Improvements in Securing Door Knobs to Spindles.
Year: 1892

page_text: Date of Application, 11th Aug., 1892
Complete Specification Left. 11th May, 1893—Accepted, 17th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Securing Door Knobs to Spindles.
I HIPPOLYTE RONGIER of 2 Salford Terrace, Gravelly Hill, Birmingham,
Engineer do hereby declare the nature of this invention to be as follows:-
My improvements in door knobs and spindles have particularly for their object
to provide means whereby the knob may be secured to the spindle in a simple and
effective manner such that it will not be liable to work loose.
The improvement consists in making the spindle or that part of it which enters
the socket in the knob of two parallel members corrugated both on their outer and
inner faces, the corrugations on the outer faces acting as rack teeth to engage with
the socket in the knobs when forced slightly apart by a taper key pin driven
between the two members and fitting tightly in the corrugations formed on their
inner faces. The socket in the knob handle is adapted to interlock with at least
two of the rack teeth of each member of the spindle, the tapered key being situated
preferably at a point midway between said points of engagement so that the out-
ward pressure by which it forces the two members of the spindle apart is equally
divided between the two points of engagement and the firm double grip thereby
obtained prevents all liability of the knob working loose. The key pin is inserted
diametrically through holes in the neck of the knob and it may be concealed by an
outer sleeve enclosing this part of the knob.
The knob is made in two parts united by a circunferential lap joint, the rear
part being formed in one with the neck by stamping up from a disc and the base or
end thereof being closed except for a central square hole to give passage to the
spindle, two opposite edges of the hole forming one of the points of engagement
with the rack teeth of the spindle. The other point of engagement is formed by a
thimble shaped liner also stamped up from a disc and having a similar square hole
in its end. This liner is placed within the neck of the knob with its open end
towards the base of the neck and is secured in place by contracting the neck behind
it, after which the knob is completed by uniting the front and back portions as
above mentioned.
In the case of a porcelain or other solid knob, a socket similarly constructed to
obtain a double grip of the spindle by the insertion of a tapered key pin, would be
let into the neck of the knob.
Dated this 11th day
A 1000
H. RONGIER,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Securing Door Knobs to Spindles.
1, HIPPOLYTE RONGIER of 2, Salford Terrace, Gravelly Hill, Birmingham,
Engineer, 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 has for its object to provide means whereby the knob may be
secured to the spindle in a simple and effective manner such that it will not be liable
Alla

page_text: Reference is to be had to the accompanying drawings, forming part of this
Specification, in which
Figures 1 and 2 are longitudinal views of the spindle in face and edge views,
with the knobs attached thereto, in section.
Figure 3 is a cross-section, on line 1-1 Figure 1.
Figure 4 is a view of the liner to form the socket in the flat.
Figure 5 is a face view of the disc which with the liner completes the socket.
The same letters of reference denote like parts in all the figures.
The improvement consists in making the spindle (or that part of it which enters
the socket in the knob) of two parallel members A A serrated or formed with
transverse corrugations preferably both on their outer and inner faces, the
serrations a on the outer faces acting as rack teeth to bear against and engage with
the sockets in the knobs B B' when the two members AA are forced slightly apart
by taper key pins C driven between them and fitting in the serrations a¹ on the
inner faces. The socket D in each knob handle is adapted to afford at least two
points for each member A A of the spindle to bear against, the tapered key C
being situated preferably at a point midway between the said two points, so that
the outward pressure by which the two members of the spindle are forced apart is
equally divided between the two points and the firm double grip obtained by the
engagement at these points of the serrations on the outer faces of the members A
prevents all liability of the knob working loose. The socket D is formed preferably
of a cupped liner & stamped up from a blank of the form shewn in Figure 4 and
having a central square hole to give passage to the spindle and four radial
portions which when the blank is cupped form the cylindrical portion of the
liner, each radial portion terminating in a slight extension d between which fit the
flats on the edge of a disc which completes the socket whereby the disc is
prevented from turning. This disc d³ also has a central square hole for the passage
of the spindle and the points of engagement of the socket with the spindle above
referred to, are formed by the edges of the holes in the disc d' and the cupped
portion respectively. The socket is enclosed within the base 6 of the knob,
preferably with the disc against the closed end of the base in which is a square
hole coinciding with the hole in the disc d' through which the spindle passes, the
socket being secured in place by contracting the neck behind it, after which the
knob is completed by uniting the front and back portions, that is to say the knob is
made in the usual way by spinning or stamping up two discs and uniting the two
portions by a circumferential joint 63. This mode of forming the knob constitutes
no part of my invention, but the formation of the neck and the joint * should be
performed after the insertion of the socket.
The connection of the spindle with the one knob may be permanent, in which
case the two members of the spindle A may be fixed in the socket by the insertion
of the key pin C whose ends being flush with the sides of the liner d are wholly
concealed within the base b of the knob. In the case of the other knob B', which
is necessarily adjustable, the pin C is inserted through holes in the knob coinciding
with the holes d in the liner, the latter mode of fixing being applicable to both
knobs if preferred.
In the case of a porcelain or other solid knob, a socket, similarly constructed to
obtain a double grip of the spindle by the insertion of a tapered key-pin, would be
let into the neck of the knob.
The above described mode of forming the socket is the one preferred, but it will
be obvious that the invention is not limited thereto, as the socket might be cast or
otherwise made with serrations in the sides of the hole adapted to engage with the
serrations of the spindle.
It will be obvious that the inner faces of the members A might be plain, the
pin being sufficiently held in place by the holes in the liner, or, conversely, the
outer faces might be plain the inner faces being serrated, the pin in that case taking
the end thrust.
The two members A A of the spindle are preferably made of iron or steel, by

page_text: rolling or stamping in dies, and to strengthen them against torsion they might be
rivetted together with a distance piece between, at the middle portion a' which
passes through the lock.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is-
The herein described means of connecting door knobs and spindles, which con-
sists in a spindle made of two parallel serrated or rack toothed members in com-
bination with a wedge driven between them and with a socket in the knob adapted
to receive the members of the spindle and to engage therewith by the outward
pressure thereof, substantially as specified.
Dafad this 11th 1
1002
H. RONGIER,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.