Improvements in or connected with Apparatus for Registering the Movements or Pulsations of Physiological or other Subjects.
Year: 1894

page_text: Date of Aplication, 14th July, 1894
Complete Specification Left, 13th Apr., 1895--Accepted, 1st June,
1895
PROVISIONAL SPECIFICATION.
Improvements in or connected with Apparatus for Registering the
Movements or Pulsations of Physiological or other Subjects.
1, DE BURGH BIRCH of de Grey Terrace, Leeds, in the County of York,
Doctor of Medicine, do hereby declare the nature of this invention, to be as
follows:-
The object of my invention is to construct apparatus whereby the movements or
pulsations of physiological or other subjects may be registered in a more ready and
efficient manner than heretofore.
According to my invention I provide a bed plate, on which I mount a vertical
spindle, preferably in ball bearings, which latter hold the said spindle firmly in
position, at the same time allowing of its rotation with the minimum of friction."
On the spindle and above the ball bearings, 1 mount a disc having a smooth
under-surface, and on the upper part of the spindle a recording cylinder is placed,
both the disc and the cylinder being screwed or otherwise clamped to the vertical
spindle.
In a suitable position on the bed plate I mount a bracket, which carries a
horizontal ball bearing at its upper end, such bearing being capable of a rocking
movement in the fixed bracket when required, through the medium of an arm
which hangs down toward the bed plate.
A spindle which is mounted in the aforesaid horizontal ball bearing carries on its
outer end suitable cord pulleys for gearing with any convenient power, whilst the
inner end of the said spindle carries a friction pulley which is adjustable longi-
tudinally on the said spindle.
A spring which is attached to the lower end of the pending arm tends to keep
the horizontal spindle in such a position that the roller rotates in contact with the
disc, and a cam or lever is provided for neutralizing the effect of the spring when
required, and thereby withdrawing the friction pulley from contact with the disc.
On the outer end of the pulleys I provide an inverted cone, which in the event of
the cord slipping, prevents it flying off the machine.
When the apparatus is in use the horizontal spindle is kept continually rotating
through the medium of the cone pulley, and if the cam or lever is in the back
position, the friction pulley is kept in contact with the disc by means of the spring,
and the disc being rotated, turns the recording cylinder at a regular speed, and
enables it to receive the pulsations or other movements of an indicator on its
surface in a regular and constant manner. By moving the cam or lover, the
horizontal spindle rocked and thus breaks the contact between the roller and the
disc, thereby throwing the cylinder out of gear.
By the employment of apparatus as above described, the cylinder may be readily
thrown in or out of gear, and it may also be easily removed for blacking or other
purposes without disarranging the other parts. The ball bearings are also a great
advantage as they enable the apparatus to run firmly and smoothly, whilst the
power required to operate same is very small.
.
By providing an extra foot to the bed plate, the apparatus may be employed as a
horizontal cylinder machine if required.
Dated thi, 14th do- of Iul 1901

page_text: Improvements in or connected with Apparatus for Registering the
Movements or Pulsations of Physiological or other Subjects.
I, DE BURGH BIRCH of de Grey Terrace, Leeds, in the County of York,
Doctor of Medicine, 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 :-
The object of my invention is to construct apparatus, whereby the movements or
pulsations of physiological or other subjects may be registered in a more ready and
efficient manner than hercto!ore.
In order that my invention may be clearly understood, I will proceed to describe
same with reference to the accompanying drawings in which similar letters refer to
like parts in all the figures.
Fig. 1 is a side elevation. Fig. 2 is a front elevation, and Fig. 3 is a plan of an
apparatus constructed according to my invention.
On a bed plate A, I mount a vertical spindle B such spindle being carried by
ball bearings C C, within the hollow standard D which firmly fixed to the bed
plate A by bolts E, thus allowing of the rotation of the said spindle B with the
minimum of friction. On the spindle B above the ball bearings C, I mount and
firmly fix a disc F; and on the upper part of the spindle B a recording cylinder G
is placed, the said cylinder G being clamped in any desired position on the spindle B
by means of a set screw arrangement H.
On the bed plate AI mount a bracket J which carries a horizontal ball
bearing K at its upper end, such bearing being capable of a rocking movement in
the fixed bracket J when required, through the medium of an arm L which hangs
down from the said bearing K towards the bed plate A. A spindle M which is
mounted in the horizontal ball bearing K carries on its end a cone of pulleys N for
gearing with any convenient power, whilst the inner end of the said spindle M
carries a friction roller P which is adjustable longitudinally on the said
spindle M.
A spring R, which is carried by a fixed bracket S and attached to the lower end
of the pendant arm L, tends to keep the horizontal spindle M in such a position
that the roller P rotates in contact with the disc F; and a cam or lever T is
provided for neutralizing the effect of the spring R when required, and thereby
withdrawing the friction roller P from contact with the disc F."
On the outer end of the pulleys N, I provide an inverted cone V, which in the
event of the cord slipping, prevents it flying off the machine.
When the apparatus is in use, the horizontal spindle M is kept continually
rotating through the medium of the cone pulleys N, and if-the cam or lever T is in
the back position, the friction roller P is kept in contact with the disc F by means
of the spring R, and the disc F being rotated, turns the recording cylinder G at a
regular speed, and enables it to receive the pulsations or other movements of an
indicator on its surface in a regular and constant manner. By moving the cam or
lever T, the horizontal spindle M is rocked, thus breaking the contact between the
roller P and the disc F and throwing the cylinder G out of gear.
By the employment of apparatus as above described, the cylinder G may be
readily thrown in or out of gear, and by releasing the set screw H such cylinder G
can be easily removed for blacking or other purposes without disarranging any
part of the apparatus. The ball bearings are also a great advantage, as they
enable the apparatus to run firmly and smoothly, whilst the power required to
operate same is very small.
•
By providing an extra foot on the bed plate A, the apparatus may be employed
as a horizontal cylinder machine if required.

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. The cylinder G, spindle B, and disc F, in combination with the spindle M and
its roller P, substantially as and for the purposes set forth.
2. The combination of the cylinder G spindle B, bearings C C, standard D,
disc F, bracket J, bearing K, arm L, spindle M and roller P, substantially as and
for the purposes set forth.
3. The combination of the bed plate A, spindle B, bearings C C, standard D,
disc F, cylinder G, set screw arrangement H, bracket J, bearing K, arm L,
spindle M, pulleys N, roller P, spring R, bracket S cam or lever T and cone V,
substantially as and for the purposes set forth, together with any mere modification
or modifications thereof.
57
BREWER & SON,
London and Leeds, Agents for the Applicant.