New or Improved Machinery for Finishing or Machining the Peripheries of Pulleys and Fly Wheels, and for other like purposes.
Year: 1895

page_text: Date of Application, 9th Nov., 1895
Complete Specification Left, 4th July, 1896-Accepted, 22nd Aug., 1896
PROVISIONAL SPECIFICATION.
New or Improved Machinery for Finishing or Machining the
Peripheries of Pulleys and Fly Wheels, and for other like
purposes.
We, TANGYES MACHINE TOOL COMPANY LIMITED, of Oxford Works, Soho,
in the County of Stafford, Tool Manufacturers, and JOHN TANGYE, of No. 30
Holyhead Road, Handsworth, in the County of Stafford, Mechanical Engineer,
and WILLIAM HENRY BAILEY, of " Mayflower" Edgbaston Road, Smethwick,
in the County of Stafford, Mechanical Engineer, do hereby declare the nature of
this invention to be as follows:-
The said invention consists in the construction and arrangement hereinafter
described of the parts of machinery for finishing the peripheries of pulleys and fly
wheels and for other like purposes, the said machinery being capable of producing
on the periphery of the pulley or fly wheel or the like either a surface truly
cylindrical or nearly so, or a surface slightly convex or slightly concave as
hereinafter more particularly described.
We will describe the said invention in connection with the finishing, or as it is
technically called the machining of a metallic or non-metallic pulley.
With a face milling cutter of the ordinary kind, having solid or inserted teeth or
cutters we combine mechanism consisting essentially of the following combination
of parts. A vertical spindle is carried by a table to which a slow rotary motion
may be communicated by a worm and worm wheel or other equivalent gearing.
The said table is supported upon a compound slide so as to be capable of
receiving motion in the line of the axis of the face cutter and at right angles
thereto. The pulley to be operated upon having been previously bored is placed
and fixed in position upon the vertical spindle described.
By means of the compound slide the periphery of the pulley can be brought
within the range of the face cutter. A slow rotary motion being communicated in
the manner hereinbefore described to the vertical spindle and the said face cutter
being put into action, the periphery of the pulley is machined or finished by the
cross action of the cutters. When the vertical spindle carrying the pulley being
operated upon is situated in the line of the axis of the rotating face cutter the
cutters shape the periphery of the pulley of a slight convex or crown face. By
moving the vertical spindle so as to bring it towards the line or path of the cutters,
the convexity or crowning is reduced. When the said spindle is in line with the
cutters the said cutters shape the periphery of the pulley of a truly cylindrical
figure or nearly so. When the spindle carrying the pulley is at a greater distance
from the axis of the rotating face cutters than the cutters themselves, the
periphery of the pulley is shaped of a concave figure the concavity varying
with the distance the vertical spindle is from the axis of the rotating face
cutter.
When machinery constructed according to this invention is to be used for
machining fly wheels and other articles, slight modifications are necessary but
hese modifications are unessentials and we do not consider it necessary here to
lescribe them.
Dated this Ninth day of November 1908
W. T. WHITEMAN,
Agent for the Applicants,

page_text: New or Improved Machinery for Finishing or Machining the
Peripheries of Pulleys and Fly Wheels, and for other like
purposes.
We TANGYES MACHINE TOOL COMPANY LIMITED, of Oxford Works, Soho,
in the County of Stafford, Tool Manufacturers and JOHN TANGYE, of No. 30
Holyhead Road Handsworth, in the County of Stafford, Mechanical Engineer,
and WILLIAM HENRY BAILEY, of "Mayflower," Edgbaston Road, Smethwick,
in the County of Stafford, Mechanical Engineer do hereby declare the nature of
'the said invention and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :-
The said invention consists in the construction and arrangement hereinafter
described of the parts of machinery for finishing the peripheries of pulleys and fly
wheels and for other like purposes, the said machinery being capable of producing
on the periphery of the pulley or fly wheel or the like either a surface truly
cylindrical or nearly so, or a surface slightly convex or slightly concave as
hereinafter more particularly described.
We will describe the said invention in connection with the finishing or as it.is
technically called the machining of a metallic or non-metallic pulley.
1
With a face milling cutter of the ordinary kind, having solid or inserted teeth or
cutters we combine mechanism consisting essentially of the following combination
of parts. A vertical spindle is carried by a table to which a slow rotary motion
may be communicated by a worm and worm wheel or other equivalent' gearing.
The said table is supported upon a longitudinal slide so as to be capable of
receiving motion in the line of the axis of the face milling cutter and the milling
cutter head is carried by a transverse slide by which the face milling cutter is
capable of motion in a line at right angles to that of the table carrying the
*vertical spindle. Or the milling cutter head may be fixed the rotating table and
spindle being supported upon a compound slide. By means of the two slides or
the compound slide the periphery of the pulley can be brought within the range of
the face milling cutter. A slow rotary motion being communicated in the manner
bereinbefore described to the vertical spindle and the said face cutter being put
into action the periphery of the pulley is machined or finished by the cross action
of the cutters. When the vertical spindle carrying the pulley being operated upon
is situated in the line of the axis of the rotating face cutter, the cutters shape the
periphery of the pulley of a slight convex or crown face. By moving the vertical
spindle so as to bring it towards the line or path of the cutters, the convexity or
crowning is reduced. When the said spindle is in line with the cutters the said
cutters shape the periphery of the pulley of a truly cylindrical figure or nearly so.
When the spindle carrying the pulley is at a greater distance from the axis of the
rotating face cutters than the cutters themselves, the periphery of the pulley is
shaped of a concave figure the concavity varying with the distance the vertical
spindle is from the axis of the rotating face cutter.
Figures 1 and 2 of the accompanying drawings represent in front elevation and
plan respectively one arrangement of the machinery constituting the said invention,
the parts of the said machinery being in position for producing on the periphery of
the metallic pulley to be operated upon a convex, or, as it is technically called, a
crown face.
Figure 8 is an end elevation of the said machinery Figures 1 and 2, and
Figure 4 is a vertical section of the same, the said section being taken through
the axis of the vertical. spindle on which the pulley to be operated upon i
fixed

