Improved Means for Producing Oscillating Motion.
Year: 1892

page_text: Date of Application, 7th June, 1892-Accepted, 16th July, 1892
COMPLETE SPECIFICATION.
[Communicated from abroad by ALFRED BUCKINGHAM WILLCOX, of
No. 512, Washington Boulevard, Chicago, County of Cook, State of
Illinois, United States of America, Mechanical Engineer, and EDWARD
LODER WHITTEMORE, of Toledo, County of Lucas, State of Ohio, United
States of America, Manufacturer.]
Improved Means for Producing Oscillating Motion.
I, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co., Patent
Agents 45 Southampton Buildings in the County of Middlesex, do hereby
declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement, reference being made to the accompanying drawings forming part of
this Specification, and in which
Figure 1, represents a face view of the movement showing the parts in what are
termed the down position.
Figure 2, the same as Figure 1, showing the parts in the position when the shaft
is midway between its extreme movements.
Figure 3, the same as Figure 1, representing the parts in the position as when
the shaft is at its other extreme from Figure 1.
Figure 4, the same as Figure 1, representing the parts in the position as when
the operating shaft commences its return movement.
Figure 5, side view of the apparatus looking from the left of Figure 2.
Figure 6, top view of the same.
Figure 7, modification.
This invention relates to an improved device for mechanical movement, adapted
for use in various machines in which a reciprocating or rotative movement is
required with a rest or dwell for a predetermined length of time at one point of
the movement. Such requirements are found in power-presses, punching-machines,
power-shears, and mechanical feeds for various purposes. The mention of these
will be sufficient to illustrate the general application of the movement, the object
of the invention being to produce the rest or dwell while the rotative movement of
the driving-shaft is continuous and uniform, and the invention consists in the con-
struction and combination of elements as hereinafter described and particularly
recited in the claim.
A, represents the driving-shaft, to which a continuous rotation may be imparted
in the direction indicated by the arrow.
Made fast to the shaft, and so as to
revolve with it, is a crank B, and on this crank two crank-pins C D are arranged,
both being in the same radial line of the crank, but the pin D, more distant from
the center of revolution than the pin C, and as clearly seen in Fig. 1. E, repre-
sents a shaft, to which an oscillating movement is given, and from which the power
to operate the mechanism is to be imparted. The axis of the shaft E, is
parallel with the axis of the shaft A, and from the shaft E, an arm F,
projects, in a plane parallel with the plane of the crank B, and as here represented,
the face of the arm F, is in the same plane as the face of the crank B, as seen in
Fig. 5. From the arm F, a crank-pin G, projects, the axis of which is parallel
with the axis of the two pins CD, and of a length. substantially equal to the two
pins C D. A connection is made between the pin C, of the crank B, with the
pin G, of the arm F, by a connecting-rod H, the rod being provided with a
predetermined extent of lost motion on one pin or the other, here represented as
by a slot I, on the pin C, the slot being of a width corresponding to the

page_text: 1
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diameter of the pin C, but of a length greater than that of the diameter of
the pin.
A second connecting-rod J, in like manner connects the crank-pin D, with the
pin G, the rod J, being constructed with a slot K, in which the pin D, works,
and so that a predetermined extent of lost motion will be permitted between the
crank-pin D, and the pin G.
The arm F is of somewhat greater length than the length of the crank B, and
owing to the lost motion occasioned by the slots I K in the respective connecting-
rods, an oscillating movement only will be imparted to the arm F from the
continuously revolving crank B.
In this
In Figure 1, the arm F, is represented as in its extreme down position.
position the pins stand in a direct line between the center of the shaft A, and the
center of the crank-pin G, in this position the crank-pin D stands at the extreme
lower end of the slot K, in which it works, at the same time the crank-pin C,
stands at the extreme upper end of the slot in which it works, so that in this
position there is a positive engagement between the crank and the arm F, in both
directions, so that the arm F, will be practically held firm, that is, will be forced
to its down position by the pin D, and prevented from passing beyond that position
'by the pin C.
Starting from this point Figure 1, the shaft A, with its crank B, revolves in the
direction indicated by the arrow, the crank-pin C, working against the end of its
slot most distant from the pin G, of the arm F, will draw the arm F with the
crank, as indicated in Fig. 2, at the same time the pin D, has moved from the end
of the slot nearest the pin G, and is approaching the other extreme its slot K.
'The position Figure 2, is substantially midway between the two extremes of
movement of the arm F.
The crank B, continues its revolution as indicated in Figure 3, until the centers
of the pin G, the shaft A, and of the crank-pins CD again come into line but
with the pins CD upon the opposite side of the shaft A, and as seen in Fig. 3,
at this point the pin D has reached the outward extreme of its slot, while the.
pin C, still remains in the same position in relation to its slot in which it started,
and this is the extreme up position of the arm F.
As the shaft A, and crank continues the revolution from the position seen in
Figure 3, if the arm F, be held firm, the pins. C D of the crank will carry the
links over with them, but the pins CD, approach the pin G, and recede from the
extreme outer end of their respective slots, and as seen in Fig. 4, this movement
of the pins CD continuing, the pin D first reaches the extreme inner end of its
slot, and until that point is reached, neither of the crank-pins C D have any
.effect upon the arm F, but after the pin D, comes into engagement with the inner
end of its slot, as seen in Fig. 4 then the power of the revolving crank will be
communicated to the arm through its link J, to the arm F, to commence a return
swinging movement of the said arm F.
To hold the arm F, firmly during the time in which the crank pins are passing
from the extreme outer end of the slot, so as to obtain a bearing upon the, inner
end of one of the slots, a segment L, is made fast to the arm F, the outer surface
..of which is concentric to the shaft A, when the arm is in the up position, as seen in
Fig. 3. The crank B, is constructed with a projection M, from which a pin or
friction-roll N, projects towards the links, the distance of the pin or roll N, from
the shaft A, corresponds to the outer surface of the segments L, when the arm
is in the up position, and as seen in Fig. 3, and the length of the segment L, is
such that as the arm reaches its extreme up position, as seen in Fig. 3, the pin N,
in the rotation of the shaft A, will have just reached the upper end of the
segment L, and continuing, will pass onto that segment, until the point when the
crank-pins again commence their action upon the arm F, is reached, and as seen in
Fig. 4, at this point the pin N, escapes from the segment L.
As the surface of the segment corresponds to the path of the inner surface of
the pin N, that pin takes a bearing upon the face of the segment, and rides upon

