Improvements in in or relating to Scale Weighing Machines for Delivering Predetermined Quantities of Substance from Bulk.
Year: 1896

page_text: Date of Application, 21st Jan., 1896
Complete Specification Left, 30th May, 1896-Accepted, 19th Dec., 1896
Improvements in
in or relating to Scale Weighing Machines for
Delivering Predetermined Quantities of Substance from Bulk.
I, FRANK WILLIAM BENTALL, The Hollies Castle Headingham Essex,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in or relating to scale weighing machines
for delivering predetermined quantities of substance from bulk and consists in an
improved means of closing the feed shutters for regulating and stopping the supply
of substance to the scale pan when the required amount of substance has entered
same and is carried out as follows: Attached to the scale pan or lever carrying
same is a hinged rod or bar having projections on same.
This. bar passes between two pivoted rollers, the distance between which is
regulated by a spring, and screw pin connected to one of the roller supports which
is movably attached to a support.
The shutters closing the delivery shoots are operated by pivoted levers, the ends
of which are operated by the bar having the projections as when a certain amount
of substance has entered the scale pan a projection on the said bar will come into
contact with each roller and owing to the said rollers rotating in opposite directions
& being geared together the bar. will be drawn between same a certain distance
thus shutting the main delivery through one of the levers aforesaid being
operated by the end of the bar. Upon the further descent of the scale pan another
projection will come into contact with each roller and being again drawn between
will cause the final delivery shoot to be closed by the end of the bar coming into
contact with another lever which closes the final delivery shoot. The weights are
so arranged that in the case of a pound of substance (avordupoise) being weighted
15 ounces are first delivered and then the 1 ounce weight acts upon the scale until
the final delivery is effected.
Improvements in or relating to Scale Weighing Machines for
Delivering Predetermined Quantities of Substance from Bulk.
I, FRANK WILLIAM BENTALL The Hollies Castle Headingham Essex
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:-
This invention relates to improvements in or relating to scale weighing machines
for delivering predetermined quantities of substance from bulk and consists in an

page_text: improved means of closing the feed shutters for regulating and stopping the supply
of substance to the scale pan when the required amount of substance has entered
same and is carried out as follows:-Attached to the scale pan or lever carrying
same is a hinged rod or bar having projections on same.
This bar passes between two pivotted rollers the distance between which is
regulated by a spring and screw pin connected to one of the roller supports which
is movably attached to a support.
The shutters closing the delivery shoot are operated by pivotted levers the ends
of which are operated by the bar having the projections as when a certain amount
of substance has entered the scale pan a projection on the said bar will come into
contact with éach roller and owing to the said rollers rotating in opposite directions
and being geared together the bar will be drawn between same a certain distance
thus shutting or partially closing the main delivery through one of the levers
aforesaid being operated by the end of the bar. Upon the further descent of the
scale pan another projection will come into contact with each roller and being again
drawn between will caure the final delivery shoot to be closed by the end or
projection on the bar coming into contact with another lever which closes the final
delivery shoot. The weights are so arranged that in the case of a pound of substance
(avoirdupois) being weighted, 15 ounces are first delivered and then the 1 ounce
weight acts upon the scale. pan until the final delivery is effected.
Referring to the accompanying drawings:-
Figure 1, is a side elevation of my invention.
Figure 2, end elevation of same.
Figure 3, enlarged view showing end view of feed rollers & shutters.
Figure 4 enlarged view of rotating rollers.
Fig. 5, front elevation of lower part of bar 8.
Fig. 6 plan view of mechanism for releasing feeding roller from driving shaft.
Referring to the annexed drawings Figures 1 and 2, a, is the scale pan into
which the substance falls or is delivered from the hopper, b. c, is a rotating roll
which is carried upon the spindle or driving shaft, d, & may be caused to rotate
therewith or run free upon same as required, which is driven by means of the
pulley, e, by means of a belt which is driven by suitable power., and, g, are
pulleys running loosely upon the spindle or driving shaft, d, and being caused to
rotate by means of the sliding clutch, h, having a projection or projections, i, upon
each side of same so that either pulley wheel may be caused to rotate by engaging
with the sliding clutch which is movably keyed upon the shaft or spindle, d, so as
to engage either of the pulleys, f, and, g, other projections i entering apertures in
either pulley which are carried by the spindle, d. This spindle drives the roller, e,
and through the medium of the band or cord, j, drives the roller 7 (Fig. 4).
The roller 6 is carried in a moveable bearing 10 hinged or pivotted at 11. 19 is
a pin or rod attached to said bearing 10 the screwed end 21 of which passes through
the support 22, 23 being a nut or thumb screw which engages on same. 24 is a
spring of a suitable form such as a spiral spring so as to cause the rollers 6
and 7 to move the indented rod, or bar 8 which acts upon scale pan a and
after the rod 8 has descended a certain distance the indentations, p, prevent the
further descent of the scale pan until the desired amount of substance has
entered same when the shoulders 25 coming into contact with the wheels or
rollers 6 and 7 which are rotating causes the rod to descend until the indentations 26
come between the rollers 6 and 7.
The shutter or flap 27 and 28, namely 27 which controls the main feed is
carried upon the lever or rod 13, which has suitable bearings 29. 28 is the shutter
or flap which controls the fine feed and is carried upon the spindle 15, 31 and 32,
Fig. 3, are two levers secured to the spindles 13 and 15" and connected together
by the lever or rod 14 which is pivotally attached at 33, and 34, to the levers 31,
and 32, so that the movement of the spindle 13, through the medium of the levers
and connecting rod 14, (operated by the mechanism) will operate the shutter or
flap 28 controlling the fine feed, so that the coarse feed shutter or flap 27 is first

