Improvements in Doors and Windows both of Vehicles and Buildings.
Year: 1894

page_text: Date of Application, 26th July, 1894
Complete Specification Left, 23rd Nov., 1894-Accepted, 12th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in Doors and Windows both of Vehicles and Buildings.
I RICHARD DE MULINFELDT LAWSON of 70 Besson Street New Cross Surrey
Gentleman do hereby declare the nature of this invention to be as follows
My invention has for its object the facilitating 1 the operation of raising or
lowering the windows of railway, tram, road, or any other vehicles and also all'
windows whether of vehicles or buildings that are moved by sliding and holding
them at any height desired. 2 the prevention of all rattling or other noise from
the shaking of such windows and also of all doors whether of vehicles or buildings-
and 3 the exclusion, when the said doors and windows are closed, of all draught
and dust.
The following description applies to a railway carriage door and window but will
also serve for a general description.
The door is constructed with the grooves or slides in which the window moves,
as hitherto, but with the sides of the said grooves or slides perfectly parallel the
whole of the length to which they extend. In the upper half, or as far as may be
necessary, of such groove on each side is a second smaller groove or recess to
receive a toothed or rachetted piece of metal which is secured fast in it one on each
side the teeth coming flush with the edges. The sash frame is made in the ordinary
way but rather thicker to allow of the upper cross piece being grooved. At the
two extremities of this groove are fixed two short rectangular metal tubes the outer
edges of which are flanged to admit of their being secured to the frame. In these
tubes slide two bolts operated on by arms attached to a wheel which turns on a
spindle hung between two plates one on each side and secured to each other by
screws at the four corners. One of these plates (that on the inside of the carriage).
carries a sash lift and just over it and at right angles with it is a latch affixed to
the spindle of the wheel. The bolts are kept extended by two springs, one each
side, and fit into the teeth of the rachet, thus supporting the window. When the
latch is pressed down on the sash lift the wheel is caused to revolve sufficiently to
withdraw the bolts and the window can be raised or lowered as desired. On the
pressure being taken off the springs cause the bolts to fly out thus holding the
window at any height required. AT shaped piece of wood as long as the groove
cut in the upper cross piece of the sash frame and so shaped as to allow room for
the parts to work is finally put into the groove and secured thus filling up all
unrequired space and giving strength to the part.
To prevent rattling or shaking, and exclude when closed all draught and dust to
each side of the sash frame and on both sides of it is affixed a strip of felt or some.
other spongy or elastic and easily compressible material. Also across the bottom
sash but only on the outside and on the cross piece of the door covering the outside
of the window when raised, are affixed two other strips of the same material.
two first form a cushion to keep the window from shaking and in conjunction:
with the two latter form a packing to exclude all air and dust when the window is
closed.
The
"The same result is attained in the case of the doors as follows. The door and
frame are made with a rebate as now but the rebate is a little larger and continued
all the way round. Against the edge of this rebate in the door frame is affixed a
strip of the same elastic and easily compressible material as the windows are
.

