Improvements in Detachable Gear Cases for Cycles
Year: 1895

page_text: Date of Application, 7th May, 1895
Complete Specification Left, 10th Dec, 1895-Accepted, 15th Feb, 1896
PROVISIONAL SPECIFICATION
Improvements in Detachable Gear Cases for Cycles
We ROBERT FREDERICK HALI, Managing Director of the Cycle Components
Manufacturing Company Limited, of "Ferndale," Church Road, Moseley, near
the City of Birmingham, and JOHN THOMAS MUSGROVE, of the Cycle
Component Companys Works, Alma Street, Birmingham afore aid, Tin-plate
Worker, do hereby declare the nature of this invention to be as follows
This invention relates to detachable and oil-containing gear cases for cycles,
and has for one of its objects, a simple means of attachedly connecting the gear
case to the stay on the chain wheel side of the bick fork, for another object,
the making of the case perfectly oil tight, and for further object, so arranging
the basis or foundation framing that the case, when fitted thereto, is perfectly igid
and noiseless
The gear case is made in two longitudinal cross sections with the meeting edges
formed with grooved and tongued joint, which are adapted to unite the casing
sections together and the casing to a base framing or foundation strip inited by a
stepped Junction, and with the webs disposed in dissimilar plancs, in order to
correct the inclination of the stay and to ad nit of the chain passing from the
diving to the diven chain wheel, the latter of which comes outwards of the stay
and the former inwards of it
of which
In carrying out our improvements, the foundation firming, by mean
the gear case is carried and by which it is connected to the stay, is made of two
troughed o chanuelled and webbed longitudinal sections, together running
throughout the whole length of the stay, and whose meeting ends have Junction
pieces, over and under stepped respectively united together by cro-s directed
attachable sciews
છે.
That section coming nearest the bottom bracket has its webs duected in
set back plane, whilst the convex of the trough is duected outermost and runs
na plane nearly lignable with the brought-forward webs of the section coming
nearest to the back wheel, the convex of the latter ection, which is presented
innermost, running nearly in a line with the webs of the former section hence the
changing of the planes of the webs by a cranked junction to admit of the obliquity
of the stay
The inner end of the inner section callies a shallow hat-shaped boss coming in
front of the outside bore of the bottom bracket, and with the flange of the boss
coming in line with the flange of the foundation frame, which is connected to the
stay through the medium of a band or other clip
The outward end of the outer section comes underneath the slotted chain adjust-
ment end of the fork member, and the upper part is considerably set back in order
to clear the adjacent back stay of the cycle framing
Thus the base or foundation framing or compound stup has at its opposite sides,
nearly continuous tongue webs, upon which coi responding grooves in the gear case
(as hereinafter described) take and fit, oil tight
The gear case consists of two longitudinal and cross directed halves, each having
coincident clearances or gaps upon one side, into which the bracket end part of
the boxed or troughed foundation framing takes, whilst the other side of the case,
at the back wheel end, is also gapped, into which the other part of the boxed or
troughed foundation plate also takes

page_text: The longitudinal meeting edges of the sections are respectively tongued and
giooved, whilst the oppo ed edges of the gapped parts are giooved only, and the
back walls of the grooves are formed with curved lips so as to make leads for
guiding the opposed tongues into the said grooves
The circular opening in the back of the bracket end of the case is grooved, and
has guide lips for taking upon the flanged rim o cucular web of the boss coming
in front of the bracket, whilst the grooves of the gap running into the said circulai
hole take over the web of the first named foundation framing, and the groove
bounding the gips upon the other side of the case takes over the web of the second
section of the found ition
The hole wherethrough the crank axle passes is dished or domed inwardly,
whilst the re open end of the case, opposite to the chain adjustment, 13 covered
in by traversing segmental slides working in grooves and pu hed home or withdrawn
by studs guided in suitable slots
One section of the case is provided with a sight-hole or glazed opening, where-
through the quantity of lubricant within the case can be sighted
Dated this with day of Mov 1905
ROBERI FREDERICK HALL,
JOHN THOMAS MUSGROVE,
By Henry Skerrett,
Agent for Applicants
We, ROBERT REDERICA HALL, Managing Diec or of the Cycle Components
Manufacturing Company Limited, of "Fundale,' Church Road, Moseley, neal
the City of Bumingham, and JOHN THOMAS MUSGROVE of the Cycle
Componets Companys Works, Alma Street, Birmingham foresaid, Tin-plate
Worker, do hereby declare the nature of this invention and in what mannci the
same is to performed, to be particularly described and asce ained in and by the
following statement
I his invention relates to det tchable and oil-containing gear cises for cycles, and
has for one of its objects, a simple means of attachedly connecting the geat case to
the stay on the chain wheel idi of the back folks, to another object, the making
of the case perfectly oil tight, and for a further object, so ananging the basis
or foundation fiaming that the case, when fitted thereto, is perfectly rigid and
noiseless
The gear case is made in two longitudinal cross sections, with the meeting edges
formed with grooved and tongued joints which we adapted to unite the casing
se tions together and the casing to a bisc fiming or foundation strip with the
cbs disposed in dissimilar planes, in order to correct the inclination of the stay
and to admit of the chain passing from the driving to the driven chain wheel, the
latter of which comes outwards of the stay and the former inwards of it
In carrying out our improvements, the foundation framing, by means of which
the gear case is earned and by which it is connected to the stay, is made of two
troughed or channelled and webbed longitudinal sections, together running
throughout the whole length of the stay, and whose meeting ends have junction
pieces, over and under stepped respectively, united together by cross duected
attachable screws
That section coming near(st the bottom bracket has its web, directed in a set-
bick plane, whilst the convex of the trough is directed outermost and runs in a
plane nearly lignable with the brought-forward webs of the section coming nearest
to the back wheel, the convex of the latter section, which is presented innermost,

