securing the Keys therein.
Year: 1884

page_text: securing the Keys therein.
We SAMUEL MARSDEN of 8 Burlington Street, Altrincham in the County of
Chester, Manager, and ERNEST MULLIN of 43 Dickens Street, Halifax, in the
County of York, out of business, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN RAILWAY CHAIRS AND IN THE METHOD OF SECURING THE
KEYS THEREIN to be as follows:-
"1
Our Invention relates to the appliances known as railway chairs employed to
support and hold in position the rails of permanent way as is well understood. In
ordinary cases the rail is fastened within the jaws of the chair by means of a
wooden key and the influences acting upon these keys tend to loosen them so that
they in many cases cease to hold the rail firmly and in all cases require_constant
surveillance. To remedy this defect is the object of our Invention. We cast or
form in the face of the jaw which forms the abutment for the key a vertical groove
or a groove extending from the top of the jaw in a downward direction or we form
the chair with two or more of such grooves. When the key is driven up until the
rail is held with the desired degree of security a pin spike or metal key is inserted
in the top of the said groove or of one of them and is driven down so as to project
on one side into the substance of the wood or to compress the fibres of the same
and to offer a resistance to the endwise movement of the spike. The said spike
may be square round or of other suitable section. We consider a square section to
be the most suitable, one angle of the spike being forced into or against the key.
We prefer to form the spike with a suitable projecting head or hook so that the
spike can be readily withdrawn by means of the ordinary plate-layers tools or of a
special tool as preferred.

page_text: Securing the Keys therein.
We SAMUEL MARSDEN of 8 Burlington Street, Altrincham in the County of
Chester, Manager and ERNEST MULLIN of 43 Dickens Street, Halifax in the
County of York out of business do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN RAILWAY CHAIRS AND IN THE METHOD OF SECURING THE
KEYS THEREIN and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement and
accompanying drawings:-
"
Our Invention relates to the appliances known as railway chairs employed to
support and hold in position the rails of permanent way as is well understood. In
ordinary cases the rail is fastened within the jaws of the chair by means of a
wooden key and the influences acting upon these keys tend to loosen them so that
they in many cases cease to hold the rail firmly and in all cases require constant
surveillance. To remedy this defect is the object of our invention. We cast or
form in the face of the jaw which forms the abutment for the key a vertical groove
or vertical grooves extending from the top of the jaw in a downward direction.
When the wooden key is driven up until the rail is held with the desired degree of
security a pin, spike or metal key is inserted in the top of the said groove or of one
of them and is driven down so as to become partially embedded in the key thus
preventing endwise movement thereof.
And in order that our said Invention may be properly understood we will now
proceed more particularly to describe the same with reference to the accompanying
sheet of drawings wherein Fig. 1 represents a vertical section and Fig. 2 a
plan of a railway chair with the rail a. keyed in position by means of a suitable
or ordinary wooden key b. The drawings further illustrate our hereinbefore
referred to means for preventing the wooden key b. from working loose. The
jaw c. of the chair against which the key b. abuts is formed with any suitable
number of vertical slots or grooves d. In the drawing three such slots d. are
shown but the jaw c. might be formed with one or any number of such slots
greater or less than three.. When the wooden key b. has been driven sufficiently
tightly between the rail a. and the jaw c. a metal key or spike e. is inserted into
one of the slots or grooves and driven down between the wooden key and the jaw.
As the spike descends that portion of it which projects beyond the jaw c. is driven
into the wooden key as shown in the drawing compressing or indenting the material
thereof and effectually preventing the wooden key b. from working loose or dropping
out. In the drawing the spike e is of a square section one of the angles entering
the wooden key but it might be round triangular or polygonal in section. The
spike is preferably formed with a snap head as shown but any shape of head most
suitable for driving and withdrawing may be formed thereon.

page_text: 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
In railway chairs forming the jaw against which the key abuts, with a vertical
5 slot or groove or slots or grooves and inserting therein a metal spike or key which
is driven down so as to become partly embedded in the wooden key, for the purpose
and substantially in the manner herein before described and shown.