Improvements in and relating to Driving Gear for Cycles.
Year: 1896

page_text: Date of Application, 7th Sept., 1896
Complete Specification Left. 31st Dec.. 1896-Accepted. 13th Mar.. 1897
PROVISIONAL SPECIFICATION.
Improvements in and relating to Driving Gear for Cycles.
I, GEORGE CROYDON MARKS, of 18 Southampton Buildings, London, W.C.,
Consulting Engineer, (a communication from Jean Richez of 42 Boulevard
Bonne Nouvelle Paris, in the Republic of France, Engineer), do hereby declare
the nature of this invention to be as follows:-
My invention relates to improvements in and appertaining to driving gear for
cycles and has for its object to insure the easy and uniform running of the machine
and protection of the gearing from the deposit of dust and mud thereon.
In carrying my invention into effect as applied to a safety bicycle I provide a
shaft within one of the lower tubular horizontal members of the frame and I
provide at each end of such shaft suitable bevel pinions respectively for receiving
motion from a bevel driving gear secured upon the driving axle and for
communicating the rotary motion transmitted from the driving axle to the rear
wheel of the machine.
At each end of the lower horizontal member of the frame containing the shaft
I provide a ball race as a bearing upon which the bevel pinions may work, such
pinions having upon their back surfaces corresponding races and suitable means
provided for the adjustment of the bevel pinions upon the shaft and the pinions
upon the bearing.
At each end of the member of the frame containing the communicating shaft
I provide a case or cover of such configuration as to enclose the respective bevel
wheels for the purpose of preventing the deposit of dust and mud upon the gear
wheels, but I provide a suitable opening or recess so that the respective bevel
pinions may gear with the driving and driven wheels and I preferably employ
these casings as a part of the frame and in contiguity respectively with the axle
bearing and the rear wheel bearing. Upon each of the casings I preferably
provide a covering for enclosing a driving wheel and driven wheels either integral
or independent but secured to the casing.
Dated this 7th day of September 1896.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
Improvements in and relating to Driving Gear for Cycles.
1, GEORGE CROYDON MARKS, of 18 Southampton Buildings, London, W.C.,
Consulting Engineer, (a communication from Jean Richez of 42 Boulevard
Bonne Nouvelle, Paris, in the Republic of France, 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 relates to improvements in and appertaining to driving gear for

page_text: cycles and has for its object to insure the easy and uniform running of the machine
and protection of the gearing from the deposit of dust and mud thereon.
My invention is illustrated in the accompanying drawings in which,
Figure 1 is a sectional elevation through one of the lower tubular horizontal
members of the frame of a safety bicycle; while
Figure 2 is a part sectional plan corresponding thereto.
In carrying my invention into effect as applied to a safety bicycle I provide a
tubular shaft S within one of the lower tubular horizontal members of the frame T
and I provide at each end of such shaft suitable bevel pinions BC respectively for
receiving notion from a bevel driving wheel A secured upon the driving axle and
for communicating the rotary motion transmitted from the driving axle S through
the bevel pinion D to the rear wheel of the machine.
At each end of the lower horizontal member of the frame T containing the
shaft S, I provide a ball cup H in which balls are provided upon which the bevel
pinions B and C may work, such pinions having upon their back surfaces corre-
sponding races and suitable means provided for the adjustment of the bevel pinions
upon the shaft and the pinions upon the bearings.
At each end of the tube T containing the communicating shaft S, 1 provide or
secure a case or cover R and R' of such configuration as to enclose the respective
bevel wheels B and C for the purpose of preventing the deposit of dust and mud
thereon, but provide a suitable opening or recess so that the respective_bevel
pinions B and C may gear with the driving and driven wheels A and D and
I employ these cases or covers R R as a part of the frame and in contiguity
respectively with the axle bearing bracket and the rear wheel bearing bracket as
clearly shown in the drawings. Upon each of the cases or covers I preferably
provide a covering G and G for enclosing the driving wheel A and driven wheel Ď
either integral or independent as illustrated but secured to the casing.
It will be understood that the object of the invention is to provide the tube T
which encloses the communicating spindle S, with terminal cases or covers which
serve as a gear case and allow of inserting the pinions into positions.
The tube which encloses the driving spindle, may be made in one or more pieces
connected together by screwing or brazing and composed of steel iron or any other
suitable metal.
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-
1. An arrangement of bevel transmission gear for cycles consisting of cases or
covers which receive and protect the gear wheels and are connected to the enclosing
tube of the frame substantially as described.
2. An arrangement of bevel transmission gear for cycles substantially as
herein before described and illustrated in the accompanying drawings.
Deted this 21st day of December 1896
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.