IMPROVEMENTS IN DYNAMOMETERS
Year: 1885

page_text: I, ARNOLD BUDENBERG of 1 Southgate Manchester in the County of Lancaster
Engineer do hereby declare the nature of my invention for IMPROVEMENTS IN
DYNAMOMETERS to be as follows:-
These Improvements relate to Dynamometers employed in measuring direct
stresses and have for their object the construction of an instrument of a simple
character which shall be capable of indicating the amount of stress applied to it.
A dynamometer constructed according to this Invention consists of an oval or
elliptical link similar in plan to the link of a chain and formed of steel or other
metal capable of recovery of form when a stress applied to it has been removed.
To the inner surfaces of the link and about opposite to each other at the smaller
diameter are attached or secured two short pins, studs or projections. The ends of
the link are enlarged and have holes formed thereiu through or to which bolts or
shackles may be secured for the application of the stress. Between the pins, studs
or projections, a suitable pressure gauge is mounted in such a manner as to indicate
upon a dial by its index the amount of tension or stress to which the dynamometer
may be submitted. This is secured in the following manner: When the link is
subjected to a direct pull the link will tend to elongate and at the same time the
studs, pins or projections will tend to approach each other. The motion of approach
is transmitted to the quadrant of the pressure gauge and thence through the pinion
gearing with the quadrant to the index of the gauge. The dial of the gauge is
graduated to indicate the actual stress corresponding with the amount of motion of
approach or recess of the studs, pins or projections.

page_text: •
Improvements in Dynamometers.
I, ARNOLD BUDENBERG of 1 Southgate Manchester in the County of Lancaster
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 :-
These Improvements relate to Dynamometers employed in measuring direct
stresses and have for their object the construction of an instrument of a simple
character which shall be capable of indicating the amount of stress applied to it.
A dynamometer constructed according to these Improvements is illustrated in
plan in Fig. 1 and in longitudinal section in Fig. 2 on the accompanying sheet of
Drawings to which reference is hereinafter made.
In each of the Figures similar parts are denoted by similar letters.
The apparatus consists of an oval or elliptical link A similar in plan to the link
of a chain and formed of steel or other metal capable of recovery of form when a
stress applied to it has been removed. To the inner surfaces of the link are attached
or secured about opposite to each other at the smaller diameter two short studs pins
or projections B B. The ends CC of the link may be enlarged and have holes
formed therein to which bolts or shackles may be secured for the application of the
stress. Shackles are shown on the Drawing thus attached and are denoted by the
letter D. Between the studs B B₁ or their equivalent a suitable pressure gauge E
is mounted in such a manner as to indicate on its dial by its index finger the
amount of tension or stress to which the dynamometer may be submitted. This is
secured in the following manner: When the link is subjected to a direct pull it will
tend to elongate and at the same time the projections B B' will tend to approach
each other. One of the projections B is attached to the framing of the pressure
gauge and the other B to the toothed quadrant or to an arm or lever attached
thereto. The motion of approach of B B¹ is therefore transmitted to the quadrant
and thence through the pinion gearing with the quadrant to the index finger of the
gauge. The dial of the gauge is graduated to indicate the actual stress applied as
ascertained by experiment.
As represented in Fig. 1 the black finger will indicate the actual stress while the
finger shown in outline is a maximum pointer as commonly used on pressure
gauges.
I desire it to be understood that I do not claim broadly, the application of a
pressure gauge for the purpose of indicating the amount of stress or strain applied
to a dynamometer and that I do not limit myself to the precise details of
construction herein before described as these may be varied without departing from
the Invention as communicated to me.
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 a dynamometer, the combination of an elastic link having projections on
its opposed inner faces with a pressure gauge, substantially as and for the purpose

page_text: herein before set forth and described and as illustrated on the accompanying sheet
of Drawings.
(2.) In a dynamometer the arrangement or adaptation of a pressure gauge to an
elastic link in such a manner that the tendency of the link to close up shall actuate
the index finger of the pressure gauge and thus indicate on a graduated dial the
amount of stress or tension applied to the link substantially as hereinbefore set
forth and described.