IMPROVEMENTS IN MACHINERY FOR CONVERTING ROTARY INTO RECIPROCATING MOTION
Year: 1878

page_text: LETTERS PATENT to Anker Heegaard, of Copenhagen, Manufacturer, for the
Invention of "IMPROVEMENTS IN MACHINERY FOR CONVERTING ROTARY INTO
RECIPROCATING MOTION."
Sealed the 13th June 1878, and dated the 2nd April 1878.
PROVISIONAL SPECIFICATION left by the said Anker Heegaard at the Office
of the Commissioners of Patents on the 2nd April 1878.
ANKER HEEGAARD, of Copenhagen, Manufacturer. "IMPROVEMENTS IN MACHINERY
FOR CONVERTING ROTARY INTO RECIPROCATING MOTION."
For the transformation of a rotary motion into a reciprocating one there is
generally used a crank, or a crank wheel with a pitman, or an eccentric with an
eccentric rod. The motion of the driving gear is generally convexed on the crank
or the eccentric by more or less sets of cog wheels, in order to modify according to
the necessity of the work the rapidity of the crank or the eccentric.
By this mechanism, called for destinction "the star," for the transformation of a
rotary motion into a right-lined reciprocating one, a great number of the mentioned
cog wheels and other mechanisms are avoided, in order to modify the rapidity of
the motion. The mechanism is simplified by this means, and the friction is lessened,
without the change in the direction of the reciprocating motion being more abrupt
than by the use of the crank.
Figure 1 is a top view; Figure 2, a rear elevation, as it may be applied, for
instance, to a mowing machine.
Figure 3 shows the new mechanism itself seen in perspective.
The essential part of the new mechanism is a double star wheel H, consisting of
two separate star discs, provided each on the design with 5 cams, but for the rest
they may have more or less. Of the two separate star discs of this star wheel each
works in its turn upon its roller P, each situated on its arm of the angular lever N.
The pins K of the last mentioned are in bearers, which may be adjusted by the
screws T in such a manner that the distance of the angular lever from the star
disc H may be regulated according to the wear and tear. "By a third arm G and a
ID 671

page_text: connecting rod L the angular lever is joined to the cutter bar, which reposes in the
finger bar M.
The double star disc H gets its turning motion from the drawing wheel by the
bevelled wheels D and F, which at the same time produce a convenient proportion
of revolution for the rapidity. F is placed on the axle G of the star disc H, while
D is loosely attached to the axle of the driving wheel, but it may revolve with or
be liberated at will from the communication by the tooth joint coupling E; A is
the frame of the machine.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Anker Heegaard in the Great Seal Patent Office on the 24th Sep-
tember 1878.
ANKER HEEGAARD, of Copenhagen, Manufacturer. "IMPROVEMENTS IN MACHINERY
FOR CONVERTING ROTARY INTO RECIPROCATING MOTION."
For the transformation of a rotary motion into a reciprocating one there is
generally used a crank, or a crank wheel with a pitman, or an eccentric with an
eccentric rod. The motion of the driving gear is generally convexed on the crank
or the eccentric by more or less sets of cog wheels, in order to modify according to
the necessity of the work the rapidity of the crank or the eccentric.
By this mechanism, called for distinction the "star," for the transformation of a
rotary motion into a right-lined reciprocating one, a great number of the said
mentioned cog wheels and other mechanisms are avoided, in order to modify the
rapidity of the motion. The mechanism is simplified by this means, and the
friction is lessened, without the chango in the direction of the reciprocating motion
being more abrupt than by the use of the crank.
Figure 1 is a top view; Figure 2, a rear elevation, as it may be applied, for i
instance, to a mowing machine.
Figure 3 shews the new mechanism itself seen in perspective.
The essential part of the new mechanism is a double star wheel H, consisting of
two separate star discs provided each on the design with five cams, but they may
have more or less. Of the two separate star discs of this star wheel each works
in its turn upon its roller P, each situated on its arm of the angular lever N.
The pins K of the last mentioned are in bearers, which may be adjusted by the
screws I in such a manner that the distance of the angular lever from the star
disc H may be regulated according to the wear and tear. By a third arm G and a
connecting rod L the angular lever is joined to the cutter bar, which reposes in the
finger bar M.
The double star disc H gets its turning motion from the drawing wheel by the
bevilled wheels D and F, which at the same time produce a convenient proportion
of revolution for the rapidity. F is placed on the axle G of the star disc H, while
D is loosely attached to the axle of the driving wheel, but it may revolve with or 4

page_text: be liberated at will from the communication by the toothed joint coupling E; A is
the frame of the machine.
Having now described and particularly set forth the nature of the said Invention,
and the manner of carrying the same into effect, I would have it understood that
what I claim is, the mechanism called the "star" for the transformation of a rotary
motion into a reciprocating one, consisting of a double star whoel H put into
motion either by cog wheels or directly by an angular lever N, which, with rollers P
on its two arms, touches the two separate star discs of the double star wheel, whilst
a third arm is connected with that part of the machine which is going to have given
to it the reciprocating motion.
In witness whereof, I, the said Anker Heegaard, have hereunto set my
hand and seal, this Seventeenth day of September, in the year of our Lord
One thousand eight hundred and seventy-eight.
ANK, HELGAARD. (LS.)