Improvements in Artificial Legs.
Year: 1892

page_text: Date of Application, 21st Nov., 1892
Complete Specification Left, 10th July, 1893-Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Artificial Legs.
I, HENRY SAUR of 8 Riding House Street, Great Portland Street, London,
Surgical Instrument Maker, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the ankle joint of an artificial leg, which has an anterior,
PROVISIONAL SPECIFICATION.
Improvements in Artificial Legs.
I, HENRY SAUR of 8 Riding House Street, Great Portland Street, London,
Surgical Instrument Maker, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the ankle joint of an artificial leg, which has an anterior,
posterior and lateral movement.
The invention consists in the various features of improvement.
In the accompanying drawing:
Fig. 1. is a longitudinal central section of an artificial foot provided with my
improvements.
Fig. 2 is a bottom view of a part of the foot.
Fig. 3 is a section of the hinder part of the foot showing the plate e¹.
Fig. 4. shows the double hinge piece B.
Fig. 5. is a vertical section of the foot through the pin b.
Fig. 6. shows the plates e, e¹.
Fig. 7. shows the plates d, d¹.
The letter A represents a female joint with a slot fitted to the male part of the
double hinge piece B. a pin or tube b passes through from left to right. This joint
performs the anterior posterior movement.
A spiral spring attached to B presses against piece A to facilitate the
movement in the act of walking.
Bas already said is a double hinge piece the upper portion building the male
part of joint A. The lower portion is shaped round entering the part C. as shown
in Fig. 5. A screw passes through B from back to front supported by two steel
plates d-d fixed to part C. This joint performs the lateral movement.
e is a plate fixed to C provided with a short pin which acts as a stop and works
in a slot in the plate e¹ to limit the lateral movement.
D. is a steel spring; one end of which is fixed to the foot C and the other end
to the double hinge piece B, which will spring sufficiently to premit lateral move-
ment, and at the same time bringing it back to its original central position as soon
as the weight of the patient is removed from the foot, this avoiding all elastics and
india rubber springs etc.
f. is an ordinary catgut or spiral spring at the back of the heel to keep the toes
in contact with the ground when standing or walking.
21st November 1892
HENRY SAUR,
Applicant.
COMPLETE SPECIFICATION.
Improvements in Artificial Legs.
HENRY SAUR 8, Riding House Street, Great Portland Street, London, Surgical
Instrument Maker, 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 relates to the ankle joint of an artificial leg, which has an anterior
posterior and lateral movement. This movement is obtained through the medium
of a double hinge piece very simple and solid constructed. A steel spring brings
the joint back to its original central position when a lateral movement has been
performed. Thus avoiding all ball and socket joints elastics etc.

page_text: In the drawings as left with the Provisional Specification,
Fig. I is a longitudinal central section of the leg.
Fig. II is a bottom view of the foot C.
Fig. III is a section through C.
Fig. IV is a seperate view of double hinge piece B.
Fig. V is a cross section through A, B, C.
Fig. VI is a view of plates e and e'.
Fig. VII is a view of plates d and d'.
A is a female joint with a slot fitted to the male part of the double hinge piece B
a pin or tube, passes through from left to right. This joint performs the anterior
and posterior movement.
B is as already said a double hinge piece, the upper portion building the male
part of joint A. The lower portion is shaped round entering the foot C as shown
in Fig. I and Fig. V a secrew passes through from back to front supportet by two
steel plates d and fixed to part C. e is a plate with a stop fixed to C which
works in the slot of a plate el to limit the lateral movement D is a steel spring
fixed at the center at the bottom of the double hinge piece B with one end, and the
center of the foot C with the other end, which will spring sufficiently to permit
lateral movement and the same time bring it back to its original central position as
Boon as the weight of the patient is removed of the foot. This avoiding all elastics
and india rubber springs, etc.
fis a cutgut or spiral spring at the back of the heel to act as the tendam muscel
in the natural leg.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that whai I
claim is :
I. The combination of leg A with foot C through the double hinge piece B and
pinas specified.
II. The combination of double hinge piece B with foot C and spring D as
specified.
III. The combination of double hinge piece B with foot C with pin c, plates d―di
and eel as specified.
10th of July 1893.
HENRY SAUR,
Applicant.