Improved Means or Apparatus for Holding Railway Carriage Door Lights and other Sliding Windows in any Required Position.
Year: 1889

page_text: Date of Application, 7th Sept., 1889
Complete Specification Left, 27th Feb., 1890-Accepted, 29th Mar., 1890
PROVISIONAL SPECIFICATION.
Improved Means or Apparatus for Holding Railway Carriage Door
Lights and other Sliding Windows in any Required Position.
BOWMAN MALCOLM Civil Engineer Belfast & Northern Counties Railway (Engineer's
Office) Belfast, & WILLIAM PENNINGTON, Manufacturer's Agent, 117 Donegall Street,
Belfast, do hereby declare the nature of this invention to be as follows:-
This invention relates to apparata, which we let into the sides of window frames, or
the doors of railway or other carriages, which coming into contact with the frames of
windows, or sliding lights, holds the latter, in any required position.
The form of apparatus which we consider most suitable, consists of rubber pads of
peculiar shape, so fixed in the window frames, or the doors of carriages, that when
the rubbers are brought into a position at or about right angles to the sides of window,
or the door-styles, or cross rails of carriage doors, by the downward pressure, due
to the weight of the window, or light, the rubber pads are compressed and presses
tightly against the side of the light or window, thereby holding the latter in any
required position.
An increased pressure of the window downwards, will turn the rubber or rubbers,
and thus permit the window to be lowered with ease.
We make a small recess in the window frame, opposite the rubber when the
window is in its lowest position, so that it may be lifted with ease; the recess before
mentioned allowing the rubber pad to turn into the upward position without effort.
In addition to the above apparatus when it is desirable to prevent the sudden drop
of a window, or light, when being lowered, we fix in a suitable position on the cross
rail of a carriage door, a case having a graduated cavity, in which, one or more
rubber rollers are placed. The rubber rollers are in contact with the window frame,
which when being raised, draws the rollers into the deepest part of the graduated
cavity, but when the window is being lowered, the rollers descend, and get into the
smaller part of the cavity and being then compressed between the window frame and
the back of the cavity, retard the downward movement of the window.
Dated this 4th day of September 1889.
B. MALCOLM.
WM. PENNINGTON.
COMPLETE SPECIFICATION.
Improved Means or Apparatus for Holding Railway Carriage Door
Lights and other Sliding Windows in any Required Position.
BOWMAN MALCOLM C.E., Chief Engineer's Office, Belfast and Northern Counties
Railway Station, Belfast and WILLIAM PENNINGTON Manufacturer's Agent, 2ª Great
Victoria Street and 117 Donegall Street Belfast 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:—
Our Invention relates to apparata which we let into the sides of window frames, or
the doors of railway or other carriages, and which coming into contact with the
frame of window or sliding light, holds the latter in any required position.
consists
The form of apparatus which we consider most suitable for the purpose,
of a device, wherein a rubber pad of peculiar form, is secured in a pawl, and metal
case, and so fixed in the window frames, or doors of carriages, that when the rubber
or rubbers, are brought into a position at or about right angles to the sides of
windows, or the door styles or rails of carriage doors, by the downward pressure due
LD 21

page_text: to the weight of the window or light, the rubber is compressed, and presses against
the side of the window or light, and thus holds the same in any required position.
An increase of the downward pressure will turn the rubber downwards, and thus
permit the window or light to be lowered, and in order that the window or light may
be lifted with ease, we make a small recess in the window frame, opposite the rubber
and pawl, when the window is in its lowest position, which said recess will allow the
rubber and pawl to turn upwards without resistance.
In order that the said invention may be more particularly described, and fully
understood, we shall now refer to the figures and letters of the accompanying
drawings.
Fig. 1 represents the apparatus complete, and the letters refer to the position of the
separate parts. A is the base plate, which is secured to the side or edge of a carriage
door, by screws at each end. B metal case which being hinged by a pin at O, permits
the free movement of the opposite end at R. In the metal pawl C, there is a cavity
in which the rubber pad D is placed. The metal case B at the end O, is engaged
with the socket H (having lugs) by a pin, and into the socket H. the adjusting
screw F is screwed; having first passed through the base plate A, and being held
there free to turn either to right or left, without entering or receding, by means of
the pin G, it thus regulates the distance required, of the case B from the plate A.
In order that the contact of the metal pawl C, after the rubber has turned down, may
he as free from rigidity as possible, a spring N is placed on the screw L, and resting
upon the adjusting nut M, is pressing against the case B, at the free hole R; thereby
compensating for sudden or extra pressure.
The rubber pad D, having been placed and secured in the cavity of the pawl C, the
latter is in turn secured by a pin through the hole T, in the aperture of the metal
case B. The pawl and rubber being excentric; in moving downwards, projects at
the upper side, and recedes in being drawn upwards by the window, the latter is
therefore free to move upwards without resistance, but in its downward movement, it
is held in check by the reversing movement and pressure of the rubber D and the
pawl C; the pressure of which, by the spring N is perfectly regulated.
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: --
1st. The apparatus consisting of a rubber pad of peculiar form inserted in a metal
pawl of the shape described, or similar, and the same so placed in a suitable metal
case hinged at one end, and resting on a spring at the opposite end: the whole being
secured to a base plate A, and which is let into the side, or door style of a railway
carriage door, or window frame, in such a position that when the rubber or metal
pawl is in contact with, and at or about right angles to the side of the window
frame; the latter is held in any required position.
2nd. The adaptation of the apparatus to the outer edge of a carriage door, and the
means of adjusting the same by a screw from the outside of the base plate A.
3rd. The device of making a small recess in the window frame, directly opposite
the said apparatus, when the window or light is in its lowest position, which permits
of the turning upwards of the rubber, so that the window or light may be lifted with
ease.
: -
Dated this 95th day of Woh 1800
B. MALCOLM.
WM. PENNINGTON.