US1540997A - Automatical balance - Google Patents

Description

June 9, 1 925.

P. A. NORDLING AUTOMATICAL BALANCE Filed Oct. 5, 1925 s Sheets-Sheet 1 June 9, 1925. 1,540,997

' P. A. NORDLING AUTOMATICAL BALANCE Filed Oct. 5, 1923 3 Sheets-Sheet 2 /AWW Jun-9,1925. 1,540,997

P. A. NORDLING AUTOMATICAL BALANCE Filed 00 .1925 5 Sheets-Sheet 5 l05 ISO Patented June 9, 1925 PETER AUGUST NORDLING, or sameness, swnnm't,

T allgwhom it Be it known- LINo, a subject AUTomA'rIcAL mace.

filicltioh filed October 3, 1923. Serial No. 686,400.

may concern that 1, PETER AUGUST Nonnof the King of Sweden, re-

siding! at Gottenborg, in the county of Goth- 6 enborgand Bohus, Kingdom of Sweden,

have invented certain new and useful Improvements in Automatical Balances; and

I do hereby declare thatthe following is a full, clear, concise and exact description of the; invention,

such as will enable others skilled in the art to which it appertains, to make and use the same. 7 I

The present invention relates to automaticalqbalances of the type wherein the material ,to be weighed is supplied to the bag or the like suspended on the beam of the balance through a feeding device such as a funnel or is controlled by the like, the outlet of which shutters which catch mechanism against the action of springs or weights are held in opened position during the weighing, the said catch mechanism being provided to release the said shutters automatically a? has been filled nd successively when the bag with a certain quantity by weight of the materiaL The invention has for its main object to provide the catch mechanism and the means i for releasing tl the beam that the latter is entirely free from said catch mechanism and releasing'lmeans when the shutters are closed and the bag is filled to the desired weight. 4

This and otl are made clear with reference ings illustrating a balance i nvent-ion.

ie same in such a relation to ier objects of the invention bythe following description to the accompanying drawaccording to the In the drawings 1 Figure 1 is ance; Figure- 2 1s a a side elevation of the balside elevation of thebalance,

partly" in section and viewed from another side than in Figural;

leasing device for one of the shutters,

Figures 3 and 4' show in diflerent opera tive positions,

the catch mechanism and rewhich during the weighing? operation is closed first; 7

- Figures 5 an d 61 are views" corresponding to Figures 3 and 4 and show the catch and releasing mechanism for the shutter which is closed last;

Figure 7 1s a View on an enlarged scale of a detail of the releasing device; and,

Figures 8 and 9 show a braking device for the beam 0 operative positio Referring to the U-i'rons serving t the balance in di flerent drawings, 1 denotes two as a base for the balance and each carrying an upright 2 which may be a tube; These two uprights are rigidly connected with e shaped horizontal members ach other by means of bow- 0' and, 4 respectively, which are mutually connected by vertical members '5.

The upper member {2 isat its ends provided with lugs 6, in which the beam of the balance is" suspended on edges 7 resting on supports 8 fastened to the lugs 6. Said beam comprises a forkshaped member 9, in the shanks 10 of which the' edges are attached, The ends of the shanks 10 are directed downwards and to each of sald ends there is fastened a graduat'ed arm 11, al slidable. From ong which a weight 12 is the middle portion of the fork 9 there projects a graduated arm 13 witha slidable' weight 14, which enables" a careful adjustment of the moment acting upon the beam.

,The shanks 10 carry a socket 18, whichis freely suspended between the shanks by means of edges 17 bearing against supports 20 fastened to the said shanks.

socket 18- there Into the descends a tunnel or the like 22 for the supply of the material to be Weighed; This meal, sugar, powdered fertilizers,

supplied to a pa a bag 28, which material (as, for instance, etc.) is ckage member, I01 instance 18 suspended on the socket 18 as indicated in Figure 1. The outlet of the funnel is controlled by shutters 29: and hinged to the funnel. Said shutters are constructed to be closed automatically and successively when the socket 18 descends, and the' bag: 23 has received the qua tity of material aimed at.-- In the drawings, two

shutters only are visible, but I may use three, other 35 and a one of which 29 is larger than the dapted to be closed first,

