IMPROVEMENTS IN MACHINES FOR STRAIGHTENING RAILWAY RAILS
Year: 1876

page_text: LETTERS PATENT to Charles Davy, of the Park Iron Works, Sheffield, in the
County of York, for the Invention of IMPROVEMENTS IN MACHINES FOR
STRAIGHTENING RAILWAY RAILS."
"
Sealed the 15th May 1877, and dated the 30th November 1876.
PROVISIONAL SPECIFICATION left by the said Charles Davy at the Office
of the Commissioners of Patents on the 30th November 1876.
CHARLES DAVY, of the Park Iron Works, Sheffield, in the County of York. " IM-
PROVEMENTS IN MACHINES FOR STRAIGHTENING RAILWAY RAILS."
My Invention relates to machinery for straightening railway rails, and consists
in the combination of a pair of levers and their connecting rods with a single crank
shaft, or a single cam or eccentric, for giving motion to the said levers for
straightening the rail.
According to my Invention the cam or crank shaft which receives its motion
through spur wheels driven by an engine fixed to the frame of the machine or other
motor is placed between the two levers, which carry jaws that operate on the rail,
and the crank shaft is connected with the said levers by rods provided with
adjustable clips or straps which serve to draw back the levers after acting on the
rails, and to take up any play in case of wear.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Charles Davy in the Great Seal Patent Office on the 30th May 1877.
CHARLES DAVY, of the Park Iron Works, Sheffield, in the County of York. “IM-
PROVEMENTS IN MACHINES FOR STRAIGHTENING RAILWAY RAILS."
My Invention relates to machinery for straightening railway rails, and consists
in the combination of a pair of levers and their connecting rods with a single crank
shaft, or a single cam or eccentric, for giving motion to the said levers for straighten-
ing the rail.
According to my Invention the cam or crank shaft which receives its motion
through spar wheels driven by an engine fixed to the frame of the machine or other

page_text: Figures 1 and 2 are front and side elevations of my improved rail straightening
machine complete with steam engine attached.
Figures 3 and 4 show separately in plan and elevation the two levers and their
connecting rods and attachments.
'
A, A, are the two levers, each pivoted at B on a pin or bolt mounted in the
framing of the machine; the levers have steel faces or jaws C to act on the rail to
be straightened, which runs on rollers D mounted in the bed of the machine during
the operation of straightening; the levers are forked at A¹ to receive the ends of
their respective connecting rods E, which are jointed thereto by a pin or bolt; the
rods E connect the levers with the crank F on the shaft C, the connection being
made in the following way, see Figures 3 and 4-The end of each rod E embraces
rather less than half the circumference of the crank F, and is extended laterally in
the form of a semi-cylinder and provided with flanges H, between which and the
rod at either side of the latter are straps I which embrace the semi-cylindrical
extensions of both rods E and clasp them upon the crank; the straps I are made in
two halves, united by bolts and nuts with distance pieces K inserted between them.
By substituting smaller ones the straps may be tightened up in case of wear.
crank shaft G has a spur wheel L keyed on it, with which gears a pinion M on a
shaft N driven by the steam engine P or otherwise; O, fly wheel.
The
Instead of a crank Fit may be an eccentric or cam, the attachment of the con-
necting rods being similar or slightly modified as required.
Having described the nature of my Invention, and the manner of performing
the same, I declare that what I claim as my Invention to be protected by the
herein-before in part recited Letters Patent is, in a rail straightening machine the
combination with a single crank, cam, or eccentric of the two levers having steel
faced jaws to act on the rail, the levers being connected to and actuated by the
crank, cam, or eccentric through rods and straps, substantially as shown and
described.
In witness whereof, I, the said Charles Davy, have hereunto set my hand
and seal, this Twenty-sixth day of May, in the year of our Lord One
thousand eight hundred and seventy-seven.
CHARLES DAVY. (L.S.)