page_text: running nearly in a line with the webs of the former section, hence the changing
of the planes of the webs by cranked Junction to admit of the obliquity of
the stay
The inner end of the inner section carries a shallow hat-shaped boss coming
in front of the bottom bracket end, and with its flange coming in line with the
flange of the foundation frame, which is connected to the stay through the medium
of a band or other clip
The outward end of the outer ection comes underneath the slotted chain
adjustment end of the fork member, and the upper part is considerably set back in
order to clear the adjacent bach stay of the cycle framing
Thus the ha e or foundation fiaming or compound strip has at its opposite sides,
nearly continuous tongue webs, upon which corresponding grooves in the gear case
(as hereinafter described) take and fit, oil tight
The gear cae consists of two longitudinal and cross directed halves, each having
coincident clear inces or gaps upon one side, into which the biachet end part of the
boxed or troughed foundation framing takes whilst the other side of the case, at
the back wheel end, is also gapped, into which the other part of the boxed oi
troughed foundation plate also takes
The longitudinal meeting edges of the sections are respectively tongued and
grooved, whilst the opposed edges of the gapped parts are grooved only, and the
back walls of the grooves are formed with curved lips so as to make leads for
guiding the opposed tougues into the said grooves
I he circul u opening in the back of the bracket end of the case is grooved, and
has guide hips for taking upon the flanged rim or circular web of the boss coming
in front of the bracket, whilst the grooves of the gap running into the sud cucular
hole take over the web of the fist named foundation framing, and the groove
bounding the gaps upon the other side of the case takes over the webs of the second
section of the foundation
The hole wherethrough the cranh axle passes is dished or domed inwardly
whilst the ear open end of the case opposite to the chain adjustment, is covered
in by traversing segmental slides, working in grooves and pushed home or withdrawn
by tuds guided in suitable slots
One ection of the case is provided with a sight-hole or glazed opening, where-
through the quantity of lubricant within the case can be sighted
Fure 1 of the accompanying drawings represents a front elevation of a fitted
detachable and segmental chain-gear cise constructed, arranged and provided with
improvements made according to my invention
Figure 2 represents a back elevation of the sime
Figure 3 represents the principal component parts of the said gear case separated,
showing the organization of the found ition strip, which is itself made sectional, with
the sections united at the middle
Figure 4 represents an edge view of the bottom part of the case, with the
foundation strip in elevation
Fure 5 represents a vertical cross section of the case upon the dotted line
Figure 1
gure 6 is a vertical cross section of Figure 1 upon the dotted line ¹
1igure 7 cpie ent. a like cross section as iguie 6, but with the halves of the
This case or costi, which
ca separated and removea from the foundation strip
forms in oil bath for the chain and chain wheel to run within, is separated from the
found ition strip ecured to the chain wheel side member of the back forks
Figure 8 represents a cross section of the case upon the dotted line 'Figure 1,
showing how the supporting stay of the case comes exteriorly of the casing, in te id
of interiorly as heretofore
Iigure 9 represents a section upon the dotted line a³ Figure 1, whil t Figure 10
is a cross section of Figure 1 upon the dotted line x Figure 1, which view is like
unto Figure 8, but shows the stay running out through the left hand side of
the case