thereby covering the main portion of the outlet of the funnel 22. The shutter 29 is acted upon by a spring 31, tending to hold it in closed position, and is, by means of a link 101 connected with a bar 102, which is slidable vertically and guided by a member 105, fastened to the feeding funnel 22. The upper end of the bar 102 is provided with a catch 103 adapted to cooperate with a catch on one arm of an angular lever 106, which is pivotally journaled on the member 105 and actuated by a plate-spring 120 tending to hold the catch of said lever in engage ment with the catch 103 of the bar 102. The other arm of the lever 106 co-acts with one end of a double-armed lever 109, which is pivotally journalled on a pin 108 fastened to a lug 107 on the member 103. In order to enable an angular adjustment of the lever 109 in relation to the member 106, said lever is provided with a device, for instance of the kind shown in Figure 7. This device consists of a circular disc 110, which is fitted in a corresponding recess in the lever 109 and is rotatable about its central axis. The disc 110 is also rotatable about the pin 108, which is disposed eccentric in relation to the axis of the disc. Said disc may be adjusted, for instance, by means of a screw-driver inserted in a notch 111, whereupon it is secured in the position by means of the screw 112. The lever 109 is pivotally connected with a link 113, which in its lower end is provided with a recess 114, the upper edge of which. in the position shown in Figure 3, bears against a pin 115, fastened to a lug 116 which projects from the socket 18. The lever 109 is between its outer end and the link 113 provided with a slidable weight 117 which may be secured in the desired position by means of a screw 171.

Below the lever 109 there is further provided a projection 118 rigidly connected with the funnel and carrying an adjustable abutment 119.

The shutter 35, acted upon by a spring 36, or by a weight or the like tending to hold the shutter in closed position, is controlled by a device of substantially the same design as that above described, with the difference that the adjustable abutment 119 is not rigidly connected to the funnel 22 but instead of that, provided on one arm of a double-armed lever 12S (Figures and 6), which is pivotally journalled on a part 104 projecting from the guiding member 105. The end of the other arm 281 of this lever projects into a recess 129 in the bar 102. The abutment 119 in this construction is resilient in the direction towards the lever 109, for instance by being made in two members 191 and 119, one of which is arranged to telescope within the other. The one member 191 is fastened to the lever 128 and the other member 119 is supported by :1

spring 911. The plate-spring 120 of the former construction is substituted by a spring-actuated adjustable pin 130. The bar 102 of the shutter 35 is also arranged so as to operate a bell 131 in such a manner that the bell is caused to give a signal when the shutter is closed. The remaining parts are the same as shown in Figures 3 and 4, and are indicated by corresponding numeral references.

()n the member 3, there is fastened an oilbrake adapted to prevent too violent movements of the beam when any of its arms is unloaded. The piston rod 16 of this brake is pivotally connected with a loopshaped member 121 embracing the arm 13 of the beam, The upper end of the loop is connected with a cord 123 running over a pulley 122 and carrying a counter-weight 124 of sufficient size to overcome the member 121 and the resistance exerted by the braking device proper. The pulley 122 is rotatably journalled upon an arm 211 rigidly connected to the frame of the balance. The shanks of the loop 121 disposed on opposite sides of the arm 13 are provided with re cesses 125, in which pins or the like 126 fastened to the corresponding sides of the arm are movable upwards and downwards until they reach the upper or lower edges of the recesses 125. The lower edges of these recesses thus will accompany the pins 126 when the arm 13 swings from the starting position to the position or equilibrium. Im-

mediately before the position of equilibrium of the beam, the ascending movement of the loop is checked by means of a stop 127 provided in the cylinder of the brake, whereby, when equilibrium is attained, the pins 126 will move freely .in the recesses 125 and consequently, the loop 121 will not influence the beam (Figures 1 and 9).

The operation of the balance is as follows:

After fastening a bag 23 to the socket 18, the shutters 29, are opened by hand or by any suitable device, whereby the catches 103 of the rods 102 will engage with the catches of the levers 106 and will be secured in opened position, as shown in Figures and 5, against the action of the springs 31 and 36. The material to be weighed now may be supplied to the bag through the funnel and when the weight of the bag and the material contained therein approaches the one on which the slidable weights 12, 11- are placed, the descending material begins to lower that arm of the beam on which the socket 18 is suspended. During this stage of the weighing, the links 113, due to i the power exerted by the weights 117 bear against the pins 115 and accompany the sockets 18 during the descending movement of the latter at the same time swinging the levers 109 about their pins 108. The catch 103 of the bar 102' connected with the shutter 29 (Figures 3' and at) will be first released from the catch of the lever 106, which is swung by the lever 109, as the weightedaetuated' end of the latter is permitted to swing downwards. When the lever 109 has released the lever 106 from the bar 102, the shutter 29 is closed by the spring 81. The further swinging of the lever 109 downwards is prevented by the abutment 110 and consequently, the beam of the balance then will be free from contact with the link 113.

