摘要:
A plasma arc cutting torch embodying an electrode having a swirl tube and a nozzle thereabout, a spring mechanism bearing on the swirl tube and nozzle being caused by them to complete a circuit, the circuit not becoming completed in the absence of one of or both the swirl tube and nozzle.
摘要:
An electric arc welding machine with a tiltable demountable welding head embodying a snap lock hinge structure providing for a tilted positioning of the welding head or for the ready removal of the tilting head for welding purposes remote from the base supporting structure.
摘要:
In the sight opening of the face shield of a welding helmet, a protective lens overlying a filter lens and having a light impervious coating about its edge portion blocking the passage of light rays through its edge portion and through the clearance about the lenses within the sight opening and thus eliminating the use of a gasket or other sealant about the lens first mentioned or within or about the sight opening.
摘要:
This invention relates to the modification of a moving magnet type of a direct current reading meter wherein by the addition of an electro-magnetic coil, the permanent magnet of the meter is influenced by the magnetic field of the coil with respect to the current flow to provide a reading to indicate full scale values of a much lower current value than that of the basic movement of the meter.
摘要:
To support a patient in an obstetric chair positioned for the convenience of the physician, the patient-receiving portion of the chair is mounted for changes in elevation and for different attitudes and includes channel-like thigh supports which confine the thighs of the patient and a recessed seat portion for supporting the buttocks of the patient. The backrest is vertical to the seat portion and has a central section extending slightly forward with two recessed portions and an overhanging back portion to further confine the patient between curved side portions. The channel-like thigh supports may be adjusted in angle with respect to each other and the seat portion is cut away to permit access to the perineum.
摘要:
This invention is in connection with a sliding shunt type of welder wherein the improvement consists of the shunt being moveable relative to the core of the welder by the use of a single hand of the operator, the shunt being carried by a pair of channel members, the channel members being moveable by a single handle which by axial movement positions the shunt in a desired operating position and which by rotation operates a simple latching mechanism.
摘要:
In connection with a plasma arc metal cutting apparatus, an electrode having vertical movement within a nozzle, said nozzle having a gas supply passing therethrough, an over-center spring mechanism holding the electrode in one operating position, a switch in one position energizing the electrode in engagement with the nozzle and said switch in a second position actuating the spring mechanism to snap the electrode to a position away from engagement with the nozzle and thus draw an arc between the electrode and the nozzle, the arc comprising a plasma flame to cut materials.