Year: 1887

page_text: Date of Application 9th July, 1887.
Complete Left, 28th July, 1887.
Complete Accepted, 30th Aug., 1887.
ROBERT COLLINGE of Commercial Mills, Oldham in the County of Lancaster,
Spinner and Manufacturer, do hereby declare the nature of this invention to be as
follows:-
The objects of my invention are to produce a fustian cutter's knife which will be
more economical in original cost than the ordinary knife, will be cheaper and easier
to keep in good cutting order, and will take ‘and maintain a finer, better, and more
lasting edge.
An ordinary fustian cutter's knife is made from a bar or rod of fine steel about one
quarter of an inch square in section. One end of this is heated and drawn out to a
thin point by hammering; after which it has to be ground and sharpened and fitted
with a grooved and pointed guide. The whole of this (shank and blade) has to be
made in one piece of the finest steel on account of the sharp cutting edge required at the
point, and as it wears away it has from time to time to be re-heated and drawn out
again, and then hardened and tempered, ground and sharpened; thus making the
keeping of the knife in proper cutting order a tedious and expensive process.
According to my invention I propose to make the knife in two parts, vizt. the
shank and the blade; the former I make of wrought iron or of a cheaper kind of steel
than is required for the cutting edge. This I make of square section about one
quarter of an inch drawn out to a moderate point, but shorter than and not so thin as
an ordinary knife.
The blade I make of a piece of watch or other similar spring ground to the
required form of point and edge. This I attach to one side of the thin end of the
shank so that it projects heyond the end of the same either binding it on with wire,
or preferably slipping a taper ferrule over the two so as to bind them firmly together.
They are then inserted in a guide of the usual form.

page_text: It will be evident that as the cutting blade only (which is a very small part) is
made of fine steel the original cost will be much less." As it is adjustable it will never
require to be drawn out and will therefore never require to be re-hardened and
tempered, and the temper being always the same it will be less liable to break.
It is also found that the steel of which watch and other similar springs are made will
take a finer edge and maintain the same in cutting order for a longer time than the
steel of which fustian cutters knives are usually made, and being of a very thin
section, and with parallel sides, will require less grinding to bring it to a cutting
edge.
GEORGE DAVIES,
4, St. Ann's Square, Manchester,
Agent for the Applicant.

page_text: I ROBERT COLLINGE of Commercial Mills Oldham in the County of Lancaster
Spinner and 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:-
-
The objects of my invention are to produce a fustian cutters knife which will be
more economical in original cost than the ordinary knife, will be cheaper and easier to
keep in good cutting order, and will take and maintain a finer, better, and more
lasting edge.
An ordinary fustian-cutters knife is made from a bar or rod of fine steel about one
quarter of an inch square in section.
One end of this is heated and drawn out to a thin point by hammering; after
which it has to be ground and sharpened and fitted with a grooved and pointed guide.
The whole of this (shank and blade) has to be made of one piece of the finest steel on
account of the sharp cutting edge required at the point, and as it wears away it has
from time to time to be re-heated and drawn out again and then hardened and
tempered, ground and sharpened; thus making the keeping of the knife in proper
cutting order a tedious and expensive process.
The nature of my improvenient in fustian cutters knives will be readily understood
on reference to the sheet of drawings hereunto annexed and the following explanation
thereof.
Fig. 1. on the drawing illustrates the separate parts of my improved knife, detached,
the shank end being represented as broken off. Fig. 2 is a side view and Fig. 3.
a plan view of the knife and guide complete, and Fig. 4 is a view illustrating the
method of grinding the blade as hereinafter explained.
According to my invention I propose to make the knife in two parts vizt., the
shank a, a (Fig. 1.) and the blade b, b; the former I make of wrought iron or of a
cheaper kind of steel than is required for the cutting edge. This I make of square
section (about one quarter of an inch) drawn out to a moderate point, but shorter
than.and not so thin as an ordinary knife.
The blade b, b (Fig. 1.) 1 make of a piece of watch or other similar thin steel
spring ground to the required form of point and edge. This I attach to one side
of the thin end of the shank a, a so that it projects beyond the end of the same
(Fig. 2) either binding it on with wire or preferably slipping a taper ferrule
the two, or otherwise, so as to bind them firmly together. They are then inserted
in a guide d, d of the usual form, as shown at Figs. 2 and 3.
e over
It will be evident that as the cutting blade, only (which is a very small part)
is made of fine steel, the original cost will be much less.
As it is adjustable it will never require to be drawn out and will therefore never
require to be re-hardened and tempered, and the temper being always the same it will
be less liable to break. It is also found that the steel of which watch or other similar

page_text: springs are made will take a finer edge and maintain the same in cutting order for a
longer time than the steel of which fustian cutters knives are usually made, and being
of a very thin section and with parallel sides, will require less grinding to bring it to
a cutting edge.
For grinding I find it preferable to bind the blade b, b and the point of the
shank a, a together temporarily by means of a taper ferrule e, e as shown at Fig. 4.
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 :-
The manufacture of fustian cutter's knives in two parts vizt. :-a taper shank
shorter than usual, and a thin parallel blade (preferably of watch spring or similarly
tempered steel) attached or bound to the tapered end of the shank by a binding
wire or ferrule or otherwise substantially as herein before described and illustrated
by the drawing annexed.