Improvements in the Mode or Means of Attaching Door Knobs to their Spindles.
Year: 1889

page_text: Date of Application, 17th July, 1889
Complete Specification Left, 17th Apr., 1890-Accepted, 14th June, 1890
PROVISIONAL SPECIFICATION.
Improvements in the Mode or Means of Attaching Door Knobs to
their Spindles.
We ALFRED LEADBEATER and TOM LEADBEATER both of Dorrington Road Leeds in
the County of York Mechanics, do hereby declare the nature of this invention to be
as follows:-
--
The object of our Invention is to provide means for securing or fastening door
knobs to their spindles in such a manner that such fastening is not liable to become
loose and insecure, and any unnecessary play of the knobs on the spindle, or of the
spindle in the lock, especially longitudinally, is prevented.
In our Invention the end of the square spindle is grooved across on one or two or
preferably all four sides, the grooves being perhaps most conveniently V shaped, and
the angle of the vee about 55 to 60°. When the four sides are grooved, the grooves
are set, so that adjacent sides have the grooves on the one side one quarter of the
pitch of the grooves in advance or behind those on the other side, and hence also the
grooves on opposite sides are, those on the one side one half the pitch in advance or
behind those on the opposite side, which is also the case when the spindle is grooved
on opposite sides only.
The door knob may be of any ordinary suitable construction or material.
Cemented or otherwise suitably secured to the door knob is a washer, which is
divided segmentally in a line or plane coinciding with one of the sides of the spindle.
The larger segment, which only is cemented to the knob, is provided with a square
recess corresponding in size and position to the square spindle, so that when both
segments are placed in proper position, a square hole is left in the centre of the
washer, of the size of the spindle which passes through this hole. The two segments
of the washer are hinged together at one side, and held together at the opposite side
by a screw, arranged preferably so as to pass radially through a lip or tongue on the
one segment into the body of the other segment, or by means of a spring latch or
catch.
The smaller of the two segments is provided on the straight face immediately over
the spindle with a series of projecting V teeth, of such a size as to fit the ✓ recesses
or grooves in the spindle. When the grooves are cut in one side of the spindle only,
the knob can only be adjusted by the pitch of the grooves, but when the spindle is
grooved as above described on two or four sides, the knob can then be adjusted to one
half or one quarter of the pitch.
COMPLETE SPECIFICATION.
Improvements in the Mode or Means of Attaching Door Knobs to
their Spindles.
We ALFRED LEADBEATER and TOM LEADBEATER both of Dorrington Road Loeds in
the County of York Mechanics 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 our invention is to provide means for securing or fastening door
knobs to their spindles in such a manner that the fastening is not liable to become
loose and insecure, and that any unnecessary play of the knobs on the spindle, or of
the spindle in the lock. especially in a longitudinal direction is prevented.

page_text: In our invention the end of the square spindle is grooved across in any one or
more of the four sides towards the end of the spindle the grooves being most
conveniently shaped, and the angle of the vee about 55° to 60°. When all four
sides are grooved; the grooves are set or formed so that on adjacent sides the grooves
are respectively one quarter of the pitch in advance or behind one another, and hence
also the grooves on opposite sides are one half the pitch in advance or behind one
another, which is also the case when the spindle is grooved on opposite sides only."
The door knob may be of any ordinary or suitable construction or material.
Cemented or otherwise suitably secured to the door knob is a washer which is
divided segmentally in a line or plane corresponding with one of the sides of the
spindle. The larger segment which only is cemented to the knob is provided with a
square recess corresponding in size and position to the square spindle, so that when
both segments are placed in proper position a square hole is left in the centre of the
washer of the size of the spindle, which passes through this hole. The two segments
of the washer are hinged together at one side, and held together at the opposite side
by a screw arranged preferably so as to pass radially through a lip or tongue on the
one segment into the body of the other segment, or the hinged segment may be
secured in place by means of a spring latch or catch.
The smaller of the two segments is provided on the straight face immediately over
the spindle with a series of projecting vee teeth of such a size and pitch as to fit
the vee recesses or grooves in the spindle. When the grooves are cut in one side
of the spindle only the knob can only be adjusted by a distance equal to the pitch, but
when the spindle is grooved on two or four sides, the knob can be adjusted to one
half or one quarter of the pitch, and these amounts are therefore the maximuin
longitudinal play which the knob or spindle can have for the above cases
respectively.
And in order that our Invention and the manner in which the same is performed
may be more clearly and readily understood reference is given to the accompanying
drawings and to the letters and marks thereon, in which
Fig. 1 is an isometrical or perspective view of the door knob with the washer
attached, the hinged segment of the washer being shewn opened out to expose the
teeth on the same.
Fig. 2 is a plan looking on the top or flat side of the larger segment of the
washer and shewing the body of the door knob in section, or Fig.
may be considered
as a section on line A. B of Fig. 3.
Fig. 3 is an end view of the washer showing the hinged segment closed up in
place.
Figs. 4 and 5 are two adjacent side views of the spindle, in the former shewing
the teeth in profile and in the latter in full or in plan.
a is the door knob or handle, to which is cemented the segment of the washer.
c is the square hole or recess in the segment to receive the end of the square spindle d.
The spindle is shewn grooved transversely on two opposite sides with the teeth
on the one, one half pitch in advance (or behind) of the teeth on the other side.
As previously explained however the spindle may be grooved on one, two (opposite
or adjacent) or on all four sides, so as to be enabled to limit the play of the spindle
in the lock..
e is the hinged segment provided with projecting teeth f as shewn of the same
size and pitch as the teeth on the spindle. The teeth may however be formed by vee
shaped recesses in the segment, in which case the hole c is correspondingly shallower.
This arrangement however is not so convenient as the former in which the teeth
are made to project. is the hinge about which the segmente is hinged, and his
a projecting tongue on the opposite side of the segment e, which fits in a corresponding
recess in the edge of the larger segment, i is a set screw passing through the lip or
tongue and screwing into the body of the segment b.
Instead of forming the teeth on the hinged segment e as shewn, they may be
formed though not so conveniently in the bottom of the square hole c, and that part
of the boss of the segment e, bearing on the spindle may be formed flat, or recesses

page_text: or teeth may be formed both on the hinged segment and at the bottom of the
square hole c.
The neck of the door knob is provided with a ring lip or beading to cover the joint
between the boss of the washer and the neck of the door knob, or more preferably
this beading may be formed on the boss of the washer.
The washer is preferably formed of metal and the door knob may be formed of any
suitable material or in any suitable shape, and either hollow or solid.
We are well aware that spindles with transverse grooves have been previously used,
and we make no claim to such "per se," but 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 :-
The mode or method of attaching door knobs to their spindles consisting of a
washer formed in two segments, the one being cemented or otherwise secured to
the door knob or handle, and the other hinged to the former and provided the one,
or the other, or both with grooved recesses or teeth to fit corresponding teeth or
recesses on the spindle, substantially as herein set forth and illustrated.
Dated the Tath dox
Dated the lath day of
J. CLARK JEFFERSON, A.R.S.M., Wh. Sc.,
2, East Parade, Leeds, Agent for Applicants.
J. CLARK JEFFERSON, A.R.S.M., Wh. Sc.,
2, East Parade, Leeds, Agent for Applicants.