page_text: casing
Figure 11 is an enlarged sectional view of a grooved edging part of the
Figure 12 is a topside plan of the foundation stup in position upon the carrying
stay and Figure 13 is a longitudinal section of the same
Figure 14 represents the component parts of the foundation stup separated from
each other and from the stay
Figure 15 is a section of the real portion of the strip upon the dotted line 2
Figure 14 and Figure 16 is a like section of the forward part of the stup upon
the dotted line Figure 14, showing the set back toughed character of the
strip
The same letters of reference indicate corresponding parts in the several figures
of the drawings
The gear case is made of two fitted-together horizontal sections or halves a, a¹,
with the opposed or meeting edges a³, of the forward part of the front of one
section, which are tongued, taking into the presented grooved edges a³ of the
forward front part of the other section, and with the like tongued edges a*, of
the after part of the back of one section engaging with the opposed grooved edge a³
of the after part of the back of the other section the inner paits a, of the grooves
at both back and front extending higher than the front edges of the said grooves,
which are each made from a single strip of metal folded upon itself, as best seen in
Figue 11
The front sides of the after part of the sections of the said two-part case have
clearances a¹ which, when the sections are brought together, form a longitudinal
gap a', extending throughout about one half of the entire length of the case, with
the top and bottom edges a, a, being grooved into which the opposite tongue
flanges 11, of the after part 62, of a found ition stup b, whose fore part is marked b³,
take, so is to make an oil-tight joint between the said parts
The back sides of the front parts of the said sections also have like clearances a¹¹,
which form a longitudinal gap a", extending through a large part of the middle of
the said front of the casing and having the top and bottom edges a, a, grooved
to take upon the tongue flanges 6, of the said fore pait 63, of the foundation strip b
The bottom-bracket chain wheel end of the foundation strip has a hat-shaped
boss b³, with the circular flange 66, onto which the grooves as, a¹, of corresponding
semi cicular gaps a¹7, formed in each half of the sections, take, whilst the extreme
fiont ends of both sides and also the bach side of the front end the sud sections me
furnished with groove and tenon joints als als
The foundation stip b, is built up of longitudinal halves 2, 3, each having
tioughed or set-back channels 7 68, presented in opposite directions and running in
the same axial lines, and with their opposed ends fitted with stepped junctions 6, 10,
interlocking with one another and each being semi-circularly and coincidently gapped
they form a complete circular opening ", wherethrough the oblique stay c¹, on the
chain wheel side of the bacl foils c, passes when lying within the channels but
outside the casing
The sections of the junction piece of the foundation strip are united together by
small screws whilst the middles of the sections of the casing are secured to the
foundation stip, through the medium of the said Junction, by small screws d,
passing through the sides of the casing and into the soliu met il of the junction
The case at its bottom bracket end is further secured to the stay by an adjustal le
band clip e, attached to the back of the forward half of the foundation strip, and
drawn around the stay c', by a sciew pin el The fore part of the stay terminates
in a bottom bracket 3, having front and seat-1 od framing members e, e directed
from it, and carrying a pedal axle e, carving a chain wheel e' for driving a chun
communicating motion to the chain ear wheel g, secured on the hub g' of the back
wheel The back of the case, adjacent to the said bub, is fitted with sectional
and adjustable slides ', h³, working within grooves a 20, a¹¹, of the halves of
the case
are cha n adjustment fork ends of the stays c', and y are the back stays

page_text: Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is
First In chain gear cases for cycles, the combination with sectional halves of
the case, of a two part foundation strip, with the sections in versely troughed and
disposed in the same axial line and with then opposed ends united together by
semi-circularly gapped junction ends, substantially as and for the purpose described
and set forth
Secondly In chain-gear cases for cycles, the combination with sectional halves
of the case, united together by groove and tongue joints, of a two-part foundation
stup, whose sections are inversely troughed and disposed in the same axial line and
have their opposed ends united together by semi circularly gapped and stepped
junction pieces secured to one another, and the sections of the case to them, by
screws or equivalents, substantially as described and set forth
Thirdly In chun-gear cases for cycles, the combination with the bottom-bracket
outer end of sectional foundation strip, of an annular tongue-flanged boss, substan-
tially as and for the purpose described and set forth
I
Fourthly In chain-gear cases for cycles, the combination with the longitudinal-
split sections whose fiont and back sides are gapped at the rear and after parts
iespectively and with the edges of the gaps formed into grooves of a sectional
foundation stup, whose edges are formed into tongue flanges for taking into the
said grooved edges of the gaps, substantially as and for the purpose described and
set forth
Fifthly In chain-geat cases foi cycles, the combination with the sections of the
case, supported by and secured to a sectional and inversely troughed foundation
strip adapted to take upon an oblique stay of the framing, or grooved edges, made
from a folded strip, and with the inner walls of the same extending above the
edges of the outer walls, substantially as and for the purpose described and set
forth
Sixthly The improvements in detachable and oil containing gear cases,
substantially as and for the purpose described and set forth
Dated this 9th day of December 1895
ROBERT FREDERICK HALL,
JOHN THOMAS MUSGROVE,
By Henry Skerrett,
24 Lemple Row, Birmingham, Agent for Applicants