KEY-SEAT CUTTERS. The Morton 11"ay Cotter made by the Morton Manufacturing Co., of Muskegon, Mich., is shown in Fig. 1. One of the main features of this machine is the oscillating guide for cross-head, which oscillates from the center line of the main shaft, giving the tool it straight-drawing cut. By means of the adjusting-screw to the left, on front of table. the tool can lie inclined forward or backward from a vertical position, wherehy the machine may be set to cut a key-way, tapering either from the top or bot tom, with the same side down. The stroke of the is ad justed, as is the stroke of a plane•. by adjustable tappets. The guide for work consists of a plate which fits in a groove at the top of the table, and has a projection on each side of the toolbar• which forms a guide to set work to, gauging by bore of pinion.
The machine is male in different sizes. the one shown in the cut being known as the No. 6-24 machine. Its capacity ranges from the smallest key-ways to be cut up to one 21 in. wide and 24 in. long..
The Davis awl is shown in Pig. 2. The famine is made of one casting:, together with the ways. In the machine shown in Fig. 2. the gears nre face, and are all cut gears. The connection-rod is so arranged as to keep chips and dirt from fall ing into the crank-pin. The ways are bored out and ilia lop of frame faced. The stud-pins to the clamp are provided with washers, and so arranged that the el:impel/II be placed between them at any hen4.ht and will not drop clown. .1 simple arrangement is also furnished to give any desired draft to key-seat required, also any depth. This machine will cut to 1-in. key-seats.
The Erie _Machine, made by the blurt on :Machine Co., of Erie, Pa., is shown in Fig. 3. Thu arbor is hollow, and has within it it steel liar tinned the guide-lair, and is mov able np and down by menus of a screw at each end. It earries within it a tool-bar, which supports two tools of the width desired for the key-seat, and is connected to the driving-car riage by means of a removable pin. It is driven hack and forth through the guide-bar,
cutting in both directions, and fed down the desired depth and taper by the screws at the ends. The driving apparatus consists of two parallel screws, 21 in. in diameter, pitch, 3 threads. They are set 0 in. from center to center, and run in opposite directions; between them is an open-sided nut, which carries with it a carriage to which the cutting-bar is attached.
The Gloat made by the Giant Key-Seater Co., of Saginaw, Mich., is shown in Fig. 4. The machine consists of an upright column, supporting on trunnions a table in which are T-slots for securing the work to be operated upon. Inside the column is a vertical guide, on which slides the crosshead, having on its face a for centering the round tool-bar, which is clamped. The cross-head receives its motion through a rack, which meshes in a spur-gear of wider face than the rack. The gear is keyed on a horizontal shrift, to which is also keyed the worm-gear inside of gear-casing, the shaft extending through the casing, and having secured to it a disk, which has two circular T-slots turned in its face, in each of which is a tappet which reverse the. motion by shifting the open and crossed belts running from the counter-shaft, as shown. The tappet, which acts at the end of the slow or cutting stroke, is placed in the outer of the two circular T-slots in the disk. By moving the tappets in the slots, the stroke of the cutter can be varied as desired, without stopping the machine. To provide for forward movement of cutter in the work, the vertical guide is arranged to slide in ways at the top and bottom, being moved forward and back by wedges, which are operated by the feed-lever shown at the left of the machine. As the cutter, cutter-bar, and guide are advanced, the rack on cross-head slides in the cogs of the spur-gear with which it meshes; the pinion having a wider face than the rack, as stated above.
Kiln: see Brick-Making Machines; also, Furnaces, Roasting.