Year: 1894

page_text: Date of Application, 13th Dec., 1894
Complete Specification: Left; 13th Sept. 1895-Accepted, 2nd Nov., 1895
Pin by cies.
I, EDUARD JONCKHEER, of 71, Boulevard du Hainaut, Brussels, in the Kingdom
of Belgium, Engineer, do hereby declare the nature of this invention to be as
follows:
-:
My invention relates to, a jointed spring-frame. for bicycles whereby the rider
is practically suspended between the two wheels and vibration is reduced to a
minimum.
In bicycles as heretofore generally. constructed the frame has consisted of a rigid
structure, and as a consequence. when one of the wheels encountered an obstacle the
shock produced thereby, affected, the whole machine.
The principal object of my invention is to obviate this defect and for this purpose
I render. the wheels independent of each other.
In carrying out my invention I employ a hollow sleeve which carries the pedal-
axle a bar is jointed to, this sleeve and supports the seat by means of a cranked
tube. At the base of this bar are fitted two flat springs.
The upper end of one of the springs, is connected by a double rod to, the two
sides of the hub of the hind wheel, and the end of the, other spring is connected by
a rod to the front fork.
The frame, properly so called, consists of two bars forming a fork connecting the
axle of the hind wheel with the said sleeve. The connection of this sleeve with
the front wheel is effected by a bar also jointed to the, sleeve, and brazed or
otherwise fixed to the front, fork.
With this construction if the front wheel encounters an obstaclo, it is lifted
together with the bar which connects the sleeve with the front fork and the shock
is deadened by, the effect of the springs, the front part alone, of the machine being
affected by the shock which, is. therefore not communicated to the rider. It the
hind wheel encounters an obstacle, then the rear part acts independently of the
front part of the machine.
The sleeve which supports the pedal-axle, the saddle-support and the springs,
and which serve as a connection between the front and rear wheels has at its ends
two bosses supporting the horizontal fork serving to connect it with the axle of the
driving wheel.
In the sleeve is placed the pedal-axle running in suitable ball-bearings and
carrying the chain-wheel.
Lugs or projections on the front parts of the bosses serve to hold the pivot of
the bar connected to the front fork. The ends of this pivot are conical and the
pivot can be tightened in the lugs by means of a screw and nut.
The gentle motion obtained when travelling is such that it allows of dispensing
with pneumatic, tyres and of employing cushion, solid or even wooden tyres.
Moreover, springs, for supporting the saddle can be dispensed with, and the
machine not being subjected to vibrations the rider is not liable to lose his footing
on the pedals and his equilibrium; by my improved arrangement also friction and
the bumping of the saddle are completely obviated.
Dated this 13th day of December 1894.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.

page_text: Improvements in Bicycles.
I EDUARD JONCKHEER of 26 Rue du Chimiste, late of 71 Boulevard du
Hainaut, Brussels, Belgium, Manufacturer, 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 present invention relates to safety-bicycles and that its object is to do away
with the vibration so disagreeable to cyclists and which is, besides, so injurious to
their health. By means of my invention, I obtain a smooth, easy motion, exempt
from all vibration, while the machine remains perfectly light and loses nothing in
elegance.
In the accompanying drawings,
Fig. 1 is an elevation, one-fifth the actual size,
Fig. 2 represents the manner of fixing the frame rods and springs,
Fig. 3 is a section of the nave of the treadle-crank axle, showing the joints, or
articulation, of the frame rods, and Fig. 4 shows this articulation in detail.
.
The nave (A) of the treadle-cranks axle bears, at each extremity of its periphery,
three eyes (a, a', all) situated at distances of 90 degrees. Between the eyes (a¹)
one end of the front tube (B) is pivoted, the other end being fastened to the head
of the front-wheel fork.
Between the eyes (a") is pivoted the end of the central tube (C), which bears
the rigid saddle (E). The eyes (a) are for use, in case one of the others (a' or a¹¹)
should break.
At the point (a), there is fixed on each side of the nave, the oval section
tube (F), which meets the axle of the driving wheel.
On the lower part of the central tube (C), near its joint, two flat springs (G, G¹)
are fixed by means of a bolt and a nut. These springs are terminated by a
half-socket (g, g¹) which embraces the tube (C), on each side and encloses it as in
a ring.
The upper end of the spring (G) is articulated to the end of the rod (H), the
other end of which is articulated to the head of the fork of the front-wheel.
The upper end of the spring (G') is articulated to the fork of the rear-wheel (J)
the lower extremities of which are fixed, in the usual way, to the extremities of the
tubes (F) on the axle of the driving-wheel.
The lower end of the tubes (B, C) is provided with a cylindrical massive heel (h)
fastened at its centre, and at right angles, to the said tubes. The ends of this heel
are conical shape and engage with the eyes where they are fastened by two
headless screws, having a conical recess, conformable to the extremities of the heel
and one of which is provided with a nut to prevent it from unscrewing, or becoming
loose.
The construction, above described, prevents all shaking or vibration out of the
plane of the machine, while, at the same time giving it a rhythmical motion, within
its plane.
This rhythmical motion is due to the position of the springs (G, G¹) whilst the
lateral steadiness of the frame is due to the heel (h), held in the eyes (a', a") of
the nave.
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.-
An anti-vibratory safety bicycle distinguished by two springs (G, G¹) both
being articulated, the first to the rod (H), itself articulated to the head of the fork
of the front wheel, the second to the rear fork. which is itself fastened to the

page_text: tubes (F) on the axle of the driving-wheel, the said springs embracing the lower
part of the central tube (C) which is, as also the front tube (B) articulated by
means of heels (4) in the eyes (a', all) of the nave (A) where they are held by
screws, provided with conical recesses and safety-nuts, substantially as above
described and as represented in the accompanying drawings.
Brussels, the 11th day of September 1895.
L. DUVINAGE,
Agent for Applicant.