789768 | Projection welder A projection welder including a guide pin adapted to be withdrawn, when welding is performed, into an electrode for performing welding. The guide pin is formed with a tapering surface portion which is positioned, when the guide pin is inserted in a thread... | 12/06/1988 |
| 4752666 | Manual percussive welding apparatus A fusion welder has a fixed electrode and mounted above the fixed electrode is a movable electrode. The movable electrode is normally spring loaded to be urged toward the fixed electrode and a latch means holds the movable electrode in a locked position. ... | 06/21/1988 |
| 4728768 | Percussion weld monitoring The quality of a percussion weld is sensed by measuring and analyzing certain features of the weld current signature. Instantaneous current is measured by a Hall sensor and permits isolation of the welder from the monitoring system. Weld quality is strong... | 03/01/1988 |
| 4700041 | Method and apparatus for projection welding Two metal plates 1a, 1b are projection welded together using a truncated conical projection 12 on a first one of the plates having a spherical end surface. The plates are pressed together through the projection, and a welding current pulse is applied whic... | 10/13/1987 |
| 4620079 | Stud welding device A stud welding gun has a forepart which includes the delivery end of an automatic stud-feeder and is secured to the housing by a quick releasable joint so as to be readily replaceable by another forepart supplying a stud of different size. The gun include... | 10/28/1986 |
| 4609806 | Method and apparatus for determining weld quality in percussion welding The quality of welds produced during a percussion welding process are determined in real time by sensing the vibrational impulse signals produced during the percussion welding process, filtering the impulse signal to select a frequency band containing fre... | 09/02/1986 |
| 4465917 | Stud welder with magnetic follow-up A stud welder is provided with a pair of magnetic coils and a compression spring. One of the coils provides the lift to separate electrode held parts and start an arc therebetween. The other coil and the compression spring provide fast follow-up force dri... | 08/14/1984 |
| 4417120 | Percussive arc welding A method and apparatus for improved percussive arc welding is disclosed. In this technique a test arc of a voltage no greater than the initiating voltage of the percussive arc welding is first applied across the pieces to be welded. The welding cycle is t... | 11/22/1983 |
| 4339652 | Power supply for percussion welding This percussion welding power supply supplies welding energy through an arc between two work pieces that are forced together during or immediately following arcing. The power supply comprises a welding transformer having a primary winding and a secondary ... | 07/13/1982 |
| 4215262 | Automatic percussion welding apparatus with stud feed A percussion welder includes a single acting main cylinder having a ram extending through both ends of the cylinder mounting a spring loaded chuck on one end of the ram and an adjustable return spring on its other end. An automated version includes a hollow ra... | 07/29/1980 |
| 4162388 | Apparatus and method for submerged percussion welding Submerged percussion welding is disclosed wherein the parts to be welded are in intimate contact with a liquid, such as water, during explosion and vaporization of the arc starter therebetween. In preferred form, one part is mounted to a stationary bottom... | 07/24/1979 |
| 4038743 | Terminating and splicing electrical conductors An individual metallic, electrical conductor is terminated by heating one end thereof to form an enlarged molten mass, followed by cooling and subsequent shaping of the mass to form a terminal. Multiple conductors are spliced by heating adjacent ends ther... | 08/02/1977 |
