Improvements in Machinery for Cutting off Pieces or Lengths from Cold Metal Bars, principally adapted for Nuts, but which may be used for other purposes.
Year: 1898

page_text: Date of Application, 19th Feb., 1898
Complete Specification Left, 15th Nov., 1898-Accepted, 31st Dec., 1898
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Cutting off Pieces or Lengths from
Cold Metal Bars, principally adapted for Nuts, but which may be
used for other purposes.
We, JAMES EDWARD CARTER and SAM AYRTON WRIGHT, both of Corporation
Street, Halifax, in the County of York, Nut and Bolt Manufacturers, do hereby
declare the nature of this invention to be as follows:-
The primary object of our invention is to cut off lengths from cold metal bars,
the said pieces cut off being principally intended for nuts, but the apparatus
may be employed for cutting off pieces or lengths of bars for other purposes.
According to our invention we employ one or more suitable headstocks, having
one or more hollow spindles provided with universal gripping chucks to grip
and seize hold of the bars intending to be cut. These bars which may occupy
either a vertical or horizontal position are caused to revolve in contact with
revolving saws, the rotary motion of the two objects being opposite to each
other. Suitable feed motions are arranged for feeding the bars forward to
the saws, and when the saws have severed the bar or bars the feed mechanism
(which may be of various construction) is automatically set into motion so as to
place the bars once again into contact with the saws. We also employ stop
pieces against which the ends of the bars abut for determining the length to
be cut off. These stop pieces are adjustable so as to determine and regulate
the length of the piece to be cut off.
.
By the employment of rotary saws and revolving bars, pieces can be cut
off perfectly true, whilst the saw or saws may composed of thin metal so that
little waste is made in the material.
Dated this 18th day of February 1898.
COMPLETE SPECIFICATION.
Improvements in Machinery for Cutting off Pieces or Lengths from
Cold Metal Bars, principally adapted for Nuts, but which may be
used for other purposes.
We, JAMES EDWARD CARTER and SAM AYRTON WRIGHT, both of Corporation
Street, Halifax, in the County of York, Nut and Bolt Manufacturers, do hereby

page_text: r
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 primary object of our invention is to cut off lengths from cold metal
bars, the said pieces cut off being principally intended for nuts, but the apparatus
may be employed for cutting off pieces or lengths of bars for other purposes.
According to our invention, we employ one or more suitable headstocks, having
one or more hollow spindles provided with universal gripping chucks to grip
and seize hold of the bars intending, to be cut. These bars which may occupy
either a vertical or horizontal position are caused to revolve in contact with
revolving saws, the rotary motion of the two objects being opposite to each
other. Suitable feed motions are arranged for feeding the bars forward to the
saws, and when the saws have severed the bar or bars the feed mechanism is
set into motion so as to place the bars once again into contact with the saws.
We also employ stop-pieces against which the ends of the bars abut for deter-
mining the length to be cut off. These stop-pieces are adjustable so as ito
determine and regulate the length of the piece to be cut off.
By the employment of rotary saws and revolving bars, pieces can be cut off
perfectly true, whilst the saw or saws may be composed of thin metal, so that
little waste is made in the material.
In order that our said invention may be fully understood, reference is here-
after had to the annexed sheet of drawings forming a part of this specification,
in which;
Fig. is front elevation of our improved machine for cutting off pieces or
lengths from cold metal bars, and
Fig. 2 is plan thereof.
Fig. 3 is a transverse section of the machine.
Fig. 4 is enlarged front elevation partly in section of the moveable headstock
and parts, and
Fig. 5 is transverse section of same.
Referring to the drawings, letter a represents the framework of the machine
in the table a¹, of which are V grooved ways b, 61, wherein are dovetailed and
adapted to slide endwise the feet of two headstocks e, e', forming bearings in
which are journalled hollow spindles d, d, provided at their inner ends with
universal gripping chucks e, e¹. On the hollow spindles d, d, are mounted
worm wheels f, f', into which gear worms g, gl, on 'transverse shafts h, h³, sup-
ported in bearings at each side of the table. The said shafts h, h¹, receive
motion through the train of wheels i, ', respectively, from a spur wheel 2, on
the main driving shaft of the machine. The worms g, g', are loose on their
shafts and are thrown into and out of action, at will, by sliding clutches k, k³,
secured rotatively to shafts h, h, by keys entering longitudinal grooves or ways
in said shafts and which are slided into and out of gear with opposing clutch
faces on the worms by means of clutch forks, Letter m represents a fixed
headstock in bearings in which is journalled a spindle or shaft on whose opposite
ends are secured circular saws n, n¹. Motion is imparted to the circular saws
by worm and worm wheel from the main shaft j.
The metal bars from which short pieces or lengths are to be cut are repre-
sented at o, o. These bars are passed through the hollow spindles d, d, and
forced against adjustable stop-pieces p, p, carried in brackets 2, 3, bolted to
the respective headstocks c, c, such stop-picces determining the lengths of metal
to be cut or sawn off at each operation, and then the chucks e, el, are moved
inwardly to grip the bars and hold them rigid centrally of the hollow spindles
and so as to rotate therewith. Against the outer ends of each bar of metal
press feed rods 9, q', carried by arms 92, 93, mounted and adapted to slide
laterally on angular spindles 1, 2, secured to the headstocks c, c¹. To the