page_text: that surface, thus holding the arm F, firmly in the up position from the time the
pin passes onto the segment as seen in Fig. 3, until it escapes therefrom, as seen
in Fig. 4.
The pin N, having escaped from the segment, as seen in Fig. 4, the continued
revolution of the shaft A, through the pin D, imparts the downward movement to
the arm F, until the extreme down position is reached, as seen in Fig. 4, at which
time the outer end of the slot I of the connecting-rod H, will have come into
engagement with the pin C, and as seen in Fig. 1, and so that when that point is
reached, the upward movement of the arm F, will immediately commence.
The shaft A, making successive revolutions will impart a corresponding vibratory
movement to the arm F, and consequent oscillatory movement to the shaft E, but
because of the lost motion between the crank of the shaft A, and the arm F, the
arm F, will remain inactive during a portion of the revolution of the shaft A,
corresponding to the extent of the said lost motion, thus making the oscillatory
movement of the shaft E, intermittent.
.
To illustrate the advantage of this dwell or rest in the oscillation of the
shaft E, suppose it to be applied to impart the vertical reciprocating movement
to the slide of a power-press, the dwell or rest occurs when the press slide is in its
up position, thus giving time for the introduction or removal of work from below
the slide, the slide descending to do its work, and immediately returning as, if by
the continuous movement of the crank.
As another illustration, power-shears; in which the blades are brought together
by the downward movement, aud on the rise will rest for a time for the introduction
of the new work.
Another illustration, as a feeding device for various machines where an inter-
mittent feed is required, the feed will be produced by the oscillation of the
shaft E, and during the time of rest of that shaft, the work will be performed
upon the material fed.
These illustrations will be sufficient to enable persons skilled in the art to which
this invention pertains to apply it to the various purposes for which it is adapted.
By making the slots of the two connecting-rods longer or shorter, the time of
rest will be varied accordingly.
The employment of the segment as a means for holding the shaft E, during its
time of rest, is desirable but not essential to the invention, as the friction or
resistance to the movement of the shaft may be sufficient to retain it in its position,
from the time it reaches its up position until the crank-pins again come into action
to return the shaft.
We have used the terms "upward and downward," as illustrating the operation
of the machine, but not to confine the invention to any particular direction of
operation, as it will be evident that this movement may be applied to operate in
any desired direction and for many purposes, circumstances alone governing the
best or most desirable position in which the parts are to be relatively arranged.
It will be understood that the shaft A, while practically a continuously revolving
shaft, will be subject to engagement or disengagement of the power as occasion
may require, as for illustration, in a power-punching-press, which operates pro-
ducing successive punchings so long as the shaft revolves, but the shaft is adapted
to be stopped by the operator at any time, even between each operation, if so
disposed, or required.
It will also be evident that the slot or lost motion of the connecting-rods may
be made on the crank-pin G, of the arm F, instead of upon their respective crank-
pins C D, if preferred, as illustrated in Fig. 7, and accomplish substantially the
same result.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondents I declare that what I claim is :-
First. The combination of a revolving shaft carrying a crank, having two

page_text: crank-pins in the same radial line, but one more distant from the center of motion
than the other, an oscillating shaft, an arm projecting radially from said oscillatory
shaft, and carrying a projecting crank-pin, two connecting-rods arranged on the
crank-pin of the said oscillating-shaft, the said connecting-rods joined respectively
to the two crank-pins of the revolving shaft, the said connecting-rods constructed
for a predetermined length of lost motion between the crank-pin of the oscillating
shaft and the two crank-pins of the revolving-shaft, substantially as and for the
purpose described.
Second. The combination of a revolving-shaft carrying a crank having two
crank pins in the same radial line, but one more distant from the center of motion
than the other, an oscillating shaft, an arm projecting radially from said oscillatory
shaft, and carrying a projecting crank-pin, two connecting-rods arranged on the
crank-pin of the said oscillating-shaft, the said connecting-rods joined respectively
to the two crank-pins of the revolving shaft, the said connecting-rods constructed
for a predetermined length of lost motion between the crank-pin of the oscillating-
shaft and the two crank-pins of the revolving-shaft, the arm of the oscillating-shaft
constructed with a segment concentric with the axis of the driving-shaft as the said
arm of the oscillating-shaft stands in its nearest position to the said revolving-shaft,
the length of the said segments corresponding to the time of the said lost motion,
and the revolving shaft provided with a projecting pin corresponding to the outer
surface of said segment, and in the position relative to said segments, substantially
as and for the purpose described.
.
CT
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.