IMPROVEMENTS IN LOCKS OR FASTENINGS FOR CARRIAGE DOORS
Year: 1875

page_text: LETTERS PATENT to Arthur Bilbrough, of 36, Fenchurch Street, in
the City of London, for the Invention of "IMPROVEMENTS IN LOCKS
OR FASTENINGS FOR CARRIAGE DOORS."
Scaled the 25th June 1875, and dated the 28th April 1875..
PROVISIONAL SPECIFICATION left by the said Arthur Bilbrough at
the Office of the Commissioners of Patents, with his Petition, on
the 28th April 1875.
I, ARTHUR BILBROUGH, of 36, Fenchurch Street, in the City of
London, do hereby declare the nature of the said Invention for “IM-
PROVEMENTS IN LOCKS OR FASTENINGS FOR CARRIAGE DOORS," to be as follows:-
:-
The object of the Invention is to prevent accidents arising from
carriage doors flying open through the inner handle being inadvertently
pressed downwards.
According to this Invention I construct the lock or fastener for
carriage doors in such manner that when the door is shut the inner
handle shall hang down, and must be pressed upwards to open the door,

page_text: while at the same time the action of the outer handle is the same as
under the old system. This may be effected by forming a circular
toothed rack at the back of the axis of the bolt or catch to gear with a
pinion having upon its axis the handle for fastening or unfastening the
door from the inside.
The handle for fastening or unfastening the door from the outside is
fixed upon the axis of the bolt or catch as heretofore.
The spring which is to retain the bolt or catch in either its open or
closed position may act upon its back end, either on one or both sides of
the circular toothed rack formed upon it, as before mentioned.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Arthur Bilbrough in the Great Seal Patent Office
on the 28th October 1875.
'
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ARTHUR
BILBROUGH, of 36, Fenchurch Street, in the City of London, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-eighth day of April, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Arthur Bilbrough, Her special
license that I, the said Arthur Bilbrough, my executors, administrators,
and assigns, or such others as I, the said Arthur Bilbrough, my exe-
cutors, administrators, and assigns, should at any time agree with, and
no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN LOCKS OR FASTENINGS FOR CARRIAGE DOORS," upon the condition (amongst
others) that I, the said Arthur Bilbrough, my executors or admini-
strators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent

page_text: Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Arthur Bilbrough, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :-
The object of the Invention is to prevent accidents arising from
carriage doors flying open through the inner handle being inadvertently
pressed downwards.
According to this Invention I construct the lock or fastener for
carriage doors in such manner that when the door is shut the inner
handle will have to be pressed upwards to open the door, while at the
same time the action of the outer handle is the same as under the old
system. This may be effected by forming a circular toothed rack at the
back of the axis of the bolt or catch to gear with a pinion having upon
its axis the handle for fastening or unfastening the door from the
inside.
The handle for fastening or unfastening the door from the outside is
fixed upon the axis of the bolt or catch as heretofore.
The spring which is to retain the bolt or catch in either its open or
closed position may act upon its back end, either on one or both sides of
the circular toothed rack formed upon it as before mentioned.
Figures 1 and 2 shew side views of a carriage door lock constructed
as above described. Figure 1 shews the lock with its bolt or catch with-
drawn within the casing of the lock, whilst Figure 2 shews 'the
bolt projecting from it and in position for fastening the door which
carries it.
Figure 3 shews a front view of the lock when open, that is, with the
bolt withdrawn.
In these Figures A is the casing of the lock; B, the bolt or catch
turning upon a spindle at B', and having the outer handle C applied to
this spindle, as in ordinary carriage door locks, but in place of the
handle D on the inside of the door being also applied to this spindle as
heretofore this handle is applied to a spindle E, which gears with the
spindle B', as shown, so that to withdraw the bolt by the inner handle

page_text: this handle requires to be turned upwards, whilst to withdraw the bolt
by the outer handle the outer handle is turned in the ordinary direction
as heretofore; F is a spring carrying at its end a tooth to engage with
the teeth on the spindle B', and retain the bolt in its open or closed
position:
Having thus described the nature of my Invention and the manner of
performing the same, I would have it understood that I claim con-
structing locks or fastenings for carriage doors as herein-before described,
in such manner that to open the door by the inner handle this handle
has to be moved upwards, whilst the action of the outer handle is not
interfered with, and is the same as heretofore usual.
In witness whereof, I, the said Arthur Bilbrough, have hereunto
set my hand and scal, this Twenty-seventh day of October, in
the year of our Lord One thousand eight hundred and seventy-
five.
ARTHUR BILBROUGH. (L.S.)