page_text: arms 2, 3, is secured one end of cords or wires r, r, which pass over guide
pulleys 2,3, and have suspended from their opposite ends weights,, which
after a piece of metal has been sawn off and the chucks released, draw the arms
and feed rods inwardly and thus automatically feed the metal bars o, o¹, for-
ward into abutment again with the stop-pieces p, p', in readiness for cutting
off another piece or length therefrom.
The headstocks c, el arc moved or forced toward the circular saws, to bring
the metal bars into contact therewith by means of the weighted levers u, u¹,
whose arms ², ², abut against studs or projections u³, u, on the undersides
of the feet of the headstock and by the gravity action of the weights, thus force
said headstocks up to the saws and keep the metal bars in contact with the
said saws until they are cut completely through. The headstocks are released
and sufficient traverse allowed for the saws to pass the centres of the metal
bars, by turning the screws s, s, by hand which moves the nuts the requisite
distance away from the studs ³ ³ for said purpose.
At the time this happens, adjustable fingers v, v¹, on clutch fork rods 2, 23,
are engaged by adjustable stop-pieces on rods w, w¹, secured to the head-
stocks c, c, as is shewn at the left hand of Fig. 2, and said clutch fork rods
are thus drawn towards the headstocks and place the clutches x, x¹, secured
rotatively to the shafts h, h, into gear with opposing clutches on the faces of
pinions,, loose on said shafts h, h¹, whereby rotary motion is given to said
pinions and communicated through carrier pinions y, ¹, to pinions y², y³, on
the screws s, s¹, by which means the headstocks c, c¹, are quickly withdrawn or
returned to their original position as shewn at the right hand of Fig. 2 to
place the metal bars clear of the circular saws and allow of same being released
and fed forward to present another length to be cut off, the clutches k, k¹,
being meanwhile slided out of gear with the wormis g, g', to stop the rotation
of the hollow spindles d, d. This automatic return movement again places
the nuts s in abutment with the studs 3, 4, and thus hold the headstocks until
again ready for moving up to the saws. The pieces or lengths of metal as
they are sawn off, fall on to the table a or into a receptacle. The bars o, o¹,
are rotated in a contrary direction to the saws when cutting.
By rotating cold bars of metal in contact with rotating circular saws as herein-
before set forth, the predetermined pieces or lengths of metal are cut off perfectly
true which is not the case in machines in which the bars are stationary as
heretofore.
We are also enabled to use thinner metal in making the saws, and they are
stiffer, do not require to be sharpened so often, and cut less metal to waste.
The machine shewn in the drawings is a compound machine, the moveable
headstocks and parts connected therewith being separate and distinct from each
other and operating quite independently one of the other. The machine with
a single headstock and circular saw may be used in some cases if preferred.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that
what we claim is:-
-
1, In machines for cutting off pieces or lengths from cold bars of metal, tho
combination with a rotating circular saw, of a hollow spindle journalled in
bearings in a moveable headstock, said spindle being provided with universal
gripping chucks for gripping the bars of metal passed through the spindle
and adapted to be rotated to rotate said bar of metal in contact with the saw,
substantially as herein set forth and for purposes described.
2, In machines for cutting off pieces or lengths from cold metal bars, the means
for rotating and stopping the rotation of the hollow spindle through which the
bar to be sawn is passed and gripped centrally thereof, the feed motion for
automatically feeding the bar forward after each length is sawn off, adjustable

page_text: stop pieces for determining the length of metal to be sawn off, and the means
for giving a quick return movement to the headstock after the metal bar has
been sawn through, all substantially as herein shewn and described.
Dated this 14th day of November 1898
TASKER & CROSSLEY,
Patent Agents, Halifax,
. Agents for Applicants.