Year: 1886

page_text: I DONÁT BÁNKI, of Budapest, in the Kingdom of Hungary, Engineer 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:
My Invention relates to a rotary dynamometer, the construction and working of
which I will proceed to describe by reference to the accompanying Sheet of drawing
showing a dynamometer embodying my improvements.
The fixed shaft W carrying freely the loose pullies B and B1 is maintained by
the support A (Figures 1 and 2), and serves for an axis of rotation to the double-
armed lever C..
To one arm of this lever is adapted the cross-head D, which may be adjusted by
the screw E.
:
To the cross-head are fastened the pivots around which revolve the rollers F F 1.
To the opposite arm of this lever is fixed a counter-weight G balancing the lever.
A spring H is secured to tho plate of the support and connected with the lever C
by a steel-band,
An endless belt passes over the pullies B, F, B1 F1. In working, this belt
transmits the movement from one pulley (B1) to the other (B).
Supposing for instance that the pulley B1 is moved by the motor in the direction
of the arrow and that the pulley B transmits the movement to the working
machine the consumption of force of which is to be measured.
-
The upper belts S1 S2 are then in tension and the lower belts S1¹ S 2¹ are loose.
The difference of the tensions ($1 + S2 (S1' + S2')) acts with the arm of
momentum R on the turn of the lever-arm C in a direction opposite to the
elasticity of the spring H.
A recording apparatus registers the movements of the spring. In lieu of the
transmitting belts S1, S2, S 21, S1', a chain or a rope may be used in this device as
well as in the arrangements hereinafter described.
The lever C (Figs 3 and 4) is a lever of the second order, the fulcrum of which
is in N. The directions of the turns are marked in the drawing; it results
therefrom, that in consequence of the difference in the tension of the belts S1 S2¹
and S1 S2 the lever C is pressed downwards.
;

page_text: This pressure is received at the point. b by the balance-beam M; the point of
suspension a of the beam M is maintained by the support T. On one end of the
beam M acts, at the point d, a counter-weight G, balancing the mass which
oscillates round the fulcrum N, and the other end C is connected to the spring H,
the movements of which are registered by a recording apparatus.
The pullies B and B 1 (Figs 5 and 6) are fixed on the parallel shafts W 1 and W.
The lever C, similar to that shewn in the figures 1 and 2, is a double-armed lever
and carries the counter-weight G. The pulley B1 is large enough to receive the
transmitting belt; a pulley B2 is fastened to the shaft W1 for the purpose of
receiving the driving belt of the working machine, the force-consumption of which
is to be measured.
•
The lever C presses at the point b, in consequence of the difference of the
tensions of the belts S1 S2 and S1 S2 upon the beam M which is suspended at a.
The end c of the beam M is connected to the spring H receiving the pressure of
the lever C and balancing the same. The movements of the spring H are registered
by a recording apparatus.
с
Figure 7 of the accompanying drawing shows an arrangement, in which the
length of the lever-arm C is reduced to zero, that is to say, the centre of motion of
the pullies F and F 1 is removed to N 1 in their axis.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed declare that what
I claim is,
The transmission of the force which is to be measured and which acts within
the dynamometer, by belt, chain or rope by means of a device of pullies arranged
perpendicularly to the axis of the driving pullies and the combination of this
device with the measuring and registering apparatus, substantially as described
and shewn in the drawing.