Improved Means for Pivotting Doors.
Year: 1898

page_text: Improved Means for Pivotting Doors.
We, HENRY JOHN CARTER, and JAMES AYNSLEY, trading as Carter & Aynsley,
of 54, Bishopsgate Street, Without, in the City of London, Brass Founders, do
hereby declare the nature of this invention to be as follows:-
According to this invention the door is provided at the top and bottom with
pins or pivots working in ball bearings so arranged that the balls of the lower
bearing take the weight and those of the upper bearing the sideway thrust.
The lower bearing is a footstep having in it a cylindrical hole with a groove
around its bottom containing a ring of balls.
The pivot is a cylinder fitting the hole and resting on the balls it being suit-
ably grooved to receive them.
The upper bearing is made in two parts. One part has a hole through it in the
form of two co-axial cylinders of different diameters the lower portion of the
hole being smaller than the upper portion. On the top edge of the lower cylinder
a groove is formed to receive a ring of balls. The other part of the bearing is a
cap with a hollow cylindrical stem the internal diameter of which is the same
as the lower or smaller portion of the hole in the other part whilst its external
diameter is the same as that of the upper or larger portion into which the stem
is screwed or otherwise fixed. The bottom edge of the stem is grooved and rests
on the balls. The latter are of such a size that they project slightly inwards
beyond or lie flush with the internal surfaces of the stem and lower part of the
hole.
Dated this 28th day of April 1898.
HENRY JOHN CARTER.
JAMES AYNSLEY.
We, HENRY JOHN CARTER and JAMES AYNSLEY, trading as Carter & Aynsley,
of 54, Bishopsgate Street Without, in the City of London, Brass Founders, 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:-
According to this invention the door is provided at the top and bottom with
pins or pivots working in ball bearings so arranged that the balls of the lower
bearing take the weight and those of the upper bearing the sideway thrust.

page_text: The lower bearing, Figures 1, 2 and 3, is a footstep a having in it a cylindrical
hole with a groove a¹ around its bottom containing a ring of balls b.
The pivot c is a cylinder fitting the hole and resting on the balls it being suit-
ably grooved to receive them. The pivot c is preferably made in one piece with
the casting which fits onto the corner of the door.
The upper bearing Figure 4 is made in two parts. One part e has a hole
through it in the form of two co-axial cylinders of different diameters, the lower
portion of the hole being smaller than the upper portion. On the top edge of
the lower cylinder a groove is formed to receive a ring of balls f. The other
part of the bearing is a cap with a hollow cylindrical stem g¹ the internal diam-
eter of which is the same as the lower or smaller portion of the hole in the other
part whilst its external diameter is the same as that of the upper or larger portion
into which the stem is screwed or otherwise fixed. The bottom edge of the stem
is grooved and rests on the balls. The latter are of such a size that they project
slightly inwards beyond or lie flush with the internal surfaces of the stem and
lower part of the hole.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
1
Means for pivotting doors substantially as described and illustrated in the
drawings.
Dated this 26th day of Januar 1800.
HENRY JOHN CARTER.
JAMES AYNSLEY.