page_text: Figure 5 represents the said machinery in plan with the parts in position for
producing on the periphery of a pulley a cylindrical or approximately cylindrical
Burface of the kind shown in the pulley Figure 5ª.
I
Figure 6 represents another plan of the said machinery the parts being in.
position for producing on the periphery of a pulley a concave or hollow face;
Figure 6 represents in section a pulley with a concave or hollow face or
periphery produced by the new or improved machinery constituting the said
invention when the parts of the said machinery are in the positions represented in
Figure 6.
Figure 7 represents in elevation the arrangement of the said invention when the
rotating table and spindle carrying the pulley are supported on a compound
elide.
The same letters of reference indicate the same parts in the several figures of
the drawings.
We will first describe the arrangement Figures 1, 2, 3 and 4.
a is the bed of the machine on which work two slides marked respectively b
and the said slides having motion in planes at right angles to one another, being
operated by the respective screws 6', o' working in screw boxes on the undersides
of the slides as is well understood. The transverse slide carries an ordinary face.
milling cutter d having solid or inserted teeth and the longitudinal slide c carries
a revolving spindle e on which is fixed the pulley f to be finished or machined.
The vertical spindle e carrying the pulley f receives a slow rotary motion, the
said rotary motion being communicated to the pulley spindle e in the following
manner.
A pulley g' on the principal shaft g of the machine drives by means of the belt
or bend the pulley on the second and parallel shaft h. On the said shaft h
is a friction disc against the face of which the edge of a second adjustable
friction disc ¹ on a shaft k at right angles to the shaft h, bears (see Figures 1, 3
and 4) and receives rotary motion therefrom. On the end of the shaft k is a
worm gearing with a worm wheel on the shaft I, a worm on which shaft /
gears with the worm wheel el on the vertical spindle e. By sliding the adjustable
friction disc along the shaft k it may be made to bear against the driving friction
disc at a greater or less distance from the centre of the said disc and thereby
rotate the pulley fat a greater or less speed as desired.
The face milling cutter d is driven from the main shaft g through the pinion g³
which gears with the spur wheel m, on the opposite end of the shaft of which
is a second spur wheel m³ gearing with the teeth on the periphery d² of the face
milling cutter d.
When for any reason it is wished to stop the machine the handle n is turned
and operates through its spindle the lever n', link n³, slide n³ and belt fork n' so
as to throw the driving band or belt from the driving shaft (not shown) off the fast
pulley g on to the loose pulley 9³.
When it is wished to machine or finish a pulley so as to produce on its periphery
& crown or convex face the transverse slide 6 carrying the cutter head is adjusted
Bo as to bring the axis of the face milling cutter d in line with the vertical spindle e
or so as to bring the face milling cutter d into such a position that the vertical
spindle e is in a line situated between the axis of the face milling cutter and the
path of the cutters of the face milling cutter, the exact position depending on the
amount of convexity desired, the maximum convexity being obtained when
the spindle is in line with the axis of the face milling cutter and the minimum
convexity when the spindle e is in a line just within the path of the rotating
cutters.
Figures 1, 2, 3 and 4 represent the parts of the machine in position for
producing crown or convex faces on pulleys of. the character shown in the
drawings.
When it is desired to produce on the surfaces of pulleys straight faces, that' is
to say to make the peripheries truly cylindrical or approximately cylindrical as

