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    • 10. 发明专利
    • Improvements in Reciprocating Metal-cutting Machines.
    • GB189708783A
    • 1897-05-08
    • GB189708783D
    • 1897-04-06
    • GORDON ALEXANDER
    • GORDON ALEXANDER
    • 8783. Gordon, A. April 6. Gearing, driving; feed-motions; toolholders.-Reciprocating metal-cutting machines such as planing, slotting, and shaping machines are provided with a compressed-air engine, controlled by the motions of the machine, for reversing the machine, giving the feed, and moving the tool clear of the work during the idle stroke. Fig. 1 shows a side view of a planing-machine with an air cylinder 20, the piston-rod 22 of which is connected by the link 19 to a shaft 17 which operates the clutch for connecting the slow-speed and fast-speed pulleys to the driving-shaft situated at the other side of the machine. The piston-rod 22 is also secured to a rack 24 for putting on the feed through the segment 23, link 11, and rack 9. The valve 25 of the cylinder 20 is actuated by the dogs 7, 8 on the table 2 acting on the tumbler 5 which is connected by the link 28 to a lever 27 pivoted to a block on the piston-rod 22 and operating the valve through links 29, 26. The machine can be brought to rest by means of the handle 6. For tilting the tool-box 35, a pin 42 on the lever 27 acts on a three-way cock 38 admitting air through pipes 39, 41 behind the piston 37 of a cylinder 36. On the reversal for cutting, the three-way cock puts the pipe 41 in communication with the exhaust 40.