A SPIRAL SPRING AXLE Box OR BEARING FOR COLLIERY CORVES OR TUBS
Year: 1887

page_text: Date of Application, 12th Apr., 1887
Complete Left, 12th Jan., 1888
Complete Accepted, 17th Feb., 1888
RALPH HODGSON 48 Cliff View, Denaby near Mexborough, S. Yorks Colliery
Mechanic do hereby declare the nature of my invention for A SPIRAL SPRING AXLE
Box OR BEARING FOR COLLIERY CORVES OR TUBS, to be as follows:-
This Invention consists of two Steel Castings No. 1 & 2 respectively.
No. 1 is a flat casting on face or lower side with a dome on the upper side, this
dome contains a circular cavity to receive the Spiral Spring; also a centre hole for
the spindle of the lower casting No. 2 the spring working between them.
No. 2 Casting is a bearing with a spindle on the top side which slides or works
vertically through the upper or No. 1 casting, the dome or cavity of No. 1 casting
receives the spring when over loaded, the two castings coming together without injury
to the springs.
There are four of the above described springs and castings, for one corve or Tub,
or other Wagon for underground haulage.

page_text: COMPLETE SPECIFICATION.
A Spiral Spring Axle Box or Bearing for Colliery Corves or Tubs.
I RALPH HODGSON 48 Cliff View Denaby near Mexborough South Yorkshire
Colliery Mechanic, 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 :-
My invention relates to an improved spiral spring axle box bearing or pedestal for
colliery corves or tubs.
The letters of reference occurring in the following description of my invention
refer to corresponding letters on the accompanying drawings Fig. 1 of such drawings
shews one of my improved pedestals in end elevation Fig. 2 is a section of the same
taken on the line AB Fig. 1 and Fig. 3 is a plan view thereof similar letters of
reference in the various figures indicate corresponding parts.
My improved spring pedestal consists of two metal castings a-b. a forms the
upper and 6 the lower bearing of the axle box. The upper bearing has a flat face or
surface on its under side while a box or dome a¹ is formed on its upper side. This
box or dome has an internal circular chamber a² formed therein to receive a spiral
spring c. A central aperture a³ is cast in such upper bearing to receive a spindle d
which is cast on the top side of the lower bearing b. This spindle carries the
spiral spring c and works up and down vertically through the upper bearing in the
before mentioned central aperture therein.
When the spiral spring is compressed through overloading or otherwise it is
received into the circular chamber a while the faces of the two bearings a-b come
together without injury to the spring which is effectually protected by the box or
dome a A neb or projection e is cast on the lower bearing to prevent friction
between the axle box and the side of the wagon or other vehicle.
Suitable bolt holes f are formed in the upper bearing.
My improved spring pedestal will be found to work much easier and far more
effectually than those hitherto in use.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :-
A spring axle box bearing or pedestal consisting of an upper bearing a with box or
dome a circular internal chamber a² and central aperture a³ lower bearing 6 with
spindle d carrying a spiral spring call respectively constructed arranged combined
and fitted substantially in the manner herein before described and shewn.
This 10th
1000