IMPROVEMENTS IN APPARATUS OR DEVICES FOR CONVERTING RECIPROCATING INTO ROTARY MOTION
Year: 1883

page_text: LETTERS PATENT to Henry Burt of Southampton in the county of Hants for
an Invention of IMPROVEMENTS IN APPARATUS OR DEVICES FOR CONVERTING
RECIPROCATING INTO ROTARY MOTION
"
PROVISIONAL SPECIFICATION left by the said Henry Burt at the Office of
the Commissioners of Patents on the 23rd May 1883.
HENRY BURT of Southampton in the county of Hants "IMPROVEMENTS IN
APPARATUS OR DEVICES FOR CONVERTING RECIPROCATING INTO ROTARY MOTION
"
In a suitable framework are provided one or more levers (by preference two)
pivotted nearer one end when an increase of leverage is desired and having a
connecting rod at the end which takes on to a crank of the shaft to be driven.
When two levers are employed there would be two cranks placed at right angles
to one another or nearly so, and with three levers there would be three cranks
dividing the circle equally.
A friction surface like an inclined plane or curved is provided at the other end
of each lever and where there are two levers a heavy wheel or disc in adjustable
or sliding bearings vibrates or oscillates between them. Upon the disc are
projections or friction rollers or equivalent suitably arranged so as to work upon
the friction surfaces of the levers and by depressing these as the disc oscillates
motion is given through the connecting rods to the shaft to be driven.
Instead of the friction surfaces and projections upon the disc, connecting rods
can be used to impart the motion from disc to levers; and instead of the disc a
shaft having the requisite cranks or equivalent and provided with a balance lever
weighted if desired could be employed. The reciprocating motion is imparted
from the source of power say electricity for instance in any. convenient manner to
the disc or equivalent and by it and the levers converted into a rotary motion
communicated to the shaft.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Burt in the Great Seal Patent Office on the 23rd November
1883.
HENRY BURT of Southampton in the County of Hants.
"IMPROVEMENTS IN
APPARATUS OR DEVICES FOR CONVERTING RECIPROCATING INTO ROTARY MOTION"
In a suitable frame-work are provided one or more levers (by preference two),
pivotted nearer one end when an increase of leverage is desired, and having a
connecting rod at the end which takes on to a crank of the shaft to be driven
Where two levers are employed there would be two cranks placed at right angles
to one another or nearly so, and with three levers there would be three cranks
dividing the circle equally.
A friction surface like an inclined plane or curved, is provided at the other end
of each lever and where there are two levers a heavy wheel or disc in adjustable or
sliding bearings vibrates or oscillates between them. Upon the disc are projections
or friction rollers or equivalent suitably arranged so as to work upon the friction
surfaces of the levers and by depressing these as the disc oscillates motion is given.
through the connecting rods to the shaft to be driven.
Instead of the friction surfaces and projections upon the disc, connecting rods
can be used to impart motion from disc to levers-and instead of the disc a shaft
having the requisite cranks or equivalent and provided with a balance lever
weighted if desired could be employed
The reciprocating motion is imparted from the source of power-say electricity
for instance in any convenient manner to the disc or equivalent and by it and the
levers converted into a rotary motion and communicated to the shaft.
In the accompanying drawings in which like letters of reference represent like
parts, Fig 1 is a side elevation of the apparatus part of the framing being removed,
Figure 2 is a plan, and Figure 3 an end elevation.
A is the disc or equivalent carried upon the shaft A¹ which oscillates in the
bearing blocks A2 carried in the slotted frames A³-I. I are the friction rollers,
projections or equivalent which as the wheel oscillates alternately depress the ends
of the levers B and C which are pivotted at B and have turned-up ends B¹ and C¹
as shewn in Figure 1. D and E are short levers pivotted at K to which are jointed
the connecting rods F and G which take hold of the cranks L and M of the shaft N
as shewn in Figures 1 and 3. O is a fly wheel and the action is as follows.
The reciprocating motion being imparted from the source of power to the disc,
the friction rollers I, I, alternately depress the ends of the levers B and C thereby
raising their turned up ends B and C which in their turn raise the small levers D
and E which impart the motion through the connecting rods F and G to the
shaft N, it being understood that the cranks L and M are set at right angles to
each other upon the shaft and the projections I. I so placed upon the disc A as to
depress the levers B and C at the proper time to operate the levers D and E
and connecting rods F and G harmoniously with such setting of the Cranks.
If If three sets of levers were employed the three cranks would be so placed as
to divide the circle into three equal parts.
In some cases, as for instance when no fly wheel O is used and it is necessary to
bring the levers D. E back to their starting point, I employ a shackle P which is
jointed to the straps D¹ and E' a weight Q being suspended by some form of
anti-friction bearing, so that it is free to roll upon the shackle P from side to side
so as to accommodate itself to the working of the apparatus.

page_text: Having thus described my invention and the method of performing the same
I claim.
As a mechanism for converting reciprocating into rotary motion the combination
with the reciprocating disc A or its mechanical equivalent of the levers B. C
and D. E, connecting rods F. G and crank shaft N constructed and operating
substantially as described and illustrated.
In witness whereof I the said Henry Burt have hereunto set my hand and seal
this twenty second day of November in the year of our Lord One thousand
eight hundred and eighty three.
HENRY BURT. (L.S.)