IMPROVEMENTS IN THE CONSTRUCTION OF GLASS KNOBS FOR DRAWERS AND Deans
Year: 1872

page_text: LETTERS PATENT to William Harrison, of Porter Island Works,
Arundel Street, Sheffield, in the County of York, for the Invention
LETTERS PATENT to William Harrison, of Porter Island Works,
Arundel Street, Sheffield, in the County of York, for the Invention
of IMPROVEMENTS IN THE CONSTRUCTION OF GLASS KNOBS FOR DRAWERS AND
Deans "
Sealed the 25th April 1873 and dated the 29th October 1872.
PROVISIONAL SPECIFICATION left by the said William Harrison at
the Office of the Commissioners of Patents, with his Petition, on
the 29th October 1872.
I, WILLIAM HARRISON, of Porter Island Works, Arundel Street,
Sheffield, in the County of York, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF GLASS KNOBS FOR
DRAWERS AND DOORS," to be as follows:-
The mode at present practised in the construction of glass knobs is to
make the screwed part thereof very large and conical, and to screw
such said conical part into a plain parallel hole made in the wood of
the drawer or door, the objection to which is that the screwed part of
the knob only holds by two or three threads cut thereby in the wood

page_text: at the largest part of the said screw, so that in use, the wood being soft,
in the act of pulling open a drawer, for example, the wood threads give
way and the knob comes out.
I propose to remedy this objection by making the screwed part of the
knob cylindrical and very much smaller than the conical screwed part
above mentioned, and instead of screwing the knob into the wood of a
drawer or door I pass it through a plain hole in the drawer or door,
and screw a wood nut on that part of the said screwed part which
projects inside the drawer or door, and further in order to prevent the
knob being detached from the wood nut (except when required) I make
a slit across the end of the screwed part of the knob, and pass a piece
of wire through holes in the aforesaid nut, the middle portion of the
wire locking into the slit in the end of the screw; or a hole may be
made through the glass as well as the wood nut for that purpose.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Harrison in the Great Scal Patent Office
on the 29th April 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
HARRISON, of Porter Island Works, Arundel Street, Sheffield, in the
County of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-ninth, day of October, in the
year of our Lord One thousand eight hundred and seventy-two, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said William Harrison, Her
special licence that I, the said William Harrison, my executors, admi-
nistrators, and assigns, or such others as I, the said William Harrison,
my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN THE CONSTRUCTION OF GLASS KNOBS FOR DRAWERS AND
DOORS," upon the condition (amongst others) that I, the said William
Harrison, my executors or administrators, by an instrument in writing
32

page_text: under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Harrison, do hereby
declare the nature of my said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement, that is to say:-
The mode at present practised in the construction of glass knobs is
to make the screwed part thereof very large and conical, and to screw
such said conical part into a plain parallel hole made in the wood of the
drawer or door, the objection to which is that the screwed part of the
kuob only holds by two or three threads cut thereby in the wood at
the largest part of the said screw, so that in usc, the wood being soft,
in the act of pulling open a drawer, for example, the wood threads give
way and the knob comes out.
I propose to remedy this objection by making the screwed part of
the knob cylindrical and very much smaller than the conical screwed
part above mentioned, and instead of screwing the knob into the wood
of a drawer or door I pass it through a plain hole in the drawer or door,
and screw a wood nut on that part of the said screwed part which
projects inside the drawer or door, and further in order to prevent the
knob being detached from the wood nut (except when required) I make
a slit across the end of the screwed part of the knob, and pass a piece
of wire through holes in the aforesaid nut, the middle portion of the
wire locking into the slit in the end of the screw, or a hole may be
made through the glass as well as the wood nut for that purpose.
And in order to explain my said Invention more fully, I now proceed
to describe the means by which it may be carried into practical effect,
reference being had to the illustrative Sheet of Drawings accompanying
these Presents, and to the numeral figures and letters of reference
marked thereon respectively, as follows:-
:-

page_text: it would appear when applied and fixed to a drawer or door; Figure 3
is a wood nut in front elevation; Figures 4, 5, 6, represent similar views
of a glass knob shewing an arrangement for preventing the knob from
becoming accidentally detached from a drawer or door after it has been
affixed thereto. At each of the above-mentioned Figures similar letters
of reference are employed to denote corresponding parts.
A, a, marks the glass knob B, the drawer or door shewn in section,
a cylindrical hole being made in B to allow the screwed part a of the
knob to be passed through the said hole; C is a wood nut screwed on
to a for securely fixing the knob to the drawer or door. In order to
prevent the nut C from becoming accidentally unscrewed and detached
from the knob I form a slit 6 in the part a of the knob as at Figures 4
and 5; I also form holes through the nut C, and when the said nut
has been screwed tightly on the screwed part a of the knob I then pass
a pin c through the holes in the nut, and the slit 6 by which I prevent
the nut from becoming accidentally unscrewed and detached from the
knob.
Having now fully described and set forth the nature and object of
my said Invention for "Improvements in the Construction of Glass
Knobs for Drawers and Doors," and the means by which it may be
effected, I hereby declare my Invention to consist in and I claim con-
structing and connecting glass knobs to drawers and doors in the
manner above described with reference to the accompanying Drawing.
In witness whereof, I, the said William Harrison, have hereunto
set my hand and seal, this Twenty-ninth day of April, in the year 1
of our Lord One thousand eight hundred and seventy-three.