An Improved Lock for Fastening Railway-chair Keys.
Year: 1890

page_text: Date of Application, 6th Mar., 1890
Complete Specification Left, &th Dec., 1890-4ccepted, 17th Jan., 1891
PROVISIONAL SPECIFICATION.
An Improved Lock for Fastening Railway-chair Keys.
ELIAS PARSONS of No. 27 Driffield Street Battersea in the County of Surrey
Engineer do hereby declare the nature of this invention to be as follows:-
This invention has for its object the more securely fastening of railway and other
rails to the chairs and consists in making in the wooden key or wedge a longitudinal
slot or groove of such a depth as may be desired into which slot or groove
I'insert a
metal lock or key with a spring attached, this key can be inserted from either side by
reversing, which key has at its opposite sides or ends two hubs which fit the chair
and grasp the same, the spring attached to the key or lock has at the front a serrated
or saw shaped surface with as many teeth or serrations as may be desired which
allows the wooden railway key to be driven home securely and also prevents its being
shaken out or becoming loose from various causes. This lock or key can be used with
or without the spring as may be most convenient, in the latter case the surface in
contact with the wooden key would be serrated.
1
1000
ELIAS PARSONS.
COMPLETE SPECIFICATION.
An Improved Lock for Fastening Railway-chair Keys.
I, ELIAS PARSONS residing at No. 27 Driffield Street Battersea in the County of
Surrey, Engineer, 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 improvements in locking devices for preventing any motion
on the part of the wooden keys of railway chairs after they have been driven up and
consist in a resilient bar adapted to bite the key and to at the same time embrace the
chair so that as the chair will hold the bar and prevent it from moving so also will the
bar prevent the key moving.
Referring to the accompanying drawings
Fig. 1 is a plan of the resilient bar or improved lock.
Fig. 2 is a perspective view of the key.
Fig. 3 is a perspective view illustrating the operation of the invention.
The lock is made preferably of steel. The resilience resides in the doubled end E,
and this end must possess this property which is the key note of my invention. Besides
this, this end discharges a further function inasmuch as it is adapted in conjunction
with the opposite end A to embrace the chair. The space or bar side between A and E
is the seat or face, which abuts upon or bears against the chair. The opposite external
face of the bar, viz. B is toothed to enable it to bite the key. As many teeth as may
be found necessary are formed in or on the said face.
Each key has a longitudinal groove F cut in one side of it.
The invention is used as follows.
The lock is laid in the chair with the seat or face D close thereto, and the tooth
face B next the rail. The key is then driven in, with the groove over the said toothed
face. The lock is thereby compressed, with the result that its natural resilience will
cause its teeth to bite into the key, and so fix the same permanently to the lock, as the
latter is permanently held by the chair.
I wish it to be distinctly understood that my invention includes making the bar in
two pieces joined together at the point E in any way adapted to impart the necessary
degree of resilience to the toothed face B.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I claim is,
The combination with a doubled resilient bar, of seat, two ends adapted to embrace
the chair, and a toothed face adapted to bite the key, as set forth.
Dated this 6th day of December 1890.
ELIAS PARSONS.