An Improvement in Chairs for Railway Switches and Crossings and Rails.
Year: 1896

page_text: Date of Application, 10th Nov., 1896
Complete Specification Left, 20th July, 1897-Accepted, 4th Sept., 1897
PROVISIONAL SPECIFICATION.
An Improvement in Chairs for Railway Switches and Crossings and
Rails.
SAMUEL JAMES SUMMERSON and SAMUEL SUMMERSON WRIGHTSON Mechanical
Engineers, Albert Hill Foundry, Darlington, do hereby declare the nature of this
invention to be as follows:-
A chair consisting of an Improved Clip or Clips in conjunction with a suitable base
plate. The clip, made of a suitable material has the upper part formed to bear upon
and hold down simultaneously the flange or lower part of the rail, and the base of the
chair. The lower part of the clip is made to enter a hole in the base of the chair,
which forms an abutment relieving the bolt from strain, and preventing lateral
movement. The bottom of the clip, when used in conjunction with foundations or
sleepers made of wood or other soft material has fangs or projecting ridges formed to
penetrate the same. The chair may be secured to sleepers or foundations by fang
bolts, coach screws, spikes or other suitable fastening passing through both the clip
and the sole plate. A special form of the clip is made for slide chairs and crossing chairs
in which the part bearing upon the flange or lower member of the rail is continued
upward to bear against the web of the rail, to which it may be attached by a bolt or
other suitable fastening. Additional holes may be provided in the base for holding
the chair down to the sleeper or foundation by any suitable fastening, irrespective of
that or those used in conjunction with the clip or clips.
The Clips may be made either single or double, the single clip having one fastening
only, and the double clip two fastenings.
Dated thie 0th day of November 1900
SAM. J. SUMMERSON.
S. S. WRIGHTSON.
COMPLETE SPECIFICATION.
5 An Improvement in Chairs for Railway Switches and Crossings and
Rails.
SAMUEL JAMES SUMMERSON and SAMUEL SUMMERSON WRIGHTSON, Mechanical
Engineers Albert Hill Foundry Darlington 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 :-
This Chair consists of an improved clip or clips in conjunction with a suitable Base-
plate. The clip has the upper part formed to bear upon and hold down by the
011

page_text: intervention of a bolt or other suitable fastening both the rail and the base-plate, the
lower part of the clip is formed to pass through or partially pass through a suitably
formed hole in the base-plate, which forms an abutment relieving the bolt or other
fastening from side strain and preventing lateral movement, the lower part of the
clip is provided with a projection or projections, which penetrate the sleeper
preventing movement between the base-plate and the sleeper.
A modification of this chair has a duplex clip, with the upper part extended
upwards for the purpose of securing it by a bolt or other fastening to the web of the
rail, making it applicable to switches & crossings, or to situations where the ordinary
.form cannot be used.
And in order that our present invention may be fully understood and readily
carried into practice we will proceed to describe the same with reference to the
accompanying drawings, which show examples of its application and the manner in
which we carry it out by the Figures marked 1 to 4 inclusive in the said
accompanying 2 sheets of drawings.
Similar letters of reference are used to indicate corresponding parts throughout.
In Figures 1 & 2 on Sheet 1 of the drawings are shown the Rail attached to the
sleeper in which the clip is indicated by the letters a, b, c having reference to the
upper part, lower part, and projections respectively and the base-plate is indicated
by the letter d.
In Figures 3 & 4 on Sheet 2 of the drawings, the modification is shown in the form
of a duplex clip with the upper part extended for the purpose of securing it to the
web of the rail the said e tension being indicated by the letter e.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
(1) A chair the novel feature of which is a specially formed clip passing through or
partially pa ing through a hole in a base-plate, and having a shoulder abutting on
edge of said. le precisely as described and explained.
(2) A chair the novel feature of which is a specially formed clip passing through or
partially passing. through a hole in a base-plate and provided with a projection or
projections which penetrate the sleeper precisely as described and explained.
Dated this 10th day of Tul. 1907