Year: 1888

page_text: Date of Application, 28th Feb., 1888
Complete Left, 26th May, 1888
Complete Accepted, 29th June, 1888
I, WILLIAM JOHNSON, of Bridge Road, East Moulsey, in the County of Surrey,
Watch Maker, do hereby declare the nature of this invention to be as follows :-
My Invention relates to means of more effectually securing door knobs to their
spindles so that they shall not be liable to wear loose and come off, as now happens
with knobs secured by set screws, or by screwing on the spindle itself.
The Invention consists in fitting the knob to the spindle by a longitudinal dovetail
connection which will ensure a permanently tight fit of the spindle in the socket of
the handle and prevent play of the handle in any direction.
The face of the handle which abuts against the rose being thus kept constantly
perpendicular to the spindle, affords a good bearing against the rose and prevents the
spindle rocking in the eye of the follower.
The dovetailed connection is formed by planing or otherwise forming a groove of
dove tailed section along one face of the spindle and providing in the spindle socket
of the handle, a corresponding dovetailed tenon which, when the handle is applied to
the spindle, fits into the groove and being slightly tapered becomes tightly wedged
therein so that even although the socket may be large for the spindle, the knob will
be firmly secured without shake.
The knob may be retained on the spindle by a set screw or cross pin taking into
one of a series of holes in the spindle.
The relative positions of the dovetailed tenon and groove may however be reversed,
that is to say, the tenon may be on the spindle and the groove in the spindle socket
of the knob.
In either case, the same groove or tenon may be utilized to effect a similar dove-
tailed connection between the follower of the lock and the same spindle if desired.
D: 60th day of tinha 1000
W. JOHNSON.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.

page_text: COMPLETE SPECIFICATION.
Improved Means of Securing Door Handles and Latch Followers
to Spindles.
I, WILLIAM JOHNSON, of Bridge Road, East Moulsey, in the County of Surrey,
Watch Maker, 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 :-
My Invention relates to means of securing door knobs to their spindles, so that
they shall not wear loose and come off, as now happens to knobs secured by set
screws, or by screwing on the spindle itself.
The Invention consists in fitting the knob to the spindle by a longitudinal dovetail
connection which will ensure a permanently tight fit of the spindle in the socket of
the handle and prevent play of the handle in any direction. The face of the handle
which abuts against the rose being thus kept constantly perpendicular to the spindle,
affords a good bearing against the rose and prevents the spindle rocking in the eye of
the follower.
The Invention also comprises the application of the same mode of connecting the
latch follower to the spindle.
Reference is to be had to the accompanying drawings forming part of this
specification, wherein figure 1 is a part section, in the plane of the spindle, and
figure 2 is a cross section, (on a larger scale) of the knob handle and spindle, on
lino 1-1 figure 1. The same letters of reference indicate the same parts in both
figures.
b
A is the spindle socket of the knob handle, B is the lock spindle, and C the latch
follower. The dove tailed connection between the socket A and spindle B is formed
by planing or otherwise forming a groove 6 of dovetailed section along one face of
the spindle, and providing in the spindle socket A of the handle, a corresponding
dovetailed tenon a which, when the handle is applied to the spindle, fits into the
groove b. The knob is fixed to the socket A in the ordinary manner and the whole
may be retained on the spindle by an ordinary set screw, or by a cross pin d taking
into one of a series of holes in the spindle, and this cross pin may have a threaded
part d' screwing into a tapped hole in the side of the socket A. The relative positions
of the dovetailed tenon à and groove b may however be reversed, that is to say, the
tenon may be on the spindle, and the groove in the spindle socket of the knob.
A similar dovetailed connection is made between the latch follower Cand the same
spindle B, the same groove (or tenon) in the spindle fitting a corresponding tenon c
(or groove) made in the eye of the follower, as shown.
In applying this grooved spindle to an old latch follower, the tenon is a loose key
of dovetail section to fit the groove and slightly wedge shaped in thickness, which is
driven tightly into the eye of the follower, to prevent shake.

page_text: Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
1 claim is :-
1. The herein described means of securing a knob handle to its spindle, consisting
of a dovetailed tenon in the socket of the handle fitting in a longitudinal dovetailed
groove in the spindle (or vice versa) in combination with a cross pin, set screw, or
other means of preventing longitudinal motion of the knob on the spindle.
2. The herein described means of connecting the latch follower to the spindle,
consisting of a dovetailed tenon on the one fitting in a corresponding groove in the
other, as specified.