Year: 1886

page_text: I, LEWIS WALL of 5 Spencer Road Hornsey Road Holloway in the County of
Middlesex Clerk of Works to the School Board of 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 :-
My Invention relates to a simple and efficient means of securing the knob to the
spindle of a door-lock, the knob being easily affixed in such a way that it cannot
possibly work loose and the length of the spindle being readily adapted to suit
doors of different thicknesses having either a mortise or a rim lock.
The Invention consists in a combination of parts whereby the knob is caused to
turn the spindle independently of the parts which secure it thereto, so that there is
no tendency of the last mentioned parts to wear and shake loose. I am aware that
knobs have heretofore been secured to spindles in such a way that the knob turns
the spindle directly and independently of the means by which it is attached
thereto, but in such cases the knob has generally been secured to the spindle by a
nut or female screw attached to the knob, screwing upon a thread cut upon the
angles of the square spindle which is objectionable, as the angular portions of
thread are apt. to act like those of a screw tap and to strip the thread of the nut or
female screw causing the parts to easily become disconnected especially when, as is
not infrequently done, the spindle has to be filed down to enable it to be passed
through the hole in the follower of the lock. I avoid this objection by using a
spindle which is of plain square form at that part upon which the knob acts in
turning it and I, at same time, avoid the objections to those kinds of knobs used
with plain spindles in the case only of mortise locks and which are retained in
position by screwing the rose of the knob to the door and which are liable to pull
off especially if the door be a comparatively thin one.
My Invention has for its object to provide a more effectual means of connecting
the knob to the spindle free from the objections to all other existing devices for
the same purpose.
Reference is to be had to the accompanying drawings forming part of this
Specification wherein figure 1 is a longitudinal section, and figure 2 a cross-section

page_text: on line 1-1 figure 1, of the handle figure 3 is a part section, part elevation, of a
portion of the handle separately, figure 4 shows a modification. The same letters
of reference indicate the same parts in all the figures.
The Invention consists essentially in the combination with a plain square or
angular spindle a of a bushing b fitting and sliding upon the plain part of the
spindle and retained thereon by a screw nut or its equivalent said bush having a
cylindrical neck and a square head and of a bandle consisting of a knob portion c
fitting upon the square head of the bush and a neck portion d turning on the
round neck of the bush and connected to the knob by a screw or other joint. By
this construction it will be seen that the strain of turning the knob is applied
directly through the square bush to the spindle without any tendency to loosen
the screw or other fastening which secures the bush to the spindle or the joint
which unites the two parts of the knob together. The spindle has preferably a
screw threaded end portion a¹ of round section upon which screws a round nut e
for the purpose of retaining the bush on the spindle and adjusting it to suit the
thickness of the door etc. This nut is preferably connected to the bush b into the
square head of which the nut is partially countersunk so as to avoid a loose part
which might be lost, and to afford a longer bearing for the bush on the spindle
when it is partly on the square and partly on the round screwed portion, as in the
case of a thick door. The connection between the nut and bush may be made by
means of a pin or set screw f passing through the side of the bush and received in
circumferential groove g in the nut or by screw threading the nut externally and
the socket in the end of the bush with a thread of the same or a different pitch to
that of the screw a' on the spindle so that the two screw threads will act as a lock
nut and cause the nut to jam itself when the bush is tight up against the door.
Instead, however, of a screw threaded portion a¹ and a nut e the latter might be a
mere collar on the square spindle secured by a lateral set-screw received in one of
a row of holes in the face of the spindle there being no strain on the collar which
would cause such set-screw to work loose. The bush b has a cylindrical neck upon
which turns the neck portion of the knob d the latter being confined between the
enlarged square head 6¹ of the bush and the inner end b which is burred over as
shown. The hollow knob c has a square socket c¹ corresponding to and fitting
upon the enlarged head b¹ this part of the knob being cylindrical externally and
received in a corresponding cylindrical socket d¹ of the neck portion of the handle,
the two parts c and d of the handle being securely connected together either by an
external thread cut upon the part c' screwing into a corresponding thread in the
socket as shown, or by a bayonet joint formed by a pin or pins h on the one
received in right-angled slots i in the other as in figure 4 the parts c¹ d¹ not being
screw-threaded, or by a set screw inserted through a hole tapped in the side of the
socket d¹. The connection whichever may be its form would have no tendency to
loosen since no strain comes on it in the act of turning the handle. To form a
neat union of the parts c and d the edge of the socket-portion d is preferably
received in a counter-sunk groove in the knob c as shown. In affixing the knob
constructed as illustrated in figures 1. 2. and 3 the bushing b with the neck d and
the nut e is first slipped on the spindle and brought close up to the rose, if one be
used, by screwing up the nut e. The knob c is then slipped on the head of the
bush and connected to part d by screwing back the latter. One knob only need
be fixed to the spindle in this way the knob at the other end being permanently
attached thereto.
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
I claim is;
1. The combination of parts constituting the herein described means of attaching
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page_text: 2. A means of connecting a knob to a spindle consisting essentially in the
combination with a plain angular spindle of a bushing fitting and sliding thereon
and retained by any suitable means, said bush having a cylindrical neck portion
and an enlarged square head and of a knob-handle made in two parts the one
turning on the bush and the other fitting on its square head the two parts being
connected by any suitable means substantially as and for the purpose specified.