An Improved Railway Ohair.
Year: 1889

page_text: Date of Application, 22nd Mar., 1889
Complete Specification Left, 20th Dec., 1889-Accepted, 15th Mar., 1890
PROVISIONAL SPECIFICATION.
An Improved Railway Ohair.
HORACE HEWISON PERRY Boswell Cottage, South End Croydon (Engineer)
THOMAS OWEN JACOBSEN, 4 Carleton Villas Maude Road Camberwell Surrey
Gentleman do hereby declare the nature of this invention to be as follows:-
A self-tightening metal chair for holding the rail in position on the permanent-way
of railways, tramways etc. This chair consists of two pieces the base and outer jaw
cast in one piece of solid metal with an inclined plane of about 40 degrees or there-
abouts on its inner or fore-foot side having its lower extremity about one inch and a
half below the under side of lower flange of rail and about the same distance to the left
of a perpendicular line drawn through the middle of the web of the rail. The inner
jaw is removable and has a projection which forms the seating of the rail, this jaw is
cast with a plane of a corresponding angle upon its lower side which rests and moves
in a diagonal direction upon the plane of the base of the chair.
On the under side of the projection above named a space of from th to 13th inch
is allowed, the weight upon the upper flange of the rail is received upon the projection
and the removable jaw is forced down the inclined plane of the base of the chair thus
decreasing the distance between the two jaws and establishing a firm grip upon the
web of the rail. The greater the weight upon the rail the tighter the grip upon
the web.
1
1 1000
H. H. PERRY.
T. JACOBSEN.
COMPLETE SPECIFICATION.
An Improved Railway Chair.
HORACE HEWISON PERRY Pinehurst Oxted Surrey Engineer formerly of Boswell
Cottage South End Croydon THOMAS OWEN JACOBSEN of 4 Carleton Villas Maude
Road Camberwell Surrey Gentleman do hereby declare the nature of this inven-
tion 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 chairs for the permanent or temporary way of railways or
tramways. The chief object I have in view is to establish a simple and efficient joint
or intermediate chair which will tighten and fasten the rail securely merely with the
weight of trains passing over it thereby dispensing with the use of ordinary keys or
wedges in the case of intermediate chairs, and with the fish plates, bolts and washers
when applied to the joints of rails.
To accomplish this I cast my chair in two pieces-the base of the chair having one
jaw integral therewith, and the sliding or detachable jaw.
The base of the chair consists of a good solid piece of metal as shown in accompany-
ing drawings.
On the opposite side of the chair to the stationary jaw and running parallel with it,
I have an inclined plane at an angle of 45 degrees or therabouts, from one end of the
chair to the other and inclining towards the centre of the chair a. a. fig. 1. This
plane forms the bearing for the detachable jaw, which is cast on its under side
at a corresponding angle b. b. fig. 1, and thus guides its movement, indicated by
dotted lines fig. 1.
The detachable jaw is extended at its lower extremity so as to form a seating for the
rail c. c. fig. 1. and a space of an eighth of an inch is allowed between the under side of
the said seating and the base of the chair.

page_text: Running down the inclined plane on the base of the chair, at right angles to the
direction of the rail, I cast two grooves a. a. fig. 2 into which two corresponding
projections cast on the under side of the detachable jaw take their place b. b. fig. 2.
this is to prevent the removable portion of the chair, with the rail, from what is known
as "travelling."
We will now assume that the rail is in the position indicated by the dotted lines
fig. 1. when weight is applied to the rail it will immediately force the sliding jaw down
the inclined plane on the base of the chair, decrease the distance between the two jaws
of the chair, and establish a firm grip upon the web of the rail. The weight upon the
rail practically wedges it securely between the two jaws of the chair and the greater
the weight the firmer the grip.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner to same is to be performed, I declare that what
I claim is
(1) The inclined plane upon the base of the chair.
(2) The seating and inclined plane on the underside of detachable jaw.
(3) The system of wedging thus established and herein before described.
Dated this 20th day of December 1889.
HORACE H. PERRY.
THOMAS OWEN JACOBSEN..