In the moment in which the shutter 29 is closed, the shutter 35 (Figures 5 and 6) is still in opened position, but just before the beam has reached its position of equilibrium, its ratchet bar 102'by the action of the lever 106 will be released and the shutter 35 closed by its spring 36. When the bar 102 in this moment is drawn downwards, the upper edge of the recess 129 will impinge upon the inner end of the lever 128 (Figure 6) whereby the opposite arm of thelever with the abutment 119 is swung upwards so that the said abutment strikes on the lever 109 and swings it back such that the link 113 becomes free from contact with the pin 115. last mentioned devices are adjusted in rela tion to each other in such a manner that the link 113 is free from the pin 115 before the shutter has been entirely closed, whereby the final weighing will take place; after that, the socket 18 is entirely free from the releasing mechanisms.

VVha-t I claim is:

iL In automatieal balances, the combination of a pivotal beam, feeding means for supplying the material to be weighed to a package member carried by said beam, shutters adapted to shut off said feeding means automatically and successively when the package member has'received the desired quantity by weight of the material, a memher connected with the last-closing shutter,

a pivotal catch adapted to engage with said member so as to hold the shutter in opened position, a catch-actuating pivotal lever cooperating with said catch, means acting upon said lever and exerting the necessary power for releasing said catch from said member, means operatively connected to said catchactuating lever and being arranged to bear against the beam of the balance until immediately after that the shutter has been relmised, and means adapted to support said lever after that the shutter has been released.

2. In auton'iatical balances, the combination of a pivotal beam, feeding means for supplying the material to be weighed to a 'iackage member carried by said beam, shutters adapted to shut off said feeding means automatically and successively when the aclrage member has received the desired weight of the material, a ratchet bar con- The nected with the last-closing shutter, a pivotal ei-zt'ch adapted to engage with said bar so as to hold the shutt r in opened position, a catch actuatingliivotal lever cooperating with lever and exerting the necessary power for reiezi'sin said catch from said bar, a link a with said catch-actuating lever and bearing against the beam when the lat ter is not in the position of equilibrium, and an a utment adapted to support said lever and link when the beam is in equilibrium.

3. In automatical balances, the combination of a pivotal beam, feeding means for snpplyingg; the, material to be weighed to a package member carried by said beam, shutters adapted to shut off said feeding means automatically and successively when the package member has received the desired quantity by weight of the material, a ratchet l" connected with the last-closing shutter, a pivotal catch adapted to engage with said bar so as to hold the shutter in opened position, a pivotal catch-actuating doubleermed lever cooperating with said catch by its one arm, means acting upon said lever and exerting the necessary power for releasing said catch from said ratchet bar, a link connected with the other arm of said double-armed catch-actuating lever and hear ing against the beam when the latter is not in equilibrium, and an abutment adapted to support said lever and link when the beam is in equilibrium.

4. In automatical balances, the combinatien of a pivotal beam, feeding means for supplying the material to be weighed to a package member carried by said beam, shutters adapted to shut off said feeding means automatically and successively when the package member has'received the desired quantity by weight of the material, a member connected with the last-closing shutter, a pivotal catch adapted to engage with said member so as to hold the shutter in opened position, a catch-actuating pivotal lever cooperating with said catch, means acting upon said catch-actuating lever and exerting the necessary power for releasing said catch from said member, said catch-actuating lever arranged to bear against the beam when. the latter is not in the position of equilibrium. a double-armed lever cooperating with a member taking part in the move ment of said shutter, and an abutment carried by one arm of said double-armed lever, whereby in the shutting movement of said shutter, said abutment lifts the said catchactuating lever, making it free from cooporation with. the beam in the equilibrium of the latter.

In automatical balances, the combination of a pivotal beam, feeding means for supplying the material to be weighed to a package member carried by said beam, shutsaid catch, means acting upon said a counterweight connected to said piston brake member and adapted to be brought out of contact With said beam when in eqni- 10 librium.

In witness whereof I have hereunto set my hand.

PETER AUGUST NORDLING.

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