IMPROVED MECHANISM FOR CONVERTING RECIPROCATING RECTILINEAR MOTION INTO ROTARY MOTION, AND FOR CONVERTING ROTARY MOTION INTO RECIPROCATING RECTILINEAR MOTION
Year: 1869

page_text: PROVISIONAL SPECIFICATION left by Charles Denton Abel at the
Office of the Commissioners of Patents, with his Petition, on the
3rd August 1869.-A communication from abroad by Onésime
Alexis Benjamin Martin and Leopold Fréderic Bazin, both of
No. 23, Boulevart de Strasbourg, Paris, France.
I, CHARLES DENTON ABEL, of No. 20, Southampton Buildings,
Chancery Lane, in the County of Middlesex, Patent Agent, do hereby
declare the nature of the said Invention for "IMPROVED MECHANISM FOR
CONVERTING RECIPROCATING RECTILINEAR MOTION INTO ROTARY MOTION, AND FOR
CONVERTING ROTARY MOTION INTO RECIPROCATING RECTILINEAR MOTION," to be
as follows:-
This Invention consists of an improved mechanism for converting
reciprocating rectilinear motion into rotary motion, and vice versa,
whereby the disadvantage attendant on the crank and connecting rod
mechanism in producing a variable rotary motion from a constant
rectilinear motion or a variable rectilinear motion from a constant rotary
motion, as the case may be, is more or less entirely obviated. For this
purpose a pinion fixed upon the shaft or spindle that is to receive rotary
motion, or the rotary motion of which is to be converted into rectilinear

page_text: reciprocating motion, is situated inside a loop or fork carried by the
piston or other rod that is to receive motion from or impart motion to
the said shaft, on each side of which loop or fork is formed a rack.
These racks are capable of being put alternately in gear with the
opposite sides of the pinion by causing the loop or fork at the end of
each rectilinear motion in one direction or the other of the piston or
other rod to rock in bearings fixed on a frame supporting the pinion
shaft, so that the rotary motion of the latter in being imparted
alternately in opposite directions to one or other of the racks will cause
these to impart the required constant reciprocating motion to the rod to
which they are attached, or vice versa, the reciprocating motion of such
rod in being imparted alternately in opposite directions to opposite sides
of the pinion will produce a constant or nearly constant rotary motion
in one and the same direction of the shaft.
The arrangement of the rocking racks and mode of effecting their
rocking motion may be variously modified. Thus in one arrangement
a description of pallet rocking on centres carried by the before-mentioned
frame is supported in contact with the loop or double rack which carries
two studs that alternately at the end of each motion of the racks strike
against and impart a slight end motion to the pallet. By such motion
one of two inclines carried at opposite ends, and on opposite sides of the
latter is brought against one of two studs carried by the frame, whereby
the pallet is caused to incline to the one side or the other, and con-
sequently also to produce the required rocking motion of the racks.
The pallet is held securely in its inclined position by spring catches
until acted upon in the opposite direction by the other stud on the racks.
In another arrangement more particularly adapted for converting
rotary motion into reciprocating rectilinear motion, the pinion shaft
carries an arm which in revolving therewith comes in contact with two
inclined surfaces formed or fixed to the under side of the looped racks,
and in alternately sliding against the one or the other of these surfaces
effects the throwing over of the racks alternately from the position
in which they gear with the one side of the pinion to the opposite
position.