Year: 1898

page_text: I, JACOB HENDRIK MANTEL, of 126, Weesperzijde, Amsterdam, Holland,
Mechanic, 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 certain improvements on the driving gear for cycles
described in the Specification of my application for Letters Patent filed the 29th
July 1897 under No. 17822.
.
The improvements principally relate to the construction,―
1) Of the socket at the end of the back fork for receiving the driving shaft
with the bevel gear, so as to form a completely closed casing."
2) Uf the back wheel axle which is now formed as a pin carried in a sleeve
which latter is provided with the cones which bear on the balls of the bearings;
3) Of the driving shaft which includes the means for supporting same.
In the accompanying drawing,
Fig. 1 is a horizontal section of the arrangement as applied to a cycle.
Fig. 2 is a side elevation of same.
Fig. 3 is a cross section through the back wheel, hub.
Fig. 3 is a section of the sleeve before referred to.
Fig. 3 an elevation of the spindle before referred to.
Fig. 4 an elevation partly in section of one of the covers of the bracket carrying
the driving cranks.
The modified arrangement of the back wheel was found to be desirable for
the purpose of more readily enabling the back wheel to be removed when
desired.
$
According to the present construction, the separate dust-cap heretofore em-
ployed is dispensed with, as the driving shaft D is together with the bevel gear
focated in a completely closed casing or socket provided with a projecting ledge
which fits into a groove t of the cup or bell-shaped enlargement G, of the hub F
surrounding the gear S¹, so that the casing tightly encloses the whole driving
gear and keeps same dust proof.
877

page_text: This casing or socket cousists of a flat disc PI provided with the ledge l, and
the socket portion P which receives the driving shaft D and ball bearing Z said
part P being provided with a bulged portion P2 for the bevel wheel S. The
part P has a single small opening o, through which the bevel wheel S gears with
the bevel wheel S. The stay c which encloses shaft D is brazed with the part P,
and the fork of the back wheel. is supported by this part and is integral with
the disc P (see Figs. 2 and 3).
The back wheel spindle E is located within the sleeve e, upon which the
cones e¹ are mounted, one of which is screwed to the sleeve e and is adjustable by
a counter nut e; said sleeve is situated in the hub F and is retained therein
when the wheel is removed from the frame.
The spindle E is provided with screw threads E' for screwing into a hole p
of the disc P¹, and its other end has screw threads provided upon an enlarged
part E2, on which the step L is screwed. The spindle terminates in a square E³.
In order to insert the back wheel, it is placed between the fork and the
latter is bent outwards until the ledge has entered the groove t of the. cup G.
Subsequently the spindle E is inserted, that is to say, it is first passed through
an opening in the part H in the end of the stay on that side, then through
the sleeve e and is thereupon screwed with its screw threaded part E into the
hole P until the enlarged part E2 bears against the end of sleeve.
The spindle then firmly connects the wheel axle with the disc P¹ of the socket
or part P, that is to say with the one side of the back-wheel fork. Thereupon
the step L is screwed on to the spindle until it firmly presses the other side of
the frame against the counter-nut 2 of the cone e¹, that is to say, against the
sleeve e, so that the wheel axle is also firmly connected with the frame on this
side. The opening in the portion H of the frame is not screw threaded.
When the back wheel is to be taken out, the step L is first unscrewed from
the enlarged part 2 of the spindle E and the latter by means of its square E³,
is removed from the disc P.
The spindle can then be withdrawn from the sleeve e and, on subsequently
opening the fork so that the ledge is disengaged from the groove t of the cup G
the toothed wheel S₁ will be removed out of gear with the toothed wheel S, and
the wheel and sleeve e will drop out of the frame.
I also arrange the ball bearings for the driving shaft D differently.
In the present case they are situated behind the bevel wheel S in the socket
portion of the casing P and sideways of the crank shaft in the loose cover B of
the crank shaft casing. The driving shaft D has at each end a cone s and s¹
respectively which presents a small friction surface to the balls in the ball
bearing cups Z and Z respectively.
By this construction the arrangement of the crank shaft casing is materially 4
simplified, so that the stay tubes can be easily attached. The ball bearing cup Z
is screw threaded and fits into the cylindrical portion of the casing P, and is
adjusted by a counter nut z and thus closes up this said portion.
In this arrangement both ball bearings of the driving axle-instead of being
situated inside of the bevel wheels SR are now located outside of same, which 4
provides a preferable arrangement.
As will be seen from the figures, the dust cap K for the bevel wheel R¹
which latter gears with the large bevel wheel R upon the crank shaft C, is now
attached sideways of the crank shaft, to the loose cover B of the crank shaft.
casing and to the frame.
5
In conclusion it may be mentioned, that instead of the arrangement shewn in
the drawing in Fig. 1, the crank axle the driving shaft and the back wheel axle
can be placed at right angles to each other so that simple bevel gears of an
angle of 45° can be used. It will be seen that in Fig. 1 the gears at the crank
shaft end and the back wheel are made on different angles, but by arranging 5
shaft D at right angles this can be obviated.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. In driving gear for cycles the arrangement of casing for the back wheel
driving mechanism secured to the frame tubes and having a socket for receiving
one of the horizontal back stays of the frame with end bearings such as Za
disc portion into which the back wheel spindle is screwed and a bulged portion
for receiving one of the bevel gears the disc portion being provided with an
opening through which the gear may engage with the gear on the back wheel
which is situated in a bell shaped part or cup G having a groove t in which
engages a ledge on the disc portion substantially as described.
2. In driving gear for cycles the arrangement of the back wheel axle con-
sisting of a spindle having an enlarged part E2 which abuts against and is
enclosed in a sleeve e carrying cones forming part of the bearings of the back
wheel hub said spindle passing through the sleeve at both ends and being
secured at one end in a disc P of a casing enclosing one of the back wheel gears
and at the other end being held in one of the back stays so that it presses the
sleeve e against the disc P substantially as and for the purpose described.
3. In driving gear for cycles the combination of a driving shaft having coned
ends ss level gears SR₁ and end ball bearings ZZ the latter (2) being carried
in a removeable cover B of the crank bracket, of the casing consisting of the
socket P and disc P substantially as described.
4. The arrangement of the dust proof casing for the driving wheel of the back
gear substantially as described and illustrated in the drawings.
5. The construction of back wheel axle whereby on removing a step or cap L
and withdrawing a spindle E having an enlarged end Es from disc 1 the back
wheel with its bearings may be removed from the fork and dust proof casing
of the driving wheel of the back gear substantially as described and illustrated
in the drawings.
6. The improved gearing for driving cycles substantially as described and
illustrated in the drawings.
7
171 1
1000
PHILIP M. JUSTICE,
Chartered Patent Agent, London, for the Applicant.