Year: 1888

page_text: Date of Application, 3rd Dec., 1888
Specification Accepted, 8th Jan., 1889

page_text: which is semi-cylindrical in form, having sides or feet E E; a lever G is cast in one
piece with the block or rivetted upon it. H, fig. 4 is a bent sheet iron plate terminating
at each end in fingers L L and L L which are coupled together by small plates M Mr.
In the central part of this plate H there is a half cylinder O rivetted on the plate or
cast in one piece with it. P P1, fig. 5, are two curved sheet iron bands, joined at their
ends by plates N N¹ rivetted upon them, such plates being hollow in the middle in
order to leave a way or passage between them and the bands P P₁; upon these plates
there are cramps QQ R, fig. 6 is a draught band also of sheet iron, its width
being equal to the width between the bands P P¹. This band R is provided at each
end with ears S S¹; T T¹ are stops.
To fit my brake together, I proceed as follows: I place the block C to ride upon
the half cylinder 0 of the band H, see figs. 7 and 10; I then introduce the
fingers L Land L L of the band H in the ways N N' and rivet the plates M M¹
o their ends. The band H cannot then be separated from the friction bands P P.
I afterwards place the draught band Rin the space left between the two bands P P₁
and I pass one of its ends between the fingers L' L' and the other between the
fingers LL of the band H, fig. 4, in such manner that the pin D of the block C
may be placed in the ears S S¹ as seen in figs. 7 and 10. The stops T T' are
intended to strike against the plates M M¹ and stop the draught band R.
My brake being then completed, I place it in the opening B of the retaining
plate A, fig. 8 in such manner that the cramps QQ shall catch in the ends of the
opening B. I afterwards mount the wheel upon the axle, and the hub fits exactly
in the circle formed by the various parts of my brake, as will be seen in fig. 9.
This hub is of wood; and at the part where the friction is applied wooden pins are
driven vertically into it; this increases its resisting power considerably whilst
diminishing the wear, for the friction takes place directly upon the wooden pins.
Such is the general arrangement of my brake system, of which I shall now proceed
to explain the working; for this purpose, and in order to make my explanation
more clearly understood, I have only shown in fig. 10 the working parts of the
brake, and they are drawn to a larger scale.
The arrow 1 shows the direction in which the wheel turns; when the driver wishes
to stop, he pulls the lever a in the direction shown by arrow 2 upon which the lever
assumes the position shewn in dotted lines. By this movement the rope b is drawn
tight, the corde slackened, and the lever G brought to the position represented in
dotted lines, and as such lever is formed in one piece with the block C, the latter
turns round the side or foot E, and by this movement tightens the draught band R.
The stop T then strikes against the plate M¹ which draws with it the band H. and
consequently the opposite plate M which then strikes against the edge of the plate N ;
by, such such means the latter is drawn round as are also the two bands P P rivetted
upon it.
All the parts of my brake tend therefore to turn round the hub of the wheel, but
the cramp Q which catches in the opening B of the retaining plate A, which is fixed
firmly, stops such movement and causes the brake to bind. It will in fact be under-
stood that the more power is applied to the lever G the more violently will the
brake bind, such binding pressure only ceasing with the stoppage of the wheel or the
release of the lever. This binding pressure is moreover almost instantaneous. The
stoppage in the contrary direction, viz.: when the vehicle is moving backwards, is
effected by working the lever in the opposite direction, when results exactly similar to
those above described will be obtained, but reversely.
My brake may moreover be constructed in various other ways to suit different cases,
and the block C may be placed above or underneath the hub as may be most desirable to
meet the requirements of the different classes of vehicle to which it is to be applied.
It may be worked by the driver by means of a treadle, lever or other suitable
medium, I may even contrive a kind of catch by which it may be made self-acting
on the fall of a horse or any sudden stoppage. I can likewise isolate each separate
part of my brake system by any suitable incombustible material, or to deaden the
noise, I can apply leather or other suitable material wherever desirable..

page_text: Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, 1 doclare that what I claim is:
1. In a rotative-friction brake, the retaining plate A, block C, curved plate H,
friction bands P P' draught band R and the wooden hub into which pins are driven
vertically substantially as above described for the purposes specified, and working as
above explained, with the right to substitute other parts for those above mentioned
wherever desirable.
2. In a rotative-friction brake, the above described arrangement by which an
instantaneous or gradual stoppage may be effected in any direction, for instance :
when the vehicle is drawn forward, when it is drawn backward (as in the case of
certain tramcars), or when the vehicle slips backward down an incline, or when the
horse backs, said brake being worked either by the driver, or automatically upon the
fall of a horse or other sudden stoppage.
Dated this 3rd day of December 1888.
C. URQUHART FISHER,
Agent for A. C. T. Bautain..