A portable welder includes a welder housing. The housing has front and rear vertical end surfaces and left and right side surfaces. The housing further has a horizontal top surface extending forward from the rear surface. An inclined surface faces upward and forward and extends from a front end of the top surface to a top end of the front surface. A front post, equidistant from the side surfaces, extends upward from the inclined surface. A rear post, equidistant from the side surfaces, extends u...

One of two small workpieces that are to be welded together is slidingly mounted in a fixed workholder and the other is firmly gripped by a movable workholder. To carry out an operating cycle, the movable workholder is reciprocated by two lobes of a cam that makes one revolution when momentarily connected to a relatively large mass that rotates at constant velocity. Initially the first slidable workpiece is placed at random at a position that is advanced slightly from the position desired for the...

One of two small workpieces that are to be welded together is slidingly mounted in a fixed workholder and the other is firmly gripped by a movable workholder. To carry out an operating cycle, the movable workholder is reciprocated by two lobes of a cam that makes on revolution when momentarily connected to a relatively large mass that rotates at constant velocity. Initially the first slidable workpiece is placed at random at a position that is advanced slightly from the position desired for the ...

An apparatus for friction welding a first element to a second element includes a forge assembly having a table defining a platform, a crank, a forge link and a reaction link disposed oppositely of the forge link relative to the platform. Various construction details are disclosed that provide a friction welder that minimizes bending in the forge and motion planes and enhances repeatability of the welds performed. In a specific embodiment, the friction welder may be used in a method to form integ...

An arc welder comprising: a rectifier circuit 2 which rectifies an alternating current 1 to a direct current; an inverter circuit 3; a transformer 4; a second rectifier circuit 5 which rectifies an output of the transformer 4 to a direct current; and a first reactor 6 which is connected to the second rectifier circuit 5. The arc welder further has a current circuit 10 which is connected in parallel to the second rectifier circuit 5 with a reactance that is larger than the reactance of the first ...

A platform for use in loading and supporting a gas cylinder onto a movable welder undercarriage which platform comprises a lower cylinder support pate with a rear end, a front end and a normal level cylinder supporting position; means for mounting the platform on the rear of the undercarriage to pivot about a transverse axis in a first pivot direction to a cylinder loading position with the rear end of the support plate tilted downward against the floor and in a second pivot direction with the s...

A resistance welding apparatus utilizes a force-equalizing means including three universal ball joints to provide an equal force distribution to two welding electrodes.

A hot wedge, automatic seam welder is disclosed. The welder is comprised of a chassis having a base plate, a motor housing and a support arm extending from the motor housing. An S-shaped guide for guiding opposing sheets of material is between the base plate and the motor housing. Disposed downstream from the motor housing, depending from the support arm, is vertically-movable suspension for a driven upper pressure roller which is occludable with a driven lower pressure roller on the base plate....

An apparatus for friction welding a first element to a second element includes a forge assembly having a table defining a platform, a crank, a forge link and a reaction link disposed oppositely of the forge link relative to the platform. Various construction details are disclosed that provide a friction welder that minimizes bending in the forge and motion planes and enhances repeatability of the welds performed. In a specific embodiment, the friction welder may be used in a method to form integ...

A plastic welder that is attachable to a source of heated air for the purpose of welding crystaline thermoplastic materials comprising a tip, a hook, a nose, an eyelet vent, a body, a parabolic vent, a deflector, a flue entrance, and a base. Heated air is blown through the plastic welder with some of the heated air escaping through the parabolic vent which preheats the material to be welded with the balance of the heated air being deflected into the flue entrance. The balance of the heated air f...