Improved Spring Frame Bicyole.
Year: 1898

page_text: Date of Application, 25th Nov., 1898
Complete Specification Left, 24th Aug., 1899--Accepted, 23rd Dec., 1899
Improved Spring Frame Bicyole.
JOHN COCHRAN, Cycle Manufacturer, Scotch Street, Armagh, CHARLES WATKIN,
Cycle Engineer, George's Street, Armagh, do hereby declare the nature of this
invention to be as follows:-
The above is a spring frame bicycle having double front forks hinged together,
about one third from the crown having spiral spring and pneumatic arrangement
and supported by steering tube so designed to break concussion with back and
forward motion. The back forks are hinged to the bottom bracket by means of
cones or balls. The back fork stays are connected together by means of a fork
crown working in telescopic arrangement by spring and pneumatic action.
A is an ordinary front fork of a bicycle or tricycle cut about one third of its
ordinary length with holes at bottom ends.
•
B is another fork full length with a projection placed the same as A and there
jointed by means of screws ball race or cone shape.
Cis a spring case supported with a swivel so arranged to fit into steering
tube with screw cap at the end and springs inside each end of the piston like
a steam engine so to produce a back and forward action. The two crowns are
connected by a rod between A & B with spring case C held in its position.
E is the back fork.
D is a tube so constructed that at the upper part is jointed to the seat pillar
with clip nut and bolt. The bottom part is threaded inside or out to receive a
milled edge disc also screwed so to prevent E from coming out. E has a flange
brazed on or screwed and a ring also screwed which makes fast a leather disc so
to work as an air pump. A spiral spring is placed in the inside the full length
between D and E. The upper part of the spring is inserted a piece of wood or
any other suitabl material about half the length of the spring to keep the spring
straight. Leather is also put round the spring to prevent noise when working.
Bottom part of the fork with crown is connected with hinged joints at the
back fork ends.
Dated this Twantre-fourth day of November 1898
Improved Spring Frame Bicycle.
JOHN COCHRAN, Plumber and Cycle Maker, 60, Scotch Street, Armagh, CHARLES
WATKIN, Cycle Engineer, 4. George's Street. Armagh, 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
reference being made to the drawings accompanying our Provisional Specifi-
cation:
-
hont
All its andinom Lanoth
second fork

page_text: with a projection about one third its length is joined together by bolt and nut
or ball bearings. A spring case is placed between the two front forks which
works on a swivel supported by the steering tube. A rod works inside spring
case carrying a spiral spring which connects the two crowns so as to give a back
and forward action. The back forks with crown and spring case which works
in a telescopic arrangement with spiral spring inserted. The top part of hack fork
with crown
a leather disc is made to screw on so to work like an air pump to
prevent sudden concussion with the spring.
The drawings on Sheet 1 illustrate the invention to the front part of bicycle.
A is the front fork, cut at about one third of the usual length, and having the
lower end made flat for connection with B.
B is a second fork with a strap connection brazed on, and the connection
between A and B is completed with bolt and nut.
The spring case C is made of steel tube, with hole in one end to receive the
end of piston rod, and a screw cap on the other end. A piston rod with disc is
fixed inside the case C, and also a spring as shown, said spring bearing against
the cap and disc.
At the end of the case C which the piston rod goes through, two pivots are
fixed so as to work on a swivel this swivel is joined to the steering tube, or, it
can be fixed the reverse way by connecting it to B and joining the end of the
rod to A, in which latter case the outer end of C would be at the back of fork A.
The drawings on Sheet 2, illustrate the invention to back part of bicycle. D) is
a steel tube, the top of which is connected to the seat pillar, for this connection
a lap joint or a solid casting is made with two holes in same, and the connection
is completed by bolt and nut.
The bottom of 1) is tapped and a disc screwed on, to keep E in position. Eis
a steel tube connected to crown of fork, and the top end works in telescopic action
in D.
A rod is inserted in D with a disc at upper end, which disc fits tightly inside
the top part of D, this keeps the rod and top part of spring in centre of D, this
rod is half the length of spring, a spiral spring encircles the rod, this spring
extends the whole length of D and E. The bottom part of spring goes into E,
and a leather shield placed round the lower part of spring to prevent friction
between spring and inside of E. At the top of E a flange is formed to fit the
tube D, and the end is tapped for this purpose, a ring is made to screw on,
and a leather washer is fixed, so that the ring tightens up the washer against
flange, this acts like an air pump and prevents concussion of spring.
Having now particularily 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: -
1. That the second fork B, the spring case C, the piston rod, the spring, and
the connections between B and C, as shown by the drawings on Sheet 1, and
described in the Complete Specification, are all novelties in construction on the
front part of bicycle.
2. That the tube 1) connected to seat pillar, the tube E working in D, the
rod and spring in D and E, and the discs, shield and washer, in connection with D
and E, as shown by the drawings on Sheet 2, and fully described in the Complete
Specification, are all novelties in construction on the back part of bicycle.
Dated this 20th day of December 1899.
JOHN COCHRAN.
CHARLES WATKIN.