Improvements in Cases or Chain Guards for Velocipedes.
Year: 1893

page_text: Date of Application, 18th Aug., 1893
Complete Specification Left, 30th Apr., 1894-Accepted, 2nd June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Cases or Chain Guards for Velocipedes.
We THOMAS SMITH, of No. 8 Harnall Terrace, Coventry, and FREDRICK
CHARLES BUCKLEY of 25 Brook Street, Coventry, both in the County of
Warwick, Mechanics do hereby declare the nature of this invention to be as
follows:-
Our invention relates to an improved guard for enclosing the driving chain of
a cycle, the object of our invention being to provide a dust proof guard which can
be easily and firmly attached to the frame of the cycle and which is so constructed
that the chain can be readily exposed for the purpose of examination or alteration
when so required.
We construct our improved guard preferably of sheet metal. The main part is
of a size and shape suitable for enclosing the chain and driving hub on all sides
and is of sufficient length to reach from the rear end of the driving hub in a safety
bicycle to nearly as far as the crank spindle.
A slot is made along the centre on both sides of the guard longitudinally and
this slot extends from the centre of the driving wheel hub to the end of the guard
so that the guard can be slid along the sides of the chain wheel on the hub without
removing the wheel from the cycle. The front end of the guard is made in one
piece and its edges fit into corresponding recessos in the main part of the guard, to
which it is then fixed by small screws or other suitable means.
The slots in the sides of the guard are closed up by sliding pieces two of which
are grooved so that they fit upon the lower stay tube of the frame and thus fix the
guard in its proper position.
A part of the outside of the main guard about 10 inches in length is cut away
almost to the full width of the guard and the aperture is closed up by a cover
vertically sliding across the guard. The removal of this cover enables a person
to get at the chain and arrange the small slides by which the guard is attached to
the stay tube. When the guard is once attached, only the large cover need be
removed to examine the chain.
We may also make the smaller slides on the inside of the guard to move
vertically instead of longitudinally and may attach the guard to the frame by
means of stays in addition to the slides so arranging them that they do not interfere
with the easy removal of the large sliding cover.
We adapt the guard to a tricycle by altering the position of the slides in such a
way that the object of our invention is attained and the advantages of the large
vertically sliding cover is retained.
Dated this 18th day of August 1893

page_text: Improvements in Cases or Chain Guards for Velocipedes.
We, THOMAS SMITH of No. 8 Harnall Terrace, Coventry, and FREDRICK
CHARLES BUCKLEY of 25 Brook Street, Coventry, both in the County of
Warwick, Mechanics, 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 :-
Our invention relates to an improved guard for enclosing the driving chain of a
cycle, the object of our invention being to provide an improved dust-proof guard
which can be easily and firmly attached to the frame of the cycle and which is so
constructed that the chain can be readily exposed for the purpose of examination
or alteration when so required.
In order that our said invention may be readily understood we will describe
same with reference to the accompanying drawings, on which
Figure 1 is an elevation of the front side of a chain or gear case constructed
according to our said invention and showing the several parts composing the said
case separated.
Figure 2 shows the back elevation of the same case shown at Figure 1, the parts
thereof being similarly separated.
Figure 3 is a horizontal section taken on the line X Y of Figure 1 and
showing the parts and slides put together and fitted upon the bottom stay tube of
a cycle.
Figure 4 is a transverse section taken on the line X' Y' of Figure 1 drawn to a
larger scale than the latter figure and showing the parts placed together, and
Figure 5 is a similar section taken on the line X2 Y2 of Figure 1.
Similar letters of reference indicate like parts in the several figures.
According to our invention we construct the main part A of the improved guard
or gear case of a size and shape suitable for enclosing the driving chain and rear
wheel sprocket on all sides and of sufficient length to reach from the rear sprocket
in a safety or rear driven bicycle to nearly as far as the crank spindle.
Slots B (Fig. 1) and B¹ (Fig. 2) are made along the centre on both sides of the
guard A longitudinally and these slots B B' extend from the centre of the driving
wheel hub to the end of the guard so that the guard A can be slidden along the
sides of the rear chain wheel without removing the wheel from the cycle. The
end C of the guard is made in one piece and its edges C C¹ fit into corresponding
recesses such as are shown at D, Figure 1, in the main part A of the guard, to
which it is then fixed by screws D' or other suitable fastenings; the front end C
is shown in position adjusted to the part A at Fig. 3.
The slots B B in the sides of the main part A of the guard are closed by
sliding pieces; two of these sliding pieces E F when the parts are in position as at
Fig. 3 are located in guides El Fupon opposite sides of the part A and serve to
close a portion of the slots B B therein in addition to which the said slides are
formed with outwardly projecting flutes or grooves E2 F2 which take partially
around or upon the lower stay tube G of the machine as shown at Figure 3. The
slide E for the front side of the gear case is shown detached at Figure 1, while
that slide F for the back is shown detached at Figure 2. When in position
(Figure 3) the slides fix the guard or gear case in its proper position.
The outside of the main part A of the guard say for about ten inches in length
is cut away as shown at Figure 1 almost to the full width of the guard, and the
aperture is closed by a cover H, Figs. 1 and 4, vertically sliding in guides H¹ on
the parts A and C across the guard to close the opening. The removal of this
cover H as at Fig. 1 enables the chain to be readily inspected and manipulated if
necessary, and also the slides EF by which the guard is attached to the stay

page_text: tube can be arranged by means of this opening. J, Figs. 2, 3 and 5 is a slide to
complete the closing of the back part of the slot B', Fig. 2. When the guard is
once attached, only the large cover H need be removed to examine the chain.
In some cases we may attach the guard to the frame by means of stays in
addition to the slides so arranging them that they do not interfere with the easy
removal of the large sliding cover. The ordinary adjustment slides may be
employed to close and fit up to the rear axle and the crank axle.
We adapt the guard to a tricycle by altering the position of the slides in such
a way that the object of our invention is attained and the advantages of the large
vertically sliding cover is retained.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
1. In cases or chain guards for velocipedes, the sliding pieces E F located on
opposite sides of the guard and formed with projecting Hutes or grooves E² F¹
to take onto the lower stay tube of the machine substantially. as and for the
purposes set forth.
2. In cases or chain guards for velocipedes, the cover H, sliding in guides on
the front of the said case or guard, to cover an aperture thereiu by which the
chain may be inspected or manipulated when the cover is slidden away substantially
as and for the purposes set forth.
3. In cases or chain guards for velocipedes, the fluted or grooved slides E F in
combination with the cover H substantially as set forth.
4. In cases or chain guards for velocipedes, the combination with the main
part (A) slotted on both sides (B B¹) and an attachable end part (C) therefor,
the sliding pieces (E F) formed with projecting flutes or grooves (E³ F³) to
take onto the lower stay tube of the machine, and the cover H sliding in guides
on the front of the case or guard all substantially as and for the purposes
herein before described and illustrated with reference to the accompanying
drawings.
5. The general construction and arrangement of parts composing our improved
case or chain guard for velocipedes, all combined and acting substantially as and
for the purposes hereinbefore described and illustrated with reference to accom-
panying drawings.
Dated this 50th day of A Dri 1894.
Dated this 50th day of April 1894.
BREWER & SON,
London and Leeds, Agents for Applicants.