IMPROVEMENTS IN THE METHOD OF PROVISIONAL SPECIFICATION
Year: 1883

page_text: LETTERS PATENT to George Thomas Cheetham of Bradford in the County of
York Coach Builder for an Invention of "IMPROVEMENTS IN THE METHOD OF
PROVISIONAL SPECIFICATION left by the said George Thomas Cheetham
at the Office of the Commissioners of Patents on the 13th January 1883.
GEORGE THOMAS CHEETHAM, of Bradford in the County of York Conch Builder
IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR LETTING DOWN CARRIAGE
WINDOWS
The object of this invention is to enable the opener of a landau carriage door
cither from the inside or outside, to lower the window in the same instant, and
thus prevents the frequent breaking of glasses in this class of carriage, and the
trouble of putting the window down when the person inside desires to get out.
Hitherto arrangements have been made for the lowering of the window in the
same instant as the door is opened from the outside, but not from the inside, nor
has the French slam lock been used for this purpose either for the opening of the
window from either the outside or the inside.
In the carrying out of my invention I use the French slam lock and adapt it for
the accomplishment of my object by the following mechanical arrangement: I
connect the tongue which actuates the bolt by means of the handle from the outside
with the lever by which the door is usually opened from the inside by means of a
connecting link. I use the ordinary apparatus for lowering the window hitherto
from the outside only. By my arrangement I can lower the window from inside
and outside the spindle of the handle actuating the mechanism passes first through
a square on the lever of the lowering apparatus and afterwards through the square
in the French slam lock the window being raised and lowered between the
mechanism and the Lock.
Instead of the inside lever projecting above the top of the door I, shorten the
same and connect a knob thereto which works in a circular slot or groove fixed in
the framework of the door.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Thomas Cheetham in the Great Seal Patent Office on
the 12th July 1883.
GEORGE THOMAS CHEETHAM of Bradford in the County of York, Coach Builder
IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR LETTING DOWN CARRIAGE
WINDOWS
The object of this invention is to enable the opener of a landau carriage door
either from the inside or outside of the carriage, to lower the window in the same
instant, and thus prevent the frequent breaking of glasses in this class of carriago,
and the trouble of putting the window down when the person inside desires to
get out.
Hitherto arrangements have been made for the lowering of the window in the
same instant as the door is opened from the outside, but not from the inside, nor
has the French slam lock been used for this purpose, either for the opening of the
window from either the outside or the inside.
In order that my invention may be fully understood, I have annexed one sheet
of drawings marked with letters of reference, corresponding letters indicating the
same parts where they appear in the various figures.
Figure 1 is an elevation of my improved apparatus shewn fitted to the framework
of a carriage door, and the connections between the lock and plate used for
dislodging the window.
Figure 2 is drawn to a smaller scale shewing the lower portion of a carriage door,
the lock being fitted on the opposite edge of the door, the additional bolt is also
shown for locking the door when the window is up, and Figure 3 is a sectional
elevation through line a. b.
The lever D is mounted on pin D¹ as fulcrum; one end of this lever is connected
by links E and E to the ordinary square spindle S, which passes through the lock
for actuating the bolt C¹ from the outside of the carriage.
To the other end of lever D is attached the rod F, to the upper end of which is
jointed the link G, which is in connection with the hinged plate J.
When the spindle S is turned in order to withdraw the bolt C' and open the
door, the links and lever before described are actuated; the rod F moving in the
direction of the arrow, thereby raising the hinged plate J into the position shewn
by Figure 1, and dislodging the window into the ordinary grooved recess below the
window opening, the window falling upon an india rubber cushion secured to tho
projecting plate H near bottom of door.
The lever A passes through a slot formed in the bolt C', and is connected by
link B to a short lever S mounted on the socket through which the square
spindle S passes.
When the door is opened from the inside, the lever A is moved towards the door
hinges thereby sliding the bolt C, the link B through short lever S', actuating the
links E and E¹ and the connections to hinged plate J, raising the same into tho
position shewn in Figure 1 and dislodging the window which falls upon the cushion
secured to the projecting plate H, and compresses the spring H¹ causing the
rod K to move in the direction of arrow Q. The rod K is coupled to bell crank
lever M, which is mounted on a stud passing through hole N: to the other end of
bell crank lever is jointed bolt P, which is withdrawn from an opening in carriage
frame when the window is lowered, thereby liberating the door which can then be
opened.

page_text: The door can be closed again with the window down, and when the window is
raised by means of an ordinary strap, the compressed spring H' elongates, allowing
the end of bolt P to project beyond the face of the door into the recess formed in
the framework of the carriage, thereby locking the door again so long as the
window is up: : thus by this arrangement, it is impossible to open the carriage door
unless the window be down, resting upon the cushion on projecting plate H.
The sliding bolt C is kept in the position shewn on drawing, by means of
spring L pressing against the short lever S'.
What I claim as my invention is:-
The combination of the links and lever D with the hinged plate J. substantially
in the manner and for the purpose as hereinbefore described, and as illustrated by
the accompanying drawings.
The combination of bell crank M. with rod K, spring H and bolt P. substantially
in the manner and for the purpose described
In Witness whereof I the said George Thomas Cheotham have hereunto set
my hand and seal this tenth day of July in the year of our Lord One
thousand eight hundred and eighty-three.
GEORGE THOMAS CHEETHAM (rs
GEORGE THOMAS CHEETHAM `(15)