page_text: represented in Figure 5A, the transverse slide b of the cutter head is adjusted so
as to bring the path of the rotating cutters in line with the vertical spindle e as
represented in Figure 5; and when it is desired to produce on the periphery of a
pulley a hollow or concave face as is represented in the pulley Figure 6ª the
transverse slide 6 of the face milling cutter is adjusted so as to throw the vertical
spindle e outside the line or path of the rotating cutters as is represented in
Figure 6.
:
In order to ensure that the centre of curvature of the periphery of the pulley,
when producing crown or hollow faced pulleys, shall be in the same line as the
middle of the pulley or in other words that the middle of the pulley in the case of
crown faced pulleys shall be of largest diameter and in the case of hollow faced
pulleys of smallest diameter, it is necessary that the middle line of the pulley
shall be in the same horizontal plane as the axis of the face milling cutter d and
for this reason the face milling cutter is made capable of vertical adjustment to
fit the machine to operate on pulleys of varying widths.
The vertical adjustment is effected as follows. A vertical screw the axis of
which is marked p works in a screw box on the inner side of a vertical slide
the guides of which are marked s', s carrying the face milling cutter. By turning
the screw p by means of the hand wheel q, in one or other direction, which acts
through the bevil pinion 9 and bevil wheel r, the vertical slides and with it the
face milling cutter d are raised or lowered.
In Figure 7 we have represented an arrangement of the said invention in which
the spindle e carrying the pulley is carried by a compound slide b, c the milling
cutter head being incapable of transverse or longitudinal motion, but we wish it.
to be understood that we do not limit ourselves to either this arrangement or that
first described as the same object may be effected by mounting the milling cutter
head on a compound horizontal slide, the pulley spindle e being fixed; or the pulley
spindle e may be carried by a single horizontal slide having a transverse motion the
milling cutter head being mounted on a single horizontal slide having a longi-
tudinal motion.
The spindle on which the pulley fin Figure 7 is fixed is slowly rotated by hand
worked mechanism and the handwheel q for operating the vertical slide s is fixed
directly on the operating screw p of the slide.
Although we have assumed the boring of the pulley to be machined or fiuished
to have been effected previous to its introduction into the machine constituting the
said invention yet we wish it to be understood that the new or improved machinery
hereinbefore described may be combined with a boring machine so as to effect the
two operations simultaneously.
The application of the said invention to machinery for finishing or machining
fly wheels and for other like purposes differs in no essential respect from its
application to machinery for finishing or machining metallic and non-metallic
pulleys as herein before described.
Having now particularly described and ascertained the nature of the said inven
tion and in what manner the same is to be performed we declare that we claim
as the said invention of "New or improved machinery for finishing or machining
the peripheries of pulleys and fly wheels and for other like purposes
,
First. In machinery for finishing or machining the peripheries of pulleys, fly
wheels and the like, the combination of the horizontal transverse slide b, carrying
the head of the face milling cutter d and its driving mechanism, with the horizontal
longitudinal slide c carrying the pulley spindle e substantially as and for the
purpose hereinbefore described and illustrated in Figures 1, 2, 3, 4, 5 and 6 of the
accompanying drawings.
.
Secondly. In machinery for finishing or machining the peripheries of pulleys
flywheels and the like, the combination with a rotating spindle supported upon and
carried by a compouud slide, of a fixed milling cutter head substantially as
herein before described and illustrated in Figure 7. of the accompanying drawings.

page_text: Thirdly. The combination with machinery for finishing or machining the
peripheries of pulleys, fly-wheels and the like of the kind claimed in the first and
second claims, of a vertical slides working on the horizontal transverse slide 6 or
on the fixed milling cutter head for raising or lowering the axis of the face
milling cutter substantially as and for the purpose herein before described and
illustrated in Figures 1, 2, 3, 4, 5, 6 and 7 of the accompanying drawings.
Fourthly. In machinery for finishing or machining the peripheries of pulleys,
fly wheels and the like, the combination with a stationary rotating spindle to which
the pulley or the like to be machined or finished is fixed, of a face milling cutter
mounted on a compound slide substantially as herein before described.
Dated the 24th day of June 1896.
TANGYES MACHINE TOOL CO. LIMITED,
W. J. PARKINS, Secretary.
A
TANGYES MACHINE TOOL CO. LIMITED,
W. J. PARKINS, Secretary.
JOHN
ON ANUIE.
TANGYES MACHINE TOOL CO. LIMITED,
W. J. PARKINS, Secretary.
JOHN TANGIE.
WILLIAM HENRY BAILEY.