Improvements in Mechanism for Obtaining Vibratory, Reciprocating, and Seismic Motions.
Year: 1892

page_text: Date of Application, 26th May, 1892
Complete Specification Left, 27th Feb., 1893-Accepted, 20th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in Mechanism for Obtaining Vibratory, Reciprocating,
and Seismic Motions.
זיין
I WILLIAM WORBY BEAUMONT of 100 Palace Road Tulse Hill London Civil
Engineer do hereby declare the nature of this invention to be as follows:-
To obtain vibratory, reciprocating, seismic or gyratory motion, generally of small
range I attach, directly or indirectly, to that which has to be so set in motion, a
rotating element piece or pieces, such as spindles wheels discs cranks or a
combination of these with their bearings, whose centre of rotation is not coincident
with their centre of mass figure or gravity the departure from such coincidence being
dependent upon the relation between the weight of the thing to be set in motion, the
unbalanced weight of the rotating element, between the respective velocities, the
range of the required movement and its nature as for instance vibratory as of a
tuning fork, reciprocating or synchronous pendulous movement.
The method of imparting rotary movement to the rotating thing, element or
mechanism depends upon the application whether to sieves, feed hoppers, thrashing
machine parts, textile machinery, chocolate moulds, sorting & sizing jigs, tools or
other such mechanism machinery or apparatus.
In some cases it may be driven by ordinary leather belts india rubber belts
flexible shafts, wire in torsion or cord, rope chain or other connections, and by
electrical or other motors. The velocity of rotation may be variable and the centre
of gravity or the excentricity of the rotating thing or mechanism or vibrator may
be adjustable by varying the position of the centre of rotation or the relative
position of the parts & the' variation may be made automatic to suit or correct
variation of the speed of the driving power or motor. In a modification the motion
is obtained by an excentric motor pulley and a spring or equivalent.
Dated this 21st day of May 1892
W. WORBY BEAUMONT.
COMPLETE
SPECIFICATION.
Improvements in Mechanism for Obtaining Vibratory, Reciprocating,
and Seismic Motions.
I WILLIAM WORBY BEAUMONT of 100 Palace Road Tulse Hill London Civil
Engineer 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:―
To obtain vibratory reciprocating gyratory or seismic motion generally of small
range I attach directly or indirectly to that which has to be so set in motion, a
rotating element, piece or pieces such as spindles, wheels, discs, cranks, or
combination of these with their bearings, whose centre of rotation is not coincident
with their centre of mass, figure or gravity, the departure from such coincidence
being dependent upon the relation between the weight of the thing to be set in
motion, the unbalanced weight of the rotating element, between the respective
velocities, the range of the required movement and its nature..
The method of imparting rotary movement to the rotating thing, element, or
mechanism, depends upon the application, whether to sieves, feed hoppers, thrashing
machine parts, textile machinery, chocolate moulds, sorting and sizing jigs, purifiers,
scalpers, tools, or other mechanism machinery or apparatus. In some cases it may
be driven by ordinary leather or indiarubber belts, by flexible shafts, by a wire or
wire rope or chain or cord or either of these in torsion or by other connections.

page_text: '
The velocity of rotation may be variable and the centre of gravity or the excentricity
of the rotating thing or mechanism or vibrator, may be adjustable by varying the
position of the centre of rotation or the relative position of the parts, & the
variation may be made automatic to suit or correct variation of the speed of
the driving power or motor.
In a modification the motion is obtained by an excentric pulley and a spring or
equivalent.
By means of this invention I bring into beneficial use that which has hitherto
been a disadvantageous and detrimental cause of vibration or vibratory movement
in the frames or other parts of machinery or the floors & foundations upon which
they rest or are attached. At the same time my invention enables me to avoid the
harmful vibration referred to in such frames or floors and to confine required
reciprocative shaking, seismic vibratory or gyratory action or motion to the parts
to which it is desired to impart such action or motion. By so confining such
vibration or motion I avoid the wear or loosening and destruction of framing and
other fixed or nominally stationary parts, and the work which is now expended upon
such detrimental action is saved by my invention and only that power which is
necessary to impart the vibration or movement is used.