page_text: furnished with. The bolt which fastens the door is thinner at its extremity
gradually increasing on the outside to its full size at about half the distance it
projects thus forming a kind of wedge. When the door is closed it shuts against
the elastic and easily compressible material which is compressed by it and this is
further effected and the pressure increased by the bolt being wedge shaped, thus
forming an air and dust proof packing all round.
Dated this 26th day of July 1894.
Improvements in Doors and Windows both of Vehicles and Buildings.
I, RICHARD DE MULINFELDT LAWSON 70 Besson Street New Cross Surrey
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 has for its object the facilitating
1st. The operation of raising or lowering the windows of railway, tram, road or
any other vehicles and also all windows whether of vehicles or buildings that are
moved by sliding and holding them at any height desired.
2nd. The prevention of all rattling or other noise from the shaking of such
windows and also of all doors whether of vehicles or buildings.
3rd. The exclusion when the said doors and windows are closed of all draught
and dust.
The following description applies to a railway carriage door and window but
will also serve for a general description.
The door is constructed with the grooves or slides in which the window moves as
hitherto but with the sides of the said grooves or slides perfectly parallel the
whole of the length to which they extend. In the upper half or as far as may be
necessary of such groove on each side is a second smaller groove or recess to receive
a toothed or ratchet piece of metal which is secured in said recess, one on each side
of the window. The sash frame is made in the ordinary way but rather thicker to
allow of the upper cross piece being grooved. At the two extremities of this
groove are fixed two short rectangular metal tubes the outer edges of which are
flanged to admit of their being secured to the frame. In these tubes slide two
bolts operated on by arms attached to a wheel which turns on a spindle hung
between two plates one on each side and secured to each other by screws at the four
corners. One of these plates (that on the inside of the carriage) carries a sash
lift and just over it and at right angles with it is a latch affixed to the spindle of
the wheel. The bolts are kept extended by two springs one each side and fit
into the teeth of the ratchet thus supporting the window. When the latch is
pressed down on the sash lift, the wheel is caused to revolve sufficiently to withdraw
the bolts and the window can be raised or lowered as desired. On the pressure
being taken off, the springs cause the bolts to fly out thus holding the window at
any height required. AT shaped piece of wood as long as the groove cut in the
upper cross piece of the sash frame and so shaped as to allow room for the parts to
work is finally put into the groove and secured thus filling up all unrequired space
and giving strength to the part.
To prevent rattling or shaking and exclude when closed all draught and dust to
cach side of the sash frame and on both sides of it is affixed a strip of felt or some
other spongy or elastic and easily compressible material. Also across the bottom
sash but only on the outside and on the cross piece of the door covering the
outside of the window are affixed two other strips of the same material. The two
first form a cushion to keep the window from shaking and in conjunction with the

page_text: two latter form a packing to exclude all air and dust when the window is closed.
In the case of a railway carriage door, the bolt securing the door is wedge shaped
so that the door is drawn close to the strips of material when the door is secured.
In order that my invention may be fully understood I now refer to the annexed
drawings in which :
Figure 1 is a sectional elevation showing my invention.
Figure 2 elevation to enlarged scale of the latch and "lift."
a is the sliding window which slides in grooves in the frame p of the door or
window. c are two bolts jointed at g and which slide in tubes b attached to
the window a. The bolts c are pivoted at i to the wheel j. d are springs which
are pivotally attached at e to the bolt c, and also at to the window frame a.
The wheel is attached to a spindle m having bearings in plates attached to the
window frame a. The ends of the bolts c are bevelled & engage on the rack piece
or ratchet h. n is a latch piece which is attached to the spindle m so that when the
latch piece n is moved in the direction of the arrow 1, the bevelled ends of the
bolts are withdrawn from the rack or ratchet piece h. The dotted lines k
represent the position of strips of felt or such suitable material which is attached
to the edges of the window frame a for preventing rattling or shaking and
excluding dust & draught. o is a "lift" or knob for raising the window a when
desired. is a T shaped piece which closes the aperture at the top of the window
frame a.
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 :-
1. In sliding windows, two or more jointed bolts sliding in sockets attached to
the window frame and pivotally attached to a wheel or disk at one of their ends,
their other ends being bevelled and engaging in racks or ratchet pieces attached in
grooves in the frame in which the window slides, said bolts being controlled by
spring pieces pivotally attached to same at one of their ends, the other ends
being pivoted to the sliding window frame, a latch piece attached to the spindle
carrying the wheel or disc aforesaid, for withdrawing the bevelled ends of the bolts
from the racks or ratchets when desired, a lift or knob for raising or lowering said
sliding window frame, the edges of the sliding window frame being provided with
strips spongy or elastic material such as felt for ensuring a tight joint between the
sliding window frame and the grooves in which it slidess, thus preventing rattling
or shaking and the passage of draughts or dust, all in combination and substantially
as described & illustrated.
Dated this 22nd day of November 1894.
E. EATON,
Agent for Applicant.