US1614682A

US1614682A - A cokpokation

Info

Publication number: US1614682A
Authority: US
Publication date: 1927-01-18
Anticipated expiration: 1944-01-18

Description

BEST AVAILABLE Cop.-4

1614682 Jan 18 1927 L. A. osGooD ET A1.

SCALE Filed July 31. 1922 3 Sheets-Sheet 1 BEST AVAILABLE COP` i SCALE Filed July 5l 1922 3 Sheets-Sheet 2 /7 7 69 5a e4 n 72- 67 69 70 73 se 631 7L 5 3 6 68 Q 6L $5 65 Q 2/ am? l j 65; 73X (f1.2 l es A 69 4 13 sm v 70 58j 7L Q1 7gJET y BEST AVAILABLE Cor#`- 1,614,682 Jan. 18 1927. A. OSGOOD ET A L l SCALE Filed July 31, 1922 l 3 sheets-,she'et s BEST AVAILABLE COF Patented Jan. 18, 1927.

nutren stares PATENT OFFICE.

LOUIS A. OSGOOD, OF DAYTON, AND ELMER E. WOLF, OF SPRINGFIELD, OHIO, AS-

IGNORS TO INTERNATIONAL SCALE COMPANY, OF DAYTON, OHIO, A CORIORATION OF ILLINOIS.

SCALE.

This invention relates to improvements in scales (Case 46) and is more particularly directed to improved combination of automatic load counterbalancing system and flexibly suspended lever system for driving the indicator in accordance with displacement ot the automatic counterbalancing system by the applied load. Other detailed objects of the present improvements will be more fully set forth in the accompanying specifications and claims.

In the drawings:

Fig. 1 is a. part sectional front elevation view of the improved scale.

Fig. 1a is a detail ot one ot' the parts shown broken away in Fig. 1.

Fig. 2 is a detail sectional view of load counterbalancing system. The section is taken on line 2-2 of Fig. 3.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2. l

Fig. 4-'is a detail central sectional view taken on line H of Fig. 1.

Fig. 5 is a small detail sectional view taken on line 5--5 of Fig. 1.

Figs. 6 and 7 are detail horizontal sections of the parts within the dial housing.

Fig. 8 is the detailed view of hub portion of the pivotal indicator showing sealing i! weights thereon.

Fig. 9 is a detailed View o'f the compensating cam and associated gravity weight.

The scale comprises the usual base level` system, not shown, supporting a load support and connected to a steelyard 12 which cxtends upwardly centrally within the housing or pedestal 13. Upon application of load to load support the steelyard 12 is drawn downwardly to extent proportional to the applied load. The upper end of the steel yard is threaded into a ball retaining collar 15 and into a lock nut 14. The balls of the retaining collar rest upon an annular pla-te .1l-3 which is supported on the top of a tube 17 and clamped there. by means of a suitable soc-liet and spilt casting 18. The'parts just described form a. swivel connection for the draft rod and permit the relative rotation of casting 1SA with respect to the steelyard 12 when it desired to rotate the dial housing of the scale.

The top ot pedestal 13 is provided with a casting having a ball race thereon receiving balls 19 which in turn support a depending head 2O rigidly carried by dial housing 1922. Serial No. 578,598.

21. These parts form a turn table device and permit the relative rotation of the dial housing with respect to the pedestal.

With a rotatable dial housing of this sort it is necessary that a particular form of dash pot be employed. This comprises a dash pot cylinder 22 which is supported by casting in any desired manner. This cylinder has a central threaded opening which receives an upstanding pipe 23, which pipe extends into the lower end of the pipe orl tube 17. Suitable nuts 24 and proper packing are provided to clamp the pipe 23 in the dash pot cylinderl 22. The plunger or piston of the dash pot is formed by two spaced plates 25 clamped'to the lower end ot pipe 17 and supporting between them a loose annular plate 26, having stuck up p0rtions or nubs thereon to prevent sticking of the loose plate to one'or the other of the supporting shoulder plates; This plunger construction permits the dash pot plunger to have free movement laterally in the cooperating cylinder and likewise a slight up and down movement to thereby provide the utmost freedom from friction and to minimizestickingand binding. The dash pot being axially mounted with respect to the center of rotation-of the dial housing and having a central opening permitsfthe steelyard'12 to extend through the center 'of the dash pot. At the same time the construction :of the dash pot-is such that it forms a seal and prevents the access of dust'into the dial. housing. It" will be understood that the dial housingis yclosed up in the usual manner by glass-plate, etc.

The casting 18 at-its upper end is drilled to receive tube 27 which 'orms a bearing for knife' edge 28 which knife vedge is carried by evener laars 29. These bars are spaced alpart and knife'edge 28 bridges and connects t icm.

It will be'understood that when theloadI is applied'to the scale platform that`

parts

28 and 29 are displaced directly in accordance with applied load.

The` automatic load counter balancing system will be best understood by. referring to Figs. 2 and 1.

