 Heat exchanger performance monitor |
| The present inventon provides a monitoring system which has equivalent performance to prior art ... |
|
| Cable collet termination |
| The disclosed electrical connector terminating the shield conductor of a coaxial cable comprises ... |
|
| Hydraulic control valve with manual override |
| In accordance with one aspect of the invention, a manual override handle is mounted for pivoting ... |
|
| Bulkhead connector |
| AND ADVANTAGES The subject invention is directed toward a bulkhead connector assembly for ... |
|
| Streamer cable |
| OF A PREFERRED EMBODIMENT In the following detailed desription and corresponding figures, like ... |
|
| Method of attaching guideways to a machine tool bed |
| OF THE INVENTION FIGS. 1, 2 and 3 illustrate views of a fixture for precisely orienting guideways ... |
|
| Continuous compounding and mixing apparatus |
| OF THE PREFERRED EMBODIMENT Now an exemplary embodiment of this invention will be described with ... |
|
| Manure spreader |
| The present invention relates generally to a liquid and semi-liquid type manure spreader, and more ... |
|
| Drop jet apparatus |
| An object of the invention is to provide a drop jet apparatus such as an ink-jet printing apparatus ... |
|
| Drip feed device for irrigation purposes |
| I claim: 1. A drip feed device for irrigation purposes in which a body (25) has a cylindrical wall (... |
|
|
Method and apparatus for TIG welding
| Details |
Inventors: Stava, Elliott K.;
Assignee: The Lincoln Electric Company (Brecksville, OH)
Primary Examiner: Shaw; Clifford C.
Assistant Examiner:
Attorney, Agent or Firm:
A method and apparatus for TIG welding by passing an alternating current between a non-consumable electrode and a workpiece to form an arc, which apparatus comprises a single reactor, passing a direct current from a direct current power supply through a first portion of the reactor and in a negative direction from the workpiece to the electrode for creating a heating cycle, switchably disconnecting the direct current power supply from the circuit and immediately connecting the second portion of the reactor in a positive direction across the electrode and workpiece for creating a short cleaning cycle for cleaning the workpiece preparatory to the next heating cycle. These cycles are continued to create a TIG welding process. |
|
DETAILED DESCRIPTION Having thus defined the invention, the following is claimed: 1.
A device, driven by a direct current power supply having a positive output and negative output, for causing an alternating current to flow between the workpiece member and electrode member in an arc welding system, said device comprising: an inductive reactor having a tap, first and second opposite ends and a common core, means for connecting said tap to one of said members, means for connecting the other of said members to one of said power supply outputs, a first power switch, means for connecting said first power switch between the first end of said reactor and one of said power supply outputs having a first polarity, a second power switch, means for connecting said second power switch between the second end of said reactor and the one of said power supply outputs having a second polarity, said switches each having a conductive state allowing flow of current through said reactor in a like direction from said positive output to said negative output, and a control means for said first and second switches, said control means including signal means for shifting between a first condition providing energy from said power supply to said reactor with said first switch in its conductive state and said second switch in its non-conductive state to pass current through said reactor between said first end and said tap to magnetize said core and a second condition supplying energy by said reactor with said second switch in its conductive state and said first switch in its non-conductive state to cause current flow through said reactor between said tap and said second end of said reactor as said core is demagnetized.
2.
A device as defined in claim 1 wherein said first condition has a first duration and said second condition has a second duration and said signal means includes timing means for changing at least one of said first and second durations.
3.
A device as defined in claim 2 wherein said timing means includes means for maintaining the sum of said first and second durations generally equal
|
| Related patents |
|
|
Method and apparatus for GMAW welding
Having thus defined the invention, the following is claimed: 1. A method of welding along a pass line on a steel workpiece, said method comprising the steps of: (a) ...
|
|
|
Tandem electrode welder and method of welding with two electrodes
Having thus defined the invention, the following is claimed: 1. An electric arc welding apparatus comprising at least a first consumable electrode and a second ...
|
|
|
Apparatus for and method of automatically assembling an automobile body structure
What is claimed is: 1. A method of assembling an automobile body structure, comprising the steps of: providing an automobile body floor panel and a pair of automobile ...
|
|
|
Method for diffusion welding under isostatic pressure
According to the invention structural components are joined to each other by diffusion welding involving the combination of the following steps. A metallurgical layer is ...
|
|
|
Installation for automatic assembly of components and, in particular, components of motor vehicle bodies
We claim: 1. Installation for assembling various constitute or subassembly parts, said installation including: at least one programmable welding robot; a transfer line ...
|
|
|
Pneumatic hammer
In accordance with one aspect of the present invention, a pneumatic hammer is provided and comprises a casing having a neck extending therefrom and a cylinder received ...
|
|
|
Remote control cable
The present invention achieves an inextensible conducting cable which exhibits improved characteristics relative to the previous cables, particularly with respect to the ...
|
|
|
Low loss buoyant coaxial cable
The low loss buoyant coaxial cable provides a great improvement in attenuation over previously employed buoyant coaxial cables thereby permitting the transfer of higher ...
|
|
|
Remote control cable for transmitting electrical signals and process and apparatus for production thereof
I claim: 1. A remote control cable suitable for controlling bodies moving at high speed comprising, in combination: (a) a central element consisting of a textile element;...
|
|
|
Anchoring braided metal sheath on ignition wire
As explained in my parent application, I sheathe generally known ignition wire 10 with shiny braided metallic sheath 11 that improves the appearance, protects the wire ...
|
|
|
Gutter-related 
