IMPROVEMENTS IN LATHES for Devon FOR TURNING AND FACING TYRES, RINGS, AND OTHER ANALOGOUS ARTICLES
Year: 1873

page_text: LETTERS PATENT to Massoy Bromley, of Stratford, in the County of
Essex, Engineer, for the Invention of "IMPROVEMENTS IN LATHES for
Devon 11223
PROVISIONAL SPECIFICATION left by the said Massey Bromley at
the Office of the Commissioners of Patents, with his Petition, on
the 22nd November 1873.
I, MASSEY BROMLEY, of Stratford, in the County of Essex, Engineer,
do hereby declare the nature of thic said Invention for "IMPROVEMENTS
IN LATHES FOR TURNING AND FACING TYRES, RINGS, AND OTHER ANALOGOUS
ARTICLES," to be as follows:-
This Invention relates to arrangements in the working parts of lathes
in which two articles or objects of different sizes or diameters can be
operated upon by separate tools or cutters at the same time, and consists
in making the chuck plate used in ordinary lathes in two parts, au
exterior ring and an interior disc. These two parts of the chuck plate

page_text: can be constructed so that one will drive the other, or they may be
driven independently of one another and at different speeds.
One set of pullies or cone wheels, say for the exterior ring, is carried
by a sleeve upon the shaft of the holder for the interior disc, and their
rotation is governed by immediate and other gearing actuated by a
cone pulley and band from an overhead rigger or in other suitable
manner.
The tools or cutters are each mounted upon separate traversing beds,
and they are adjustable by screw or other mechanism to suit their
positions, whether for face or edge cutting. The bed plate for the
cutters is preferably detached from the other bed plate, but it may be in
a piece with it if desired.
The Invention is specially intended for turning and facing up tyres
of railway wheels, but it is applicable to the turning and facing up of
other rings and articles capable of being fixed on the chuck plates.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Massey Bromley in the Great Seal Patent
Office on the 22nd May 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MASSEY
BROMLEY, of Stratford, in the County of Essex, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of November, in the
year of our Lord One thousand eight hundred and seventy-three, in the
thirty-seventh year of Her reign, did, for Herself, Her heirs and succes-
sors give and grant unto me, the said Massey Bromley, Her special
licence that I, the said Massey Bromley, my executors, adminis-
trators, and assigns, or such others as I, the said Massey Bromley, my
executors, administrators, and assigns, should at any time agree with,
and no others, from time to time, and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, the

page_text: Channel Islands, and Isle of Man, an Invention for, "IMPROVEMENTS IN
LATHES FOR TURNING AND FACING TYRES, RINGS, AND OTHER ANALOGOUS,
ARTICLES," upon the condition (amongst others) that I, the said Massey
Bromley, my executors or administrators, by an instrument in writing
under, my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed.
in the Great Seal Patent Office within six, calendar months next and
immediately after the date of the said Letters Patent..
NOW KNOW YE, that I, the said Massey Bromley, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by
the following statement thereof, reference being had to the Drawings
hereunto annexed, that is to say:-
-
This Invention relates to arrangments in the working parts of lathes.
in which two articles or objects of different sizes or diameters can be
operated upon by separate tools or cutters at the same time, and consists:
in making the chuck plate used in ordinary lathes in two parts, an
exterior ring and an interior disc. These two parts of the chuck plate:
are constructed or arranged so that one will drive the other, or they may
be driven independently of one another and at different speeds..
One set of pulleys or cone wheels, say for the exterior ring, is carried.
by a sleeve upon the shaft of the holder for the interior disc, and their
rotation is governed by intermediate and other gearing actuated by a
cone pulley and band from an overhead rigger or in other suitable
manner.
The tools or cutters are each mounted upon separate traversing beds,
and they are adjustable by screw or other mechanism to suit their
positions, whether for face or edge cutting.. The bed plate for the
cutters is preferably detached from the other bed plate, but it may be in
a piece with it if desired.
My Invention will be well understood on reference to the accom-
panying Sheets of Drawings, in which Figure 1 represents a side
elevation of what is commonly known as a facing lathe with the chuck
plate partly in section; Figure 2 shows the lathe as it appears when

page_text: looking on the back of the lathe head; Figure 3 is a plan, and Figure 4,
a view looking on to the face of the chuck or face plate.
The exterior ring A of the chuck plate revolves round the interior
disc B, the mandril of which carries a cone pulley C and pinion D on a
sleeve. The pinion D gears into the spur wheel E upon a sleeve F,
this sleeve also carrying the pinion G, which gears into the spur
wheel H keyed upon the sleeve of the exterior ring A, and so driving
the exterior ring A through the back gear E and G, in the manner well
known, the cone or speed pulley C and pinion D under these circum-
stances running loose upon the mandril B², but when a quicker speed of
the exterior ring is required the spur wheel E and pinion G are thrown
out gear with the pinion D and wheel H; the cone or speed pulley
is then secured by a clip or bolt to the wheel H driving the exterior
ring, and rotates with it at the speed required, which is of course
governed by the step on the cone pulley C, on which the driving strap
is caused to take to suit the diameter or nature of the article on the
exterior ring. The sleeve F carrying the spur wheel E and pinion G
also carries another pinion I capable of taking into gear with the spur
wheel J on the shaft K, it having an end-on motion for that purpose
and supported in bearings on the lathe head. This shaft at its forward
end carries a pinion L, which in its turn gears into the internal teeth of
the exterior ring A, and by which the exterior ring is driven. By this
means the exterior ring can be driven at a much slower speed than the
interior disc to suit the larger diameter of the work it will take, both
revolving, but independently of one another, or they may revolve at the
same speed by being locked together in any well-known way.
The inner disc B is driven in the following manner :-A separate
cone pulley C¹ and shaft B¹ is fitted in bearings at the opposite side to
that which carries the gearing driving the exterior ring, which pulley is
driven by a strap from overhead or otherwise. The shaft B¹ carries at
its back end a wheel D¹ taking into an intermediate wheel E¹ on a stud
at the back of the lathe head, this latter wheel E' in its turn gears into
another wheel F¹ keyed on the back end of the mandril, while the inner
disc B is fast on the front end, so that it is driven direct through the
mandril by the wheels and cone pulley as described,
When a slower speed is required for the interior disc B the wheel G¹
and pinion H¹ on the back motion shaft I' are thrown into gear with the