Hitherto the motion required for the operation of sieves of various kinds, jiggers,
shakers, & the like, has been communicated by connections with cranks, cams or
excentrics of various forms, which are supported by bearings fixed on the framing
of the machine containing the sieve, jigger or such like part, or to such other fixed
part as may be convenient. By the employment of these means, the force necessary
to impart a push or a pull to the sieve or the like is equally and oppositely imposed
upon and resisted by the cranks, cams or such parts & the bearings which carry
them & thereby that to which the bearings are fixed.
Repetition of the forces and resistances so brought into play gives rise to the
detrimental actions and results referred to, and moreover greatly increases the cost
of some machines and apparatus in which high speed reciprocating, vibratory or
gyratory action or shaking is employed, because the necessity for opposing the
transmission of the vibration to framing or carrying parts, involves construction of
heavier & stronger framing than would otherwise be necessary, and because the
cranks and connections of such high speed apparatus must be strong & accurately
balanced.
All these detrimental causes and effects I avoid by attaching in most forms of
my invention the whole of that apparatus by which I cause the required vibrating,
shaking, reciprocating or gyratory action, to the thing to which such motion is to
be imparted.
I attach or connect to the sieve, jigger or such like apparatus, a simple rotating
device which is or contains as an essential or part which is or becomes more or less
excentric to its axis of rotation and is thus an unbalanced rotating mass, piece or
part which in endeavouring to find an axis of rotation coincident with its mass axis
if freely suspended and rotating gives motion to the sieve or other thing to which
it is attached, the range of the movement depending on the amount of the departure
of the path of the unbalanced rotating mass from its centre of inertia, upon the
speed of its rotation, upon the weight of the unbalanced mass and of the sieve or
other thing to which it is attached, upon the mode of suspension or other support of
the sieve or such thing, upon the length of the suspenders and their character and
upon the position of the plane of the axis of the rotating piece in relation to the
plane of the vibratory or reciprocating movement given by it to the thing to which
it is attached.
In the drawings hereunto attached various typical forms of apparatus suitable
for carrying my invention into effect are shown as examples but it will be obvious
that the method of carrying my invention into effect being now described &
ascertained, a person of ordinary intelligence accustomed to mechanism will be able
to devise other forms of apparatus suitable for this purpose and to meet require-
ments not herein specifically mentioned.

page_text: Fig. 1 represents the side view of a sieve and Fig. 2 a transverse section of the
same. A A are the sides of the sieve frame, S the sieve silk, gauze or other
material & B, B' top & bottom cross bars connecting the side pieces A and
forming the means of supporting a central spindle C which runs within a bearing D.
The lower end or arm C of the spindle C, is approximately at a right angle with
the part which runs within the bearing D and it carries a weight W adjustable as
to distance from the centre of the spindle C. The upper part of this spindle is
provided with a nut E which has an upward projection to which may be connected
a rod F or by modification of the form of E a wire rope or chain or other flexible
means of communicating rotary movement by means of torsion may be attached to
the said spindle C. The spindle C & bearing D & the various connected parts
are shown in detail in Figs. 3 & 4. For giving rotary movement to the rod or
other flexible connecting piece F, one suitable form of spindle, driving pulley and
bearing is shown at Fig. 5 & a similar one at Fig. 6, the spindle G in this case
being formed with a taper screw end and provided with a taper nut by means of
which the rod F or a wire rope may be gripped after the manner of the commonly
known drill chuck. The bracket H is attached to a suitable part of the framing of
the machine carrying the sieve to which motion is to be communicated, & the
spindle G which it carries receives motion by a belt on the pulley J. By this
means the spindle C connected to the sieve is rotated at the speed of the spindle G
and the connecting piece F. This is shown at Figs. 7 & 8 which are diagram
representations of the application of similar apparatus to four sieves A, A, A, A, -
in one frame & in this case one pulley communicates motion to the four spindles
with their revolving weights W. The weight W, Figs. 1, 2, 3 etc. is thus caused
to revolve on the arm C³, connected to the spindle C & at such a distance from the
centre of the spindle C as to cause it as an unbalanced rotating mass to endeavour
with considerable force to assume an axis of rotation coincident with that of the
whole of the revolving parts if they were freely suspended & rotated. Being
unable to cause the spindle C to depart from its position within its bearing fixed to
the sieve it gives rise to a gyratory movement of the sieve A, Figs. 1, & 2, assumed
to be suspended in the manner common with scalper & other sieves. It will be
seen that the bracket H is a fixture while the bearing D & spindle C which are
attached to the sieve are free to move and partake of the motion imparted to the
sieve. The connection between the bracket H is only the light flexible connection F
of sufficient torsional strength to rotate the weight W and thus cannot communicate
vibratory motion to the framing to which H is attached or to which the sieve is
suspended except such as may be transmitted through a free suspender. The
weight W may be adjusted as to position on the arm C₁, so as to suit the movement
it is desired to give to the sieve and to suit other conditions as for instance weight
of sieve & speed of rotation of the weight with its spindle. These adjustments will
be obvious to the user and according to the purpose of the application. The
rotating spindle C & the excentric or unbalanced weight W in the forms shown at
Figs. 1, 2, 3, 4 and in the other forms shown at Figs. 7 to 20 will hereafter be
called the vibrator.
