Year: 1887

page_text: Date of Application, 3rd Jan., 1887
Complete Left, 27th Sept., 1887
Complete Accepted, 28th Oct., 1887
I, JAMES BIRCH GRAY, of Junce, in the Colony of New South Wales, Coachbuilder,
do hereby declare the nature of this invention to be as follows :-
This invention relates to an automatic door-holder by which the door is retained at
any position to which it has been opened and thus prevented from being blown about
by the wind or draughts. It consists of an india rubber roller which may be
spherical, centered on a spindle having bearings in the lower end of a vertical sliding
bolt, which is carried by a metal plate fixed on the lower part of the door. The
vertical bolt is urged downwards by a spring so that the roller is pressed on the floor
along which it rolls as the door is moved. An adjustable brake bears upon the roller
and prevents it from running too freely. This brake consists of a lever mounted on
the vertical bolt, having its lower end widened to bear against the roller and its upper
end held by a thumb-screw to the vertical bolt. At the point where the door is open to
the full extent desired, a projection or shallow ledge may be fixed on the floor. The
roller riding over this ledge holds the door firmly but not with such force as to prevent
the door from being moved by hand.
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improved Automatic Door' Holder.
I, JAMES BIRCH GRAY, of Junee, in the Colony of New South Wales, Coachbuilder,
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:
This invention of an improved automatic door holder is secured upon the face of the
door near its bottom end so that by it the door is retained at any position to which it
has been opened and thus prevented from being blown about by the wind or draughts.
It consists of an india rubber roller, spherical or otherwise centred on a spindle having
bearings in the lower bowed end of a vertical sliding bolt or bar which is movably
supported on a metal plate furnished with holes for wood screws by means of which
it is secured to the door. At the upper end of the vertical bolt is a cross head to each
end of which on either side of the central bolt are attached the ends of a coiled or
spiral spring the other ends of which are affixed upon the stationary plate consequently
such springs are always drawing the bolt downwards. An adjustable brake is also
devised to press upon the spherical roller and prevent its running too freely upon the
floor. This brake is in the form of a lever having its end which abuts against the
roller widened out to give it surface while its upper end has a hole in it to receive a
thumb screw which is screwed into the vertical bolt to which such lever is centred
just above the crown of its bow end. At the point where the door is open to the full
desired extent a projection or shallow ledge is sometimes secured upon the floor over
which the roller rides and when once over it the door is firmly held at such position, it
being again readily closed by drawing the door to as ordinarily.
Referring to the drawings.
Figure 1 is a front elevation, and
Figure 2 is a side elevation of the improved automatic door-holder.
In these Figures A is the sliding bolt, A¹ its bow end, and A³ its cross-head. Bare
the bearings for the sliding bolt rivetted to the plate B₁ which is secured to the face of
the door by wood screws B².. C are the coiled or spiral springs attached to the cross
head at Cand secured to the plate B¹ at C. D is the brake lever centred at D' to
the face of the how A¹ and having at its upper end a hole through which the thumb
screw D² passes and which thumb screw is screwed into the sliding bolt A. The lower
end D³ of the brake is widened and abuts against the spherical india-rubber roller B³
which is preferably bushed with a brass bearing B' and is centred within the bow A*
upon the transverse pin B*.

page_text: 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 lever brake furnished with an adjusting thumb screw and centred upon the
sliding bar of automatic door-holders substantially as described and illustrated."
2. The automatic door holder consisting essentially of the sliding bar, coiled springs,
supporting plate and bearings, india rubber roller and brake lever substantially as
herein described and illustrated.
11
100л
Dated this 27th September 1887.
JAMES BIRCH GRAY.
ABEL & IMRAY,
Agents for the Applicant.