Illustrated catalogue and general description of improved machine tools for working metal by Sellers William & co

Author:Sellers, William, & co. [from old catalog]
Language: eng
Format: epub
Tags: Machine-tools, Machinery
Publisher: Philadephia, Levytype company
Published: 1899-03-25T05:00:00+00:00

Plate No. 147.

PLATE-PLANING MACHINE— For Plates 22 Feet Long. Showing End-Planing Attachment. [See specification under Plate No. 146.]

We are prepared to build these machines of various lengths and capacities, and make them with clamping screws, as shown in these plates, or with independent removable screw-jacks, as preferred.

[78 Wm. Sellers & Co., Incorporated, Philadelphia, Pa.

Punching and Shearing Machines.

OUR punching and shearing machines include two types, known as crank and lever machines, to designate the manner of driving. In the first type the vertical slide is driven directly by a crank shaft, and power is received through spur gearing from a pinion-shaft parallel thereto and in line with the machine, while in the second type, the vertical slide is driven indirectly through the intervention of a heavy steel lever by an eccentric shaft across the machine. This eccentric shaft is driven through spur gearing by a pinion-shaft parallel thereto, and at right angles to the position assumed in the first type of machine. Each type has its own peculiar advantages, among which the position of the machine, with reference to the line shafting, will be at once apparent; but for durability and economy of power in heavy service we decidedly prefer and recommend the lever machine, which we believe is demonstrably superior in design.

Our lever punches are usually connected with the operating eccentric positively and do not depend upon the weight of the lever to withdraw the punch. The sliding head, which is unusually long and well guided, may be counter-balanced and moved freely by hand when disconnected from the moving lever, and it is engaged or disengaged by our patent toggle-joint-stop which may be thrown in at any speed without danger and without shock. The toggle is straightened to transmit pressure, and if this be not done it simply '' knuckles " and the operator takes the next opportunity to engage it. Clutches and sliding " gag blocks " are liable to partial engagement, and battered or broken edges often result if not more serious accidents. No other stop-motion operates so easily and so safely in large machines. It may be operated at will, allowed to act continuously or automatically disengaged at the completion of each stroke. The slide can be adjusted so that the clearance under the punch may be varied to suit the thickness of the plate or to suit the length of the punch. Our punching and shearing machines are easily convertable, that is they may be arranged with both shearing and punching devices and quickly changed from one to the other.

Our lever machines may be arranged to drive by belts from the line shaft, by independent engine or by electric motors attached to the bearings.

The various machines in the following illustrations are typical, but they by no means represent all of the modifications we have been called upon to make to meet special requirements.

We are prepared to build machines of any class with more or less overreach and more or less clear height between upper and lower jaws.

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