Year: 1888

page_text: I, JOSEF KASALOVSKY of Prague Bohemia, in the Empire of Austria, Engineer,,
do hereby declare the nature of my said 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 an improved recording resistance dynamo-
meter, which may be fitted to driving and loose pulleys, wheels and other rotating
machinery.
My invention consists in fitting fast and loose pulleys, and analogous machinery,
with resistance mechanism, in such a manner that, by causing the loose pulley
to drive the fast pulley, the amount of power applied thereto may be indicated and
recorded.
And in order that my said invention may be particularly described and ascer-
tained reference is hereby made to tho accompanying drawings, in which similar
letters of reference indicate corresponding parts.
Fig. 1 is a sectional elevation of portions of fast and loose pulleys, fitted with my ·
invention, and Fig. 2 is a side view of the same.
N. is a fixed pulley, keyed to the shaft 2. M is a loose pulley fitted to the
same shaft. A is a ring clamped to the boss of the loose pulley, by means of
screws e e. B is a similar ring clamped to the boss of the fixed pulley N by means
of screws e e¹. These two rings A and B have radial arms a¹¹ fitted with pins a b.
Springs F F are fitted so as to act as drag links, one end of each spring being fixed
to a pin a and the other end to a pin b, so that a on the loose pulley may always bo
the leading pin and 6 the following pin, in the direction in which the machinery is
driven; the amount of drag, and consequent extension of these springs affords the
means whereby my invention acts as a dynamometer.
In order to support the recording mechanism I fit the ring U upon the boss of
the fixed pulley N, by means of the screws u' u u. This ring is fitted with a
bracket C, which carries the wheels the axle of which is fitted with a worm gearing
into the worm-wheel R. The bracket also carries a cylinder t² carrying a roll of
paper.
This cylinder is fitted with a spring to keep the roll of paper in tension,
as it is drawn from the cylinder 2 on to the cylinder t¹ fitted to the axle of the
haal R

page_text: The pencil bracket is fitted to a pin a as shown, and a spring f is attached to
the bracket s which presses the pencil y upon the paper cylinder.
A portion of the periphery of the ring U is turned smooth to receive the loose
ring T. This ring T has two grooves, as shown. One of these grooves is in line
with the groove in the wheel S and a band or cord d passes round both. The other
groove m is utilised as hereinafter mentioned.
The operation is as follows: The driving belt being shifted from the fixed pulley N
to the loose pulley M, the power is communicated from M to N through the springs F,
which elongate proportionately to the resistance of the work. The loose ring T is
then held fast and prevented from rotating by means of a band or cord in the groove m,
or by a pin held in. the groove, which acts as a brake, or it is held by other means. As
the pulley revolves with the recording apparatus, the stoppage of the ring T causes
the rotation of the wheel S and the consequent unwinding of the paper coil from t³ to t¹.
The extension of the spring F causes the pencil to rise from the zero line upon
the paper cylinder, and indicate the amount of resistance and power, in a manner
well understood.
In case there is no loose pulley available, I remove the key from the fixed pulley,
equivalent to the wheel N, and use it in the same manner as above described with
respect to the pulley M. I then fix the rings B. U and T together with the recording
apparatus, upon the shaft z, or upon any boss sufficiently near to be so used, and
proceed as above described.
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. In the construction of resistance dynamometers, applied to rotating machinery,
the combination therewith of recording mechanism, operating by the stoppage of,
or the application of a brake to, a portion of the mechanism, substantially as
described.
2. The manufacture and use of rotary dynamometers, consisting of the movable
rings A B and U, the loose ring T, the bracket C carrying the grooved wheel S,
the worm and worm wheel R, the cylinders t¹and t, the latter having a coil
of paper and a spring fin combination with a tracing pencil y carried by an arm s
and fitted with a spring f severally operating substantially as hereinbefore described
and illustrated by the drawings.
3. The general construction, arrangement, and combination of the several and
respective parts, together constituting my invention of an improved rotary dynamo-
meter, substantially as hereinbefore described and illustrated by the drawings.
Date G Deceннoег 1000
LALECH
(01 December Loa
GEO. DOWNING,
8, Quality Court, London, W.C.,
Agent for the Applicant.
GEO.
DOWNING,
8, Quality Court, London, W.C.,
Agent for the Applicant.