IMPROVEMENTS IN MACHINERY OR APPARATUS FOR INDI- CATING THE NUMBER OF REVOLUTIONS AND SPEED OF THE DRIVING SHAFT PROVISIONAL SPECIFICATION
Year: 1875

page_text: LETTERS PATENT to Carl Peterson, of 3, Lime Terrace, Woolwich
Road, New Charlton, in the County of Kent, Engineer, for the
Invention of "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR INDI-
CATING THE NUMBER OF REVOLUTIONS AND SPEED OF THE DRIVING SHAFT
PROVISIONAL SPECIFICATION left by the said Carl Peterson at the
Office of the Commissioners of Patents, with his Petition, on the
26th June 1875.
I, CARL PETERSON, of 3, Lime Terrace, Woolwich Road, New Charlton,
in the County of Kent, Engineer, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR INDI-
CATING THE NUMBER OF REVOLUTIONS AND SPEED OF THE DRIVING SHAFT OF
MARINE AND OTHER ENGINES AND OTHER MACHINES AT A GLANCE,” to be as
follows:-
This Invention consists of an apparatus for indicating the number
of revolutions and speed of the driving shafts of marine and other
engines,.

page_text: And in order that my said Invention may be properly understood
I will proceed to describe the same by reference to the annexed
Drawing, wherein a represents the stand or support for the shaft or
spindle b; c is a pulley block, through which the shaft passes, and
by means of which pulley block c motion is communicated to the
apparatus; d is a stop click or catch, which works in the spiral grooved
disc e, which stop d is for the purpose of allowing the disc e to revolve
a certain number of revolutions after the shaft has ceased to make the
same number of revolutions in order to prevent the weight g from
falling or rising too quick; f is an elastic washer to break the fall of
the weight g; h, h, are blades or vanes, which prevents the instrument
when placed in a marine engine from oscillating or vibrating, and
regulates its position when the engines are worked in heavy gales of
wind; i, i, are links joined at their lower ends to the top of the weight g,
the other ends being joined to the upper links j, j, which links j, j, are
joined to and supported by the collar or cross piece k; l, l, show a
hollow shaft or quill, through which the main shaft or spindle passes;
m, m, are rods connecting the weight g with the indicator n; v, v, show
a graduated scale, which indicates the number of revolutions of the
driving shaft of the engine or other machine.
This instrument is actuated by means of a wheel fixed on the main
shaft of the engine or other machine, a band or other gearing passing
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Carl Peterson in the Great Seal Patent Office on 2
the 24th December 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CARL
PETERSON, of 3, Lime Terrace, Woolwich Road, New Charlton, in the
County of Kent, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her 8
Letters Patent, bearing date the Twenty-sixth day of June, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Carl Peterson, Her special

page_text: than three places can be made if desired by attaching the other necessary
pullies and wire, &c.
a représents the stand or support for the shaft or spindle 6; c is a
pulley, and by means of which pulley block c motion is communicated
to the apparatus; d is a stop click or catch, which works in a spiral ‹
grooved disc e, which stop d is for the purpose of allowing the disc e
to revolve a certain number of revolutions after the shaft has ceased to
make the same number of revolutions in order to prevent the weight
falling or rising too quick; f is an elastic washer. This and the before.
mentioned parts are only shown in Fig. 2.
The elastic washer f breaks the fall of the weight g; h, h, are the
blades or vanes, which present the instrument when placed in a marine
engine from oscillating or vibrating, and regulates its position when the
engines are worked in heavy gales of wind. In the arrangement shewn
in Fig. 2 the indicating disc A is of sufficient size to perform the object
of the vane h, shewn in Fig. 1; i, i, are links joined at their lower ends
to the top of the weight 9, their other ends being joined to the upper
links j,j, which links j, j, are joined to and supported by the collar or
cross piece k; 1, 2, shew a hollow shaft or guide, through which the
main shaft or spindle 6 passes. In Fig. 1 m, m, are rods connecting
the weight g with the indicator n; r, r, in Figs. 1 and 2 shew a
graduated scale, which indicates the number of revolutions of the
driving shaft of the engine or the machine.
The instrument is actuated by means of a wheel fixed on a main shaft
of the engine or other machine, a band or other gearing working the
pulley block c; X is a break to prevent the instrument from falling or
rising too sudden when attached to a marine engine, when generally
makes a dead stop on account of not having a fly wheel, and have to
be quickly reversed. One end of this break being heavier than the
other, that when set in rotation the centrifugal power acts, and the other
end pulls the instrument round by friction.
A is the round revolving plate, which makes an indication by its
edge; B is a fork fixed to a slide bar O, and actuates the latter by the
rising and falling of the weight g; D is the point of attachment between
sliding bar and chain E on the pulley F, F; G are the copper wires on 8
the pipes H; I is one of the distance undicating dials.

page_text: The fork B has a lubricator J attached to it, as shewn; also the slide
bar C is counterweighted by the sliding weight K attached to the
chain E.
Having thus described the nature and object of my said Invention
I declare that what I claim and desire to be secured to me by the herein-
before in part recited Letters Patent is, the apparatus for indicating the
number of revolutions and speed of the driving shaft of marine and
other engines and other machines at a glance, substantially as herein-
before described and shewn on Drawings, or any mere modification
thereof.
"
In witness whereof, I, the said Carl Peterson, have hereunto set
my hand and seal, this Twenty-fourth day of December, in the
year of our Lord One thousand eight hundred and seventy-
five..