Patent GB-274378-A (GB)
Title: Improvements in or relating to machines for making tiles, slabs, blocks or other like objects of plastic material
IPC: B28B5/00
Filed: 1927-02-28
Abstract: 274,378. Ryves, R. A., and Williams, M. E. Feb. 28, 1927. Stream-cutting machines; endless-chain machines.-Means for operating devices for shaping, cutting into slabs or blocks, or punching holes in, a stream of material such as clay, cement soap, &c. consists. as shown in Fig. 1, of a fixed cam 9 on the machine frame 10, a traveller 3 moving synchronously with the stream, and a shifting member 1 movably mounted on the traveller and adapted to be carried into intermittent engagement with the fixed cam 9 and to be thereby shifted in order to engage with parts on the shaping &c. devices so as to operate such devices. The member 1 is pivotally mounted on the traveller 3, and has two mutually inclined arms 4, between which and the traveller are disposed centering springs 5. As long as the part 8 of the member 1 engages the cam 9, a claw 6 engages a projection 12<1> on the frame 12 of the shaping &c. device. Springs 5 or a reversing cam return the member 1 to normal position when disengaged from the cam 9. A tail piece 7, provided on the member 1, may engage between the cam 9 and a guide bar for the purpose of steadying the action. The claw 6 may be in the form of a spring, or it may be mounted on a pin and be spring controlled. For providing vertical movements of the shaping devices, the members 1 are mounted on horizontal pivots, and counterweights may be used in place of the springs 5. The devices may be arranged to receive both vertical and horizontal movement, in which case two sets of members 1 and cams 9 would be required, one set being vertically mounted and the other horizontally mounted. In the case of a cutting operation, the knife is held in a holder 12, centred by springs, which tend to retain the holder in normal position. In a modification, Fig. 6, a shifting member a is attached to one of the flanges H of the stream-carrying table, and its head c is adapted to engage a fixed cam d and thereby cause its opposite end to engage with the shaping &c. device. The stem b may be provided with a disc c, by means of which it is secured to the head c, and between the head c and disc c a bow spring f is mounted. The ends of the spring f are slotted and attached to slides g, which are slotted for engagement by the fixing set-screws i. Instead of the bow spring f, a spiral spring k may be provided on the stem b. In the construction shown in Fig. 10, the member is attached to the side of the table H, and has a body v having a slant face w and two arms x, which are mounted upon spindles y, z attached to the table. The end c' of the member a engages with a fixed arm and is thereby pushed .inwards and caused to engage with the arm e<1> of a shaping &c. appliance or its frame. Springs a', b<1> are mounted on the spindles y, z. This arrangement causes downward movement of the shaping &c. appliance as it is carried along with the stream. The cam u may be arranged to move the appliance with the stream by substituting for the slant lace w, a flange l<1>, Fig. 10, to engage with the arm e<1>, or the two operations of vertical and longitudinal movement could be obtained by retaining the slant face wand providing a web l<1>, and causing the web l<1> to engage the arm e' before the latter contacts with the face w. As regards Fig. 12, a shifting member in the form of a spindle 106 having a head 105, is adapted to engage successively with the fixed cams, and the spindle slides in a guide 103 mounted upon a plate carried by an endless chain. The spindle 106 is controlled by springs 109, 109<1>. The rocking member 117, Fig. 13, consists of a flat spring 111, a contact piece 110, which engages with the fixed cam, .and a holding piece 114 attached to the contact piece 110. The spring 111 is carried by an endless chain. Specification 268,442 is referred to.