An Improved Form of Laminated Plate Spring and Spring Plate for the Road Wheels and Frames of Locomotive Engines, Railroad and Common Road Vehicles, and for other purposes.
Year: 1892

page_text: Date of Application, 22nd Apr., 1892
Complete Specification Left, 23rd Jan., 1893-Accepted, 4th Mar., 1893
PROVISIONAL SPECIFICATION.
An Improved Form of Laminated Plate Spring and Spring Plate for
the Road Wheels and Frames of Locomotive Engines, Railroad
and Common Road Vehicles, and for other purposes.
JOHN HANDSLEY DALES of 45 Lofthouse Place, Leeds, in the County of York,
Civil Engineer do hereby declare the nature of this invention to be as follows:-
The invention consists of making the plates of laminated plate springs, of the
form on plan of a true cantilever of uniform depth, that is to say of the form of a
single or double isosceles triangle, the base or bases of which coincides with the
root or bearing part of the spring, and the apex or apices, with the bearing
points of the load on the spring, or the reverse, according to the mounting of the
spring.
In carrying out my invention, by preference, I make the said plates with a hole
in about the centre of the length and width of the same, for the purpose of
threading the plates onto a pin, stud or bolt for holding the plates together in
working position and I carry the metal round the said hole to maintain the pro-
portions of the section according to those of a cantilever aforesaid. The apices of
the triangles I form into a loop or bolt hole for the reception of a bolt or equivalent
provision for preventing the plates from falling asunder in case of fracture of any
of them. All the plates of a spring formed according to the invention are of the
same size and shape and any required strength of spring may be obtained by simply
piling any sufficient number of plates of the same size.
Dated this 21st day of April 1892.
JOHN HANDSLEY DALES.
COMPLETE SPECIFICATION.
An Improved Form of Laminated Plate Spring and Spring Plate, for
the Road Wheels and Frames of Locomotive Engines, Railroad
and Common Road Vehicles, and for other purposes.
JOHN HANDSLEY DALES of 45 Lofthouse Place Leeds in the County of York,
Civil Engineer do hereby 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 invention consists of making the plates of laminated plate springs of the
form on plan of a true cantilever of uniform depth, that is to say, of the form of a
single or double isosceles triangle, the base or bases of which coincides with the
root or bearing part of the spring, and the apex or apices with the bearing
points of the load or the reverse, according to the mounting of the spring.
In carrying out my invention, by preference I make the said plates with a hole
in about the centre of the length and width of the same, for the purpose of
threading the plates onto a pin, stud or bolt, for holding the plates together in
working position and I carry the metal round the said holes to maintain the
proportionate areas of the sections according to those of a cantilever aforesaid.
The apices of the triangles I form into a loop or bolt hole for the reception of a
bolt or equivalent provision for preventing the plates from falling asunder in case
of fracture of any of them. All the plates of a spring formed according to the
invention are of the same size and shape and any required strength of spring may
be obtained by simply piling any sufficient number of plates of the same size.
Referring to the accompanying sheet of drawings, Figs. 1 & 2. are a side elevation

page_text: and plan respectively of a locomotive driving axle spring formed according to the
invention, in which (a. a.) are two sets of plates forming together an elliptical
spring, the bolt (6) in the centre carrying the load on the spring which load causes
the spring to collapse. The bolts (c. c.) are for the purpose of fastening the ends
of the plates together and preventing them from falling asunder in case of the
breakage of any of them.
Figs. 3 & 4 are respectively a plan and side elevation of a double cantilever of
uniform depth the fulcrum or bearing point (d) being the point of resistance
and (e. e.) the load points, forming the principles of the invention.
Figs. 5.& 6. are the side elevation and plan respectively of a common railway
wagon spring according to the invention, the plates (f. f. f.) are for taking the
hearings of the spring; the pins (f¹ f¹ f¹) being for the same purpose of holding
the plates together as the bolts in Figs. 1 & 2.
Figs. 7 & 8 are respectively a side elevation and plan of a common barrow
spring, which is fixed at the root by bolt holes (g. g.) and at the point by the loop
holes (h).
Fig. 9 & 10 are respectively a plan and side elevation of a single cantilever of
uniform depth and fixed at the base of the triangle, forming the principles of the
invention as applied to the barrow spring. The point (i) is the fixed point of the
cantilever and the point (j) is the load on the same.
All the letters refer to the same parts in the different views and figures.
The cantilever spring plates are shewn by (a) in all the views.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The making of laminated spring plates of the form of a true cantilever of
uniform depth, and the method of fixing and holding them together as shewn and
described.
Dated this 21st day of January 1893.