Patent GB-190806523-A (GB)
Title: Improvements in Type and other Metal Casting Machines.
Filed: 1908-03-24
Granted: 1909-01-21
Abstract: 6523. Marks, E. C. R., [Thompson Type Machine Co.]. March 24. Type.-A type or other metal casting-machine is mounted on a pedestal 1 which may be provided with doors 2 to afford access to the interior. To the top of the pedestal is secured a stand 3 in which is formed a longitudinal channel, which contains the mould and is closed at the top by a plate 4. The mould comprises upper and lower blocks 10, 7 and jet blocks 13, 12, between which slide a body piece 11 and a jet piece 14, Fig. 10, the thickness of which corresponds with the size of type to be cast. The upper mould block 10 and jet block k 13 are guided vertically by tongues and grooves in side plates 8, 9, and may be independently adjusted by means of set-screws. The block 10 has one or more ribs or the like 10<1> on its lower face to form the nicks in the type. The remaining side of the mould is formed by a vertically moving slide 19, Fig. 3. The body piece 11 and jet piece 14 are both connected to a plate 21, Fig. 5, which is connected by a differential screw 31 to a camactuated lever 23, by means of which the type is ejected from the niould. By rotation of the screw 31, the mould cavity is adjusted for different sizes of type. After the casting of a type, the slide 19 is depressed by a cam-actuated lever 40, Fig. 7, acting through a spring 39 to permit the type to pass over its upper edge, the descent of the slide being arrested by a stop carried by an inclined block 44, which is adjusted by means of a set-screw. The matrix 49 consists of a flat rectangular plate, and is carried by a block 53 which is adjusted vertically by means of a set-screw 54 upon a carriage 50, which slides in guides to and from the mould. One edge of the material is engaged by a recessed part of the slide 19, and the opposite edge by a bar 59, Fig. 5, which is adjustably secured to the plate 21. A lug 60 on the bar 59 enters a recess in the plate 21, the space between the lugs 60 and the end of the recess being occupied by a number of plates 61 of varying thickness, against which the lug is clamped by a set-screw 62. The matrix carriage 50 is actuated by a cam-operated lever 69, Fig. 7, acting through a spring 65. The metal-pot is provided with a reservoir 72 and a nozzle 74 in which slides a tubular choker 78. When the choker is in its normal position and the end of the nozzle 74 is closed, the metal can pass from the reservoir 72 through a passage 75 into the pump cylinder 77. When the choker is retracted by a lever 80 so as to open the nozzle, the passage in the choker connects the cylinder 77 with the end of the nozzle, through which the metal passes into the mould. The pump-plunger 89 is depressed by a spring 98 and raised by a cam. The metal-pot is supported by a curved arm 93 pivoted at one end to the top of the pedestal, so that the pot can be swung away from the mould. The pot is supported upon the arm 93 by lugs carrying set-screws, by means of which the pot can be adjusted vertically. The pot is held against the mould by a set-screw 107 acting through a spring so that the end of the screw does not encounter the pot until the parts have fully expanded. The cam shaft 30 of the machine is rotated by a motor 130 mounted within the pedestal. The nozzle 74 of the metal-pot engages a conical aperture in a nozzle-plate 103, Fig. 7, which is adjustable vertically by means of a set-screw 105. The type, after ejection from the mould-by the body piece 11 and jet piece 14, is retained by a rotating cam 116, Fig. 5, which presses it against the upper of two guide-plates. Lateral movement of the type is prevented by a rib on the lower face of the upper guide-plate, which engages the nick in the type. The jet is broken off by a projection on a vertically moving rod which actuates the choker of the metal-pot. The types are pushed forwards by the succeeding ones past a cutter 127, Fig. 5, which trims the feet of the types. A curved projection on the cutter breaks off any remaining part of the jet before the types reach the blades of the cutter. The front edges of the types are trimmed by their passage between suitably-formed trimming knives. The jet block 13 of the mould is cooled by means of water-channels 131, Fig. 10.