Year: 1895

page_text: I, DAVID HUNT, Physician, of 413 Boylston Street, Boston, County of Suffolk,
and State of Massachusetts, United States of America, do hereby declare the
nature of this invention to be as follows:-
This invention has for its object to improve and simplify the construction of ball
castors, and consists in certain details of construction as will be hereinafter fully
set forth and described.
The retaining plate made circular or of other desired shape, is cast around the
head or end of a wood screw, and said plate has formed on its underside several
projections there being four, arranged at equal distances apart, which may be
engaged by an ordinary monkey wrench, and by means of such tool turned to screw
the plate to a leg or other part to which the castor is to be applied. These
projections may be made quite short.
The plate has also formed upon its underside slightly projecting ball seats, made
as projections having more or less curved faces, and there may be three or more of
these projecting seats as desired, although I have herein described four.
The ball rests upon the ball seats. To hold the ball in place I have provided a
metallic ferrule of suitable diameter to snugly embrace the retaining plate, and of
suitable length to enclose said plate together with the ball, the lower open end of
said ferrule being inturned to form a shoulder to retain the ball in place.
To prevent the ferrule being driven on too far, so as to bind upon the ball,
I have formed its upper end, for a short distance, with straight parallel sides which
embrace the plate, and from such point said ferrule is made more or less tapering
to the end.
At the point where the ferrule begins to taper a shoulder or contraction 'is
thereby formed which bears against the bottom of the plate and forms a stop which
limits further movement of the ferrule on the plate.
It will be observed that by providing four projections arranged around the plate
at equal distances apart, an ordinary monkey wrench, may be employed to screw
the plate to a leg, or if desired a pin or bar may be placed between any two
opposite projections on the plate to thereby screw the plate into the leg.
The plate may be applied in this manner if desired, although in certain instances
the projections may be engaged by the fingers, and the plate thereby screwed on.
The plate having been secured in position, the ball will be held in place against
the ball seats and the ferrule driven on.
Dhin 20th day of Jul 1895
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.

page_text: Improvements in Ball Castors.
I, DAVID HUNT, Physician, of 413 Boylston Street, Boston, County of Suffolk,
and State of Massachusetts, United States of America, 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 has for its object to improve and simplify the construction of ball
castors, and consists in certain details of construction as will be hereinafter fully
set forth and described.
In the accompanying drawing
Figure 1, shows in side elevation a ball castor embodying this invention.
Figure 2, a vertical section of the same.
Figure 3, an underside view of the retaining plate, showing the ball seat and
means for applying the retaining plate.
The retaining plate a made circular or of other desired shape, is cast around the
head or end of a wood screw 2, and said plate has formed on its underside several
projections a', there being four herein shown, arranged at equal distances apart,
which may be engaged by an ordinary monkey wrench as represented in Figure 3,
and by means of such tool turned to screw the plate a to a leg or other part
to which the castor is to be applied. These projections a¹ may be made quite
short.
The plate a has also formed upon its underside slightly projecting ball seats a³,
made as projections having more or less curved faces, and there may be three or
more of these projecting seats as desired, although I have herein shown four.
The ball rests upon the ball seats a². To hold the ball b in place I have
provided a metallic ferrule c of suitable diameter to snugly embrace the retaining
plate a, and of suitable length to enclose said plate together with the ball b, the
lower open end of said ferrule being inturned as at c' to form a shoulder to retain
the ball in place.
To prevent the ferrule c being driven on too far, so as to bind upon the ball,
I have formed its upper end, for a short distance, with straight parallel sides which
embrace the plate a', and from such point as at 3 for instance said ferrule is made
more or less tapering to the end.
At the point where the ferrule begins to taper a shoulder or contraction is
thereby formed which bears against the bottom of the plate a, and forms a stop
which limits further movement of the ferrule on the plate.
It will be observed that by providing four projections arranged around the
plate a at equal distances apart, an ordinary monkey wrench, see Figure 3, may be
employed to screw the plate to a leg, or if desired a pin or bar may be placed
between any two opposite projections on the plate to thereby screw the plate into
the leg..
The plate may be applied in this manner if desired, although in certain instances
the projections may be engaged by the fingers, and the plate thereby screwed on.
The plate having been secured in position, the ball will be held in place against
the ball seats and the ferrule driven on.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The ball castor herein described, consisting of the plate a, having several
projections a¹, and also several ball seats a², the screw 2, ball b, and ferrule
substantially as described.
C,
2. The ball castor herein described, consisting of the plate a, having several

page_text: projections a¹, and also several ball seats a², the screw 2, ball b, and ferrule c,
having a short portion with straight parallel sides and a tapering end portion,
substantially as described.
3. A ball castor having a retaining plate a. provided with several like projec-
tions a¹, arranged at equal distances apart, substantially as described.
4. A ball castor having a retaining plate a, provided with several like projec-
tions a, arranged opposite each other, and the screw 2 cast into the plate,
substantially as described.
Dated this 20th day of April 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.