page_text: wheel J¹ and pinion K' on the shaft B₁, the back motion shaft I being
carried in eccentric bearings or otherwise for that purpose.
The cutting tools are carried in the rests N supported on standards P
resting on a bed plate Q running across the front of the lathe, one rest
and standard being for the inner disc, and the other for the outer ring.
The crane R fitted at the back of the lathe head is for lifting the work
into and out of the lathe. The bed plate Q is fitted with traversing
screws S, S, to give the necessary movement to the standards P,
saddles P¹, and rests N carrying the tools, also with racks T, T, and
pinions U, U, the latter being actuated by worms V, V, and worm
wheels W, W, to adjust the standards and slide rests further from or
nearer to the face plates to suit the work that may be upon them.
X, X, are the dogs on the exterior ring, and Y, Y, those on the interior
disc fitted with screws to nip or bite the work placed in them in the
usual manner.
Figures 5, 6, 7, and 8 show my Invention as adapted to an ordinary
boring and turning lathe, and is fitted with a long bed Q with two
saddles P1, P¹, fitted with slide rests N to travel upon it in the usual
manner, the longitudinal motion of these saddles being obtained by the
long screws a, a, fitted on either side of the bed Q, one of which screws
is driven by gearing in connection with a spur wheel on the end of the
sleeve or cone pulley C, and the other by gearing in connection with a
similar wheel c on the end of the mandril B³. The traversing motion of
the slide rests across the chuck plate, being made self-acting by suitable
friction clutches being fitted, which are actuated by the screws a, a, the
slide rests will also swivel and bore or turn to any angle. The exterior
ring A. is driven in a similar manner to that shewn in the facing lathe,
but the extra pinion I is in this case omitted and the pinion G made to
do duty for it. This is accomplished by sliding the pinion G along on
the sleeve F and causing it to take into gear with the spur wheel J on
the treble gear shaft K, and so driving the exterior ring A. by the
pinion L taking into the internal teeth upon it as before. This lathe is
also adapted for shaping links and other work where a complete revo-
lution of the exterior ring is not required.
On reference to Figure 5 it will be seen that the pinion D can take
into an intermediate wheel e carried on an excentric stud fat the book

page_text: of the lathe head, the wheel e gearing into a wheel 9 on a shaft h, which
carries at its fore end a slotted crank i. This crank carries a stud and
one end of a connecting rod j, while its other end is attached to an
adjustable stud k on the exterior ring of the face or chuck plate. It
will be plainly seen that the rotation of the crank i will impart through
the connecting rod j a reciprocating rotatory motion to the chuck
plate, the amount of motion depending upon the position of the studs
in the crank i and chuck plate.
When the reciprocating motion is not required the connecting rod j'
is disconnected and the wheel e is thrown out of gear, it being fitted on
an eccentric stud for that purpose. The interior disc in this lathe is
driven by a second cone pulley and a spur wheel, the pinion of which is
carried direct on the back end of the mandril, while the interior disc is
on the front end the mandril, being extended for that purpose. By this
arrangement the wheels D', E', and F¹ as used in the facing lathe are
dispensed with, it being distinctly seen in both the lathes that I have
shown that the exterior ring and the interior disc have each a separate
speed or cone pulley, and the necessary wheels by which each can be
driven at the same or different speeds according to the nature of the
work upon them.
And having now described the nature of my said Invention of
improvements in lathes and the manner of operating the same for turning
and facing tyres, rings, and other analogous articles, I declare that I
claim,--
Firstly. The combination of appliances and their method of action, as
set forth and shown in Figures 1 to 4 of the annexed Drawings, whereby
two articles or objects, such as tyres, rings, or analogous-shaped articles
of different sizes or diameters can be operated upon at the same time
by different tools or cutters in the same lathe.
Secondly. I claim the combination of appliances and the manner of
operating them, for the purposes set forth, in or by which changes of
speed and of power can be given to the inner or the outer face plate at
the will of an attendant.
Thirdly. I claim the modified arrangement of mechanism referred to
with reference to Figures 5 to 8 of the Drawings annexed, in or by.

page_text: which two bodies, such as tyres, rings, or analogous-shaped articles of
different sizes can be operated upon at the same time by different tools
or cutters.
In witness whereof, I, the said Massey Bromley, have hereunto set
my hand and seal, this Twenty-first day of May One thousand
eight hundred and seventy-four.
MASSEY BROMLEY. (L.S.)