Patent GB-140257-A (GB)
Title: A machine for drawing coloured lines on crystal, glass and other like objects
IPC: C03B33/06
Filed: 1919-05-10
Abstract: 140,257. Fitzpatrick, H. D., (Fours et ProcÚdÚs Mathy Soc. Anon.). May 10, 1919. Tools for setting-out work.-An appliance for marking various lines, curves, &c. on glass and the like preparatory to cutting, comprises a central table and, arranged round it, a series of marking-devices having pencils for marking the lines and curves in coloured liquid. The table is rutatable, but may be fixed at will in the desired positions. As shown, the table 3 for supporting- the object 22 to be marked is rotatably mounted on a vertical pin 2 in the centre of the frame 1 which carries the marking-devices 67, 89, 94, &c. On the table 3 are three radial slides 5 having rubber-covered pins 6 for clamping the object, and operable simultaneously to centre it after the manner of a chuck. A drum 97 secured to the table 3 has a series of horizontal rows of holes 7 at different distances apart, any of which may be engaged by a pin 8 for locking the table. The pin 8 is adjustable in height, to engage any one of the rows of holes 7, on a bracket 14, and is spring-pressed into engagement, after withdrawal by its operating-handle 9. A centring and steadying clamp for the upper end of the object comprises a conical buffer 18 rotatably mounted at 21 on a rod 19 slidably mounted in a bracket 24 adjustably fixed by a screw 27 on a post 26. A lever 31 is provided for lifting the rod 19 and buffer 18, which are pressed downwards by a spring 30. The various marking-devices are arranged round the table 3 on supports 36, 59, 49, 68, &c., and each is provided with one or more pencils or pens for applying a coloured liquid. These pencils, as shown at 67, Fig. 3, each comprise a pointed tube 67 having a ball valve closed by a spring 46 and opened, when the pencil is pressed against the object 22, by a needle point 47 on the ball projecting through the nozzle or opening. For marking lines in vertical planes, a pencil 38 is carried by a handle portion 39, 40 pivotally mounted and also slidable in a radial direction on a bracket 36, the pivotal support 43 being adjustable in a vertical slot. Concentric circles may be traced on horizontal or approximately horizontal surfaces of the object 22 by a series of depreseable vertical pencils 53 adjustable in slots 51 in an horizontal arm 48 adjustable vertically and angularly on a post 49. Horizontal circles may be marked on inclined or vertical surfaces of the object by a series of pencils 67 slidable in brackets 61 adjustable vertically and angularly on a slotted bracket 59. Springs 66 retract the pencils, any of which may be pressed inwardly to engage the object. Helical lines are marked by a pencil 89 in a carrier 75 movable vertically in a bracket 69, 70 and engaging a helically grooved shaft 68 journaled in the bracket. The shaft 68 is geared by variable and reversible gearing, shown in Fig. 3, to a wheel 88 on the table, so as to rotate the table 3 and object 22 when the carrier 75 is moved up or down. Arcs of circles and other curves may be marked by a pencil 94, Fig. 4, on a jointed compass or carrier 99 pivoted to a pin 95 which may be pivotally engaged in any one of a series of horizontal holes 96 in a vertical plate or bracket 93. The curves are made by pressing the pencil 94 against the object, and at the same time rotating the compass about the pin 95.