Improvements in and relating to Railway Carriage and other Doors.
Year: 1899

page_text: Date of Application, 6th Jan., 1899-Accepted, 11th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in and relating to Railway Carriage and other Doors.
I, HORACE BOURNE, of 6, Ardgowan Gardens, Hither Green, Lewisham, Lon-
don, S.E., 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:-
-
This invention relates to an improved checking device for preventing the slam-
ming of doors and the like, and is designed with the object of providing means
for checking or retarding the too sudden or violent closing of a door, gate or
hinged casement, in such a manner as to prevent the slumming of such door,
for instance, and to minimize the shock or jar of the closing, while at the same
time, allowing the said door to close freely."
In order that this my said invention may be the more readily understood and
carried into practical effect, reference is hereby made to the accompanying sheet
of illustrative drawings, wherein :-
Fig. 1, is a sectional elevation of the device in position upon the jamb of an
ordinary door-frame and,
Fig. 2, a front elevational view of same.
Referring to the drawings, wherein like letters of reference indicate corres-
ponding parts in both figures, a represents a metal case of rectangular form, to
which is fixed or formed integral therewith a slotted face-plate a, such case
being let into a counter-sunk recess in the jamb b of the door and fixed in that
position by means of screws c or their equivalent.
Within this case a fits a buffer d of india-rubber or other suitable yielding
material, which is cut away or recessed for a portion of its length at each end
to form square shoulders d and a projecting central portion . The said buffer d
is maintained in position within the case a by means of flanges a³ on the face
plate a¹ of the case n.
In operation, the device is fixed at any convenient height to the front of the
jamb 6 by means of the screws c or their equivalent, one of the shorter sides of
the device being upper-most. The device is fixed to that surface of the jamb b
which the vertical edge of the door passes when the latter is shut to.
When the door is being shut, the front edge of same will come in contact with
the portion of the buffer d, which projects through the slot in the face
plate a, fixed to the jamh, and depress such buffer sufficiently to allow the said
door to pass the cushion-like obstruction, the length of such buffer being such,
in comparison with that of the case a, as to allow of a certain and necessary.
amount of expansion of the said buffer within such case. By this means, the
impetus of the door is sufficiently checked to prevent such door slamming or
closing with too much force, while at the same time, it is allowed to readily shut.
I may hollow out or recess the back of the buffer d as at din order to enhance
its resiliency, and if desirable, interpose a suitable spring (not shewn) between
such back and the back of the case a.

page_text: Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what
I claim is:-
CLAIMS.
1. The improved checking device for preventing the slamming of doors and
the like, consisting in a case in which fits a yielding buffer having recessed ends
which take beneath. flanges formed by the slotted face plate, substantially as
described and shewn.
2. In a checking device for doors and the like, the case a having a slotted
face-plate a¹ whose slot is of smaller size than the said case to form flanges; in
combination with a yielding buffer d of shorter length than that of the case,
and having recessed ends which fit under, and are retained in position by, the
said flanges on the face-plate, a portion of the said buffer projecting through the
slotted face-plate and being adapted to be compressed flush with the surface of
said face-plate, while the back is hollowed out or recessed, all arranged, com-
bined, and operating substantially as described and as illustrated by the drawings.
Dated this 6th day of January 1899
HUGHES & YOUNG,
55 & 56, Chancery Lane, London, W.C.,
Agents for Applicant.
HUGHES & YOUNG,
55 & 56, Chancery Lane, London, W.C.,
Agents for Applicant.