An Apparatus for Recording the Speed of the Governors of Motive Power Engines.
Year: 1894

page_text: COMPLETE SPECIFICATION.
An Apparatus for Recording the Speed of the Governors of Motive
Power Engines.
I EMIL LACHMANN, Merchant of 19 Kaiser Wilhelmstrasse, Berlin in the
Empire of Germany, 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:—
This invention relates to a speed recording apparatus which graphically records
all the positions of the governor during a determined period of time.
The said apparatus is shown in elevation in the accompanying drawing.
A rod E (guided in a ring or guideway D parallel to the axis of the governor)
engages by means of a fork C in the collar formed in the sleeve B to which the
governor balls carried on the arms A (of any motive power engine thus governed)
are attached so that the upward or downward movement of the sleeve B caused
by the action of said governor balls is thereby imparted to the fork C and rod E
carrying same.
30
The other end of the rod E operates one end of a lever F which is mounted to
turn on a fixed pin y and is arranged at right angles to the vertical axis of the
governor balls.
The other end of the lever F carries a pencil which works on a disc G which is
provided with paper and is divided to a scale and is kept in rotary motion (at any
desired speed) by means of clockwork.
The lever For the end thereof carrying the pencil will assume various positions
relatively to the centre or to the circumference of the disc G according as the
movable sleeve B of the governor is moved into its various positions up or down
with the result that the continued motion or shifting of the governor will cause the
pencil to draw a curve corresponding to the position of the arms A and thereby
indicate the speed of the governor.
From this curved or other line thus drawn on the disc G all variations in the
speed of said governor can be seen and can be readily computed by the proper
mathematical methods and calculations.
By the term "pencil" I wish it to be understood that I mean and intend thereby
to refer to any suitable marking instrument or appliance capable of being used to
delineate the desired record on the disc G.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
A speed recording device to operate in conjunction with governors of the character
described of motive power engines and consisting of the arrangement and combi-
nation of a pivotted lever provided with a pencil a sleeve on the governor axis
operated by the governor balls, a connecting lever between said pencil lever and
said sleeve so that the movement of said sleeve is imparted by said connecting
lever to said pencil lever and a disc rotated by clockwork in contact with the pencil
carried in said pencil lever so that a line is thereby drawn on said disc substantially

page_text: in the manner and for the purposes hereinbefore described and illustrated in the
drawings hereunto annexed.
Dated this 11th day of January 1894.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant