An Improved Stirrup.
Year: 1894

page_text: Date of Application, 12th July, 1894-Accepted, 15th Sept., 1°94
COMPLETE SIMOIFICATION.
An Improved Stirrup.
A communication by JOHANN MARTIN LUDWIG HADDORF, of 31, Krehenstrasse,
Lübeck, and HEINRICH FRIEDRICH HERMANN EGGERS, of Hobbersdorf,
near Schwartau, both in the Empire of Germany, Smith and Farmer,
respectively.
•
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street,
Manchester, both in the County of Lancaster, and 323, High Holborn, in the County
of Middlesex, Civil 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:—
This invention has for its object an improved stirrup, the construction of which
renders it possible, in certain positions of the foot, to produce an automatic
opening of the tread bar. Such a stirrup is shown in Figures 1 to 3 of the
accompanying drawings;
Figures 1 and 3 showing the same when closed,
Figure 2 when opened.
The form of this stirrup in general follows that of the ordinary ones only the
separate parts are connected by means of hinges, in order to allow of the tread
being opened.
For this object the part a, which forms the suspending loop, carries by means of
the hinges and one half 6 of the stirrup, and a bar or tread c capable of being
let down. The parts a and b of the stirrup are connected with one another by
means of a hinged cross piece to which a protecting plate d is attached. The
hinged cross piece consists of the separate hinged pieces e e¹ ff' and
9. The
separate parts are connected by hinges in such a way that the cross bar may bend
from the tread upwards towards the point of suspension of the stirrup. The end
pieces e e¹ of the hinged cross bar, are arranged on the parts a and 6 of the stirrup
in such a way as to be movable to a given angle in order to allow as much play
for the foot as possible, and by the arrangement of the safety plate to afford
security that even when the pressure is applied sideways at an angle au opening of
the stirrup may be possible:
A spring pin is provided in the tread bar c, which is pressed by a spiral
springs, Figure 3, against the tread bar, this spring being enclosed in a cylindrical
cap or case m. The pin h, which is preferably made of vulcanite, or other suitable
material, is intended to avoid slipping and to afford the rider a firm point of
support.
The action of the stirrup forming the object of this application is as follows:-
Assuming that the stirrup has the form shown in Figure 1, in which the part b
of the stirrup is engaged with the bar c; this engagement is formed by means of a
screw which engages in a hole of the cylindrical pin p of the part of the stirrup.
A spiral spring t is placed on this pin, and bears with one end against a projection
on the part of the stirrup, and the other end bears by means of a stop disc against
the part of the tread bar, which can be let down. Both parts and care thus
always strained against one another. If then the hinged cross bar shown in
Figure 1 in a stretched condition be pressed by the foot of the rider against the
link, the hinges will yield, assume the position shown in Figure 2, and release the
stirrup bor its pin p from the fastening. By pressure from below against the hinged
cross bar, the distance between the two parts a and b is reduced, the pin p is drawn
from off the screw, and in consequence of the pressure of the spring t, one end of
017

page_text: the releasable bar or tread springs downwards. A fastening together of the
separate parts takes place by simply shutting up the cross bar from below, by which
means the part 6 of the stirrup is automatically engaged.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated to me
by my foreign correspondents, I declare that what I claim is :-
An improved stirrup characterised by one part of the stirrup and the tread bar
being connected by means of hinges with the other part of the stirrup which is
firmly suspended, the releasing of the one part of the stirrup from the tread bar
being produced by pressure against a hinged cross piece, running between the two
side parts of the stirrup, substantially as described and shown.
CT1
100
WM. P. THOMPSON & Co.,
Agents.