Improvements in and relating to Means for Supporting or Mounting Work in Lathes and similar Machinery for Making Parts of Velocipedes and the like.
Year: 1895

page_text: Date of Application, 4th Mar., 1895
•
Complete Specification Left, 4th D.o., 1895-Accepted, 25th Jan. 1896
PROVISIONAL SPECIFICATION.
Improvements in and relating to Means for Supporting or Mounting
Work in Lathes and similar Machinery for Making Parts of
Velocipedes and the like.
We, THE TRIUMPH CYCLE COMPANY, LIMITED, Cycle Manufacturers, and
CHARLES WALTER HATHAWAY, Engineer, both of Earl's Court, Much Park
Street, Coventry in the County of Warwick, do hereby declare the nature of this
invention to be as follows:-
This invention relates to machinery to be employed in making certain parts of
velocipedes and the like, applicable also to other similar purposes, and has for its
objects, to secure greater accuracy in the work produced and to save time in
producing it.
On to the mandrel of an ordinary lathe we screw or otherwise fit a hollow
cylinder or chuck the interior of which is tapered and is larger at the front than at
the back. On to the bed of the lathe we fit a standard or plate at right angles to
the length thereof and in such a way that it may slide lengthwise thereon. In this
standard we mount a ring in an antifriction bearing, preferably of the kind
commonly known as a ball bearing. The ring is set in aligument with the mandrel
and its interior is tapered or otherwise suitably shaped, the larger end of the
aperture being towards the mandrel. Both the chuck and the ring may be
mounted in sockets so that other chucks and other rings of various dimensions may
be interchanged as required. The standard is pressed in the direction of the
mandrel by a cord or the like secured to the standard, passing over a vertical
pulley arranged in the direction of the mandrel and carrying a weight at its other
end; or the pressure may be exerted by a suitable spring or in any other convenient
A stop may be provided to prevent the standard travelling too far.
manner.
A lever, connected at one end to the bed, and at or about the centre to the
standard, and provided with a handle at the other end, or other suitable means,
may be employed to draw the standard away from the mandrel when required.
The invention is employed in operating on cylindrical and like objects. For
example, supposing the turned front wheel hub of a rear driving safety bicycle is
to have the ball races lapped true after hardening, the standard is drawn away
from the mandrel so that at oue end of the hub may be inserted in the chuck and
the other in the ring, and on the standard being released the chuck and ring
approach one another and the hub is gripped and held concentrically between the
tapered surfaces. On the machinery being started the hub and ring rotate with
the chuck and mandrel, the friction between the hub and the ring being greater
than between the ring and standard owing to the fit of the hub in the ring and the
antifriction nature of the bearing. The ball race exposed through the ring may
then be lapped in any convenient mauner. When that race is finished the standard
8 pulled back, the hub reversed, the standard returned and the other ball race
created in a similar manner. Hub castings may be bored when carried as above
lescribed and other work of a similar nature carried out with accuracy and
lespatch. The tapering of the chuck is made sufficiently gradual to ensure a grip
that will overcome the normal resistances to the revolution of the hub or other
article while being operated upon.

page_text: The apparatus may be fitted up on a suitable stand other than a lathe if desired,
when it would be provided with driving gear and other parts obvivůsly necessary
for the purpose.
... 1
P
1005
W. B. MAXFIELD,
Applicants' Agent.
Improvements in and relating to Means for Supporting or Mounting
Work in Lathes and similar Machinery for Making Parts of
Velocipedes and the like.
We, THE TRIUMPH CYOLE COMPANY LIMITED, Cycle Manufacturers, and
CHARLES WALTER HATHAWAY, Engineer, both of Earls Court, Much Park
Street, Coventry in the County of Warwick 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 machinery to be employed in making certain parts of
velocipedes and the like applicable also to other similar purposes and has for its
objecta, to secure greater accuracy in the work produced and to save time in
producing it.
And in order that our invention may be well understood we append drawings
showing one form of our apparatus constructed in the mauner which we prefer to
adopt, but we do not confine ourselves thereto as modifications may be made without
exceeding the limits of our invention.
Figure is an elevation partly in section, of the said apparatus viewed from the
rear.
Figure 11 is a transverse section on the line X-X in Figure I but drawn to an
enlarged scale.
Like numerals refer to like parts throughout the several views.
On to the mandrel 2 of au ordinary latho we screw or otherwise fit a hollow
oylinder or chuck 3, the interior of which is tapered and is larger at the front than
at the back, as shown. On to the bed 4 of the lathe we fit a standard or plate 5 at
right angles to the length thereof and in such a way that it may slide lengthwise
thereon. To provide for the said lengthwise movement, we form the standard 5
with a baso or foot 6 and a bed 7, which hed 7 is adapted to bo bolted to the lathe
bed 4 and in which bed 7 the buse 6 is adapted to slide without oscillation in any
convenient well-known manner. In this standard 5 we mount a ring 8 in an
antifriction bearing 20, preferably of the kind generally known as a laterally
adjustable, double ball bearing. The ring 8 is set in alignment with the mandrel 2
and its interior is tapered or otherwise suitably shaped, the larger end of the
aperture being towards the mandrel as shown.
Instead of mounting the ring 8 directly in the bearing of the standard 5 it may
be turned slightly taper on ita exterior (so as to be larger at the end nearer the
mandrel than at the other end) and be mounted in a socket or ring 9 having a
correspondingly tapered interior, as shown; a portion of the exterior of the
ring 8 between the two ends thereof may conveniently be turned of slightly reduced
diameter so that the said ring engages with the socket 9 by the end parts only.
By these means other rings of similar exterior but differing as to their interiors
may be interchanged as desired.
And the chuck 3 may be constructed and mounted in a similar manner; or it
may be mounted by providing the back thereof with an axial taper shank adapted
to fit into a correspondingly tapered axial hole in the end of the mandrel; and iu
this case it is convenient to mount a nut on the exterior, sorewed surface of the

