Improvements in Castors for Furniture and the like.
Year: 1896

page_text: Improvements in Castors for Furniture and the like.
I, JOSEPH HENRY BETTELEY of 42 Old Broad Street in the City of London,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to certain improvements in castors for furniture and the
like, the object being to obtain, the equal distribution over the castor of the
weight to be carried,-the doing away with the ordinary pin or bolt; the balls,
rollers or plate used connecting the cup and frame of trail wheel together, and
allowing the trail roller to work freely.
In order that the nature of my invention, and the means by which the same is
affected may be particularly described and ascertained, I append to this specification
a sheet of drawings having figures and letters of reference marked thereupon, like
letters being used to denote similar or corresponding parts in each figure.
According to one construction, I form a cup or plate A, as shown in drawing
Figs. 1. to 10. which may be fitted to any article of furniture by means of a thread
formed in the inside of the cup, or by screws as in the ordinary manner.
Upon the lower portion of the outside of the cup A Fig. 1. I form a thread B,
and on the inside a groove C, constituting the segment of a ball race. Upon the
cap D. I form a corresponding thread and groove to that on the cup so that when
screwed together they form one half of a ball race as shown in Fig. 1. The top
of the trail frame E. Fig. 1. carrying a trail roller F, is grooved to correspond
with the cup A, and the cap D. and fits into the cap D through a suitable aperture
thus forming a complete ball-race in such manner that the cup, cap, & frame
become connected together by means of the balls I, which also equally distribute
the weight and allow the trail frame and roller to work freely in any direction.
Fig. 2. is a modification of Fig. 1. with the cap D. screwed inside the cup A.
Figs. 3. and 8. show another mode of carrying out this invention. I form the
cup A, and cap D in one piece; the lower portion of the inside of the cup being
grooved, forms one-half of a ball race,-the upper portion of the frame of trail
roller E. having a corresponding groove. To connect the cup and trail roller
frame together, I insert balls I. (which may be of steel or any other suitable
material) into the ball race through the opening J, which opening is then closed
by the screwed stud K.
Figs. 4. and 9. is another mode by dividing the ball race C into two equal
parts which are pressed or otherwise secured in the cap A.
Fig. 5. is another method where a double row of balls are used.
Fig. 6. is another method where the trail frame E. is a modification of Fig. 3.
The balls being kept in the ball race by one or more nuts or washers L, screwed
or rivetted to the head of trail frame E.
Fig. 7. is another method as in Fig. 10. I form the cup and cap A. D. in
one piece fitting in the top of the trail frame E. and then turning over the
edges of cup. A. D. by rivetting or otherwise to keep the trail roller bearing
in position.
Fig. 10. is a modification of Fig. 7. insomuch as the trail frame turns upon a

page_text: ball bearing, the balls_running in a ball race formed in the bottom of cap A,
and top of trail frame E.
Dated this 9th 1 of Time 1000
I JOSEPH HENRY BETTELEY of 42 Old Broad Street in the City of London,
Engineer 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 relates to certain improvements in castors for furniture and the
like, the object being to obtain, equal distribution, over the castor, of the weight
to be carried, to do away with the ordinary pin or bolt. The balls, rollers or
plate used connect the cup and frame of the trail wheel together and allows of
the trail roller working freely.
In order that the nature of my invention and the means whereby the same is
effected may be readily understood, there is appended hereto a sheet of drawings
and will refer thereto by figures and letters in the following more particular
description like letters being used to denote similar or corresponding parts.
According to one construction I form a cup or plate A. (which may be fitted
to any article) by means of a screw thread inside the cup, or by screws as in the
ordinary manner.
It should be noted that the drawings show the castors made without a central
pin but it will be obvious that the same may be adopted if deemed advisable, by
passing a screw or stem upward through a central boring or hole of the cup or
plate.
Upon the lower portion of the outside of the cup see Figs. 1, 2 and 5, there is
formed a screw thread and interiorly thereof the groove C, constituting a portion
of a ball race. Upon the cap D, Í form a corresponding thread and groove to
that on the cup, so that when screwed together they form one half of a ball race
as shown in Fig. 1. The top of the trail frame E, carrying the trail roller F, is
grooved to correspond with the cup A and the cap D, and fits into the cap D,
through a suitable aperture thus forming a complete ball race in such manner that
the cup, cap, and frame become connected together by means of the balls I, which
also equally distribute the weight and allow the trail frame and roller to work
freely in any direction.
In Fig. 2, is shown a modification of construction with the cap D screwed
inside the cup A.
In Figs. 3 and 8. (a central vertical section and a plan respectively) the cup A,
and cap D is shown made in one piece, the lower portion of the inside of the cup
being grooved to form one half of a ball race, the upper portion of the trail-frame E
having a corresponding groove.
To connect the cup and trail frame together the balls I, are inserted into the
ball race through the opening K, which is then closed by a screwed stud L, and
a washer if desired.

page_text: In Figs. 4 and 9 a further modication is shown wherein the ball race C, is formed
in two parts which are pressed or otherwise secured in the cap A.
Fig. 5 shows another construction wherein a double row of balls are used.
Fig. 6 shows a construction which is more particularly following that repre-
sented in Fig. 3. The balls I, are kept in the ball race by one or more washers
or nuts M, screwed or riveted to the head of the trail-frame E.
Fig. 7, shows the cup and cap A. D. in one piece fitting in the top of the trail
frame E, and then turning over the edges of the cup to keep the trail frame in
position. In this construction a ball race and balls are not shown but might be
applied as in the former cases or as shown in Fig. 10.
Fig. 10, shows a construction similar to that of Figs. 4 and 7 with a ball race
formed between the bottom of the cap A, and the top of trail frame E.
Fig. 11. shows the trail frame E supporting an intermediate ring N within the
cup-plate A constituting together a ball race and upon this is laid the plate A'.
This construction may be used for hand trucks.
Fig. 12 represents a castor wherein the ring piece N, and the balls I are retained
by the screw threaded jamb-ring D' in the cup A.
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 :-
First. The improvements in castors for furniture and the like constructed
combined and operating as and for the purpose herein described in reference to
and shown by the respective figures of the drawings.
Secondly. In castors as herein set forth the ball race formed intermediately of
the cup or plate A and the head of the movable trail frame the balls I, serving
both as roller bearings and connecting means between the fixed and movable
parts.
'ROL DAIRY DIC TAARAT
Dated ord March 189.
Witness-
WALTER A. BARLOW,
Consulting Engineer and Patent Expert,
306 High Holborn, London, W.C.
J. H. BETTELEY.