IMPROVE- MENTS IN PORTABLE AND TRACTION ENGINES
Year: 1878

page_text: LETTERS PATENT to Nathaniel Clayton and Joseph Shuttleworth, both of
Lincoln, in the County of Lincoln, Engineers, for the Invention of "IMPROVE-
MENTS IN PORTABLE AND TRACTION ENGINES."
Sealed the 10th December 1878, and dated the 6th July 1878.
PROVISIONAL SPECIFICATION left by the said Nathaniel Clayton and
Joseph Shuttleworth at the Office of the Commissioners of Patents on the
6th July 1878.
NATHANIEL CLAYTON and JOSEPH SHUTTLEWORTH, both of Lincoln, in the
County of Lincoln, Engineers. "IMPROVEMENTS IN PORTABLE AND TRACTION
ENGINES."
Our Invention relating to portable and traction engines has reference to carriages
and brackets for carrying the crank shafts of the same.
In carrying out our Invention the bracket is firmly bolted on to the boiler, and
on the said bracket slides the carriage, which is secured from lateral movement by
a tenon and from vertical movement by flat-sided bolts, which pass through the
sides of the mortice or groove in the bracket and tightly fit the respective bolt
holes, but where the bolts pass through the tenon the bolt holes are made longer
than the width or diameter of the bolt, thus allowing the carriage to slide longi-
tudinally on the bracket as the boiler expands or contracts, while at the same time
the distance from the cylinder to the centre of the shaft is preserved by a stay in
the usual manner.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Nathaniel Clayton and Joseph Shuttleworth in the Great Seal Patent
Office on the 31st December 1878.
NATHANIEL CLAYTON and JOSEPH SHUTTLEWORTH, both of Lincoln, in the
County of Lincoln, Engineers. "IMPROVEMENTS IN PORTABLE AND TRACTION
ENGINES."
Our said Invention relating to portable and traction engines has reference to
carriages and brackets for carrying the crank shafts of the same.
In carrying out our said Invention the bracket is firmly bolted on to the boiler,
and on the said bracket is mounted the carriage, which is secured from lateral
movement by a tenon fitted in a mortice or groove in the bracket and from vertical
movement by flat-sided bolts, which pass through the tenon and the sides of the
mortice or groove in the bracket. These bolts tightly fit the respective bolt holes
except at the part where the bolts pass through the tenon, at which place the bolt
holes are made longer than the width or diameter of the bolts, thus allowing the
carriage to slide longitudinally on the bracket as the boiler expands or contracts,
whilst at the same time the distance from the cylinder to the centre of the shaft is
preserved by a stay in the usual manner.
And in order that our said Invention may be fully understood we shall now
proceed more particularly to describe the same, and for that purpose shall refer to
the several Figures on the annexed Sheet of Drawings, the same letters of reference
indicating corresponding parts in both the Figures.
Figure 1 of the accompanying Drawings represents a transverse section of a
portion of a portable engine or traction engine with our said Invention applied
thereto, and Figure 2 is a part longitudinal section and part side elevation of the
same, corresponding to Figure 1.
A is the bracket which is securely bolted to the boiler B. On this bracket is
mounted the carriage C for the crank shaft, which carriage is prevented from
moving laterally by a tenon a fitted in a mortice or groove in the bracket, and is
prevented from moving vertically by bolts D, having a flat side b, which pass
through the tenon and the sides of the mortice or groove in the bracket. These
bolts tightly fit the respective bolt holes except at the part where they pass
through the tenon, at which place the bolt holes are made of greater diameter than
the bolts, as shewn most clearly in Figure 2, in order to admit of the carriage C
sliding longitudinally on the bracket A as the boiler B expands or contracts, whilst
at the same time the distance from the cylinder to the centre of the shaft is
maintained by a stay E in the usual manner.
Having now described and particularly ascertained the nature of our said Inven-
tion, and the manner in which the same is or may be used or carried into effect,
we would observe in conclusion, that what we consider to be novel and original
and therefore claim as the Invention secured to us by the herein-before in part
recited Letters Patent is, the employment in portable and traction engines of the
peculiar arrangement of bracket and sliding carriage, substantially as and for the
purpose herein-before described, and as illustrated by the accompanying Drawings.
In witness whereof, we, the said Nathaniel Clayton and Joseph Shuttleworth,
have to this our Specification set our hands and seals, the Thirty-first day
of December, One thousand eight hundred and seventy-eight.