page_text: mandrel, so that by screwing the said nut in the direction of the standard it will
bear against the back of the chuck and extract the shank from the mandrel.
Instead of making the interiors of the chuck 3 and ring 8 each with a single taper,
they may be made to decrease in diametor by being stepped but the surfaces of the
steps are tapered.
The standard 5 is pressed in the direction of the mandrel 2 by a cord or the
like 10 secured to the standard, passing over a vertical pulley 11 attached to
the head stock 12 or otherwise arranged in the direction of the mandrel and
carrying a suitable weight 13 at its other ond; or the pressure may be exerted by
a suitable spring or in any other convenient manner. A stop may be provided to
prevent the standard travelling too far, if required. A lever 14 connected at one
end to the bed 7, preferably by a link 15, and pivotted at or about the centre
to the standard 5 and provided with a handle 16 at the other end, or other
suitable means, may be employed to draw the standard away from the mandrel
when required.
The invention is employed when operating on cylindrical or like objects. For
example, supposing the front wheel hub 17 (not shown in Figure 11) of a rear
driving safety bicycle is to have the ball races 18, 19 lapped true after hardening,
the standard 5 is drawn away from the mandrel 2 by the lever 14 or the like so
that one end of the hub 17 may be inserted in the chuck 3 and the other in the
ring 8 and on the standard being released the chuck and ring approach one another
and the hub is gripped and hold concentrically between their tapered interior
surfaces as shown. On the machinery being started the hub 17 and the ring 8
rotate with the chuck 3 and mandrel 2, the friction between the hub and ring being
greater than that between the ring and standard owing to the fit of the hub in the
ring and the antifriction nature of the bearing. The ball race 18 exposed through
the ring 8 may then be lapped in any convenient manner.
When that race is
finished the standard is pulled back, the hub reversed, the standard returned, and
the other ball race (19) treatel in a similar manner. Hub castings may be bored
when carried as above described and other work of a more or less similar unture
such as grinding, boring, drilling, tapping and centroing in cycle work, and
general engineering, may be carried out with accuracy and dispatch. The
tapering of the chuck 3 is made sufficiently gradual to ensure a grip that will
overcome the normal resistance to the revolution of the hub or other article whilo
being operated upon.
The apparatus may be fitted up on a suitable stand other than a lathe if desired,
when it would be provided with driving gear and other parts obviously necessary
for the purpose.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In menus for supporting or mounting work in lathes and similar machinery for
making or operating on cylindrical or like parts of velocipedes, and like object,
the combination of a hollow cylinder or chuck, having a tapered interior, fitted
(directly or indirectly by means of a socket), to the mandrel; a standard adapted
to alide lengthwise relatively to the bed of the lathe or the like; a ring having a
tapered interior, adapted to rotate (directly, or indirectly by means of a socket,) in
the said standard; a cord, pulley and weight or the like menus adapted to press
the ring in the direction of the chuck; and a lever or the like means adapted to
withdraw the ring from the chuck; the chuck and ring being adapted to hold the
work between their interior surfaces, and the chuck being adapted to grip the work
so that it rotates therewith, substantially as herein described for the purpose set
forth.
2. lu means for supporting or mounting work in lathes and similar machinery for
making or operating on cylindrical or like parts of velocipedes and like objects,-
the combination with the mandrel and bed of a latho or similar machine of, a chuck

page_text: Buch as 3, a standard such as 5, and a ring such as 8, all combined, arranged and
⚫operating substantially as and for the purpose set forth.
Dated this 3rd day of December 1895.
W. BESTWICK MAXFIELD,
Registered Patent Agent,
19 Bowling Green Street, Leicester, Applicants' Agent.