Improvements in Springs for Carriages, Railway Rolling Stock, and other Vehicles.
Year: 1886

page_text: PROVISIONAL SPECIFICATION,
Improvements in Springs for Carriages, Railway Rolling Stock,
and other Vehicles.
We, JOSEPH MITCHELL, of Chippinghouse Road, Sheffield, Engineer, and WILLIAM
CODINGTON, of Harwood Street, Sheffield, in the County of York, Commission Agent,
do hereby declare the nature of our said invention for "IMPROVEMENTS IN SPRINGS
** to be as follows:-
FOR CARRIAGES, RAILWAY ROLLING STOCK & OTHER VEHICLES
This invention consists in the manufacture of plate or leaf springs in such a manner
as to obviate the necessity of putting the pin through the centre of the plates by which
they are considerably weakened.
In making one half or thereabouts the quantity of plates required to form the
spring are bossed in the centre in one direction & the others are bossed in the opposite
direction, so that when fitted a cavity is left in or near the centre of the plates, which
are then bent to a required camber.
In the place of the pin by which the ordinary plates are fastened, I construct a box
into which the bossed or corrugated portion of the spring fits, & which holds the
plates in a firm & secure position.
GARLICK & McGOWAN,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Springs for Carriages, Railway Rolling Stock,
and other Vehicles.
We, JOSEPH MITCHELL of Chippinghouse Road, Sheffield Engineer and WILLIAM
CODINGTON of Harwood Street Sheffield in the County of York Commission Agent do
hereby declare the nature of our said invention for IMPROVEMENTS IN SPRINGS FOR
CARRIAGES RAILWAY ROLLING STOCK AND OTHER VEHICLES" and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
This invention consists in the manufacture of plate or leaf springs in such a manner
as to obviate the necessity of putting the pin or bolt through the centre of the plates
and thereby weakening the spring as in the present system of manufacture.
In making, we take the required number of plates and boss them in the centre
forming a corrugation; one half or thereabouts being bossed in one direction and the
remainder being bossed in the opposite direction, so that when the plates are put
together in the form of a spring a cavity will be left at or about the centre thereof.
To hold the said plates in position we make a box in two parts formed to fit the
corrugation on the spring, one of the said parts being smaller than the other into
which it fits; holes being made at about the centre thereof to receive a pin or. bolt
which passing through the holes in the box and the cavity in the spring securely holds
the plates as desired.
Or, in place of the box above described two hoops may be used which are passed
over each end of the spring to the centre, the broad ends of the hoops fitting on either
side of the said spring and having holes for the bolt or pin to pass through,
The boxes may be inade of steel or other suitable metal.
The accompanying drawings illustrate our invention.
Fig. 1 is a side view in elevation shewing one half of the spring plates corrugated
in one direction and the remainder in the opposite direction.
Fig. 2 is an end view in elevation of box shewing Figs. 3 and 4 in position with
the bolt Fig. 5 which holds the springs plates and box securely together.
Fig. 6 is a plan of a similar box composed of two hoops which are placed over each
end of the spring to the centre and have holes through the side to recieve the bolt for
holding the box and spring plates firmly together.
Fig. 7 is a side view in elevation shewing box of, Fig. 6, composed of two hoops
and the bolt passing through the side.
Fig. 8 is a plan of the box or hoops in Fig. 6 shewing the position of the half hoops
before they are passed over the ends of the spring.
Figs. 9 and 10 represent another form of box in two parts of equal sizes which are
bossed top and bottom to recieve the corrugations of the spring these parts meet
in the centre of the spring and have also holes in each side for the bolt or pin to pass
through.

page_text: Fig. 11 is a side view in elevation of Figs. 9 & 10.
Fig. 12 is a front view in elevation of Figs. 9. 10 and 11 shewing the box fitted
over the spring. These boxes may be attached to any kind of spring."
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 :-
Firstly Improvements in springs made with leaves corrugated one portion in the
direction of the camber of the spring and the remainder in the opposite direction so
that when the spring is put together there is a space for the bolt or pin to pass
between the said corrugations.
Secondly: In the construction of a box made in two parts the one fitting into the
other as shewn in Figs. 2. 3. and 4.
Thirdly: In the construction of a hoop or binder in two parts with a bolt, rivet, or
other fixing passing between the corrugated leaves of the spring as shewn in Figs. 6.
7. 8. 9. 10. 11. and 12.
Fourthly: Improvements in springs for carriages, Railway rolling stock, and other
vehicles being as Firstly, Secondly, and Thirdly claimed described and illustrated by
the accompanying drawings.
GARLICK & MCGOWAN,
Agents for the Applicants.