Improvements in Grinding Adjustments for Belt-knife Leather- splitting Machines.
Year: 1895

page_text: Date of Application (in United Kingdom), 13th Aug., 1895
Complete Specification Left, 13th Aug, 1895-Accepted, 21st Sept., 1895
COMPLETE SPECIFICATION.
Improvements in Grinding Adjustments for Belt-knife Leather-
splitting Machines.
1, JAMES ROBERTSON, of 17 Eastern Avenue, Woburn, in the County of
Middlesex, and State of Massachusetts, United States of America, Leather
Manufacturer, do hereby declare the nature of this invention, and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
This is an improved movement or adjustment of the belt-knife of a leather-
splitting machine, whereby opening of doors or kneeling by the operator is rendered
unnecessary, uniformity produced in the bevels on the opposite sides of the knife,
aud economy attained in the wear thereof, all with the effect of improving the
quality of work produced by the splitting knife.
The invention consists of the novel construction and arrangements of parts
hereinafter described, and illustrated in the accompanying drawings, in which
Figure 1 is a front elevation of a portion of a belt-knife leather-splitting
machine with my improved grinding adjustment applied thereto.
Figure 2 is a vertical section taken on line 2, Figure 1, looking toward the
grinders.
Figure 3 is a horizontal section taken on line y, Figure 2.
Figure 4 is a detail in section of a wrench whereby separate hand adjustment of
one of the grinders may be had.
Similar letters of reference indicate corresponding parts:
A represents a portion of the frame of an ordinary belt-knife leather-splitting
machine, and A¹ a bracket attached thereto. Secured to the bracket A' is a
vertical piece B from which extend portions B which constitute ways for the
horizontal movement of the slides C, set one above the other, as shown in Figures
and 2. D D are carriages adjustably secured to the slides at D' (Figure 3) and
having an independent movement (not new in this invention) whereby they may be
moved up and down and out of the way, if desired, by the hand wheels d. E E' are
shafts each having one bearing in a carriage D, (the other bearings being as usual,
and not new). These shafts are driven by the pulleys e e¹, and have rigidly
secured to them the grinding wheels F F. The grinders F F are set on opposite
sides of the cutting edge of the endless belt-knife K, which is driven in the usual
manner, and is guided and supported by the "grinder jaw" L which contains a
back-plate L' for the purpose of moving the knife forward as it wears.
P is a vertical shaft having its bearings in the frame of the machine and
extending up to a point convenient to the operator, so that he can rotate it by
means of the hand wheel P¹ without stopping. On this shaft P are fixed two

page_text: worms R R which engage respectively two gears S S' which are fast to screws V
extending into the recesses b in the ways B¹. These screws engage nuts W which
are secured to the slides C, (Figures 2 and 3). By rotating the shaft P therefore,
the screws V are rotated thus moving forward simultaneously the slides C, and
hence the carriages D which move the grinding wheels FF simultaneously
forward against the opposite sides of the edge of the belt-knife K, sharpening and
beveling both sides thereof at once with absolute accuracy, and of course
sharpening both sides absolutely alike.
Should it be desired to move forward one carriage and its grinding wheel
independently of the other, an adjusting wrench H, Figure 4, may be applied to
either of the heads of the screws or bolts V; the portion H' of said wrench being
used to actuate the nut h¹ on said heads.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed; I declare that what
I claim is:
In a grinding adjustment for belt-knife leather-splitting machines, the combination
of the ways B B secured to the frame of the machine, the horizontally moving
slides C in said ways, the carriages D secured to said slides, the driving shafts E'E
having bearings in said carriages, the grinding wheels F F fast on said driving
shafts, the belt-knife K extending between said grinding wheels, the vertical
shaft P provided with the worms R R¹, and the screws V provided with the
gears S S which are engaged by said worms, said screws engaging said slides C
by means of the nuts W, substantially as described.
Dated this Tmant:f
1
JAMES ROBERTSON.
Haseltine, Lake & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.