Upon the application of a load the dra-ft rod 12 will be pulled downwardly drawing the eveners 29 downwardly to an extentproportional to the applied load. These eveners 29 are suspended by four iiexible tapes 30 which have a wrapped connection about substantially circular hubs 31 so as to rotate them in the direction of the arrows upon application of a load. The circular hubs 3l have proper curved rolling surfaces to receive theL flexible load transmitting tapes. The hubs 3l are also provided with proper curved rolling surfaces receiving flexible suspension tapes 33. These latter tapes are wrapped around rolling surfaces associated with the hubs 3l and cooperate with bearing plate 34 which is disposed between the'two tapes 33. Plates 34 are suitably supported in the frame of the machine from studs 34a. Also fastened to 'the hubs are pendulums 32 having their stems relatively crossing each other as shown. Upon the application of a load the eveners 29 draw downwardly upon tapes 3() causing the pendulum 32 to swing outwardly and upwardly and causing

tapes

33 and 30 to unroll from their cooperating rolling surfaces. Rigid with the hubs are arms 36 which upon application of a load swing in the direction indicated by the ar.- rows. These arms 36 have arcuate end portions 37 about which there is wrapped and fastened a tape 38. The tape 38 is connected to a stud 39 carrying a knife edge 40. The foregoing parts constitute the automatic pendulum load counterbalancing system of the scale. This dial system is connected through knife edge 40 with a superimposed flexibly connected lever system. The knife edge 40 rests in bearings 45 carried by a pair of joined plates 46, Fig. 6, which plates form a lever of the second order. The lever 46 is provided with an adjustable balance. weight 47 and for its fulcrum utilizes a vpair of flexible tapes 48 which extend over the rolling surfaces of blocks 49 carried by the end of the lever. Tapes 48 are fastened at their upper ends over rocker arms 50 which are pivoted in the frame of the machine and adjustable as will belaterdescribed. The lever 46 at its opposite end carries tape-'bearing blocks 5l provided with a curved rolling surface upon which are supported flexible tapes 52. These tapes extend upwardly and are fastened over similar blocks 53 carried b v lever T his lever is likewise made of two space plates (sce Fig 7 Flexible tapes are utilized to form a suspension and fulcrum for this lever 54. For this purpose a tape supporting shaft or stud is fixed in the frame of' the machine and at each side of plate 54 there is provided a depending tape 5G which at its upper end is fastened to the shaft 55 and at its lower end is wrapped about and fastened to a curved bearing block 57 which is directly fastened to plate As shown in Fig. l there are two tapes for each side play or four tapes to suspend the entire lever. Each pair of tapes relatively cross and intersect'each other andthe curved bearing blocks 57 are shaped and located so as to provide for the intersection of the tape suspension line. In this way a predetermined fulcrum point is secured for lever 54.

The opposite end of lever 54 carries tape bearing blocks 58 each of which carry a plural-ity of superimposed tapes. One pair 59 extend to and support a counter weight 60. The other pair 6:2 extend to and pass over the curved surface of block 63 which block is carried by supplementary lever 64. The end of this last mentioned pair of tapes are adjustably connected to the lever by means of the pivoted tape adjusting device 65. There is also provided a second supplementary lever 66 which in many respects is similar to lever 64 and this lever is interconnected to the free end of lever 54 by tapes 67 which roll over tape 52 on block 53 and over blocks 63 and finally connect with tape adjusting device 65 mounted on lever 66.

Levers

66 and 64 are fulcrumed upon pin bearings 68 which are adjustably mounted in the frame of the device by means of pivoted adjustable arms 69. Suitable stop screws 70 are also provided to limit the side movement of the levers at their fulcrum point. The supplementary levers 64 and `66 are utilized to drive the pivotal indicator 71. For this purpose the levers are-provided with bearing blocks 7 2 over which pass tape 73 which in turn pass under and are fixed to a roller or arbor 74 which carries the pivotal indicator 7l. The tapes 73 form a free floating suspension for the indicator and its arbor and obviate the use of any bearing or pivot therefor. The effective length of. tapes 73 may be adjusted by adjusting devices 65 which are provided on each lever at the end of the tapes.

Mounted upon the opposite end of the indicator arbor from the indicator is gravity weight pulley 75 which by means of flexible tape 76 supports gravity weight- 77. The purpose of this weight is to take up any slack in the tape system. Furthermore, this pulley may be provided with compensating cam contour to bring the scale to exact seal and cause the indicator to move equally under equal increments of applied load (scc Fig. 9,).-

The scaling` of the scale may also he secured by adjusting sealing weights 7) on indicator 7l (see Fig, S).

The load dial 80 is of the usual forni and is supported in any desired manner in the dial housing. ln addition to the low graduations this dial is also provided with graduations extending back of zero in the blank space as shown at 8l to provide for lare indications.

T11-order to set the scale for tare weight knob 89.- (see Fig, la) is rotated thereby turning shaft 83 and drawing threaded block 84' to the right thereby lowering the CII part 50. The lowering of 50 slacks olf on tapes 4.8 and causes lever 46 to rock anticloclrivise about as a center. This movement slacks off on tapes 52 and allows lever 54 to rock anti-clockwise under the point of the gravity Weight 60. uThe movement of lever 54 rocks the supplementary levers 64- 66 in such a Way as to turn pivotal indicator acjr of Zero to the desired point on the tare Zero adj ustment of the scale is secured by adjusting a stop stud 85 to sivingl the parts 5() and bring the indicator to zero. Restoration of part is secured by means of spring 86.

