Improvements in Gear-cases for Cycles.
Year: 1895

page_text: Date of Application, 19th Oct, 1895-Accepted, 28th Dec., 1895
COMPLETE SPECIFICATION.
Improvements in Gear-cases for Cycles.
I, WILLIAM JOSEPH GODDARD of 136 Great Saffron IIill, in the County
of London, Secretary to a Public Company, 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 :-
This invention relates to gen cases for cycles and will be best understood by
reference to the accompanying drawings in which
Figures 1 and 2 ate perspective views showing respectively the inner and outer
sides of one form of gear-case constructed according to this invention.
Figure 3 is a longitudinal vertical section of the same geat-case and
Figme 4 is a perspective view of the removable cap thereof.
Figues 5 and 6 aie views of blanks from which the gear case shown in Figures 1
and 2 may be made.
Figure 7 shows the end portion of a modified form of one of these blanks.
Figures 8 and 9 are views of blanks from which a modified form of gear case may
be constructed
Figure 10 is a perspective view of another construction of the gear-case of the
lower portion of which Figmc 11 is a perspective view.
Take letters indicate like parts throughout the drawings.
A gear case such as shown in Figures 1, 2 and 3 I construct of two principal
parts A and B each formed of a single piece of sheet metal or material shaped as
shown respectively in Figures 5 and 6
The plate A from which the upper part of the case is constructed, when adapted
to have its sinulle end completed by a cap C Figures 1 to 4, is cut off at the zigzag
dotted line A', the cap being formed of a blank of generally the shape of the
smaller piece A 2, though a little longer to allow for overlapping.
The full lines D in Figmes 5 and 6 indicate the parts at which the blanks are
bent to form the three sides of more correctly the two sides and edge of each of the
separable parts of the gear-case.
The dotted lines E in Figure 6 indicate the paits at which the blank B is bent
to form channels E' for receiving the edges A 3 of the case-part A when the
parts A and B are fitted together in the manner shown in Figures 1 to 3.
The dotted lines F in Figures 5 and 6 indicate the parts at which the blanks A
and B are bent to form channels of guides F1 Figures 1, 2 and 4 for receiving the
valious sliding doors or lids
The channels E and guides F¹ are formed by bending the blank A or B on one
of the lines E or F in one duection and then in the reverse direction on the line
adjacent to it as clearly indicated in the perspective view Figure 4.
The central strip G of each blank, that is to say the portion between the two
lincs D, is extended beyond the part at which it 18 connected with the side walls of
the case to form a tongue G which is provided with lateral extensions or lugs G 2
adapted to be received in channels formed as next described on the side walls of the
geai-case. These channels nie constructed by bending the ends of the blank in
one direction, on the dotted line II, and again, after the edges G2 are in these
channels, at the full lines so as to fold the united edges & 2 II flat upou the
outside of the tongue Gas shown in Figures 1 and 2. Where it is not convenient
to form the joint as last described, as for example farther in the angle formed
LD

page_text: between the tongue G¹ and the adjacent parts of A or B a tight joint may be made
by soldering with or without an angle strip I or in any other convenient manner.
For the sake of lightness I prefer to made these gear-cases of aluminium,
although I may use other material, and in those parts of the curved joints at or
near the oil-bath and through which mil might escape o dut enter, the joints ought
to be soldered, but as this has to be done by a special aluminium solder which is
very expensive, I prefer to adopt the following method. On each of the two edges
to be connected together 1 secure by folding (in a manner generally similar to that
previously described in connection with the folded joint II Figures 1 & 2) a stup
of copper and solder these together with ordmary solder, I may however instead
of copper, use any other suitable metal capable of being soldered with ordinary
Bolder.
If desued the lateral extensions G 2 may be formed into separate_lugs as in
Figure 7 and the Joints between these and the adjacent parts of A or B made by
rivets passing through holes J on by solder or other suitable means
The two tongues G are curved according to the shape of the end of the gear-cRSC
as shown in Figures 1, 2 and 3, and at one end of the gcar-case are connected
together by a hinge K those at the other end being connected together by a bolt or
screw and nut L as shown in Figures 2 and 3 o1 in some other manner which will
admit of A and B being readily released from each other.
The gear-case is provided with the usual openings for the crank and back wheel
axles and the cham stay and with lids o covers M adjustable in the before
described guides F for as much as possible, closing these openings to exclude
dust and dit
If desired the gear-case may be formed without a detachable cap C under which
construction the part A would be formed from a blank such as represented by the
full-line outline shown in Figure 5
The blanks represented in Figures 8 and 9 are such as ate employed when no
adjustable lids or covers are required the edges of the parts A and B being fitted
together by channelled joints E such as previously described at all parts except
the ends of tongues G and those at which the axles or chain stay of the ecycle
have to pass through the walls of the gear-case In this example also as u
Figme the tongues G¹ are provided with divided lugs G 2 which may be soldered
or otherwise suitably jointed to the side walls of the gear-case In Figure 9
certain portions of the edges are shown broken away and folded to form the
channels E while the other parts are shown in then flat or non-folded condition.
-
lu Figures 10 and 11 I have shown a geal-case of somewhat different construction
from those previously described Here the two main separable portions A and B
and when such is provided the cap Cate each formed of thi ce distinct parts viz
two independent side walls N and a central strip G, these, throughout then length,
as shown in the diawings or at any desired intervals along their length being
connected together by folded joints as shown in Figure 10
In Figures 10 and 11 the better to illustrate the invention I have at some parts
shown the joints as only partially folded and at others completely folded. The
meeting edges of the soparable portions of this gear-casc are connected together
by a channelled joint E' such as previously described and this remark applies also
to the meeting edges of the cap C with the other two main separable parts of the
geat-case in all the examples previously cited.
By the term "main separable parts" employed in the clans I mean parts such
as A Baud C and not lids or covers or other minor fittings fiequently employed
in connection with gear cases.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim 18:-
1. Forming one of the main separable portions of a cycle-gear case out of a
single nieceiof metal -

page_text: 2. A blank for one of the main separable portions of a cycle-gear case formed
in one piece substantially as described and illustrated in Figures 5, 6, 8 or 9 of the
accompanying drawings."
3. Forming the main separable parts of a cycle-gear case each of one piece
of metal.
4. Forming the main separable parts of a cycle-gear case each of one piece of
metal bent and jointed in substantially the manner described.
5. Forming a channel or guide such as E or F' on a portion of a cycle-gear
case by folding over the metal of which that portion is composed so as to
enable it to receive the edge of another portion to be fitted to it substantially as
described
6 Permanently connecting two meeting edges of different portions of a cycle-
gear case by forming on one edge a channel for receiving the other channelled
edge and then doubling both edges down upon the surface of one of the portions
substantially as described.
7. The combination and arrangement of parts constituting a complete cycle-gear
case constructed substantially as described with reference to Figui es 1, 2, 3, 4, 5,
and 6 of the accompanying drawings.
8. The combination and arrangement of parts constituting a complete cycle-gear
case constructed substantially as described with reference to Figures 10 and 11 of
the accompanying diawings.
9. In an aluminium cycle-gear case forming a joint by connecting by means of
a folded joint with the aluminium edges which have to be joined pieces of copper
tin or other suitable material and then soldering these together with ordinary
solder whereby the use of aluminium solder is avoided.
WM. J. GODDARD.
Boult & Wade,
Agents for the Applicant.
WM. J. GODDARD.
Boult & Wade,
Agents for the Applicant.