IMPROVEMENTS IN SAFETY STIRRUPS
Year: 1882

page_text: LETTERS PATENT to Alfred Julius Boult of the firm of W. P. Thompson &
Boult Agents for Foreign Patent Solicitors of 323 High Holborn in the
county of Middlesex and 6 Lord Street Liverpool in the county of
Lancaster Engineer for an Invention of "IMPROVEMENTS
IN SAFETY
STIRRUPS " A. communication to him from abroad by Fritz Lehmann, of
Tangerhütte near Magdeburg, German Empire.
PROVISIONAL SPECIFICATION left by the said Alfred Julius Boult at the
Office of the Commissioners of Patents on the 29th August 1882.
ALFRED JULIUS BOULT of the firm of W. P. Thompson & Boult Agents for
Foreign Patent Solicitors of 323 High Holborn in the County of Middlesex and
"IMPROVEMENTS
6 Lord Street Liverpool in the County of Lancaster Engineer.
IN SAFETY STIRRUPS" [A communication to him from abroad by Fritz Lehmann,
of Tangerhütte near Magdeburg, German Empire.]
The object of this invention is to cause the stirrup to become detached from the
stirrup strap should the rider fall from the horse.
The stirrup is divided and hinged at the bottom a strong spring being so placed
as to tend to open the stirrup upon the hinge. The loop also in which the strap
is placed is in halves and opens with the stirrup-There is a side plate of the
same shape and size as the stirrup which is kept by springs a little removed from
the stirrup and a pin projects from this into the upper portion of the stirrup where
the two halves join and overlap-Another pin on the other side enters the same
hole as the first pin and is kept pressed into the hole by a suitable spring it
passes through the near half and into the second half of the joint.-The joint of
the two halves is in a vertical direction--When the foot of the falling rider
presses the side plate the first pin is pressed against the second pin & forces it
out until the ends of both pins are in line with the joint, when there being no pin
across the joint it of course opens and the strap escapes.
In a modified form the strap loop is provided with a tongue or projection which
has a recess in its side & fits into a hole in the top of the stirrup whilst a
horizontal pin attached to the side plate passes through a hole and engaging in the
recess in the tongue holds it fast-Upon the side plate being pressed as before the
pin is pushed farther through the hole until suitable recess in the pin comes
opposite the tongue when it escapes.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Alfred Julius Boult in the Great Seal Patent Office on the
28th February 1883.
"
ALFRED JULIUS BOULT of the firm of W. P. Thompson and Boult, Agents for
Foreign Patent Solicitors, of 323 High Holborn in the County of Middlesex and
6 Lord Street, Liverpool, in the County of Lancaster, Engineer IMPROVEMENTS
IN SAFETY STIRRUPS A communication to me from abroad by Fritz Lehmann
of Tangerhütte, near Magdeburg, German Empire
"
This invention has for its object to protect a rider when falling from his horse,
against the peril of hanging fast in the stirrup.
The stirrup is for this object so constructed, that it can separate from the
stirrup strap and leave the foot as soon as the foot of the falling rider, caught in
the stirrup, acts on a spring. The accompanying drawings represent the stirrup
with the requisite arrangements.
Figure 1. is an elevation of the closed stirrup.
Figure 2. is a plan of the stirrup, the loop for the strap being partly removed.
Figure 3. is a section through the upper part of the stirrup in the direction a b
in Figure 1 and shows the mechanism which forms the fastening of the stirrup.
Figure 4. shows, in elevation, the stirrup opened out.
Figure 5. is a vertical section of the upper part of the stirrup Figure 1.
Figure 6. shows, in side elevation, the stirrup with the foot in that position in
which the front of the foot causes the release of the stirrup.
Figure 7 is a front view of the stirrup with a modified arrangement for detaching
it from the stirrup strap.
Figure 8 is a vertical section through Figure 7 seen edgeways.
Figures 9, 10, and 11 are details and show how the eye of the strap is, by
the entering or withdrawal of the spring pin E attached to or detached from the
stirrup.
The stirrup A Figure 1 consists of two parts BB connected by a hinge C on
which they are movable. The two stirrup pieces B B, Figure 4, form a particular
fastening, the horizontally terminating ends D D' overlapping one another, a pin E
on the spring F (Figure 3) engaging in corresponding apertures drilled in the
two ends.
