Improvements in, and relating to, Brakes for Velocipedes and other Road Vehicles".
Year: 1899

page_text: Reprinted as amended in accordance with the decision of the Supervising
Examiner acting for the Comptroller-General; dated the 8th day of July 1998.
[The Amendments are shown in exised & italic tunel
Date of Application, 18th Aug., 1899
L
1000
you
0
PROVISIONAL SPECIFICATION.
Improvements in, and relating to, Brakes for Velocipedes and other
Road Vehicles".
We, JOHN DRING, of 57 Chancery Lane, W.C., Engineer, and THOMAS LEIGH
MITCHELMORE, of 233 High Road, Willesden Green, N.W., Mechanical Engineer, do
hereby declare the nature of this invention to be as follows:-
Our invention relates to horseshoe-shaped rim brakes and it has for its objects to
provide improved attachment mechanism whereby such a brake is adapted to be
applied to the wheel of a velocipede or like vehicle; to modify the braking
mechanism so that adjustment of the shoes or frictional parts for wear or diversity
of sizes of the parts is simplified; and generally to effect the improvements herein-
after indicated.
The horse-shoe forming part of the braking mechanism is preferably formed in
two parts one of which overlaps the other at the point of juncture, the two parts being
held together by transverse screws or other equivalent means.
According to our invention we attach to the steering-post, crown or other con-
venient place (in the case of a double-crowned machine at a point between the two
crowns) a band-clamp that carries on a projection from it a suitable guiding-socket
or block. When brake-operating mechanism such as that described in the Specifi-
cation of Letters Patent No. 25,325 of 1895 or 14402 of 1897 is employed this
socket may be screw-threaded internally and serve for the reception of-the incom-
pressible member of the flexible connection between the brake-lever and the horse-
shoe; it may also serve for adjusting the length of the said flexible connection. The
inextensible member of the above arrangement, or other connector from the brake-
lever is, as will be understood, connected to the horse-shoe. In other cases the
socket serves as a guiding eye for the lever connection. Suitably located on each
prong of the fork, or upon the back stays of the velocipede, is a band-clamp and
pivotally connected between each clamp and the corresponding extremity of the
horse-shoe is a link which, while permitting the rise and fall of the horse-shoe as the
brake is operated or released, prevents the shoe from being carried round with the
wheel as the velocipede travels.
The horse-shoe carries at each extremity a leather, fibre, rubber or like faced
friction shoe and it is advantageous that the said friction shoes should be loosely
jointed to the horse-shoe so that the former may readily assume and retain a true
bearing on the wheel rim. This, according to our invention, we accomplish in an
improved manner and at the same time allow for the adjustment of the friction shoes"
for varying sizes and shapes of wheel rims and for adjustment for wear. For this
purpose the two extremities of the horse-shoe are each formed with a laterally-ex-

page_text: tending internally screw-threaded boss and upon the friction shoe is a laterally-exten-
tending screw-threaded stem. The screw-threaded stems of the friction shoes are
screwed into the herein before mentioned bosses and retained in the desired position
by lock-nuta if necessary, or alternatively the said stems and bosses might be plain
and the stems held in position by clamping screws. It will be obvious that when
the brake is fixed in position the wheel-rim will itself prevent the complete rotation
of the friction shoes but they will be so loosely held in position as to readily assume
their true position relatively to the said wheel rim.
In some cases it is desirable to prevent the lateral movement of the horse-shoe as
a whole. This we accomplish by fastening on to the extremity of the stem of each
friction shoe, or on to the horse-shoe, a finger which engages with the outside or in-
side, as may be suitable, of the fork-prongs or stays of the machine.
It will be obvious that many of the improvements herein before described are
adaptable to horse-shoe rim brakes applied to the back or driving wheel of a machine.
Dated this 18th day of August 1899.
A. F. SPOONER,
323 High Holborn, London,
Agent for the Applicants.
"Improvements in, and relating to, Brakes for Velocipedes and other
Road Vehicles".
We, JOHN DRING, of 57 Chancery Lane, W.C. Engineer, and THOMAS LEIGH
MITCHELMORE, of 233 High Road, Willesden Green, N.W., Mechanical 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:-
Our invention relates to horseshoe-shaped rim brakes and it has for its objects to
provide-improved-attachment-mechanism-wher-by--such--a--brake--is-adapted-to-be
applied-to-be--wheel--of--a--ve oeire-de--or--like--vehiele; to modify the braking
mechanism so that adjustment of the shoes or frictional parts for wear or diversity
of sizes of the parts is simplified ; and generally to effect the improvements
hereinafter indicated.
