Year: 1890

page_text: Date of Application, 30th July, 1890
'Complete Specification Left, 28th Jan., 1891-Accepted, 7th Mar., 1891
I, WILLIAM LOCKHART MORTON, residing at South 1 arra, near the City of
Melbourne, in the Colony of Victoria, Australia, Gentleman, do hereby declare the
nature of this invention to be as follows:
:—
The object of my invention is to provide a simple and permanently effective door
knob attachment by means of certain new and useful improvements in the con-
struction of the knob and spindle.
In some other inventions washers are required in order that the knob may be
readily adjustable to suit doors of different thicknesses but in this invention this
object is effected without washers.
Referring to the accompanying drawings which illustrate my invention and form
a part of this Specification.
Figure 1 shows a view partly in longitudinal central section of a door knob and
spindle secured together.
Figure 2 shows an elevation of the outer face or head of the knob.
Figures 3 and 4 shows sectional views of alternative forms of flanged nuts as
secured to the spindle.
Referring to Figure 1 a shows the knob & the spindle c a socket nut the door
f the rose.
In this invention 1 provide a square spindle having at its end a cylindrical
portion of reduced diameter. The cylindrical portion of reduced diameter is
threaded with a left hand male screw shown by e in drawings and the adjoining
square portion of the spindle of full diameter is threaded at its corners with a right
hand male.screw thread shown by d in drawings.
When the spindle has been passed through the door both the threaded parts are
projecting more or less according to the thickness of the door, the case shown in
Figure 1 being that of a thin door. The knob shank is internally threaded with a
right hand thread shown by a' in Figure 1 to screw on to the thread d of the
spindle until the knob meets the rose. The object of reducing the diameter of the
spindle at e is to enable it to pass through the knob shank.
The head of the knob has an averture with countersunk or beveled edges and
through this aperture I pass a socket mute with a screw driver head having a left
handed female thread et on drawings which I screw on to the end of the spindle
until the head of the socket nut is screwed tight home to the knob thus closing the
aperture therein. It is now impossible for the knob to work itself loose or become
shaky on the spindle by the wear and tear of constant use.
It is not necessary to make the male thread at d right handed and that at c left
handed with corresponding female threads on the knob shank and socket nut
respectively as the thread at d may be left handed and at e right handed so long as
one is the reverse of the other to ensure that any tendency of the knob to screw off
will be checked by the refusal of the socket nut to screw in the same lirection so
that the head of the socket nut always holds the knob securely.
Instead of having a screw driver head the head of the socket nut may be square
or polygonal and be turned by a spanner and may project from the knob face
instead of having its edges flush with it, these forms being severally indicated in the
drawings.
Dated this Twenty-second day of May 1890.
WILLIAM LOCKHART MORTON
Abel & Imray,
Agents for the Applicant.

page_text: Improvements in Door Knob Attachments.
I, WILLIAM LOCKHART MORTON, residing at South Yarra, near the City of
Melbourne, in the Colony of Victoria, Australia, Gentleman. 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 object of my invention is to provide a simple and permanently effective door
knob attachment by means of certain new and useful improvements in the con-
struction of the knob and spindle.
In some other inventions washers are required in order that the knob may be
readily adjustable to suit doors of different thicknesses but in this invention this
object is effected without washers.
Referring to the accompanying drawings which illustrate my invention and form
a part of this Specification,
Figure 1 shows a view partly in longitudinal central section of a door knob and
spindle secured together.
Figure 2 shows an elevation of the outer face or head of the knob.
Figures 3 and 4 show sectional views of alternative forms of flanged nuts as
secured to the spindle.
Referring to Figure 1 A shows the knob B the spindle C a socket nut G the door
F the rose.
In this invention I provide a square spindle having at its end a cylindrical
portion of reduced diameter. The cylindrical portion of reduced diameter is
threaded with a left hand male screw thread shown by E in drawings, and the
adjoining square portion of the spindle of full diameter is threaded at its corners
with a right hand male screw thread shown by D in drawings. When the spindle
has been passed through the door both the threaded parts are projecting more or
less according to the thickness of the door, the case shown in Figure 1 being that
of a thin door. The knob shank is internally threaded with a right hand thread
shown by A in Figure 1 to screw on to the thread D of the spindle until the knob
meets the rose. The object of reducing the diameter of the spindle at E is to
enable it to pass through the knob shank.
The head of the knob has an aperture with countersunk or beveled edges and
through this aperture I pass a socket mut C with a screw driver head having a left.
handed female thread Con drawings which I screw on to the end of the spindle
until the head of the socket nut is screwed tight home to the knob thus closing the
aperture therein. It is now impossible for the knob to work itself loose or become
shaky on the spindle by the wear and tear of constant use.
It is not necessary to make the male thread at D right handed and that at E left
handed with corresponding female threads on the knob shank and socket nut
respectively as the thread at D may be left handed and that at E right handed so
long as one is the reverse of the other to ensure that any tendency of the knob to
screw off will be checked by the refusal of the socket nut to screw in the same
direction so that the head of the socket nut always holds the knob securely.
Instead of having a screw-driver head, the head of the socket nut may be
or polygonal and be turned by a spanner and may project from the knob face
instead of having its edges flush with it, these forms being severally indicated in
the drawings, C³, C².
square
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. The combination with a knob having an internally threaded shank and an
aperture in the exterior face, of a square spindle screw threaded to receive the

page_text: shank of the knob and having its extremity of reduced diameter, with a screw
thread therein cut in the reverse direction to the thread which receives the knob
shank substantially as and for the purposes specified.
2. The combination with a knob having an internally threaded shank and an
aperture in the exterior face of a square spindle screw threaded to receive the
shank of the knob and having its extremity of reduced diameter with a screw
thread thereon cut in the reverse direction to the thread which receives the knob
shank, and a socket nut internally threaded to screw in to the extremity of the
spindle and having a flanged head to close and cover the aperture in the knob
substantially as and for the purposes specified.
3. In a square knob spindle having a cylindrical extremity of reduced diameter
the combination with a screw thread cut on the corners of the extremity of the
square portion, of a screw thread cut in the reverse direction on the cylindrical
portion of reduced diameter substantially as and for the purposes specified.
Dated this 15th day of December 1890
WILLIAM LOCKHART MORTON.
Abel & Imray,
28, Southampton Buildings, London, W.C., Agents for the Applicant.