An Improved Fastening for Railway Chairs.
Year: 1887

page_text: Date of Application, 8th Oct., 1357
Complete Left, 7th June, 1888
Complete Accepted, 13th July, 1888
An Improved Fastening for Railway Chairs.
JOHN CHAMBERS of Lowestoft in the county of Suffolk, Shipwright and JOHN
COLBY of Oulton in the county of Suffolk, Shipwright do hereby declare the nature of
this invention to be as follows:-
An iron tube, in which the part that is to be driven into the sleeper, is split in a
vertical direction in one or more places and the lower end is pressed to a smaller
diameter by allowing the edges of the metal to lap one over the other. There are
projections on this tapered part which extend outward to the extent of the diameter
of the upper part of the tube.
The tube is inserted in the chair and driven into the hole bored in the sleeper. A
bolt of the same size as the diameter inside the tube, is then driven into the tube,
expanding it and pressing the projections into the sleeper. The chair is then secured
by a nut screwed on the top end of the tube and a forlock driven into a hole in the
bolt above the nut.
The invention is hereinafter described with reference to the accompanying
drawings in which the same letters indicate like parts in all the figures.
Figure 1 is the elevation of the tube shewing screw thread on the outside at the
upper part. The projections are shewn on the tapered part of the tube.
Figure 2 is a section shewing tube with bolt and nut in position when fixed in
sleeper.
is a projection; b, is the point from which the tube is split downwards, c, is the
forlock hole in the bolt, D), is the chair, E, is the nut; F, F, is the bolt.
Dated this Seventh day of October Eighteen hundred and eighty seven.

page_text: An Improved Fastening for Railway Chairs.
JOHN CHAMBERS of Lowestoft in the county of Suffolk, Shipwright and JOHN COLBY
of Oulton in the county of Suffolk Shipwright 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 :-
We take an iron tube in which the part that is driven into the wood is longitudi-
nally divided or slit in halves. The diameter of this part in the direction of the slit
is of the same size as the upper part of the tube, but from the point where the slit
commences to the lower end, the tube flattens in shape and the lower end is also
flanged out to the size of the upper part of the tube. There are projections or studs
punched out upon the surface of the tapered part which extend outward to the size of
the upper part. The tube, with the ordinary screw nut on the upper end, is inserted
in the chair and driven into the hole in the sleeper. An iron plug of the same size as
the inner diameter of the upper part, and with a short tapered end, is then driven
into the tube expanding the lower end and pressing the projections into the wood.
The nut is then screwed home and secured by having a washer to turn up about its
sides. The washer having a slot in its edge to fit a projection on the chair to prevent
its turning with the nut. The invention is hereinafter described with reference to the
accompanying drawings in which the same letters indicate like parts in all the figures.
Figure 1 is a section of the tube shewing the taper of the lower part, the pro-
jections a and the slit bb. Figure 2 is a section at right angles to figure 1.
Figure 3 is a section of the tube when expanded by the iron plug and with nut c c
and washer d d in position.
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
1. A tubular expansible bolt having projections on the outside of that part which is
driven into the wood, in the way described and shewn in the accompanying drawings.
2. The application of the ordinary screw nut to form the head of the expansible
bolt.
Dated this Sith
CT..
1300
JOHN CHAMBERS.
JOHN COLBY.