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Title: |
1880 Article-D. Saunders' Sons, Pipe Threading & Cutting Machine |
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Source: |
American Machinist, 22 May 1880, pg. 7 |
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Insert Date: |
7/11/2015 7:27:31 PM |
Machine for Screwing and Cutting-off Gas Pipe
The cut on this page represents an improved machine for cutting screw threads on gas pipe and cutting pipe to particular lengths. It cuts off pipe from ¼ to 2 inches inclusive, with patent gripping chuck for holding the pipe while it revolves, also with patent expanding dies. The advantages claimed for this machine over the ordinary pipe-threading machines in use are:
1. The belting and gearing have been arranged with the view of obtaining suitable power and speed for the various sizes of pipe, so that smaller sizes will revolve the same number of feet per minute as the larger.
2. Besides the variations of speed obtained by the cone pulleys, two pairs of gear wheels, which are very readily changed on the end of frame, will give the required speed and power for the sizes to be cut.
3. The die and head to which it is attached are so constructed that pipe may be alternately threaded and cut off without removing the die from the machine.
4. The advantages claimed for these dies are: They are more easily adjusted and can be opened instantly by the lever, as soon as the thread is cut on as far as required, and the pipe taken out without reversing the machine, thereby saving time with no possibility of stripping the thread, as is frequently the case with solid dies; they also keep the size accurately.
The chuck is arranged whereby the gripping jaws are quickly and powerfully operated, without stopping the rotating motion of the chuck, thus saving the time in stopping; also the screwing and unscrewing of the gripping jaws, as is the case with the ordinary pipe machines. The arrangement of the gripping jaws is such they can be quickly altered to hold any of the various sizes of pipe from to 2 inches.
Its construction is claimed to be one of the strongest combinations possible in a chuck. The cut shows a partial sectional view of the chuck. It comprises a novel combination of the following parts: Blocks C, arranged to slide radially in the head of the chuck A, and radially adjustable by means of screws turned by wrench, gripping jaws B, capable of radial movement upon the face of the just-described sliding block C. A system of actuating levers D, is fulcrumed in the sliding block C, and connected with the sliding gripping jaws B, to give movement thereto, an actuating block being arranged to slide upon the spindle of the chuck, and constructed with a tapering surface arranged to operate the fulcrumed levers D, by the sliding movement of the tapering block, and an operating forked lever being arranged to give such sliding movement to said taper or incline block.
This machine is adapted to all the various kinds of pipe cutting with the least loss of time.
The manufacturers are D. Saunders' Sons, Yonkers, N. Y. |
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