A vibrator may be attached to the centre of a sieve after the manner shown at
Figs. 1 and 2 or at the end of a sieve as shown at Figs. 7 & 8 and the vibrator may
take the form shown in Figs. 1, 2, 3, & 4, or in Figs. 9 and 10 & 11.
In Figs. 3,
10 and 11 the bearing D is shown as fixed by means of bolts & nuts but it may be
fixed as shown in Figs. 5 and 9 in which case the end of the bearing D is screwed
& carries nuts N by means of which the bearing is fixed to the framework of the
sieve. As shown in Fig. 9 the bearing D is a plain tube dropped through a hole
in the framework of the sieve and held there by the nut N. In each of these forms
the weight W on the arm C¹ may be replaced by a weight on the end of the spindle
of either of the forms shown at Figs. 14 to 18 & as shown in application in the
diagram representations Figs. 12 & 13 and at the end L of Fig. 7. In these cases
the vibrator weight is shown as running upon a horizontal spindle driven by the
flexible connection F and a driving pulley & spindle similar to that shown in

page_text: Figs. 56 but placed horizontally as shown in Figs. 7 & 12 where the pulley J is
driven by belts M from the pulleys P on the ends of the shaft Q which receives
motion from any usual source of power. In Fig. 14 the end of the flexible
connection F is shown as gripped by a pinching nut on the end of the spindle which
carries the weight W, but the end of the spindle & the connection for F may
take the forms shown in Figs. 16 or 17. The vibrator weight W is shown of
different forms in Figs. 14, 15, 154, 17, & 18, Figs. 14 & 15 showing one form
of weight adjustable as to distance of the greater part of its weight from the centre
of the spindle C which carries it. An end view of a set of 4 sieves, operated by the
horizontal form of vibrator is shown in the diagram illustration Fig. 12 & at the
end L of Fig. 7 the sieves A in each case being assumed to be suspended by one of
the known suitable forms of suspender not necessarily either of the forms shown in
Fig. 19. The sieves are shown as if level but in most cases it will be necessary to
give more or less inclination longitudinally and in some cases transversely to the
sieves more especially when the gyratory movement given by the vibrator or
vertical spindle is adopted. When the horizontal vibrator is employed the inertia
of motion of the rotating weight W only imparts to the sieve in most cases a
horizontal to & fro motion and it is usually necessary to use only as much weight.
and speed of rotation as is insufficient to cause this inertia of motion to overcome
the inertia in a vertical sense of the sieve otherwise the sieve will be jerked through
a small range upwards with most forms of suspenders and this jerking would not
always be desirable, on the other hand the horizontal form of vibrator similarly
imposes during the upward part of its rotary path a downward stress upon its
suspenders or supports. The effect of this downward stress or of the upward stress
is not necessarily harmful & may be usefully employed by suspending or carrying
the sieves upon or through the medium of india-rubber or steel spring cushions
after the manner of the use of such india rubber cushions or buffers common in
supporting scalper & other sieves. In some cases it may be useful to arrange for
a definite and usually very small amount of vertical free movement say an eighth
of an inch uncontrolled or prevented by such springs, buffers or cushions.
