IMPROVEMENTS IN INDICATORS FOR STEAM AND OTHER ENGINES
Year: 1883

page_text: LETTERS PATENT to Arnold Budenberg, of the City of Manchester, in the
County of Lancaster for an Invention of IMPROVEMENTS IN INDICATORS
FOR STEAM AND OTHER ENGINES Communicated to him from abroad by
Christian Frederick Budenberg, of the firm of Schaffer and Budenberg, of
Buckau-Magdeburg in the German Empire
PROVISIONAL SPECIFICATION left by the said Arnold Budenberg at the
Office of the Commissioners of Patents on the 3rd February 1883.
ARNOLD BUDENBERG of the City of Manchester in the County of Lancaster
IMPROVEMENTS IN INDICATORS FOR STEAM AND OTHER ENGINES [Communicated
to him from abroad by Christian Frederick Budenberg, of the firm of Schaffer
and Budenberg, of Buckau-Magdeburg in the German Empire]
These improvements relate to Indicators for Steam and other Engines.
In order to prevent the rotation of the card drum save when required to draw
the atmospheric or datum line and to take the diagram, the lower portion of the
card drum or the pulley attached thereto is provided near the turning point or
position near the cylinder of the indicator when the direction of rotation is reversed
with boles or recesses into which the point of a lever or pin is capable of being
inserted. The position of the lever or pin is governed by a spring or springs in
such a manner that by moving a cam inclined plane or other equivalent device the
point of the pin or lever may be disengaged when the card drum will be free to
receive motion in the usual way from the engine. The cam inclined plane or
similar device being reversed a spring presses the point of the lever or pin against
the surface of the drum or pulley until the turning point is reached when the point
enters the holes in succession until the turning point is reached when the motion
of the druin is arrested. The point of the lever or pin is bevelled or inclined at
an angle on the leading side so that it slides out of the recesses or holes which may
be passed before the turning point is reached, the other side of the pin not being
bevelled or inclined the drum is held in position when the direction of motion
tends to reversal.

page_text: To hold the paper firmly and in tension on the drum two parallel vertical rods
are provided which are centred in a bearing near the top of the drum. An eccentric
disc or cam is fixed near the top of each rod and to each of these cams a button or
handle is affixed. On turning both these buttons in opposite directions the rods
are slightly separated from contact with the drum when the ends of the paper may
be slipped under them. The cams being then moved in the reverse direction the
rods seize the paper between themselves and the drum and the rotation of the rods
pulls the paper tight upon the drum.
To simplify the method of uniting the cord attached to the drum pulley with
the cord attached to some moving part of the engine or a pendulum driven by the
engine a small block is provided within which are pivotted two short arms or
levers. The inner ends of the arms are capable of coming into close contact at an
angle to each other within the block, and their outer ends project beyond the block,
when they are pinned to two other levers which at their further ends are also
pinned to a small plate at the back of the block. The block and end plate are
provided with a thoroughfare for the passage of the cord while the outer side of
the end plate has a hook attached to it. The block and end plate are kept apart
by a spiral spring the tendency of which is also to bring the inner ends of the
arms close together If one of the cords of the indicator or engine is passed
through the thoroughfare of the apparatus, the inner ends of the arms being
inclined to each other the cord may be pulled to any extent freely in one direction
but an attempt to pull the cord in the opposite direction brings the inner ends of
the arms together gripping the cord and compelling the apparatus to move with it
and communicating the motion to the cord attached to the book.
To ensure the parallel motion of the pencil or marking point with the motion
of the piston a comparatively long connecting rod is in conjunction with suitable
linkwork. The connecting rod is connected by a modified ball and socket joint
near to the bottom of a trunk or cylinder which slides through the cap of the
casing of the instrument. The connecting rod is secured by a pin or similar means
to a link which at one end carries the pencil or marking point. This link is
connected to another link the further end of which is pinned to the casing.
Between the point of connection of the connecting rod and main link and the
marking point a radial link is pinned to the main or scribing link. This radial
link is of such a length and is pinned to the main link in such a position as to
secure parallel motion as is well understood.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Arnold Budenberg in the Great Seal Patent Office on the
3rd August 1883.
ARNOLD BUDENBERG of the City of Manchester in the County of Lancaster
Engineer "IMPROVEMENTS IN INDICATORS FOR STEAM AND OTHER ENGINES,"
Communicated from abroad by the firm Schaffer and Budenberg of Buckau-
Magdeburg in the German Empire,
These Improvements relate to Indicators for steam and other engines.
In order to prevent the rotation of the card drum save when required to draw
the atmospheric or datum line and to take the diagram the lower portion of the
card drum or of the pulley attached thereto is provided near the turning point or
position near the body or cylinder of the indicator when the direction of rotation
is reversed with holes or recesses into which the point of a lever or of a pin is
capable of being inserted. These holes are shown at A Fig 1 on the sheet of
drawings hereunto appended. The position of the before mentioned lever or pin B
Figs 1 and 2 is governed by a spring C or by springs in such a manner that by
moving a cam an inclined plane or other equivalent device D the point of the pin
or lever may be disengaged as shown in Fig 2 when the card drum will be free to
receive motion in the usual way from the engine. The cam inclined plane or
similar device being reversed a spring E presses the point of the lever against the
surface of the drum or pulley until the turning point is nearly reached when the
point of the pin or lever enters the holes in succession until the full extent of the
rotation is gained when the motion of the drum is arrested. The point of the
lever or pin is bevelled on the leading side so that it slides out of the holes or
recesses which may be passed before the turning point is reached, the other side of
the pin not being bevelled or inclined the drum is held in position when the
direction of motion tends to reversal. A modification of the arrangement is shown
in Figs 3 and 4.
To hold the card or paper firmly and in tension on the drum two parallel vertical
rods FG are provided which are centered in a bearing H near the top of the drum
Figs 5 and 6. An eccentric disc or cam K is fixed near the top of each rod and to
each of these cams or to the rods a button or handle' L is attached.-On turning
both these buttons in opposite directions the rods are slightly separated from
contact with the drum when the ends of the paper may be slipped under them-
The cams or rods being then moved in the reverse direction the rods seize the paper
between themselves and the drum when the rotative motion of the rods pulls the
paper tight upon the drum.
To simplify the method of uniting the cord attached to the drum pulley with
the cord attached to some moving part of the engine or to a pendulum driven by
the engine a small block 1 is provided within which are pivotted two short arms
or levers 2. 2 Figs 7 and 8.-The inner ends of the arms are capable of coming
into close contact at an angle to each other within the block and their outer ends
project beyond the block or body of the apparatus where they are pinned to two
other levers 3. 3. which at their further ends are also pinned to a small plate 4 at
the back of the block.-The block 1 and the end plate 4 are provided with a
thoroughfare 1, 4¹ for the passage of the cord while the outer side of the end
plate has a hook 5 attached to it-The block and end plate are kept apart by a
spiral spring 6 the tendency of which is also to bring the inner ends of the
arms 2. 2. close together. If one of the cords of the indicator or engine is passed
through the thoroughfare of the apparatus the inner ends of the arms 2. 2. being