Each of the two upper ends of the stirrup carries one half of the strap-eye G
Figure 1; they close, when the stirrup halves are folded together, simultaneously
with the latter by their ends taking one upon the other.
The spring F is fixed in front on the upper straight part D of the stirrup
(Figures 2 and 3) It presses the pin E rivetted to its centre so far into the
coinciding apertures of the two upper halves D D when folded together, that said
halves can not be pulled apart unless the pin E is forced back
Below on the plate of the stirrup Figure 1 a strong spring H is mounted
which forces the two stirrup halves apart as soon as the pin E withdraws from the
hole in D' and this releases the fastening of the stirrup halves.
The withdrawal of the pin E within the holes of the two overlapping parts
D, D¹, is effected by pressure upon the pin El upon the front of the stirrup, fixed on
a bar A (Figure 3) and entering the apertures. This pin E' is rivetted onto the
bar A in an appropriate position see Figures 2, 3, 5 and 6.
The bar A. Figures 1, 4, and 6 has the shape of the stirrup and its free end y
loosely fits into corresponding holes in the stirrup plate (Figures 1, 2, 4). The The
upper part of the upright horse shoe shaped bar A is held by the clamps K K
fixed on the stirrup whilst the springs J J rivetted to it, one on each side, tend to
press it somewhat away from the stirrup, Figure 6.

page_text: The play thus provided limits the motion of the pin E' in the holes. A light
pressure of A against B, viz. pressure of pin E' against E is sufficient to release
the fastening of the two parts thereby enabling the spring H to act and the two
halves of the stirrup to fly open.
When the two halves of the stirrup open, the ring R. Figure 1 becomes, together
with the strap, detached from the stirrup allowing the latter to fall. The bar A
inserted in the footplate is in that event also separated from the stirrup as figure 4
shows.
The stirrup Figures, 7 and 8 has no binge, it consists of an entire stirrup piece B.
In this case the eye for the strap is loosely inserted into the stirrup from the top
by means of the tenon or pin O which fits into a corresponding vertical slot of the
stirrup, Figures 9 and 10. A pin in a suitable horizontal aperture passes through
a recess in the tenon within the vertical slot in such a manner that each takes into
a recessed part of the other.
In the position of the pin E¹ shown in Figure 11, the unrecessed part of the pin
bas entered the recess of the tenon O on the strap eye and thereby firmly locks the
latter to the strap; this is the normal position of the pin E' upon the bar A as shown
in Figure 8, the stirrup is there firmly connected with the stirrup strap. The
springs J J on the bar A maintain the same locked. Now when, as in the previous
instance, Figure 6, pressure is, from the front, exerted upon the bar A, the pin E¹
slides in its slot and the place of the unrecessed part which kept the strap eye fast,
is taken by the recess see Figure 10 and the strap eye is detached from the stirrup
as will be readily understood.
Having now described the nature of the said invention and the manner of
performing the same as communicated to me by my foreign correspondent, I
wish it to be understood that what I claim and desire to protect under the
hereinbefore in part recited Letters Patent is:
First: In a stirrup the combination of the halves B B turning on a hinge C, the
bar A with the pin E', the locking pin E on the spring F the strap eye G and
spring H, substantially as described and illustrated in Figures 1 to 6 of the
accompanying drawings.
Second: As a detachable fastening device for stirrups the combination of the
opening spring H, two hinged halves B B carrying the divided strap eye G and
terminating in the interlocking ends D D¹ with the pin E kept in position by
spring F and detaching pin E' upon bar A, all constructed and operating
substantially as and for the purposes set forth and shown in Figures 1 to 6 of the
accompanying drawings.
Third: As a detachable fastening device for stirrups the combination of the
movable bar A carrying recessed pin E' slotted stirrup bar B strap eye G recessed
tenon O all constructed and operating substantially as set forth and shown in
Figures 6 to 11 of the accompanying drawings.
Fourth: As a detaching device for stirrups the combination of the two recessed
pins E¹ and O with the slotted stirrup bar B, constructed and operating
substantially as set forth and shown in Figures 8 to 11 of the accompanying
drawings.
In witness whereof I the said Alfred Julius Boult have hereunto set my
hand and seal this twenty sixth day of February in the year of Our