Improvements in Stethoscopes.
Year: 1896

page_text: Improvements in Stethoscopes.
I, CARI, AUGUST TESKE of 6 Moore Street, Chelsea, in the County of Middlesex,
Surgical Instrument Maker, do hereby declare the nature of this invention to be as
follows:-
According to this invontion tho stethoscopo consists of an elastically mounted
funnel preferably with hollow walls. In one method of construction the inner edge
of an annular sheet of soft indiarubber is held between a metal disc and the turned
over edge of a metal funnel whose stem passes through the disc whilst the outer
edge of the indiarubber is held in a box open at the frout to expose the mouth of
the funnol and having a connection at the rear for the tube leading to the ear. A
spring or compressed air buffer may bo employed to act on the funnel and so
regulate the tension of the rubber. For some observations the opening of the
funnel is stopped by a stem carrying a disc or button.
Upon the tnbe or tubes leading to the ear or ears I place a sound regulator
consisting of a small air holo the size of which can be adjusted by means of a cock.
When administering anaesthetics I employ two stethoscopes one at the heart and
the other at the throat below the Adams applo.
These stethoscopes may have their cases made entirely of soft rubber and may
be either with or without the funnel.
The sound conductors are flexible tubes passing out at the sides of the cases and
are connected together, to a kind of connecting tubing which has two inlets and
two outlets (sound diffuser) a stop-cock being placed between the heart and this
diffuser. The stethocopes can be held in position by the rubber tubing passing
over the bell shaped cups and the ends being tied together, one around the body,
and the other around the neck. The thin tubing divides itself into two parts
forming a kind of loop hole placed over the bell cup, and pressing on the rim of it,
joining again. The same arrangements apply to the neck also. The metallio
stethocopes when made very light can be used for the same purpose.
Dated thin 10th 1on of Au 190G

page_text: COMPLETE SPECIFICATION.
Improvements in Stethoscopes.
I, CARL AUGUST TESKE, of 6 Moore Street, Chelsea, in the County of Middlesex,
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 :-
According to this invention the stothoscope consists of an elastically mounted
funnel preferably with hollow walls. In one method of construction shown in
elevation at Figure 1 and in section at Figure 2 an annular sheet a of soft india-
rubber is held between a metal disc b and the turned over edge c' of a metal
funnel c whose stem d passes through the disc. The stem d consists of a metal
eyelet having its ends rivetted over the disc and the inside of the funnel. The outer
edge of the indiarubber a is held in a box open at the front to expose the mouth of
the funnel and having a connection at the rear for the tube leading to the ear.
The box consists of a tube e an end plate el and a collar e screwing into the tubo
and holding the end in place. The tube e has an inwardly projecting flango
bearing on the india-rubber a. The end plate el has a flange et bearing on a narrow
annular piece of indiarubber f which in its turu bears on the indiarubber a and on
its other face a tube e over which fits the tube g leading to the ear. In the
example shown the tube g has two branches g' one for each ear.
For some observations the opening of tho funnol is stopped by a stom h carrying
a disc or button h'.
Upon the tube or tubes leading to the ear or ears I place a sound regulator
consisting of a small air holo the size of which can be adjusted by means of a
cock j.
This cock has a hollow plug j¹ into which the air hole j3 and the cross passage j³
open. By turning the plug the ends of the latter can be brought more or less
opposite to ports in the shell connected by short pipes kk with the pipes g1 gl.
When adininistering anaesthetics I employ two stethoscopes as shown at Figure 3
one l at the heart and the other m at the throat below the Adams apple.
These stethoscopes may have their cases made entirely of soft rubber and may be
either with or without the funnel, and with or without the thin rubber membrane.
The sound conductors are flexible tubes 'm' passing out at the sides of the cases
and are connected together, to a kind of connecting tubing n which has two inlets
and two outlets (sound diffuser) a stop cook n' boing placed between the heart and
this diffuser. The outlets are connected by a bow spring n³ so as to adjust them-
selves and keep in position on the head of the observer. The stethoscopes can be
held in position as shown in Figure 4 by lengths of rubber bands or tubing o passing
over the boll shaped cups and the onds being tied together, one around the body,
and the other around the neck. The thin bands or tubing divides itself into two
parts forming a kind of loop hole placed over the boll cup, and pressing on the rim
of it, joining again. The same arrangements apply to the neck also. The metallic
stethoscopes when made very light can be used for the same purpose.
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 what I
claim is:-
1. Stothoscopes having au elastically mounted funnel.
n
Stathonernas having an elastically mounted funnel with hollow walle

page_text: 3. The method of constructing the stethoscopes referred to in Claims 1 and 2
substantially as described.
4. Stethoscopes having on the tube leading to the ear an air hole whose size can
be adjusted.
5. Stethoscopes substantially as described and shown at Figures 1 and 2 of the
drawings.
6. The combination of a pair of stethoscopes connected by branches to a common
tube and a stop cock on one of the branches.
7. Stethoscopes substantially as described and shown at Figures 3 and 4 of the
drawings.