Year: 1888

page_text: Date of Application, 16th Jan., 1888
Complete Left, 5th Mar.; 1888
Complete Accepted, 20th Apr., 1888
I, JOSEPH BARROW partner of the firm of Thomas Shanks & Company, Union Iron
Works, Johnstone, in the County of Renfrew, North Britain, Engineer and Tool
Maker do hereby declare the nature of this inventson to be as follows :—
This Invention, which relates to improvements in edge planing machines, has for
its object to overcome a certain serious defect in such machines as hitherto constructed
and which may be well understood by the following explanation of such defect.
"
In that class of planing machines known as an edge" or "plate-edge" planing
machine as hitherto constructed and which consists of a slide-bed sometimes called
"shears
upon which a saddle carrying a tool holder is moved by means of a screw
and which saddle is fitted upon V or square slides placed on the outer edges of
the bed it is found that the strain upon the tool when cutting the plate causes the
saddle to twist sideways upon the bed thereby making the tool "dig" into the work
and preventing the workman not only from taking a satisfactory cut but, when the
plate is of great thickness causing the stoppage of the machine through the slipping
of the driving belt.
:
This Invention consists in eliminating these disadvantages by so arranging the slides
of the bed or shears that the pressure of the cut upon the saddle tends to release the
tool instead of causing it to "dig" into the work as herein before described.
The bed is provided with slides arranged inside instead of outside and into which
slides the saddle carrying the cutting tool is fitted, so that when the saddle twists
sideways upon the bed the tool is relieved.
For the purposes of this Invention the slides are square or nearly so to the face of
the bed and any lifting action that the tool in cutting may give or tend to give to
the saddle is prevented by a square slide on the outside of the bed, it being explained
that the saddle is clear of this slide at the edge and fitted only at the under part of the
projection of this same slide.
ST. JOHN V. DAY.
115, St. Vincent Street, Glasgow,
Petitioner's Agent.

page_text: I
I, JOSEPH BARROW, partner of the firm of Thomas Shanks and Company Union
Iron Works, Johnstone, in the County of Renfrew, 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 :-
" edge" or "plate-edge" planing
My Invention, which relates to improvements in edge planing machines, has for its!
object to overcome a certain serious defect in such machines as hitherto constructed
and which may be well understood by the following explanation of such defect.
In that class of planing machines known as an
machine as hitherto constructed and which consists of a slide-bed sometimes called
shears." upon which a saddle carrying a tool holder is moved by means of a screw
- and which saddle is fitted upon V or square slides placed on the outer edges of the
bed it is found that the strain upon the tool when cutting the plate causes the saddle
to twist sideways upon the bed thereby making the tool "dig" into the work and
preventing the workman not only from taking a satisfactory cut but, when the plate
is of great thickness causing the stoppage of the machine through the slipping of the 1
driving belt.
This Invention consists in eliminating these disadvantages by so arranging the sides
of the bed or "
shears" that the pressure of the cut upon the saddle tends to release
the tool instead of causing it to "dig" into the work as herein before described.
The bed is provided with slides arranged inside instead of outside and into which
slides the saddle carrying the cutting tool is fitted, so that when the saddle twists
sideways upon the bed the tool is relieved.
For the purpose of my Invention the slides are square or nearly so to the face of
the bed and any lifting action that the tool in cutting may give or tend to give to the
saddle is prevented by a square slide on the outside of the bed, it being explained that
the saddle is clear of this slide at the edge and fitted only at the under part of the
projection of this same slide.
In order that my said Invention may be fully understood, I have hereunto appended
four explanatory sheets of drawings illustrating the same and in the several Figures
of which corresponding parts are marked with the same letters of reference.
Of these drawings Figure 1, is a front elevation of an edge planing machine
constructed in accordance with my improvements.
Figure 2, is an end elevation of the same, and
Figure 3, a plan thereof.
Figures 4, and 5, are enlarged transverse sections of parts of the said machine and a
hereinafter more particularly referred to.