,
In the accompanying drawings, which are illustrative of our invention,
Figure 1 is a front view,
Figure 2 is a side elevation,
Figure 3 is a partial underside view, and
Figure 4 is a detached sectional view showing the construction of parts and the
application of the brake to the front or steering wheel of a velocipede.
Figures 5 and 6 are respectively an underside view and section of one of the
friction shoes.
Figures 7 and 8, and 9 and 10 show in front elevation and underside view
respectively two modified forms of guide bracket with our adjusting means in
position, and
Figures 11 and 12 are side and face views respectively showing the application
of the brake to the back stays of a velocipede.
According-to-our-invention-we We attach to the steering-post, crown, chain stays
or other convenient place (in the case of a double-crowned machine it may be at a
point between the two crowns a and b) a guide-bracket c consisting of arms d, a
boss e and screwed stems f. These screwed stems of pass between the crowns a
and b one on each side of the steering post g. Clamping plates h are placed
over the stems f, and nuts i serve to secure the whole bracket in position,

page_text: When-brake-operating-mechanism-sueh-as-that For the purpose of adapting the
guide bracket for use in connection with the "New and Improved Mechanism for
the Transmission of Power" described in the Specification of Letters Patent
No. 25,325 of 1896 or and brake-operating mechanism su h as that le cribel in the
Specification of Letters Patent No. 14402 of 1897 is-employed; the boss or socket e
may-be is, according to, our invention, screw-threaded internally to receive an
adjustable bush j the upper end of which is provided with a hexagon or other head
and is bored, as at 7, for a suitable distance therefrom to receive the end of the
incompressible guide member m of the brake-operating mechanism for the trans-
mission of power while the remainder of such bush is bored, as at n, to a smaller
diameter to allow the passage through it of the inextensible member o, which (in
the case of Figures 1 to 4 after passing through the spiral spring p) is connected
with the horse-shoe q.
The horse-shoe q may be formed of two parts which overlap each other at the
point of connection with the inextensible member o and be there united by screws s
or equivalent means, as shown in Figures 11 and 12, or the said horse-shoe may be
in one piece, as shown in Figures 1 to 4, and have attached to it, by the screws s or
otherwise, a plate t formed to accommodate a nipple u through which the
inextensible member o is passed and therein soldered.
Friction shoes are carried at the extremities of the horse-shoe and it is advan-
tageous that the said friction shoes should be loosely jointed to the horse-shoe so
that the former may readily assume and retain a true bearing on the wheel-rim.
This, according to our invention, we accomplish in an improved manner and at the
same time allow for the adjustment of such friction shoes for varying sizes and
shapes of wheel rims and for adjustment for wear. For this purpose the extremities
of the horse-shoe are each formed with a laterally-extending internally screw-
threaded boss v which may be split as shown and provided with lugs w and a
clamping screw x. Into the said bosses the friction-shoes having laterally-extending
screw-threaded stems y are screwed, and retained in the desired position by lock-
nuts, if necessary. These friction shoes (see Figures 5 and consist of a trough-
like piece of metal into which are inserted brake blocks 1.
The stems y are
preferably rivetted to the pieces. When the horse-shoe is designed to rest against
the back stays 2 of a velocipede (see Figures 11 and 12) the friction-shoes are each
provided with an ear 3 pierced as shown at 4 into which one end of a tension
spring 5 catches, whilst the opposite end of each spring is attached to a band
clamp 6 secured by a clamping screw 7.
A similar band clamp 6 with clamping screw 7 and nuts 8 are located on each
prong 9 of the fork (or on each of the chain stays) see Figures 1 to 4. Pivotally
connected between each clamping screw 7 and stem y of the friction shoe is a
link 10 which, while permitting the to and fro movement of the horse-shoe as the
brake is operated or released, prevents the shoe from being carried round with the
wheel as the velocipede travels.
In some cases, when designed to rest against the back stays (Figures 11 and 12),
it is desirable to prevent the lateral movement or displacement of the horse-shoe as
a whole.
