Improvements relating to Engineer's "Cutter Bars' or Facing Tools.
Year: 1889

page_text: Date of Application, 28th Feb., 1889
Complete Specification Left. 27th Nov., 1889-Accepted, 18th Jan., 1890
PROVISIONAL SPECIFICATION.
"
Improvements relating to Engineer's "Cutter Bars' or
Facing Tools.
I, ANDREW ANDERSON of 432, Pollokshaws Road Glasgow, North Britain Engineer
do hereby declare the nature of this invention to be as follows
This invention relates to cutting tools for the use of Engineers and machinists
when facing those surfaces of metal plates which immediately surround the bolt holes
and has for its objects―
1st to construct such tools after a simpler fashion than hitherto adopted ;
2nd to make the several parts thereof more generally interchangeable :
3rd to lock and unlock the several members thereof: and
4thly to render such tools available for dressing surfaces which have hitherto been
difficult of access with facing tools.
I effect these objects by means of the mechanism which is illustrated in the accom-
panying drawings, in which,
66
Fig. 1 is a view in elevation of one form of my improved cutter bar" with its
several parts shewn in their relative positions and several of its parts detached and
shewn in elevation, plan and perspective.
Fig. 2 is a view in elevation of another form of my improved "cutter bar" with its
several parts shewn similarly to those of fig. 1, both of which are for use by hand.
Fig. 3 is a view in elevation of a still further variety of my "cutter bar" (with its
parts shewn detached as well as combined) adapted for use with rapid revolving
machinery instead of hand appliances.
Similar letters and marks of reference are employed throughout these illustrations
to indicate corresponding parts.
In figure 1, the spindle A is constructed suitably for its insertion, at the end
marked B, in a screw threaded bolt hole. Upon the said spindle, A, is placed a loose,
cutter marked C, which is faced with teeth marked D, and is pressed against the
surface surrounding the said bolt hole by means of a screwed nut, E, or its equivalent,
and (any number of) intervening washers, F. and G, the latter being provided,
internally with means such as the small key, tongue or feather, H, which reposes in
the groove marked J, within the screw threaded part of the spindle, or bar, A and is
thereby prevented from revolving round the bar. The cutter, C, is revolved by
means of a "Dwang," Key, Spanner, ratchet or other such like instrument.
The upper end of the spindle, A, is squared for the purpose of fixing (or otherwise
operating) the screw threaded end, B, in its place.
"
In figure 2 I have shewn a similar "cutter bar' to that delineated in fig. 1, but
with slight modifications which adapt it for uses different to those for which the-
combinations of A and C are intended. The spindle A³, as shewn in figure 2, is
intended for insertion within (or through) either a plain or screw-threaded hole and
the lower end thereof is recessed, as shewn at B2 with a (key or) "feather" portion B³
formed upon it for retaining the cutter C³ in its place whilst the latter is engaged in
facing the surface of the plate K. The bar or handle E² serves the purpose of the
aut E (figure 1) and a spanner: F and G are the same in this arrangement as in
hat shewn in figure 1. The upper end of the spindle A2 figure 2 is made angular
or other suitable shape) for the purpose of enabling the tool to be operated by a
Dwang" or other such instrument. The tongue or feather L upon the cutter C³ is
n integral part thereof. In figure I have shewn my improved "cutter bar" with
plain, smooth round spindle A³ adapted for use with a drilling machine or other
apidly revolving mechanism for which purpose the screw threaded portion containing
he slot J and the members E, F & G may be dispensed with, the shoulder A* upon
:

page_text: the spindle being sufficient to keep the cutter C2 in its position. The protruding
end B³ figure 3, is for insertion within the bolt hole whilst its surrounding surface is
. being dressed by the revolving cutter. The upper end of the spindle A³ may be
either round or angular and fastened in the drill spindle by means of a thumb screw,
pinching pin or other convenient agent.
The teeth upon the cutters C or C² may be shaped suitably for forming countersunk
recesses around bolt holes as well as for level dressing purposes as before described.
The Key or tongue part (L) upon the cutter C2 is an integral part of the cutter
itself and not a super added member. It is for the purpose of interlocking with the
projection B³ upon the spindles A² and A³.
Dated this 27th day of February
COMPLETE SPECIFICATION.
Improvements relating to Engineer's
Facing Tools.
" Cutter Bars' or
"
I, ANDREW ANDERSON of 432 Pollokshaws Road Glasgow North Britain 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 :-
This invention relates to cutting tools for the use of engineers and machinists when
facing those surfaces of metal plates which immediately surround the bolt holes and
has for its objects-1st to construct such tools after a simpler fashion than hitherto
adopted;
2nd to make the several parts thereof more generally interchangeable;
3rd to lock and unlock the several members thereof; and
4thly to make such tools available for dressing surfaces which have hitherto been
difficult of access with facing tools.
I effect these objects by means of the mechanism which is illustrated in the
accompanying drawings in which―
Fig. 1 is a view in elevation of one form of my improved "Cutter bar" and
Cutter ;
Fig. 2. is a view in elevation of another form of my improved "Cutter bar
Cutter.
"
&
Fig. 3 is a view in elevation of a still further variety of my "Cutter bar," and
Cutter.
Fig. 4 to 14 are views in perspective, elevation and plan of the several parts
composing figs. 1, 2 and 3.
Similar letters and marks of reference are employed throughout these illustrations
to indicate corresponding parts.
with
In figures 1, and 6 the spindle A is constructed suitably for its insertion, at the
end marked B, in a screw threaded bolt hole. Upon the said spindle A is placed a
loose cutter marked C which is furnished upon its face with teeth marked D and is
pressed against the surface surrounding the said bolt hole by means of a screwed
nut, E, figs. 1 and 5 or its equivalent E² fig. 12, and (any number of) intervening
washers, and G, figs. 1. 2. 8 and 14, the latter being provided, internally,
means such as the small key, tongue or feather H figs. 8 and 14 which reposes in the
groove marked J, figs. 1. 2. 6 and 11, within the screw threaded part of the spindle,
or bar, A and A³ and is thereby prevented from revolving round the bar. The
Cutter C figs. 1, 7 and 9 is revolved by means of a Dwang," (figs. 2 and 12) Key,
Spanner, Ratchet or other such like instrument. The upper end of the spindle A
figs. 1. 2. 3. 6 and 11 is squared for the purpose of fixing (or otherwise operating)
the (screw threaded) or other end of the bar, B, within its socket.
"
In figures 2, and 11, I have shewn a similar "cutter bar" to that delineated in
figs. 1, and 6 but with some slight modifications which adapt it for uses different 'to

