Patent GB-190619122-A (GB)
Title: Improvements in Eccentric Wheelers for the Treatment of Boots and Shoes Leather and for like uses
Inventor: BROOKES ALFRED GEORGE
Filed: 1906-08-27
Granted: 1907-02-21
Abstract: 19,122. Brookes, A. G., [Booth, I. E.]. Aug. 27. Embossing.-Relates to a machine for use primarily in forming stitch impressions on the soles of boots and shoes, but which can also be used for treating leather &c. The indenting-wheel 12 is mounted at the forward end of a long spindle 37, Fig. 2, which passes eccentrically through a sleeve 39 in a carrier 25, Figs. 1 and 2, ball bearings being provided to reduce friction, and thrust bearings 45, 46 to take the end thrust. The carrier 25 is mounted to oscillate on pivots 26, which are disposed at right-angles to the shaft 37. An extension 26<a> depends from the carrier and is engaged by a roller 27 on a spring-pressed plunger 28, which can be adjusted to vary the pressure of the wheel 12 on the work. The carrier is oscillated in a reverse direction to elevate the wheel 12 by means of a bell-crank lever 33, 35 actuated by a treadle. A screw bolt 36 limits the amount of this oscillation. The carrier is formed into a yoke at its central portion to receive a drive pulley 44, which is secured to the sleeve 39, the various parts being so arranged as to be balanced. The work is supported on a table 11 which is supported by a cupshaped casing 13 pivoted about a drive-shaft 15. The table is rotated by a worm on the shaft, gearing with a toothed rim 18 depending from the table, the rim being formed with a hollow bearing to fit over a stub shaft 20, projecting upwards from the bottom of the casing 13. A spring plunger 21 fitted in the shaft 20 projects downwards and rests upon the tubular projecting portion 24 of the machine frame in which the plunger 28 works, a clamping-bolt 23 being provided so that the position of the plunger, and consequently the inclination of the table 11, can be adjusted. When there is no work between the wheel 12 and the table 11, the tool 12 travels in a circular path of a diameter equal to twicethe eccentricity of the tool-spindle in its sleeve. When, however, the work is present, this movement is converted into a rapid substantially-horizontal movement of the tool, and a vertical movement of the carrier. By virtue of this conversion of the circular travel of the tool, the latter also receives a rapid rocking movement longitudinally of its engaging edge and the impressions which it forms, thereby allowing a less pressure to be used and consequently reducing the liability of the work being distorted. When the indenting-wbeel is elevated away from the work by the bell-crank lever 33, 35, an arm 51 on the shaft of this lever causes spring plunger 48 to be forced against a fibre collar 47, slidably mounted on the spind'e 37, and the rotation of the latter is immediately stopped. In some cases, it is desirous that the wheel 12 shall co-operate with the table 11 to feed the work, and to effect this by friction, washers 52, 53, Fig. 2, are mounted on the spindle 37, so that by rotating a nut 55 the friction between the spindle and the sleeve 39 will be sufficiently increased to cause the two to rotate together. An adjustable guard 56 is arranged in front of the wheel 12 to protect the shoe from injury. When the wheel is elevated, the guard is also raised by a pin 59 projecting from the carrier 25.