Improvements in or relating to Rotary Cutters or Paring Tools used in the Manufacture of Boots and Shoes.
Year: 1893

page_text: Date of Application, 4th May, 1893
Complete Specification Left, 1st Jan., 1894-Accepted, 3rd Feb.,
1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to Rotary Cutters or Paring Tools
used in the Manufacture of Boots and Shoes.
We, JOSIAH MENTOR GIMSON, JOSIAH GIMSON, ARTHUR JAMES GIMSON
and SYDNEY ANSELL GIMSON of the Firm of Gimson and Company The Engine
Works Vulcan Street, Leicester, in the County of Leicester, Engineers, do hereby
declare the nature of this invention to be as follows:-
This invention refers to improvements in or relating to rotary cutters or paring
tools used in the manufacture of boots and shoes. The object of the invention
being to provide means whereby the knives can be more effectually secured and
that their outer surface shall present a edge excentric to the spindle, thus giving
the required lead to the cutting edge, when they have been securely clamped on to
the spindle, or revolving shaft of the machine. To carry out our invention the
knife will be a portion of a continuous ring whose periphery is shaped by turning,
grinding or by other means, into a continuous form or shape suitable to the heel of
a boot or shoe or other object to be pared. The knives may be three or more in
number to complete the cutting head.
Each side of the knife will have an inner projecting rim shaped turned and
milled eccentric to the outer surface, and having one side of face dovetailed.
The three or more knives are held to the spindle by a sleeve having a flange
with outer edge turned concentric and so shaped as to fit the dovetailed rim before
mentioned.
The sleeve engages with the dovetailed rim and presses the side of each knife firmly
against a solid collar on spindle end. This is effected by means of a nut on the spindle
end or by the hole in sleeve itself being threaded to fit the screwed end of the spindle.
The outer projecting edges of the knives are secured solidly by means of a second
sleeve with a similar flange engaging the dovetailed inner rim at this end of
knife and being clamped thereto by means of a nut. The second sleeve is free to
slide on the boss of the first sleeve. The dovetailed flanges on the sleeves being
concentric with the spindle and the dovetailed inner rims of the knives being
excentric with the outer surface of the knives, the outer surface, when the knives
have been securely clamped on to the spindle will present a edge. excentric to the
spindle thus as before stated giving the required lead to the cutting edge. The
said cutter can be fitted upon any horizontal spindle or shaft and having thereto
the ordinary appliances for driving same.
Dated this 3rd day of May 1893.
W. B. MAXFIELD,
Applicants' Agent.
い
COMPLETE SPECIFICATION.
Improvements in or relating to Rotary Cutters or Paring Tools
used in the Manufacture of Boots and Shoes.
We, JOSIAH MENTOR GIMSON, JOSIAH GIMSON, ARTHUR JAMES GIMSON
and SYDNEY ANSELL GIMSON of the Firm of Gimson and Company The Engine
Works Vulcan Street, Leicester in the County of Leicester Engineers do hereby
declare the nature of this invention and in what manner the same is to be

page_text: .
performed, to be particularly described and ascertained in and by the following
statement :-
This invention refers to improvements in or relating to rotary cutters or paring
tools used in the manufacture of boots and shoes."
The object of the invention being to. provide means whereby the knives can be
effectually secured and that their outer surface shall present an edge excentric to
the spindle, thus giving the required lead or rake to the cutting edge when they
have been securely clamped on to the spindle or revolving shaft of a machine.
That our invention may be clearly understood reference is made to the sheet of
drawings annexed, in which
Figure 1, is a front elevation shewing nuts employed for securing the knives or
cutters to the cutter head or sleeve which secures the cutters to or against the
collar on the spindle or rotating shaft.
Figure 2 shows a sectional elevation of portion of the spindle, also the cutter
head or sleeves with cutters and nuts, the whole secured in position.
Figure 3 represents a view partly in section through line 1-2 Figure 2 shewing
the knives or cutters when secured in position and ready for cutting or paring the
heel of a boot or shoe, according to this invention.
Similar letters of reference denote like parts in all the figures.
To carry out our invention the knife will be a portion of a continuous ring whose
periphery is shaped by turning, grinding or by other means, into a continuous form
or shape suitable to the contour of the heel of a boot or shoe or other object to be
pared.
The knives A may be three or more, or less in number to complete the cutting
head, each side of the knife will have an inner projecting rim a shaped turned and
milled eccentric to the outer surface and having one side. face dovetailed.
The knives A are held to the spindle B by a sleeve C having a flange D with
outer edge turned concentric and so shaped as to fit the dovetailed rim a. The
sleeve C engages with the said rim a and presses the side of each knife firmly
against the solid collar E on the spindle B. This is effected by means of the nut F
on the spindle end or by a sleeve itself being screw cut to fit the screwed end of
the spindle. The outer ends or projecting edges of the knives A are secured
solidly by means of a second sleeve G with a similar flange D' engaging the
dovetailed inner rim a at this end of the knife and being clamped thereto by the
nut H.
The second sleeve G is free to slide on the boss c of the first sleeve C. The
dovetailed flanges D, D' on the sleeves C, G being concentric with the spindle B,
and the dovetailed inner rims a of the knives A being excentric with the outer
surface thereof, when the knives or cutters A have been securely clamped on to
the spindle the outer surface will present an edge excentric to the spindle thus as
before stated giving the required lead or rake to the cutting edge.
The said cutter can be fitted upon any horizontal spindle or rotating shaft
provided with the necessary appliances for driving same, and arranged with a collar
such as shown in Figure 2 of the drawings.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A rotary cutter or knife in three or more, (or less) parts having a continuous
form or shape ou its outer surface and having excentric projecting internal rims to
engage with fixings.
2. For fixing the said rotary cutters on the spindle the employment of a double
rleeve or sleeve having flanges engaging with their excentric projecting internal
sims, the whole secured by nuts and screws in the manner set forth.

page_text: 3. The combination of knives and sleeves forming a cutter head with its periphery
backed off from each cutting edge, with knives held in dovetailed continuous
circular grooves. Substantially as herein before described and set forth.
Dated this 26th day of December 1893.
WILLIAM BESTWICK MAXFIELD,
Registered Patent Agent,
19, Bowling Green Street, Leicester, Applicants' Agent.