Improved Devices in or connected with Machinery to be Used in Cutting or Forming the Teeth or Projections in Rack Bars for Mountain Railways and similar purposes.
Year: 1895

page_text: Date of Application, 2nd Mar., 1895-Accepted, 6th Apr., 1895
COMPLETE SPECIFICATION.
Improved Devices in or connected with Machinery to be Used in
Cutting or Forming the Teeth or Projections in Rack Bars for
Mountain Railways and similar purposes.
I EDWARD SUGDEN, of Kimberworth House, Kimberworth, near Rotherham,
in the County of York, 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 :-
The aim and object of this invention, being to construct a machine or machinery
capable of forming or cutting the whole of the teeth in any desired quantity or
number of suitable metallic bars, and finishing the same to any required and uniform
length, at one and the same operation I attain by constructing my machine with
and having a movable metallic table, working on the horizontal plane, between two
or more strong vertical uprights or standards, provided with the necessary bearings
or pedestals, in which a suitable horizontal bar (parallel with the before mentioned
table) having annular ribs and grooves, for the purpose of carrying and operating
any desired number of approved cutters may revolve, the said bar being driven or
actuated (by being coupled at one or both ends) by triple geared head-stocks (or
other approved mechanical arrangement) worked by belting, shafting or other
similar means.
By referring to the accompanying sheets of drawings, in which same letters of
reference indicate similar parts or details in the various views or figures illustrated
it will be seen that Figures 1 and 2 Sheet 1, shew a front elevational view and
plan, respectively of a machine having a metallic and rectangular table A, moving
horizontally between the uprights or standards of suitable configuration B, which
carry and guide the revolving bar C, having the annular ribs T, which are provided
with the cutters D, and which said bar C, is coupled by suitable appliance,
preferably, at both ends B', to the triple or other geared headstocks E, driven by
belting E¹ or other mechanical arrangement.
The table A may be carried by and move upon the slides F, constructed of
suitable design and material, being actuated by means of the screws G, passing
through the full length of the said slides F, and engaging with the nuts H, placed
in the recessed or box portion J, formed or constructed on the underside of the
table A, these screws G are, or may be, provided with and actuated by one or more
worm wheels K, operated by a worm or worms L, which are carried and secured
in the requisite position on the ends or other convenient part of slides F by the
brackets M.
A horizontal shaft N preferably square, passing through the worm or worms L,
may be worked by a ratchet wheel O, and lever and pawl Q, suitably driven, or
moved as required by any other approved device.
To obtain a quick return movement of the table A, I use, preferably fast and
loose pulleys P and P¹, driven by an independent belt.
On the table A, parallel with the longer sides I form or construct a series of
lugs or projections R, removable or otherwise, through which may be passed
setscrews or studs S, for the purpose of firmly securing the bars to be operated
upon, in the required position on table.
On that portion of the revolving bar C, which extends between the uprights or
standards B, I form a series of annular ribs T, and the grooves T¹, of suitable
sectional configuration and size, illustrated more fully by Figures 3 and 4
Sheet 2.

page_text: Across the annular ribs or projecting parts T, in line with, and radiating from, a
concentric circle d, of approved diameter with the axis of the said bar C, I cut or
form any approved number of grooves or spaces Z; of the requisite width, into
which are secured (by means of metallic wedges or keys Y, or their equivalent)
the cutters W, of steel or other material, as may be found most advantageous, of
the size and shape required.
It will be seen that the grooves or spaces Z across the annular ribs T, are not cut
or extended to the full depth of the said annular ribs T, and by forming that part
of the cutter W (which comes into contact with the bottom of the grooves or
spaces Z), with projecting lips w, which overlap the uncut portion of the annular
ribs, I secure the said cutters firmly in position in a lateral direction.
Some of the said cutters may be made to extend across the annular grooves T',
on bar C, for the purpose of finishing the top or upper edges of the teeth in
rack bars.
The cutters W', which are fixed in the extreme annular ribs are formed to finish
the bars to any requisite and uniform length.
The beforementioned cutters are shewn detached and separate by Figures 5 and 6
Sheet 2.
That part or portion C¹, of the bar C, which revolves in the standards B may be
bushed, or if considered necessary, adjustable bearings may be provided and any
vertical or lateral movement of the bar C, together with the cutters W may be
provided for, this is not shewn on the drawings, but any approved arrangement
may be applied for the purpose, although this is not considered necessary for the
due working of the machine.
Around the upper edges of the table A, I form or provide a recess or groove V,
to be used for the purpose of collecting and conveying the waste water or liquid
(which has been used for the revolving cutters) into a tank or similar receptacle,
from which it may be drawn for further use.
By referring to the plan of machine, see Figure 2 Sheet 1, in which the table A
is shewn partially under the revolving bar C, it will be seen how the bars ✗, to be
operated upon, are placed in position on the table A, before being passed forward
under the revolving bar C, provided with the annular ribs T, containing the
cutters W, and wedges Y, for securing the same.
In forming the grooves or recesses Z across the annular ribs T on bar C, to
receive the cutters W, I think it advisable to make the whole of said grooves
assume a somewhat spiral form, in a lateral direction, along the revolving bar C,
as shewn by Figures 1 and 2 Sheet 1. By so doing the strain transmitted by the
cutters when working is more equally distributed over the whole length of
said bar.
Figures 7 and 8 Sheet 2 shew a portion of the length of the rack bar, before and
after being operated upon.
I do not bind or confine myself to the exact design or details of machine as
shewn, but which will be found sufficiently explanatory to illustrate the principle
of my invention.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed declare that
what I claim is
Machines for the purpose of forming the teeth or projections on rack bars (as
used on and for mountain or inclined railways or similar purposes) and finishing the
same to one uniform length at one and the same operation, constructed with and
having a revolving bar provided with cutters of suitable configuration, a movable
table, with the slides and standards, substantially as and for the purpose or purposes
herein described and illustrated on annexed drawings.
Dated sh
1
CL
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