Improvements in and in connection with the Trimming of Type- bars in Linotype Machines.
Year: 1896

page_text: Date of Application, 23rd Oct., 1896-Accepted, 2nd Jan., 1897
COMPLETE SPECIFICATION.
Improvements in and in connection with the Trimming of Type-
bars in Linotype Machines.
I, THOMAS HENRY CATHERALL of 8 Saint John's Terrace, Old Youghal
Road, Cork, Ireland, Engineer, 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:-
My invention relates to improvements in and in connection with the trimming or
dressing of type or printing bars or surfaces in linotype machines, and consists-
Firstly of improvements in knives as used for this purpose, and Secondly-of
improvements in means for operating the movements and adjustment of the movable
knife to and from the fixed knife, the object of my invention being to provide a
simple, quick and easy means by which the said trimming or dressing may be
carried into effect by persons not necessarily trained therefor.
In machines of this type, it is usual to employ two knives mounted upon divided
blocks fixed to the frame of the machine, one of the said knives being a fixture,
while the other is adjustable so as to be brought nearer to, or farther from the
fixed knife, that the space between them may be made larger or smaller in order
to pass between them, and trim or dress type bars of any size in general use, and in
the following description of my invention it is assumed that two such blocks are in
position upon the frame of the machine, and that one of my improved knives (as
hereinafter explained) is fixed upon one of them.
In order that my said improvements and the manner in which I prefer to carry
the same into effect may be fully understood I have hereunto appended a sheet of
drawings of which,
Fig. 1 is a perspective view of one of the said blocks for carrying an adjustable
knife according to my invention.
Fig. 2 is a like view of the same with my improved knife, and my improved
means for adjusting the said knife in position thereon.
Fig. 3 is a perspective back view of my improved knife (according to one
method of construction) while Fig. 4 is a perspective top or front view of a block
or plate upon which Fig. 3 may slide.
Figs. 5 and 6 are views similar to Figs. 3 and 4 respectively, but illustrating an
alternative method of construction.
Fig. 7 is a sectional view of Fig. 2 with its opposing and fixed knife shewn by
dotted outlines.
In carrying my invention into effect I mount upon the adjustable knife block A,
a metallic or other block or plate B, which may be fixed thereto by any suitable
means, but preferably by that of screws or bolts C, passing through holes in A into
holes C¹ in B, the said block or plate having upon its outer surface a groove D,
preferably of dovetail shape in cross section, arranged at any suitable angle, and
extending from end to end thereof, and with this engages a like shaped tongue or
projection E, upon the back face of a like shaped metallic or other block or -
plate F, to which is attached or formed integrally therewith a knife G, having a
wavy or undulatory cutting edge G', opposed to, but parallel with the cutting
edge of a like knife H fixed upon the opposing block A, (shewn by dotted outline
in Fig. 7). The block or plate F is thus free to slide up and down, diagonally
upon the block or plate B, the former of which said movements would cause the
.

page_text: cutting edge G of G, to recede from the cutting edge of H, and to be brought
nearer thereto by the latter movement, the said cutting edges of G and H, being
nevertheless always parallel with each other, and to effect the said sliding of F
upon B, and the consequent widening or narrowing of the space between the
cutting edges G¹ and H, I pivotally mount upon the back edge of B, at a point a,
an arm or lever J, having at one end a slot b, with which engages a pin or stud c
upon the back edge of F, and it will be understood that if the opposite end of the
said lever J be lowered, the plate F would be raised, and the space between G
and H be thereby widened, and vice versa if the free end of J be raised, and in
order that the widening and narrowing of the space between G¹ and H may be
effected by infinitisimal stages, and the former fixed in any desired position, so as
to permit types or printing bars of various sizes to be forcibly passed between
them and be trimmed or dressed thereby, as indicated by X in Fig. 7, 1 provide
upon the arm er lever J a movable pin or stud K, and in the block A. any number
of preferably equidistant holes L, arranged in a sector of a circle, with either of
which the said pin or stud K may be caused to engage according to the desired
size of the space between G and H, and in order that the block F may be thereby
firmly held in the said position as long as required, and maintain the rigidity of the
knife G, 1 may form a screw thread in each of the holes L and a corresponding
thread upon the pin or stud K, so that the latter may be screwed firmly into the
former as shewn in Fig. 7.
I may in large sized machines or where otherwise desirable, form in the block B
two such grooves D as shewn in Fig. 6, and to correspond with these, I may
provide two such tongues or extensions E upon the block or plate F as shewn in
Fig. 5, the manner of adjusting and fixing F upon B being in this arrangement
the same as that previously described.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is,
1st. In an improved method of and means for trimming or dressing type or
printing bars or surfaces in linotype machines, the combination with such a
machine of fixed and movable knives, having undulatory or wavy cutting edges,
the said movable knife being arranged to slide diagonally upon a block or plate
fixed upon the frame of the machine, and operated by a lever or arm, with means
for adjusting and fixing the position of the said movable knife, relatively to that
of the fixed knife, substantially as and for the purposes herein set forth and
shewn.
2nd. In an improved method of and means for trimming or dressing type or
print-bars or surfaces in linotype machines, the combination with such a machine
of a pair of fixed blocks such as A, the one carrying a fixed and the other a
movable knife such as G, having wavy or undulatory cutting edges such as G,
the said movable knife being connected to or formed integrally with a plate such
as F, baving an angular tongue or projection or projections such as E, engaging
with an angular groove or grooves such as D in a plate or block such as B fixed
upon the block A, the said plate and kuife F G being caused to slide diagonally
upon B by the means of a lever J, pivotted upon B, and retained in any position
by the means of a pin or stud K engaging with holes such as L arranged to form a
sector of a circle in the block A, the whole connected, combined and operating
substantially as and for the purposes herein described and shewn by the appended
drawings.
GEO. THOS. HYDE,
1 Broad Street Buildings, London, E.C., Agent for the Applicant.