Improvements in Castors for Chairs, Tables, and other Articles
Year: 1895

page_text: Date of Application, 17th June, 1895
Complete Specification Left, 16th Mar., 1896-Accepted, 18th Apr., 1896:
PROVISIONAL SPECIFICATION.
[Improvements in Castors for Chairs, Tables, and other Articles...
CHARLES HENRY STANBURY. of 91 Fleet Street in the City of London
Manufacturer do hereby declare the nature of this invention to be as follows:-
"The castor I construct with the ordinary cup or plate and secure it to the leg of
a chair or other article by screws in the usual way. Passing centrally through the
cup and firmly secured thereto is a spindle having at its lower end a suitably-
shaped foot.
Beneath the cup and threaded on the spindle is a block having a lug projecting
from it on one side, this block is capable of swivelling freely around the spindle.
Pin jointed to the lug is a frame carrying at its other end an ordinary castor-
bowl.
Between the lug and the end of the frame I insert a blade or other suitably
shaped spring.
When the chair is not in use its weight is borne by the castor bowls.
Upon a person sitting on the chair his weight will overcome the springs the
chair then drops and rests firmly on the feet at the ends of the spindles, upon his
rising from the chair the springs will react lifting it and the feet from the floor..
The weight of the chair or other article will then be borne wholly by the castor
bowls, and it may now be easily moved from place to place.
I sometimes form the block and fraine in one piece and insert a spiral spring-.
between the underside of the cup and the top of the block the spindle in this case:
passing through the centre of the spiral spring.
The action in this case will be the same as that above described.
Dated this 17th day of June 1895.
C. H. STANBURY.
Improvements in Castors for Chairs, Tables, and other Articles.
I CHARLES HENRY STANBURY of 91 Fleet Street in the City of London,
Manufacturer 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 :-
The castor I construct with the crdinary cup or plate and secure it to the leg of
a chair or other article by screws in the usual way. Passing centrally through.
the cup and firmly secured thereto is a spindle having at its lower end a suitably
shaped foot.
Beneath the cup and threaded on the spindle is a block having a lug projecting
from it on one side, this block is capable of swivelling freely around the spindle.
Pin jointed to the lug is a frame carrying at its other end an ordinary castor-
bowl.
Between the lug and the end of the frame I insert a blade or other suitably
shaped spring.

page_text: pou a person SICCIDE
CATC
chair then drops and rests firmly on the feet at the ends of the spindles, upon his
rising from the chair the springs will react lifting it and the feet from the floor.
The weight of the chair or other article will then be borne wholly by the castor
bowls, and it may now be easily moved from place to place.
I sometimes form the block and frame in one piece and insert a spiral spring
between the underside of the cup and the top of the block the spindle in this case
passing through the centre of the spiral spring.
The action in this case will be the same as that above described.
Description OF DRAWINGS.
Figure 1 is a side elevation, Figure 2 is a vertical section and Figure 3 is
a horizontal section through the line 1-1 of my improved castor as shewn applied
to the leg of a chair. In this case the whole of the parts are carried by a central
spindle, but they may also be carried by the ordinary, cup secured to the chair by
screws.
a. is one leg of a chair or other article to which the castor is to be applied b is a
spindle screwed into it and carrying the different parts of the castor, c is a block
capable of revolving freely on the spindle and having on one side of it a lug c¹ to
which is pin jointed at d¹ the frame d carrying the ordinary castor bowl d³, d³ is a
cross bar connecting the two sides of the frame d. Between the lug c and the
cross har d³ is fitted the V shaped spring e tending at all times to cause the weight
of the chair or other article to be carried by the castor bowl d, f is a foot applied
to the end of the spindle b.
Upon a person sitting on the chair his weight will overcome the spring e causing
the whole of the weight to be borne by the foot applied to the central spindle and
not by the castor bowl as is usual, upon his rising the spring will react lifting the
chair and causing the weight thereof to be borne by the castor bowl as usual.
Figure 4 is a similar arrangement but in this case a spiral spring is used in place
of a V shaped spring. Similar letters refer to like parts. Figure 5 shews another
arrangement. In this case is the spindle carrying the foot f as before, g is a
block carrying the castor bowl and capable of revolving around the spindle, g¹ is
a socket and forming part of the block into this socket is placed the spiral
spring 9, is another socket screwing onto this spindle and capable of compressing
the spiral spring 92 in order to adjust the weight necessary to overcome the spring.
The action of this apparatus is the same as that before described.
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.) Castors in which at times the weight is borne by the bowls as usual and at
others by a foot applied to a central spindle.
(2.) Castors for chairs and other articles substantially as described and shewn
in the drawings.
Dated this 16th day of March 1896.
C. H. STANBURY.