Where it is advantageous to give sieves a knock as is sometimes done by
automatic knockers, the reciprocating vibratory or gyratory movement of the
sieve as caused by either form of the vibrator may be purposely somewhat
restricted. For instance in the case of the sieves A shown in Figs. 7 and 8 as
operated by the vertical vibrator, the distance between the sides of the sieve, and
the vertical members Y of the framework of the machine or pieces attached thereto
may be less than the transverse movement which would otherwise be set up by the
vibrator, the sieve would thus knock against the frame or piece attached thereto
once or twice for each revolution of the vibrator according to whether its motion
is restricted on one or both sides.
In the diagram illustrations Figs. 13 & 19 the vibrator is shown as of somewhat
different form with regard to the mode of carrying it and of driving it, only
a longitudinal reciprocation is supposed to be given to the sieve A and the pulley J
is attached to the vibrator spindle & driven direct by a belt M¹ from a pulley Pon
a shaft driven in the ordinary way. In this case the belt M' imparts to the
necessary speed and itself participates in the backward & forward movement given to
A by the vibrator. In diagram Fig. 20 is shown another form of vibrator suitable
for some purposes. In this case a piece of chain or wire rope is suspended between
two bearings D on the sieve frame & a weight W carried in the centre thereof.
The chain or preferably a rope is rotated by one or other of the means already
described and the weight W thus caused to describe a circular path of greater or
less diameter according to the versed sine given to the rope. If a chain be used it
may be necessary to mount one end of it a little out of centre of one of the
spindles carrying it. Fig. 21 is a diagram representing an application of a vibrator
at J for the vibration of an elastic bar or spring board % assumed to be fixed
rigidly at the end X, the vibrator being driven by the pulley P & belt M, sets up
a vibration in the direction indicated by the arrows & this vibration may be

page_text: employed for imparting to trays carrying chocolate moulds & for other similar
purposes where a vibration of greater or less range or a high speed vibration of
small range is required. In Figs. 3 & 4 the spindle C of the vibrator is shown as
of tubular form and open at the top but plugged with a piece T at the lower
end. The tube may be filled with oil or other suitable lubricant; holes O, O being
provided for the emission of the oil to the bearing surfaces. The spindle G of the
rotator shown in Fig. 5 or 6 is provided with a lubricator U the spindles being
provided with suitable holes or passages to enable the lubricant to reach the
bearings.
Fig. 22 is a diagram illustration of a method of imparting to a sieve shaker or
the like a reciprocating or shaking motion. A is a sieve or the like, P a pulley or
toothed wheel on a spindle having fixed bearings but adjustable as to distance from
an excentric pulley or pinion on a spindle in bearings attached to A or that to
which motion is to be given. S is a spring for pulling the sieve or the like in the
direction of the arrow, the motion in the reverse direction being obtained by the
operation of the leather or other belt or chain belt in running on the pulley or
wheel P and the excentric pulley or pinion p, the amount of the excentricity being
equal to the range of the motion to be given to A. Instead of the spring S the
sieve A may be carried by spring hangers arranged to push in the direction of the
arrow, or, when the speed of reciprocation is not great, by hangers which are
inclined at their upper ends in the direction of the arrow so as to exert a pull in
that direction.
Having now particularly described & ascertained the nature of my said inven-
tion & in what manner the same is to be performed, I declare that what I
claim is :-
1. Imparting or giving rise to gyrating, vibrating reciprocating or shaking
motion to and for the operation of sieves, sorting separating and dressing apparatus,
moulds, filling tables, and the like by means of an unbalanced rotating spindle &
weight attached to the thing which is to be gyrated, vibrated, reciprocated or
shaken substantially as herein described and typically shown.
2. Imparting or giving rise to a gyrating, vibrating, reciprocating or shaking
motion to and for the operation of sieves and other apparatus by means of a
rotating spindle & unbalanced weight to which rotation is communicated through
the medium of a flexible rope, wire, jointed rod or spindle chain or the like in
torsion by means of a rotating spindle running in stationary bearings substantially
as described & as typically shown.
3. Imparting a reciprocating or vibratory motion to sieves, shakers or the like
by means of a belt or chain running on a driving wheel or pulley upon a spindle
with fixed bearings and on an excentric pulley or pinion on a spindle with bearings
attached to the thing which is to be put into motion substantially as herein
described with reference to Fig. 22.
Dated this 25th day of February 1893.
W. WORBY BEAUMONT.