page_text: In Figures 1, 2 and 3, the bed or
"shears " of the edge planing machine is
marked A, and its shape and construction is better seen on the enlarged transverse
section Figure 4. The saddle B, is formed with a strong projection C, at its
underside which fits in between the two sides of the bed or "shears" A, and to its
front part there is attached the projecting lip D, which engages with the underside of
the outer projecting edge of the bed or shears" A. This lip D, is attached to the
saddle B, by means of bolts E, Figures 2 and 4. In this lip D, there is also carried
the portion of the nut which engages with the driving screw F, as shewn. On the
saddle there is mounted the tool holding and adjusting arrangements H, as shewn in
the Figures, for holding and adjusting the tool I, as well as for reversing it at the
termination of each traverse of the saddle along the bed or "shears" after having
made a cut. As the tool-holding, adjusting and reversing arrangements contain
nothing novel and are of a well-known kind ordinarily in use in planing machines,
there is no occasion to describe them as they do not constitute any part of my
Invention, and this remark also applies to the clamping beam J, with its clamping
screws K, fastened to the over hanging brackets L, for clamping plate M, to be
planed down upon the table N. The gear too for driving and reversing the driving
screw F, being also of a kind that is commonly in use in machines of the class to
which my improvements apply and being therefore well understood need not be
herein further referred to.
66
Referring to Figure 3, of the drawings, it will be be seen that when the tool I, is
cutting the edge of the plate M, in the act of planing that edge that the part C,
which projects from the underside of the saddles and fits between the inner parallel
sides of the bed or "shears "A, when that saddle is moving in the direction of that
large arrow marked P, takes its pressure against the inner sides of the said bed or
"shears" at opposite ends in the direction of the smaller arrows marked Q, and R,
respectively. On making the return cut this pressure of the saddle and its projections C,
against the inner side of the bed or shears " is reversed. By means of this
construction of the saddle with the long projections C, bearing against the inner sides
of the bed or "shears" instead of the saddle being caused to bear as hitherto upon
the outer sides of the bed or "shears" the tendency of the tool to "dig" into the
work being planed, is obviated as by means of the inner sides of the bed or "shears "
guiding the saddle and cutting tool, the tendency of the pressure of the cut is to force
the tool away from the work instead of into it as is the case with saddles mounted
upon and guided by the outside edges or slides of the bed or "shears" of such
machines.
In Figures 1, 2, 3 and 4, I have shewn the driving screw F, placed as near the cut
as possible and which is the position preferred by me as that best adapted for the
propulsion of the saddle without undue friction, although the driving screw when so
placed has the disadvantage of dirt and dust and cuttings from the plate whose edge is
being planed falling upon it. To obviate these disadvantages the driving screw F,
may be placed between the inner surfaces of the bed or "shears" as shewn at Figure 5,
in which position it is protected from the dust and dirt and cuttings from the plate
falling upon it.
The tendency of the upward lift of the tool in both arrangements is counteracted by
the lip D, engaging with the outer projecting edge of the bed or shears."
"
With regard to the projecting lip D, it is to be noticed that it engages with the
under or horizontal projecting edge of the bed or "shears" only and that there is no
contact between-the vertical edges of the said lip and the vertical edges or faces of
the bed or " shears."
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
clain is :-
1. In edge planing machines, sometimes known as "plate edge" machines, the
construction of the saddle of such machines with a projection at the underside thereof

page_text: which fits and works in between the parallel inner faces or edges of the bed or
"shears" of such machines so that the tool is prevented by this projection bearing
against the said inner faces of the bed or "
"
shears from digging into the working
plate as hereinbefore described and shewn upon the annexed sheets of drawings.
2. In edge planing machines sometimes known as "plate edge" machines, wherein
the saddle is formed with a projection at its underside for fitting into and being
guided by the inner faces or edges of the bed or "shears," the lip D, which engages
with the under horizontal face of the projecting outer edge of the bed or " shears,"
but whose vertical faces are out of contact with the vertical faces of the bed or
"shears" substantially as hereinbefore described and shewn upon the annexed sheets
of drawings.
ST. JOHN V. DAY,
Applicant's Agents.