Improved Fastening for Carriage Sash-windows and the like.
Year: 1886

page_text: PROVISIONAL SPECIFICATION.
Improved Fastening for Carriage Sash-windows and the like.
I DOUGLAS ALLPORT of 7 St. Benet Place, London E.C. Merchant do hereby declare
the nature of this invention to be as follows:-
My invention relates to a method of retaining the sliding sashes of Railway and
other windows in position by means of an attachment which can be applied in a few
minutes and repaired or renewed without any alteration whatever to the existing
windows, and without taking the carriage out of work.
It also has the following advantages.
It requires the use of only one hand for all purposes of raising, lowering and fixing the
sash in any position. It has no mechanism to get out of order, and the whole arrange
ment being perfectly visible at a glance there is no temptation to tamper with it from
curiosity. There is nothing to steal. It can be adjusted to an existing window by
means of half a dozen small screws, and on being removed leaves no mark beyond the
screw holes.
I effect my object by means of a metal rack having teeth inclining upwards, fastened
to the side of the window frame parallel with the outer edge of the groove in which the
sash slides, and with the points of the teeth towards the sash. Opposite to this rack,
near the top of the sash frame, is fixed a metal tooth inclining downwards in such a
way that it will catch upon either of the teeth in the rack on the window frame, and
thus hold the sash from slipping. The play allowed by the grooves in existing
windows is sufficient as a rule to permit of the tooth being disengaged (supposing it
and the rack to be upon the inside of the window) by a slight outward pressure upon
the lifting handle, which I should place on the top bar of the sash.
Thus to raise
or lower the window the handle would be pressed slightly outwards while lifting or
lowering; and to fix it the handle would be drawn slightly towards the operator. A
071

page_text: spring may be added, either to cause the sash to catch automatically, or to keep it from
doing so, as may be preferred. An objection to the arrangement as described is that
it is possible in raising the window, to cause a rattling noise by grating the tooth on
the sash frame against the teeth on the rack. This I obviate by means of a strip of
hard wood or other doadening material, so combined with the metal rack that the teeth
shall be protected by it. And I also attach a similar protection to the upper face of
the metal tooth or hook on the sash frame, so that the surfaces, which, through want
of care, may come into contact in raising the sash, will not cause the metallic jarring
alluded to.
The above described plan may be adapted to windows raised from below by means
of a handle projecting into the carriage through a slit in the door, as described in my
patent numbered 12,220 in 1885.

page_text: I DOUGLAS ALLPORT of 7 St. Benet Place London, E.C. Merchant 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 :-
1
My invention relates to a method of retaining the sliding sashes of Railway and
other windows in position by means of an attachment which can be applied in a few
minutes and repaired or removed without any alteration whatever to the existing
windows, and without taking the carriage out of work.
I effect my object by means of a metal rack having teeth inclining upwards, fastened
to the side of the window frame, outside the groove in which the sash slides, and
parallel with its edge. This rack may be on the outside or inside of the glass frame,
and the teeth have their points towards it in either case. Opposite this rack, on the
glass frame, I fix a metal tooth (or more than one if preferred, at suitable intervals)
inclining downwards in such a way that it (or they) will catch upon either of the teeth
in the rack on the window frame and thus hold the sash from slipping.
The play allowed by the grooves in existing windows is generally sufficient to permit
of the tooth being disengaged (supposing it and the rack to be upon the inside of the
window) by a slight outward pressure upon the lifting handle, which I should place by
preference upon the top bar of the sash. Thus to raise or lower the glass frame the
handle would be pressed slightly outwards while lifting or lowering, and to fix it the
handle would be drawn slightly towards the operator. A spring may be added, either
to cause the sash to catch automatically, or to keep it from doing so, as may be
preferred.
It is obvious that the arrangement described may be varied by placing the rack
upon the glass frame, and the tooth or teeth upon the window frame, reversing the
inclination of the teeth. It may be used on either or side but not on both sides of the
window.
If it should be preferred to let the rack or teeth into the wood so as to be flush with
the surface, subsequent repairs or alterations would not be rendered more difficult
thereby, but the initial expense would be increased.
I am aware that somewhat similar arrangements have been suggested, in which the
rack and teeth were concealed inside the groove of the window frame.
All such plans necessitate for their application and for subsequent repairs, the
removal of the sash frame from the door, rebating, countersinking and alterations
which can only be done in the workshop; while my fastener can be applied, repaired,
removed or replaced, owing to its accessible position, without any difficulty and at any
time with no tools beyond a bradawl and a screwdriver.
A possible objection to the arrangement as described is that it is possible in raising
the sash frame to cause a rattling noise by grating the tooth on it against the teeth on the
rack if made of metal. This I obviate by means of a strip of hard wood or other deadening
material so combined with the metal rack that the teeth shall be protected by it on the
under side. And I also attach a similar protection to the upper face of the tooth or

