Patent GB-190409754-A (GB)
Title: Improvements in or relating to Glass Grinding and Bevelling Machinery.
Inventor: GOEHRING CHARLES LOUIS
Filed: 1904-04-28
Granted: 1904-07-28
Abstract: 9754. Goehring, C. L., and Troche, W. April 28. Rollers, trueing; bevelling and surfacing glass. Fig. 2 is an end view and Fig. 4 a cross-section seen in the opposite direction. The plate clamped against the undersurface of a slightly inclined bed K is ground at the edge by a roller C, the bearings C<1>, C<2> of which are connected by links D to arms D<1> on a rocking shaft D' so that they are reciprocated on slightly inclined guides C<3>. The roller is driven from a main shaft B by a pair of endless chains B', and a shaft E, from which the rocking shaft gets its motion, is driven first in one direction slowly or quickly and then in the opposite direction quickly or slowly by belts on pulleys E', E<2> which are alternately engaged by a clutch between them. The rocking motion is derived from this reversible rotation through a worm-wheel F<1> on a shaft F<2>, reducing bevel gear F<3>, F<4>, spur gear F<6>, F<7> and arms G, D<3> connected by a link G'. The link, being pivoted to the driving-arm G, is oscillated along a slot in the driven arm by means of a crank H<2> with a connecting-rod H<1>, which is driven from the shaft F' of the worm-wheel through a vertical shaft and equal pairs of mitres H<4>, H<7>. Thus, the stroke of the roller is made at speeds which are accelerated from the mid position to the limits. The grinding-roller has also a slight longitudinal reciprocation imparted to it by means of a long crank on a transverse shaft. The swivel I<1> for shifting the clutch between the pulleys E<1>, E<2> is operated for engagement by a hand-lever I<4> with connecting-rod I<3>, and for disengagement by one of the springs i opposed to a pin i<2> on the rod, spring catches I<6> being provided to hold the rod till the terminations of the stroke, when projections I<8> on the sliding bearings detach them. By a second hand-lever I<11> and rods I<10> with projections I<12>, the pawl may be detached at any time in the stroke. The bed K, having arms K<7> flanking the roller, is trunnioned to arms of a frame K<1>, and is set at any desired inclination by screws K<8>, while the frame K<1> can be raised or lowered by screws K<2>. To insure accurate adjustment, a reading-edge k<5> and curved scale k<6> are provided, as also a pointer and a vertical scale, the curved scale having several sets of readings for the same widths of bevels with different depths. Adjustment of widths and depths is provided by having the trunnions in sliding blocks to be fixed by set-screws. The glass plate is held against the bed by clamps L which lie in grooves in supports L<1> and are fixed by screws L<3>, the supports being themselves pivotally mounted on vertical slides M. These slides are carried by a rocker N in a central slide N' which can be raised and lowered by a pinion N<3> with worm gear N<6>, N<8> for actuating it. The weight is counterbalanced by a loaded lever acting on the shaft N<4> of the worm-wheel. A water-tank which encloses the clamps has a flexible bottom which is continued downwards as a bag R, so that, by squeezing or freeing the same, the water-level can be changed. A squeezing-board R<2> is operated by a cam R<6> on a shaft of the reciprocating-gear so as to let the water-level be below the roller at the interval when it is clear of the plate. For maintaining a true face on the roller, an adjustable dresser is provided on a carriage which can be shifted in true guides T<1> by a screw T<3>. Oppositely-running pinions T<5> on a hand-lever T<6> enable the screw to be turned in either direction.