Improvements in Furniture
Year: 1899

page_text: I, GEORGE MASON, of 56, Belgrave Road, Edgbaston, in the City of Birmingham,
Works Manager, do hereby declare the nature of this invention to be as follows;-
This invention relates to improvements in castors for furniture and the like,
and refers more particularly to the carrying of the horn upon the pivot pin, and the
securing of the whole to the leg &c. of the furniture.
It consists as follows;-The horn and its roller are as usual. I make the pivot
pin to pass upwards through the bearing hole in the horn, and having an enlarged
head with screwdriver nick or the like, by which it may be screwed up. Upon
the barrel part of the pivot pin is placed a tubular sleeve, of a length equal to
about the depth of the horn bearing (more or less). The said pivot pin is there-
abouts screwthreaded with a left hand thread for a short distance, from whence
to the end it may be formed with an ordinary wood screw thread, or otherwise
treated, to engage direct into the leg &c. of the furniture or to accommodate
tubular barrels or other usual devices prepared to receive it. Upon the pin and
adjoining the aforesaid sleeve is placed a conical washer (or if desired such two
may be in one piece), and at the back of the washer comes the left hand screw
nut plate, by which the pin, the sleeve, and the washer are firmly secured to each
other, but permitting a freely revolving action to the horn thereon.
It will be now seen that by screwing the remaining end of the pin into the leg,
the screw nick &c. in the head can be employed, and in so doing the screw nut
plate rests firmly against the bottom of leg, when pins or screws may be passed
therethrough into the said leg to prevent unscrewing, and thus the two threads
lock each other.
Both screws may be right handed with the parts arranged in the improved
manner stated, but the two dissimilar threads are preferred.
CHARLES T. POWELL,
Applicant's Agent.
Improvements in Furniture Castors.
I, GEORGE MASON, of 56, Belgrave Road, Edgbaston, in the City of Birmingham,
Works Manager, 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 improvements in castors for furniture and the like,

page_text: ל
and refers more particularly to the carrying of the horn upon the pivot pin, and the
securing of the whole to the leg &c. of the furniture.
In order to more particularly explain this my invention I have appended here-
unto an illustrative drawing upon which are figures and numbers of reference,
similar numbers referring throughout to the same thing or part.
Fig. 1, is a general sectional side view of a castor made according to this my
invention.
Figs. 2, 3 and 4, show several modifications of parts.
5, is the horn, carrying roller 6, and 7, is the leg of the furniture &c. The
horn 5, and its roller 6, are as usual. I make the pivot pin 8, to pass upwards
through the bearing hole in the horn 5, and having an enlarged head 9, with
screwdriver nick or the like. by which it may be screwed up. Upon the barrel
part of the pivot pin is placed a tubular sleeve 10, of a length equal to about the
depth of the horn bearing (more or less). The said pivot pin is thereabouts
screwthreaded with a left hand thread 11, for a short distance, from whence to
the end it is formed with an ordinary wood screw thread 12. Upon the pin 8, and
adjoining the aforesaid sleeve is placed a conical washer 13, or if desired the
sleeve 10 and washer 13, may be in one piece as seen in Fig 2, and at the back
of the washer 13, comes the left hand screw nut plate 14, by which the pin, the
sleeve, and the washer are firmly secured to each other, but permitting a freely
revolving action to the horn thereon.
In some cases I may form the sleeve portion upon the pin 8 itself, as seen at 10",
in Fig. 3, and further if desired, I may form the conical washer, and the screw
nut plate in one piece as seen in Fig. 4.
It will be now seen that by serewing the upper end of the pin 8, into the leg 7,
the screw nick &c. in the head 9, can be employed, and in so doing the screw
nut plate 14, rests firmly against the bottom of leg, when pins or screws may be
passed therethrough at 15, into the said leg to prevent unscrewing, and thus the
two threads 11, and 12, lock each other..
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what
I claim is-
1. In a castor, the use of a right and left hand screwthread device, the one
being for securing the pivot pin and its bearing to the horn, and the other for
attachment of castor to leg of furniture, the one thereby acting as a lock to the
other, substantially as set forth and shown.
Dated 14+1
T
1000
CHARLES T. POWELL,
Applicant's Agent, 158, Edmund Street, Birmingham.