page_text: hook on the glass frame, so that the surfaces which, through want of care, may come
in contact in raising the sash, will not cause the metallic jarring alluded to.
The accompanying drawing shows the arrangement I prefer, but I do not confine
myself to a rack or tooth of the particular form shown. The rack may have teeth of
any suitable shape for the purpose of engaging with the tooth on the glass frame; and
the teeth may be disconnected from each other and secured separately in the form of
studs or pegs to the window frame if preferred. Similarly what I have described as a
tooth or hook on the glass frame may be of any suitable form for the purpose of
engaging with the rack on the window frame.
No. 1 is a face view of the upper corner of the glass frame with the hook or tooth
attached; and part of the window frame with the rack of metal and wood.
No. 2, is a side view of the same. The letters apply to the same parts in both cases.
A is the window frame.
B is the glass frame, sliding in.
C the groove of the window frame, slightly wider than the thickness of the glass.
frame to allow space for disengaging the tooth from the rack.
D is the rack fastened by screws to the window frame.
E is a thin strip of hard wood or other non-metallic substance either under or over
the metal rack and projecting beyond it at the points underneath the teeth, to protect
their lower sides from contact with the tooth on the sash-frame.
F The tooth secured to the sash frame.
T A tooth of the rack.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed I declare that what I claim is
1. The combination of a tooth or hook on the glass frame with a rack on the side of
the window frame, not concealed in the groove, so arranged that the tooth can be
engaged with the rack or disengaged by the outward or inward pressure of the sash
frame while raising or lowering it.
2. The above described arrangement reversed by placing the hook on the window
frame and the rack on the glass frame.

page_text: Date of Application, 11th Aug., 1886.
Complete Left, 6th June, 1887.
Complete Accepted, 8th July, 1887
I, DOUGLAS ALLPORT of 7 St. Benet Place, London E... Merchant do hereby declare
the nature of this invention to be as follows:-
My invention relates to a method of retaining the sliding sashes of Railway and
other windows in position by means of an attachment which can be applied in a few
minutes and repaired or renewed without any alteration whatever to the existing
windows, and without taking the carriage out of work.
It also has the following advantages.
It requires the use of only one hand for all purposes of raising, lowering and fixing the
sash in any position. It has no mechanism to get out of order, and the whole arrange-
ment being perfectly visible at a glance there is no temptation to tamper with it from
curiosity. There is nothing to steal. It can be adjusted to an existing window by
means of half a dozen small screws, and on being removed leaves no mark beyond the
screw holes.
I effect my object by means of a metal rack having teeth inclining upwards, fastened
to the side of the window frame parallel with the outer edge of the groove in which the
sash slides, and with the points of the teeth towards the sash. Opposite to this rack,
near the top of the sash frame, is fixed a metal tooth inclining downwards in such a
way that it will catch upon either of the teeth in the rack on the window frame, and
thus hold the sash from slipping. The play allowed by the grooves in existing
windows is sufficient as a rule to permit of the tooth being disengaged (supposing it
and the rack to be upon the inside of the window) by a slight outward pressure upon
the lifting handle, which I should place on the top bar of the sash. Thus to raise
or lower the window the handle would be pressed slightly outwards while lifting or
lowering; and to fix it the handle would be drawn slightly towards the operator. A

page_text: spring may be added, either to cause the sash to catch automatically, or to keep it from
doing so, as may be preferred. An objection to the arrangement as described is that
it is possible in raising the window, to cause a rattling noise by grating the tooth on
the sash frame against the teeth on the rack. This I obviate by means of a strip of
hard wood or other deadening material, so combined with the metal rack that the teeth
shall be protected by it. And I also attach a similar protection to the upper face of
the metal tooth or hook on the sash frame, so that the surfaces, which, through want
of care, may come into contact in raising the sash, will not cause the metallic jarring
alluded to.
The above described plan may be adapted to windows raised from below by means
of a handle projecting into the carriage through a slit in the door, as described in my
patent numbered 12,220 in 1885.

