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Industrial Machinery Corporation has invented a certain new and useful Improvement in Machines for Threading Bolts and Pipes, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same This invention relates to machines of the character that are used for Bolt Threading Machine
The main object of our present invention is to provide means for increasing the efficiency and speed of operation of a pipe or bolt threading machine of the type in which an operating medium such as a hydraulic medium or a medium under pressure is used for causing the work to be engaged by the threading mechanism and for separating the threading work without speeding up the machine or increasing the speed of the drive shaft, and without changing the chasers of the threading mechanism.
At this end we have devised a Pipe threading machine in which the supply of the operating medium that affects the movement of one main element of the machine toward the other main element; for example, the carriage toward the threading mechanism is automatically out off after the article being. threaded has been engaged by the threading mechanism and the supply of the operating medium that affects the return of the "carriage to starting position is automatically turned on at the completion of the threading operation so as to cause the carriage to return to starting position, and is cut off automatically when the carriage reaches its starting position.
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