IMPROVED MECHANISM FOR CONVERTING ROTARY INTO RECIPROCATING MOTION
Year: 1884

page_text: COMPLETE DI ECIFICA
I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake & Co, Patent Agents,
Southampton Buildings, London, in the County of Middlesex do hereby declare
the nature of said invention for "IMPROVED MECHANISM FOR CONVERTING ROTARY
INTO RECIPROCATING MOTION," and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-
This invention relates to mechanism for converting rotary motion into recipro-
catory motion, and has for its object to provide cheap and compact mechanisin of
this class.
The said invention comprises the novel construction and arrangement of parts
as hereinafter described.
In the accompanying drawing
Figure 1 is an elevation of mechanism constructed according to this invention
the shaft being removed.
Figure 2 is a transverse section of the same on the line x, x, and
Figure 3 is a perspective view of the automatically oscillating cam pawl..
A indicates a rotating shaft furnished with a pin B, and C a vibrating or
reciprocating rod or bar, furnished with a pin D. È indicates a cam pawl which
is pivotted on the said pin D. This pawl is made with three arms F, G G. The
arm F has cam faces ff against which the pin B presses in the act of producing
the reciprocating motion, and the two arms G are used to cause the arm F to be
thrown alternately upon opposite sides of the stud or pin D. The metal between
these arms G is cut away, as at H, and thus allows a stud L to project up from
the bar C and arrest the oscillations of the pawl E by catching the said arms G.
The centres of the studs D and L should both be in a plane parallel to the plane
in which the pin B moves or at right angles to the shaft A, and the total distance
of reciprocation is equal to the sum of the diameters of the studs Land B plus the
thickness of each of the arms G, or from a point g to a point g¹.
To
The face of the pawl E next to the bar C is flat, but that next to the shaft A
is curved, as at I, the curve being of a sufficiently large radius to enable the said
pawl to oscillate, it being kept in place upon the stud D by the shaft A.
ensure the said pawl being retained in its extreme positions, a friction device may
be used, as for instance, a plate of spring metal J is loosely supported on the stud D

page_text: and interposed between the pawl E and the bar C, and its upper edge is slotted, as
at M, the piece cut therefrom being bent down to form the spring K, which presses
against the face H¹ of the pawl, and, if desired, catches in notches or depressions h
at each extremity of the said face H¹. The slot M receives the upper pin L and
the plate is thus held from turning.
The operation of this mechanism is as follows, that is to say-The shaft being
rotated as indicated by the arrow, the pin B strikes one cam face f of the arm F
and upon continuing its movement, causes the bar C to be moved in one direction.
As soon as the. pin B is about in line with the pin or stud D its further movement
causes the pawl to be oscillated on the stud D, as the pin B. strikes the arm G
and presses it up until it is arrested by the stud L, but this latter movement does
not impart any motion to the bar C as that has come to rest before the pawl is
shifted. The next time the pin B comes around, it strikes the other cam face f of
the arm F and throws the bar C in the opposite direction, and then shifts the pawl
as before. By the use of this device it is easy to cause the reciprocation to take
place within any desired part of the entire revolution of the shaft. The device is
simple and can readily be attached to any rotating shaft with but little expense.
I do not limit myself to the exact construction shewn in the drawing as it
may be modified in various ways without departing from the nature of this
invention.
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 :-
First. The combination of a rotating shaft provided with a pin, with a recipro-
cating or vibrating bar, and a pawl pivotted thereto, the said pawl having two
cam-faces so constructed that when struck by the pin they reciprocate the bar and
also two arms or surfaces arranged to be struck alternately after the completion of
each single vibration of the bar, to alternately oscillate the said pawl and cause it.
to present the cam faces alternately to the revolving pin, substantially as, and for
the purpose, specified.
Second. The combination of a rotating shaft provided with a pin, with a
reciprocating or vibrating bar, and a pawl pivotted thereto, the said pawl having
two cam-faces so constructed that when struck by the pin they reciprocate the bar,
also two arms or surfaces arranged to be struck alternately after the completion of
each single vibration of the bar to alternately oscillate the said pawl and cause it
to present the cam faces alternately to the revolving pin, and a stop to limit
the oscillations of the said pawl, substantially as, and for the purpose, specified.
Third. The combination of a rotating shaft provided with a pin, with a recipro-
cating or vibrating bar, and a pawl pivotted thereto, the said pawl having two
cam-faces so constructed that when struck by the pin they reciprocate the bar, also
two arms or surfaces arranged to be struct alternately after the completion of each
single vibration of the bar to alternately oscillate the said pawl and cause it to
present the cam faces alternately to the revolving pin, and a friction device to
retain the said pawl in any position in which it is placed, substantially as, and for
the purpose, specified.
Fourth. The combination of a rotating shaft provided with a pin, with a
reciprocating or vibrating bar, and a pawl pivotted thereto, the said pawl having
two cam-faces so constructed that when struck by the pin they reciprocate the bar,
also two arms or surfaces arranged to be struck alternately after the completion of
each single vibration of the bar, to alternately oscillate said pawl and cause it to
present the cam faces alternately to the revolving pin, a stop to limit the oscillations
of the said pawl, and a friction device to retain the said pawl in any position in
which it is placed, substantially as, and for the purpose, specified.
Fifth. The combination of the shaft A having the pin B, the bar or arm C
having the pins D and L, the pawl E having the arms F and G, G, and the slot H,
substantially as, and for the purpose, specified.

page_text: Sixth. The combination of the shaft A having the pin B, the bar or arm C
having the pins D and L, the paw! E having the arms F and G, G, the slot H, and
friction spring K, substantially as, and for the purpose, specified.
Seventh. The combination of the shaft A, having the pin B; the bar or arm C
having the pins D and L, the pawl E having the arms F and G, G; the face H
having the depressions h h, the slot H, and the spring K, substantially as, and for
the purpose, specified.
Eighth. The combination of the shaft A having the pin B, the bar or arm C
having the pins D and L, the pawl E having the arms F and G, G, the slot H, the
plate J, and the spring K, substantially as, and for the purpose, specified.
HASELTINE, LAKE & Co.,
For the Applicant.