This we-neeomplish is effected by fastening on to the extremity of the
stem y of each friction shoe, or on to the horse-shoe itself, a finger 11 which engages
with the outside or inside, as may be suitable, of the stays 2 of the machine.
It will be understood that the adjustment of the bush j enables the internal
shoulder to be brought close up to the end of the incompressible member m against
which it is in a position to re-act when the inextensible member o is put in tension
by the operation of the brake lever or other equivalent part. The rotation of the
said bush j also serves to adjust the length of the inextensible member o and
consequently the position of the horse-shoe.
In the brake attached to the front forks or chain stays, when the said inextensible
member o is put in tension the horse-shoe q is raised against the opposition of the
spring p and the horse-shoe is guided by the links 10 until the blocks 1 bear upon
the rim 12 of the wheel,

page_text: When the brake is designed to rest against the back stays (see Figures 11 and 12)
the tension springs 5 extend from the horse-shoe (or the friction shoes) to the band
clamps 6 and serve to return the brake after operation to its normal position. In
the case of Figures 1 to 4 the spring p working in compression serves the same
purpose.
The guide brackets c shown in Figures 7 to 10 are so modified as to facilitate
their application to box crown machines and are for this purpose provided with a
single screw-threaded stem f which passes through a hole 13 bored through the
box 14 and steering post where it is secured by a nut i. When the box crown is
of the form shown in Figures 7 and 8, the concavity of the plate 15 is sufficient to
prevent the bracket from swinging out of the vertical position, but when the crown
is of the form shown in Figures 9 and 10 the said plate is prevented from turning
by means of the flange 16 which engages the underside of the crown.
Having now particularly 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:
In--a--brake--mechanism;--the-guide--bracket-adapted-to-be--attached--to--the
erown-or-equivalent-part-of-a-velocipede-substantially-as-set-forth-
2.
In-a-brake-mechanism, the-combination-with-the-guide-bracket,-of-a-clamping
eh--the--said--bracket-to-the--crown-or-equivalent-part-of-a
velosipede,-substantially-as-set-forth.
device--serving--te--att
1. 3. In a brake mechanism, the combination, with the guide bracket C and a
clamping device serving to attach the said bracket to the crown or equivalent part
of a velocipede, of an adjustable bush j substantially as and for the purposes set
forth.
4. In-a-brake--mechanism;--the--combination,--with--a--horse--shoe,
adjustable-trietion-shoes-substantially-as-set-forth.
f--laterally
-In-a-brake-mechanism,--the--combination--with--a-horse--shoes--of--laterally
adjustable-and-loosely-mounted-friction-shoes-substantially-as-set-forth:
2. In a brake mechanism, the combination of a horse-shoe having internally
screw-threaded lateral bosses at its extremities and friction shoes having externally
screw-threaded stems projecting through the bosses and capable of turning therein,
80 that a true bearing on the wheel rim may be assumed and retained, and also of
movement laterally jor adjusting the distance apart of the said shoes, and means
serving to retain the said shoes at that distance apart when so adjusted. adjustably
and-loosely-mounted-in-the-said-bosses-substantially-as-set-forth.
In--brake-mechanism;-the-combination of band-elamps-adjustably-connected
to-the-fork-prongs-or-stays-of-a-velocipede; a-horse-shoe--carrying-brake-blocks--and
pivotally mounted-links- onnecting the horse shoe-with-the-band-elamps-substantially
us set-forth.
8. In-a-brake-mechanism;-the-combination-of-band-clamps-adjustably connected
to the fork-prongs-or-stays-of-a-velocipe le; a-horse-shoe-having-lateral-bosses-at-its
extremities;-frietion-shoes-adjustably-and-loosely mounted-in-the--said--bosses--and
pivotally-mounted-links-connecting-the-horse-shoe-with-the-band-clamps-sub tantially
as-set-torih.
9. In-a-brake-mechanism;-the-combination,-with-a-hors-shoe-and-friction--shoes
attached-thereto; of-one-or-more-projecting-fingers-adapted-to-bear--upon--the--stays
as-set-forth.
of-a-velocipede-and-se-prevent-lateral-displacement-of-the-horse--shoe--substantially
10. Brake--mechanism--constructed,--arranged,--and--operating--substantially-as
described-with-reference-to-the-accompanying-drawings:
Dated 11 Jan of M1000
A. F. SPOONER,
323 High Holborn, London,
Agent for the Applicants.