An Improved Means for Producing a Rotary from Reciprocating Motion.
Year: 1893

page_text: Date of Application, 6th June, 1893
Complete Specification Left. 19th Oct.. 1893-Accepted. 25th Nov. 1893
PROVISIONAL SPECIFICATION.
An Improved Means for Producing a Rotary from Reciprocating
Motion.
I GEORGE CHAPMAN, No. 30 Inverleith Row, Edinburgh Letter-press Printer
do hereby declare the nature of this invention to be as follows:-
There shall be two frames, the first having two rectangular slides, crossing each
other in the centre, in which is a lever half the length of either slide, one end
attached to and driven by a piston, the other end taking the rectangular course;
the second frame being parallel to the first leaving a space between, and having
corresponding slides and a lever as the first but the lever impelled from the opposite
rectangular angle, the two levers being connected in the middle by a round bar &
the bar connected by a link or rod to a crank in a convenient position.
5th June 1893.
G. CHAPMAN.
COMPLETE SPECIFICATION.
An Improved Means for Producing a Rotary from Reciprocating
Motion.
I, GEORGE CHAPMAN of 30 Inverleith Row, Edinburgh, in the County of
Midlothian, North Britain, Letter Press Printer do hereby declare the nature of
this invention and in what manner the same is to be performed, to he particularly
described and ascertained in and by the following statement :-
My invention relates to an improved means of producing a rotary motion from a
reciprocating one.
In carrying out my invention I provide two cylinders with pistons and guide
frames set at right-angles to one another and with a space between in which a link
connecting the two piston rods works.
In order that my invention may be properly understood and readily carried into
effect I have hereunto appended three explanatory sheets of drawings in the several
figures of which corresponding parts are marked with the same letters of
reference.
Figure 1 is a side elevation.
Figure 2 is an end elevation.
Figure 3 is a plan of the two cylinders shewing piston-rods, shaft and connecting
links, the guide frames being removed.
AA are the two cylinders; B B the two piston rods; CC the guide frames.
The cylinders and guide frames are placed at right-angles to one another, and
the piston-rods pass and cross each other, one piston being in the middle of its
stroke when the other is beginning or ending its stroke. There is a pin D working
in journals in the crosshead of each piston, and a link E connects the two inner
ends of the pins D. The outer ends of the pins D are connected to the shaft F
by means of the links G. As the pistons move up and down the reciprocating
motion of the piston rods communicates a rotary motion to the shaft by means of
the connecting links E and G.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
The improved method of producing a rotary motion from a reciprocating one

page_text: substantially
drawings.
as hereinbefore described and shewn on the accompanying sheets
U
Dated this 17th day of October 1893.
Bottomley & Liddle,
154, St. Vincent Street, Glasgow, Applicant's Agents.