Improvements in the Construction of Buffer-spring Cases.
Year: 1895

page_text: Date of Application, 11th Apr., 1895
Complete Specification Left, 11th Jan., 1896-Accepted, 14th Mar., 1896
PROVISIONAL SPECIFICATION..
Improvements in the Construction of Buffer-spring Cases.
I, BENJAMIN FREDERICK COCKER of Fitzalan Works, Sheffield in the County
of York, Managing Director, do hereby declare the nature of this invention to be
as follows:-
This invention relates more particularly to colliery cage buffer cases, but it is
also applicable to buffer cases for railway and other purposes.
The object is to produce a comparatively cheap form of case as it may be made
either wholly or partly in cast iron or cast steel.
It consists firstly of a base plate by which it is fixed to the underside of the cage,
or to any suitable framework in the sump of the pit shaft, and to which the other
parts of the case are bolted. The head is a hollow cylinder, closed at one end to
receive the impact, and with a circular opening at the other end of smaller diameter
than the interior so as to leave an annular flange or collar.
The body of the case consists of two longitudinal segments of a cylinder with
flanges at both ends, one prepared with bolt holes by which it can be secured to
the base plate, and the other to fit upon the annular flange in the head. The
radius of these segments corresponds with the circular opening into the head, and
that of the flange with the interior of the head or thereabouts, but they are of such
a size segmentally that they can be passed through the opening into the head, to
enable their flanges when they are drawn apart to engage with and rest upon the
inside of the annular flange of the head. To close the space of separation between
the two parts of the body of the case, I use a central tube which closes the openings
and is preferably held in position by means of a flange at one end passing under
the body.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
Improvements in the Construction of Buffer-spring Cases.
I BENJAMIN FREDERICK COCKER of Fitzalan Works, Sheffield in the County.
of York, Managing Director do hereby declare the nature of this invention and
in what manner the same has to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention relates more particularly to buffer cases used for colliery purposes,
but it is also applicable for railway and other like purposes..
The object of the invention is to simplify the construction so as to permit the
several parts to be cast to shape, thereby saving labour and reducing the cost of
manufacture.
In order that the description may be clear and be readily understood, I have
illustrated same in the annexed sheet of drawings in which like letters of reference
indicate like parts in any of the figures.

page_text: :
;
Fig. 1, is an elevation of a buffer case according to my invention, half being
shown in section.
Fig. 2, plan of the base plate with the central tube.
Fig. 3, elevation of one of the segmental retaining pieces.
Fig. 4, plan of the two segmental pieces shown in their relative positions.
A buffer case such as that shown in the drawings consists of a head A, a base
plate B, having a central tube C, two segmental pieces D¹, & D², and a back
plate E.
The head A, consists of a hollow cylinder closed at one end where it is suitably
formed to receive the impact of an opposing body, the open end being provided
with an internal flange or collar A', which reduces the diameter of the opening into
the interior.
;
The baseplate B, is recessed at B, & B³, to receive the flat parts of D', and D²,
as seen in Fig. 1, and the vertical tubular part C, is of such a diameter as to admit
the body of the pieces D', and D2, between the periphery, aud the collar or
flange As, upon the head.
The underside of the baseplate is preferably recessed to receive a backplate E,
which closes the opening, retains the spring, and forms the point of resistance when
the spring is compressed by forcing down the head.
The segmental retaining pieces D', and D2, have an internal concaved face
corresponding with the outside of the tube C, and their outside surface corresponds
with the diameter of the opening through the flange A².
Each segmental piece is provided with a collar F, at its top edge to engage with
the flange A³, as shown in Fig. 1.
These segments are of such a size that their collar pieces can be passed through
the opening into the head, and then moved to the position shown in Fig. 1, the
collar pieces F, resting upon the top face of the Hange A', and when in this
position the tube C, can be passed up between them to the position shown, and
when the spring is put inside, the whole of the parts are finally secured by the
bolts G.
To retain the segments D', and D', firmly in position, and to fill up the gap that
would otherwise be left between them as seen in Fig. 4, I provide upon two sides
of the tube C, extending from the top to the base, a filling up piece H, against
which the edges of the segments fit.
The said parts when put together form a compact, substantial buffer case,
constructed and fitted together with the smallest amount of skilled labour, and
giving perfect protection to the enclosed spring.
+.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed 1 declare that what I
claim is :-
1. A buffer spring case constructed as hereinbefore described and substantially
as shown in the drawings annexed.
2. A buffer case consisting of a head A, a base B, provided with a tubular
extension C, in combination with two segmental retaining pieces D, as hereinbefore
described and shown.
Dated the 9th day of January 1896.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.