page_text: partially closed by means of the lever 17 & counterpoise 16 which is supported by
projection 17 Figure 2 and the fine feed shutter or flap 28 is closed upon the continued
downward movement of the scale pan, a, in which the substance is weighed. 9 is
a rod which is attached to the weight end of the scale 9 and which carries a
weight and terminates in a forked or engaging end 35 which will lift a weight or
counterpoise 36 of a weight which will, when lifted, make up the weight required.
For instance, if 15 ounces is placed in the weight end 9 of the scale, then 1 ounce
will be the weight of the counterpoise 36 so that after the first delivery of 15 ounces
has taken place; the final delivery of 1 ounce will close the fine delivery flap 28,
owing to the descent of the scale pan, a, containing the substance which causes the
weight end of same to be acted upon by the one ounce weight which is raised when
the scale pan descends beyond the distance which is regulated by the 15 ounce
weight, thus giving 16 ounces as the final delivery; the 1 ounce weight being
raised from the support 38 by means of the forked end 35, attached to the rod 9.
9, is a lever or sliding rod which has projections 27' which engage in the
grooves 22, in the clutch piece, h, and, ', so that the movement of the scale pan, a,
causes the end of the lever 8 to operate the pivotted lever, u, which allows the
arm, to, to move in the direction of the arrow thus allowing the arm, y, to fall which
carries the weight, 2. This arm is connected by means of the bar or rod y' to the
lever 1 pivotted at 2, and which carries the prolongation 4, which engages on the
stop 5 on the rod, g', which slides in suitable bearings and is operated by the lever 12
pivotted to rod, p', and engages or holds the pivotted lever, y', also carrying a
weight 2. w is a lever which is attached at the point, a, to the rod pl so that the
shoulder, a, comes into contact with the end, 3, of the lever, u', Fig. 1. and thus
allows the weighted end of the lever or arm, y', to remove the clutch from the ends
of the pulleys, through the medium of the lever 12. The arm or lever, 12, being
attached to and operating the lever, q', through the medium of the pin, r, attached
to the bar, q', and working in the slot, q, in the lever, 12. n, is a spindle or rod
which carries the pulleys, l, and, m, which are driven by the bands or cords, k,
and, j, and the said spindle operates one of the rollers, which are geared together
by means of the toothed wheels 7" and 6°.
The movement of the lever u causes the feed to be reduced owing to the descent
of the rod 8, thus allowing the lever y having the weight or counterpoise 2, to move
in the direction of the arrow 2, 41 being a projection, or stop piece upon the lever u
upon which the said lever u bears. 3 is a projection or handle for operating the
lever 1 in order that the rod or bar, q', may be moved in the direction of the
arrow 2 and the projections, i, engage in the apertures in the pulley, f, which is
connected to the pulley, 1, by means of a crossed band or belt, k. By this means
the directions of motion may be readily reversed, so as to return the apparatus to
its initial position after desired amount of substance has entered the scale pan.
By operating the handle 3 the rod or bar, g', is caused to slide so that the
clutch, h, is caused to engage with the pulley wheel, f, through the medium of
prolongation 4 & movable stop piece 5 thus reversing the motion of the spindle, n,
owing to the baud, k, being crossed and so bringing the scale and mechanism to the
starting position, the reversing of the direction of motion of the rollers 6 and 7
causing the rod 8 to be raised so as to bring the scale pan, a, back to its initial
position after the substance has been removed from same. e, and, el, are fast and
Joose pulleys respectively upon the spindle, d. It will be seen that the feed
roller, c, when released from the clutch, 4', will not revolve as it is free upon the
shaft or spindle unless when engaged by the clutch, h', b, is the hopper containing
the substance to be weighed such as tea, sugar or the like which falls upon roller, c,
which when rotating delivers same into the scale pan, a, through the flaps or
shutters, 27 and 28.
The rotating rollers 6 and 7 may if desired be provided with flexible surfaces
such as a coating or covering of india-rubber so as to ensure the gripping of the
shoulders or projections 25, on the rod or bar 8 attached to the scale pan a, or
rod 9" which carries same.