page_text: I DOUGLAS ALLPORT of 7 St. Benet Place London, E.C. Merchant 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 a method of retaining the sliding sashes of Railway and
other windows in position by means of an attachment which can be applied in a few
minutes and repaired or removed without any alteration whatever to the existing
windows, and without taking the carriage out of work.
I effect my object by means of a metal rack having teeth inclining upwards, fastened
to the side of the window frame, outside the groove in which the sash slides, and
parallel with its edge. This rack may be on the outside or inside of the glass frame,
and the teeth have their points towards it in either case. Opposite this rack, on the
glass frame, I fix a metal tooth (or more than one if preferred, at suitable intervals)
inclining downwards in such a way that it (or they) will catch upon either of the teeth
in the rack on the window frame and thus hold the sash from slipping.
The play allowed by the grooves in existing windows is generally sufficient to permit
of the tooth being disengaged (supposing it and the rack to be upon the inside of the
window) by a slight outward pressure upon the lifting handle, which I should place by
preference upon the top bar of the sash. Thus to raise or lower the glass frame the
handle would be pressed slightly outwards while lifting or lowering, and to fix it the
handle would be drawn slightly towards the operator. A spring may be added, either
to cause the sash to catch automatically, or to keep it from doing so, as may be
preferred.
It is obvious that the arrangement described may be varied by placing the rack
upon the glass frame, and the tooth or teeth upon the window frame, reversing the
inclination of the teeth. It may be used on either or both sides of the window.
If it should be preferred to let the rack or teeth into the wood so as to be flush with
the surface, subsequent repairs or alterations would not be rendered more difficult
thereby, but the initial expense would be increased.
I am aware that somewhat similar arrangements have been suggested, in which the
rack and teeth were concealed inside the groove of the window frame.
All such plans necessitate for their application and for subsequent repairs, the
removal of the sash frame from the door, rebating, countersinking and alterations
which can only be done in the workshop; while my fastener can be applied, repaired,
removed or replaced, owing to its accessible position, without any difficulty and at any
time with no tools beyond a bradawl and a screwdriver.
A possible objection to the arrangement as described is that it is possible in raising
the sash frame to cause a rattling noise by grating the tooth on it against the teeth on the
rack if made of metal. This I obviate by means of a strip of hard wood or other deadening
material so combined with the metal rack that the teeth shall be protected by it on the
under side. And I also attach a similar protection to the upper face of the tooth or

page_text: hook in the glass frame, so that the surfaces which, through want of care, may come
in contact in raising the sash, will not cause the metallic jarring alluded to.
The accompanying drawing shows the arrangement I prefer, but I do not confine
myself to a rack or tooth of the particular form shown. The rack may have teeth of
any suitable shape for the purpose of engaging with the tooth on the glass frame; and
the teeth may be disconnected from each other and secured separately in the form of
studs or pegs to the window frame if preferred. Similarly what I have described as a
tooth or hook on the glass frame may be of any suitable form for the purpose of
engaging with the rack on the window frame.
No. 1 is a face view of the upper corner of the glass frame with the hook or tooth
attached; and part of the window frame with the rack of metal and wood.
No. 2, is a side view of the same. The letters apply to the same parts in both cases.
A is the window frame.
B is the glass frame, sliding in.
C the groove of the window frame, slightly wider than the thickness of the glass
frame to allow space for disengaging the tooth from the rack.
D is the rack fastened by screws to the window frame.
E is a thin strip of hard wood or other non-metallic substance either under or over
the metal rack and projecting beyond it at the points underneath the teeth, to protect
their lower sides from contact with the tooth on the sash-frame.
F The tooth secured to the sash frame.
TA tooth of the rack.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed I declare that what I claim is
1. The combination of a tooth or hook on the glass frame with a rack on the side of
the window frame, not concealed in the groove, so arranged that the tooth can be
engaged with the rack or disengaged by the outward or inward pressure of the sash
frame while raising or lowering it.
2. The above described arrangement reversed by placing the hook on the window
frame and the rack on the glass frame.