page_text: those for which the combinations of A and C figs. 1, 6, 7 and 9 are intended. The
'spindle A² as shewn in figures 2, and 11, is intended for insertion within (or
through) either a plain or screw-threaded hole and one end thereof is recessed, as.
shewn at B2 figs. 4 and 11 and has a (Key or) "feather portion B3 formed upon
it for retaining the cutter C figs. 2. 3. 10 and 13 in its place whilst the latter
is engaged in facing the surface of the plate K, fig. 2 The Dwang, bar or
handle E figures 2 and 12 serves the same purpose as the nut E (figures 1 and 5)
and a spanner: F and G figs. 1. 2. 8 and 14 are the same in this arrangement
as in that shewn in figure 1. The upper end of the spindle A2 figures 23
and 11, is made angular (or other suitable shape) for the purpose of enabling the
bar to be operated by a spanner
"Dwang
or other such instrument. The
tongue or feather L upon the cutter C2 figs. 10 and 13 is an integral part
thereof. In figures 3 and 4 I have shewn my improved "cutter bar" with a plain
smooth round spindle A³ adapted for use with a drilling machine or other rapidly
revolving mechanism: for which purpose the screw threaded portion containing the
slot J and the members E, F & G figs. 1 and 2 may be dispensed with, the
shoulder A figs. 4 and 11 formed upon the spindle or bar being sufficient to keep
the Cutter, 0, in its position. The small or protruding end B³ figures 3, 4
and 11, is for insertion within the bolt hole whilst its surrounding surface is being
dressed by the revolving cutter. The opposite end of the spindle A³ figs. 3 and 4
may be either round or angular and fastened in the drill spindle by means of a
thumb screw, pinching pin or other convenient agent.
The teeth upon the cutters C or 03 are (or may be) shaped suitably for forming
countersunk recesses around bolt holes as well as for level dressing purposes as before.
described.
The key or tongue part (L) figs. 10 and 13, upon the cutter 02 is an integral part
of the cutter itself and not a superadded member. It is for the purpose of interlocking
with the projection B³ upon the spindles A2 and A³, figs. 4 and 11.
The recess B2 and the projection B³ are arranged for right and left hand motions
as required: the cutters (2 being used for dressing the under sides of plates as shewn
in fig. 2, or reversely for top dressing as shewn in fig. 3.
I make my improved "cutter bar" A, A³, and A³ in various ways, namely by
forging and turning it from Iron, Steel or other suitable metal, or by casting it in a
mould I also make my improved cutter C, or C2 variously, by forging, turning, and
otherwise shaping it from Steel, or by casting it of Steel in a mould.
I am aware that cutters and "Cutter bars
"
have been made, previous to my
invention, with provisions for right and left movements and for other purposes.
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 a "Cutter bar" the combination therewith of a screw threaded part B,
figures 1 and 6, all substantially as herein described and shewn and for the purposes
specified.
2nd. In a "Cutter bar" the combination therewith of a groove J, figures 1, 2, 6
and 11 all substantially as herein described and shewn and for the purposes
specified.
3rd. In a "cutter bar the combination therewith of a groove or slot B² and
projection B³, figures 4 and 11, all substantially as herein described and shewn, and
for the purposes specified.
4th. In a "Cutter bar" the combination therewith of a washer F, figures 1, 2, 8,
and 14, all substantially as herein described and shewn and for the purposes
specified.
5th. In combination with the "Cutter bar "
A, figures 1 and 6, of a cutter C,.
igures 1, 7, and 9, all substantially as herein described and shewn, and for the
purposes specified.

page_text: 6th. In combination with a "Cutter bar" A² or A³ of a cutter with an integral
member, L, all substantially as herein described and shewn and for the purposes
specified.
Dated this 26th day of November 1889.
JOSEPH
LOCKWOOD,
Argyle Street, Glasgow, Agent for the Inventor.