page_text: The mode of operation is as follows. The substance to be weighed is delivered
or fed from the hopper & iuto scale pan a which is counterbalanced by weight 9
& 36 (as before described) so that when the weight 9 is overcome the scale pan a
descends carrying with it the bar 8 the bottom end of which is shaped as shown in
Fig. 5, the part 30, depressing the pivoted lever u, the end 41 of which engages
with the bottom end of lever w; which is thus allowed to move in the direction of
the arrow the bottom end travelling in a groove in the lever -under the
influence of weight to which it is connected by means of lever y & pivoting
rod, 31; attached or pivoted to the lever y is a bar y², also pivoted to arm 1. this
bar y carries a support 17ª upon which rests the weighted lever 17 which is
pivoted to the spindle 13 carrying the coarse feed shutter 27 thus as the bar y
falls it will allow the weighted lever 17 to fall thus revolving the spindle 13 carrying
the shutters 27 & 28 thus diminishing the amount of feed. Upon the continued
downward movement of the scale pan a the lever u is further depressed, thus
allowing the weighted lever 17 to descend still further & close the shutter 28
which controlls the fine feed being connected to the spindle 13 carrying weighted
lever 17 by means of arms 31-32 & connecting rod 14. While the latter
operation is taking place the part 30 depresses a lever u which engages with a
lever w which is operated upon in a similar manner as the lever u by a similar
weight which also operates the lever 12. connected to the sliding bar g' &
causes same to move in the direction of the arrow 2 this bar g¹ is connected by
projection 27 to the sliding cluthes & & &' having projections i which are keyed to
the driving shaft d so that when the sliding bar g' is moved in the direction of the
arrow 2 the sliding clutches A & A are disengaged from the feeding roller &
pulley g respectively which cease to revolve not being keyed to driving shaft d.
and gare two pulleys running loosely on shaft d & are in connection with the
pulley & m respectively carried upon spindle n which also carries the roller 7
Fig. 4. & spur wheel 7, which gears with a corresponding spur wheel 6 which
operates a second roller 6; depending between these rollers 6 & 7 is the bar 8
connected to the scale pan; after the rod 8 has descended a certain distance
regulated by the weight 9, the rollers 6 & 7 enter the indentations p. thus
preventing the further descent of the scale pan until the final amount of substance
bas entered same, causing a further descent when the shoulders 25, coming into
contact with the rollers 6 & 7 which are rotating, cause the rod to descend until
the indentations 26, come between the rollers 6 & 7. To bring the scale &
mechanism to its starting position, the lever I is allowed to descend (by the descent
of the bar y) & operates the prolongation 4 which, coming into contact with the
stop 5, causes the rod q¹ to move still further in the direction of the arrow 2",
which causes the sliding clutch to engage with the pulley thus reversing the
motion of the rollers 6 & 7 & allowing the upward motion of the rod 8,-after the
contents of the scale pan a, has been removed-by any suitable means, such as by
hand, by reason of the connecting band k, being crossed; then upon depressing
the handle 3 by hand power the prolongation 4 coming into contact with the
stop 5, will return the bar q' to its initial position & cause the clutches & h' to
engage with the pulleys & roller c respectively, & at same time raising the
weights which cause the levers u & u' to again assume the position of rest.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combined construction and arrangement of the various parts substantially
as described and illustrated herein.
2. In scale weighing machines a scale pan having a rod or bar provided with
projections or shoulders which lowers the scale pan containing the substance to be
weighed owing to the action of two rotating rollers between which the said bar or
rod passes when the projections or shoulders come into contact with said rotating
rollers, owing to the descent of the scale pan containing the substance, a rud

page_text: having an end which engages with a weight which is raised after the scale pan has
descended a certain distance, said rod being attached to the weight pan of the
scale; a spindle carrying pulleys and clutches, a feed roller upon said spindle
which passes or delivers the substance from the hopper, two flaps operated by
levers which are moved by the end of the bar having the shoulders or projections
substantially as described and illustrated.
D
3000
E. EATON,
Agent for Applicant.