Improvements in Door-knob Furniture.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Door-knob Furniture.
We, RUDOLPH HERMANN MCHARDY, of 44, Queen's Road, Bayswater, Engineer,
JAMES MCHARDY, of 83, Talgarth Road, West Kensington, Musician, and DAVID
STANLEY FROY, of The Brunswick Works, Hammersmith, Merchant, do hereby
declare the nature of this invention to be as follows:-
This invention which relates to improvements in door-knob furniture consists.
mainly in providing a split spindle by means of which all adjustment and rigidity
may be readily accomplished. We are aware that split spindles have already
been used in various forms, but they have all been accompanied by such imperfec-
tions as we profess to avoid. Instead of dividing the square spindle in a line
parallel to the sides of the square, we propose to form the square by two inde-
pendent triangular pieces. The square or its equivalent is thus, so to speak, split
diagonally. In each of the herein beforementioned triangular pieces we provide
a threaded hole (at or about the ends of the said pieces) (The said threaded hole
is vertical to the base of the triangle) A pinch screw, revolving freely in a suitable
hole in the door-knob (or its equivalent) engages, in the threaded hole, the trian-
gular half of the spindle. Each of the knobs being thus supplied with one half
of the split (square or its equivalent) spindle, it is manifest that each of the said
triangular pieces may be inserted base to base in the square hole of the lock and
the square holes of the knobs. While the pinch-screws do not protrude beyond
the surface of the the bases of the triangular pieces, the knobs may be pushed in
towards each other and thus adjusted to perfection. On tightening the pinch
screw or screws, the triangles will be forced apart and fit themselves exactly in
the knob-holes prepared to receive them. It will be seen that, in our invention
the pressure which retains the knobs, will be equally divided on all sides of the
square hole, making the parts perfectly rigid, whereas, split spindles of any other
shape, admits of some degree of looseness, besides involving extra expense in
making and inserting. It will also be clear that so long as we make our division
of the spindle somewhat, although not exactly diagonal we shall attain approxi-
mately the same advantages.
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RUDOLPH HERMANN MCHARDY,
JAMES MCHARDY.
DAVID STANLEY FROY.

page_text: We, RUDOLPH HERMANN MCHARDY, Engineer, of 44, Queen's Road, Bayswater,
JAMES MCHARDY, Teacher of Music, of 83, Talgarth Road, West Kensington, and
DAVID STANLEY FROY, Merchant, of The Brunswick Works, Hammersmith,
London, 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 door-knob furniture, and has for
object to provide a split-spindle by means of which all the necessary adjustment
and rigidity may be readily accomplished.
We are aware that split spindles have already been used in various forms, but
they have all been accompanied by such imperfections as to render them inopera-
tive.
'
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Reference is to be had to the accompanying sheet of illustrative drawings
forming a part of this specification, in which:
Fig. 1 is a side elevational view of a spindle and door-knob constructed in
accordance with our invention, the said knob being shown in section, while
Fig. 2 is a section taken through line a, .
Referring to the drawings, a al represent the two halves of the spindle, which
is split longitudinally in a diagonal manner so as to provide two independent
triangular pieces.
Heretofore spindles of the split variety have been divided in a line parallel to
the sides of the square. In each of the two triangular halves a a¹, I provide a
tapped, or internally threaded hole 661 at or about the end of the respective
halves a a¹. The said tapped or internally threaded holes are vertical to the
bases of the triangles formed by the halves of the spindle a a¹.
Pinch screws care provided, which revolving freely in suitable openings c
in the door-knobs dd, engage in the tapped or internally threaded holes 66¹ in
the triangular halves of the spindle. Each of the knobs dd being thus supplied
with one half of the split spindle, it is obvious that each of the said triangular
halves may be inserted, base to base in the square hole of the lock (not shewn)
and the square openings e e¹ of the door knobs d d.
While the pinch-screws c do not protrude beyond the surface of the bases of the
triangular halves a a¹, the knobs àd may be pushed in towards each other and
thus perfectly adjusted.
On tightening the pinch-screw or screws c, the triangular halves a a¹ will be
forced apart and fit themselves exactly in the knob-holes dd prepared to receive
them. It will be seen that in our invention the pressure which retains the knobs
will be equally divided on all sides of the square-hole, making the parts per-
fectly rigid, whereas split-spindles of any other shape admit of some degree of
looseness besides involving extra expense in making and inserting. It will also
be clear that so long as we make our division of the spindle somewhat, although
not exactly diagonal, we shall attain approximately the same advantages.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
In door-knob furniture, the spindle divided longitudinally to form two halves
of a triangular shape in section, and having each a tapped opening at the opposite
ends to one another, in which pinch-screws work to abut against the flat opposing

page_text: surfaces of said triangular halves, said pinch-screws passing through vertical
openings in the door-knobs, substantially as specified.
Dated this 26th day of May 1898.
HUGHES, SON, & Co.,
38, Chancery Lane, London, W.C., Agents for the Applicants.