Patent GB-190613688-A (GB)
Title: Improvements in Pattern Grading Machines.
Inventor: COTE LOUIS EUCLIDE
Filed: 1906-06-14
Granted: 1907-02-07
Abstract: 13,688. CotÚ, L. E. June 14. Pantographs. - Relates to a device for producing from a given pattern a copy which is enlarged or decreased in different proportions in t w o directions, and to providing means whereby these directions may be changed, or whereby the enlargement or diminution along a given direction may be prevented if desired. The device may be used for making patterns of boots, shoes, or other garments, or for the production of maps. The pattern A, Fig. 1, preferably made from sheet metal, is supported at a suitable distance above a base - plate B, and its edge is engaged by the grooved periphery of a follower c, Fig 3 and 5, which is secured by a pin to a plate d. A second pin projects downwards from the latter into a bracket D, the ends of which are bent inwards and secured between two flat annular rings E, F, which are adjustably held together by bolts and slots i, j, Fig. 1. The upper ring E has pivoted to it, at the points k, l, two uniformly graduated levers G, H, preferably circular in cross-section, the upper end of the levers being connected by a bar I, which is supported above the base-plate B by standards m, n, Fig. 3. The other ends of the levers are connected by adjustable straps p to a bar J, which can be moved lengthways in a casing K. To the centre of the latter, and at right-angles to it, is secured a slide L, which is enclosed in a casing M. This casing can be adjusted angularly about a pivot pin extending through a block into the base-plate B, and is clamped in its adjusted position by an arc sector N and a thumb-screw &c. The levers G, H are partly encircled by adjustable straps x, y which are pivotally secured to a plate 0. To the centre of the underside of the latter is secured a flanged rod P, which extends through grooves 10, Fig. 8, in a block Q which carries the marking-pencil R. The block Q preferably consists of two blocks 12, 13, pivotally connected, the lower block being grooved similarly to the grooves 10 to receive a bar S, which is integral with a plate T, Fig. 1. Two straps 16, 17, simirar to the straps x, y, are pivoted to this plate, and are adjustably secured to graduated levers U, U', corresponding exactly to the levers G, H. Their outer 'ends are secured together in a similar way to those of the levers G, H, and they carry a slide Y corresponding to the slide L. In use, the straps x, y, p are placed at graduations on the levers G, H corresponding to the desired proportionate increase or decrease of the pattern in the direction of the slide L, and the straps 16, 17, 20 are then adjusted along their levers to the desired increase &c. in the direction of the slide M, these two slides, and consequently the rods P, S, normally reciprocating at right - angles to each other. The marking-pencil traces out a copy as a result of the combined movement of these two slides. The direction along which the increase &c. is to take place is varied by angularly adjusting the casings M, Z, the rings E, F being correspondingly adjusted. If desired, however, the means for effecting this adjustment may be dispensed with, and the rings E, F combined in a single plate. By adjusting either of the rods J, W in their casings K, X, however, the enlargement of the copy in the direction affected by such adjustment will be prevented.