page_text: inclined to each other the cord may be pulled to any extent freely in one direction
but an attempt to pull the cord in the opposite direction brings the inner ends of
the arms together gripping the cord and compelling the apparatus to move with it
thus communicating the motion of the cord to the hook to which is looped the
other cord.
To ensure the parallel motion of the pencil or marking point a comparatively long
piston rod a Fig 9 is used in conjunction with suitable link work b―The
connecting rod is attached by a modified ball and socket joint c near to the bottom
of a trunk piston d which slides through the cap of the casing-The connecting
rod may be secured by a pin or by similar means to a link e which at one end
carries the pencil or marking point f―This link is connected to another link the
further end of which is pinned to the casing-Between the point of connection of
the connecting rod to the link b and the marking point a radial link / is pinned
to link b. This radial link is of such a length and is pinned to the main link in
such a position as to secure parallel motion as is well understood.
Having now declared the nature of the said Invention as communicated to me
I desire it to be understood that I do not limit myself to the precise details as the
same may be varied without departing from the said Invention but that what is
claimed is
First. The method of preventing the rotation of the card drum of an Indicator
after the completion of an engine revolution by means of a pin or lever
fitting into holes formed in the lower part of the drum or of the pulley
and governed by a spring or springs and a cam inclined plane or similar
device substantially as and for the purposes herein set forth and
described and illustrated on the annexed sheet of drawings Figs 1. 2. 3.
and 4.
Second. The method of securing the paper on the card drum of an Indicator by
the use of parallel rods and eccentrics substantially as hereinbefore set
forth and described and illustrated in Figs 5 and 6 of the annexed sheet
of drawings.
Third. The apparatus for connecting the cord attached to the drum pulley of an
Indicator with the cord attached to the engine substantially as herein-
before set forth and described and illustrated in Figs 7 and 8 of the
annexed sheet of drawings.
Fourth. The use of a trunk piston and a long connecting rod in combination
with the link substantially as hereinbefore set forth and described and
illustrated in Figs 9 and 10 of the annexed sheet of drawings.
In witness whereof I the said Arnold Budenberg have hereunto set my hand
and seal this thirty first day of July in the year of our Lord one thousand
eight hundred and eighty three
ARNOLD RUDENRERA