Patent GB-1056160-A (GB)
Title: Apparatus for imposing on an object a pattern of movement that corresponds to a given pattern defined on a reference plane
IPC: F16H35/00
Filed: 1964-05-05
Abstract: 1,056,160. Machine tools; grinding. P. V. N. HELLER. May 5, 1964 [June 14, 1963], No. 18718/64. Headings B3B, B3C, B3D and B3K. [Also in Divisions B6 and F2] A tool carriage 104 of a copying machine having a tool 101 is restrained to move parallel to work tables 12a, 12b, and an illuminated plate glass reference plane 11, and is moved by a telescopic lever 200 having a fixed, vertically adjustable pivot 212, a pivot 220 in the tool carriage 104 and an extendable stylus 204 moved to follow a master pattern on the glass 11. Adjustment of pivot 212 varies the ratio between the movement of stylus 204 and the movement of the tool 101. The tool carriage 104 together with tool holders 106, 108 connected by yoke 102 is supported against the underside of a fixed table 10a by pivoted spring struts 300, between the fixed table 10a and yoke 102. The tool holders 106, 108 extend freely through openings in the fixed table 10a. The lever 200 has an inner rod 214 with an end ball 212 socketed through a micrometer adjuster to the fixed table 10a, which rod slides within a tube 208 having a ball 220 forced by spring 122, between rod 214 and tube 208, into engagement with a socket 112, vertically adjustable by screw 114a in the tool carriage 104. The stylus 204 slides freely within tube 208 and engages a hollow in the top of a transparent block 202 with crossed hair lines for tracing along the master pattern. The ball 212 is socketed in a sleeve 246a fast in a movable piston 250 clamped by rotation of flattened rod 262 to compress a fibre plug 264 against a cylinder wall on the fixed table 10a. A micrometer spindle 244 bears through a ball race 256, Fig. 3 (not shown), ball 248 and block 246b on the ball 212 to measure the distance thereof from the fixed table 10a. The tool carriage 104 is connected to fixed table 10a for motion without rotation by two pairs of parallel links 132, 134 and 136, 138, Fig. 4, not shown, connected by a rigid floating member 139. Each link comprises end rods, e.g. 132a, 132e fast in the table 10a and member 139, and an intermediate rod 132b pivoted between balls 132d in the concave rod ends. A tension spring 132F fast with the end rods retains the balls and rods in place. The tool carriage 104 has screw adjusted balls 116a, 117a, 118a bearing on pads 116b, 117b, 118b on the underside of the fixed table 10a. The spring struts 300, Fig. 6 (not shown), have an outer tube 302, ball pivoted to the tool carriage yoke 102, and sliding against spring 308 on a rod 304 pin jointed at 304a to the fixed table 10a and having a helical projection 304b engaging the coils of spring 308. Rotation of the outer tube 302 thus varies the spring compression. The work-tables 12a, 12b are raised by levers 14a, 14b and locked in positions indicated by dial gauges I7a, 17b by screws 18a, 18b on or removed by screws I3a, 13b from columns 16a, 16b. The tool holders 108, 107 may be air motor or belt driven from motor 26 and dust is sucked therefrom by a flexible duct 25. The tool holders 107, 108 may receive ultrasonic impact grinder heads, or milling, drilling or grinding spindles.