AN IMPROVED QUADRANT CONCEALED HINGE FOR CARRIAGE DOORS
Year: 1878

page_text: LETTERS PATENT to William Pavely, of 134, Seymour Place, Bryanston
Square, in the County of Middlesex, for the Invention of "AN IMPROVED
QUADRANT CONCEALED HINGE FOR CARRIAGE DOORS."
Sealed the 20th December 1878, and dated the 8th October 1878.
PROVISIONAL SPECIFICATION left by the said William Pavely at the Office
of the Commissioners of Patents on the 8th October 1878.
WILLIAM PAVELY, of 134, Seymour Place, Bryanstone Square, in the County
of Middlesex. "AN IMPROVED QUADRANT CONCEALED HINGE FOR CARRIAGE
DOORS."
This Invention consists of an improved quadrant concealed hinge for carriage
doors and other similar purposes; and my Invention consists in making one-half of
the hinge with a sharp elbow bend to form a firm stop, and the curve part of the
same half of small radius and true concentric with pin of hinge.
I supersede the necessity of a large opening, such as is required in the forms of
concealed hinges at present in use, by so constructing the half of the hinge fastened
to the door that the curved part of the same is truly concentric with the pin of the
hinge. By so constructing this part of the hinge in whatever position the same may
be placed the opening in the other half of the hinge only requires to be of just
sufficient width to take freely the width of the bow, and therefore there is not, as
in the form of concealed hinges at present in use, a large part of the opening left
uncovered through which dirt and water get access to the post of the door frame to
rot the same or to rust the pin of the hinge.
Secondly. I give to that half of the hinge attached to the door (in that part

page_text: between the curved portion and the pin end) a sharp elbow turn, the bed of which
elbow forms such a firm stop to the door that except by very unfair usuage the door
cannot be opened beyond its proper extent, namely, at right angles to the frame.
Thirdly. As the radius of the curved part is small and has no cover piece on it, it
does not require for its action so great a cavity cut in the pillar of the door frame
as the forms of concealed linges at present in use; this gives my hinge the
advantage of having more strength in the pillar or post of the door frame.
Fourthly. The quarter of an inch clearance required between the bow of the
hinge and the quarter panel gives a much less probability of the frame of door
being injured than with the present hinge.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Pavely in the Great Seal Patent Office on the 10th January
1879.
WILLIAM PAVELY, of 134, Seymour Place, Bryanstone Square, in the County
of Middlesex. "AN IMPROVED QUADRANT CONCEALED HINGE FOR CARRIAGE
|DOORS."
My Invention relates to an improved quadrant concealed hinge for carriage doors
and other similar purposes, and consists in making one portion of the hinge with a
sharp elbow bend to form a firm stop, and the curved part of the same portion of
small radius and concentric with the pin of the hinge.
The necessity of a large opening, such as is required in the forms of concealed
hinges at present in use, is obviated by so constructing the portion of the hinge
fastened to the door that the curved part of the same is truly concentric with the
pin of the hinge. By so constructing this part of the hinge, in whatever position
the same may be placed, the opening in the other portion of the hinge only requiros
to be of just sufficient width to take freely the width of the bow, and therefore
there is not, as in the form of concealed hinges at present in use, a large part of the
opening left uncovered, through which dirt and water get access to the post of the
door frame to rot the same or to rust the pin of the hinge.
Secondly: I give to that portion of the hinge fastened to the door (in that part
between the curved portion and the pin end) a sharp elbow turn, the bed of which
elbow forms such a firm stop to the door that, except by very unfair usage, tho
door cannot be opened beyond its proper extent, namely, at right angles to the
frame.
Thirdly. As the radius of the curved part is small and has no cover piece on it, it
does not require for its action so great a cavity cut in the pillar of the door frame
as the forms of concealed hinges at present in use; this gives my improved hinge
the advantage of having more strongth in the pillar or post of the door frame.
Fourthly. The quarter of an inch clearance required between the bow of the
hinge and the quarter panel gives a much less probability of the frame of the door
being injured than with the present hinge.
Having thus stated the nature of the said Invention, I will proceed to describe
more particularly in what manner the same is to be performed by the aid of the
accompanying Drawings, in which is represented a hinge constructed in the manner
herein-hefore referred to

page_text: the further opening of the door. The said part of the metal fixture is one side of
the slot through which the bow of the hinge works, and it is suitably formed for
the said portion or elbow of the hinge to abut against, as shewn,
From the foregoing description the form and construction of the hinge will be
readily understood as fulfilling the conditions and effecting the improvements
herein-before stated and referred to.
Having thus described the nature of the said Invention, and in what manner the
same is to be performed, I hereby declare that what I claim as of my Invention is,
the improved form and construction of the quadrant concealed hinge for carriage
doors, as represented and described.
In witness whereof, I, the said William Pavely, have hereunto set my hand
and seal, the Third day of January, in the year of our Lord One thousand
eight hundred and seventy-nine.
Witness,
FRED. H. GREEN,
WILLIAM PAVELY. (L.S.)
134, Seymour Place, Bryanston Square,
Coach Body Maker.
53, Park Street, Grosvenor Square, W.,
Commercial Clerk,