`We claim:

l. In a Weighing` scale comprising a fixed frame and a movable load supporting memsupporting member and said indicating devices, a supporting fulcrum for said lever comprising a plurality of tapes fixedly supported to said frame above said lever, curved blocks carried by said lever over which said tapes pass, said blocks and tapes being so arranged that the plane of one tape intersects the plane of another tape to predetermine the fulcrum point of the lever.

2. A Weighing scale comprising in combination, a Weight indicating means, a load supporting element and intermediate movement multiplying connections betvveen said element and means comprising a plurality of levers operatively connected together by flexible tape-like members, and an interconnected automatic counterbalancing means.

3. A weighing scale comprising in com-- bination with a load support, an indicator, operating connections intermediate the load support and indicator comprising automatic load counterbalancing means connected to said load support, a lever system connected to said load counter-balancing means and operatively connected to said indicator, said lever system having a flexible tape suspension and flexible tape-like connections intermediate the levers forming said lever system.

4l.. A Weighing scale comprising a load support, an indicator, operating connections intermediate the load support and indicator comprising an automatic load counterbalancing means and a lever system having a flexible tape-like suspension and flexible tape-like connections intermediate the levers forming said lever system.

5. A Weighing scale comprising a load support, an indicator, operating connections therebetween comprising an automatic load counterbalancing system, an interconnected lever system intermediate the load counterbalancing means and the indicator, and flexible tape-like driving connections intermediate said lever system and indicator.

6. A Weighing scale comprising a load support, an indicator, operating connections therebetween comprising an automatic load counter-balancing system, an interconnected lever system, and flexible tape-like driving` connections intermediate said lever system and indicator, said last mentioned tape-like driving' connections forming a freely floating suspension for said indicator.

7. A weighing scale comprising a load support, an indicator, operating connections therebetween comprising an automatic load counterbalancing system, an interconnected lever system and flexible tape-like driving connections intermediate said lever system and indicator, the aforesaid lever system comprising a plurality of levers, flexible tape-like members connecting said levers with each other and tape-like fulcrums for the said levers for the purpose described.

8. A Weighing scale comprising in combination, a load support, an automatic load counter-balancing system, an indicator, a lover system intermediate the load support and indicator, and comprising a plurality of levers and tare adjusting devices adapted to shift one of the fulcrums of one of the levers of the lever system and thereby displace the indicator.

9. A Weighing scale comprising in combination, a load support, an automatic load counterbalancing system, an indicator, a lever system intermediate the load support and indicator and comprising a plurality of levers, tare adjusting devices adapted to shift one of the fulcrums of one of the levers of the lever system and thereby displace the indicator. and a gravity Weight associated with said lever system and indicator for displacing the latter upon the adjustment of the tare devices.

l0. A Weighing scale comprising in combination, a load support, an automatic load countcrbalancing system, an indicator, a lever system intermediate the load support and indicator and comprising a plurality of levers, tape-like connections intermediate the said levers, and tare adjusting devices adapted to shift one of the fulcrums of one of the levers of the lever system and thereby permit the displacement of the indicator.

ll. A weighing scale comprising in combination, a load support, an automatic load counterbalancing system, au indicator, a lever system intermediate the load support and indicator, and comprising a plurality of levers, a tape-like fulcrum for one of the levers of said lever system. and tare adjusting devices adapted to shift said tape-like fulcrum to raise or lower the latter and thereby cause the displacement of the indiat-or.

Cil

12. A weighing scale comprising in combination, a load support, an automatic load counterbalancing` system, an indicator, a lever system intermediate the load support and indicator, and comprising a plurality of levers, a iiexible tape-like fulcrum for one of the levers of said system, a rocking` curved tape supporting member upon one of said levers, and tare adjustingdevices having a tape connection with said supporting,` member for changing the fulcrum position of the lever and thereby causing the displacement of the indicator.

13. A. Weighing scale including;l a dial housing, a. draft rod extending therein, a member connected to said draft rod, a pipe depending' from said member about said draft rod, dash pot cylinder concentric therewith, an upstanding pipe projecting from said cylinder in telescopic relation to said first mentioned pipe, and a dash pot plunger carried by said first mentioned pipe.

14e, A weighing); scale including' a dial housing', a draft rod extending therein, a swivel connection on said draft rod, a member connected to said swivel connection, a pipe dependingl from said member about said draft rod, a dash pot cylinder concentric therewith, an upstanding pipe projecting' from said cylinder in telescopic relation to said first mentioned pipe and a dash pot plunger carried by said first mentioned pipe.

15. A ivighing scale comprising a load support, a pendulum automatic load counterbalancing' means, flexible suspension and load transmitting` means therefor, a lever system includingl a lever having a flexible tape suspended fulcrum at one end, an intermediate connection to said automatic load counterbalancing means, curved bearing block devices at the end remote from the fnlcrum, cooperating tape members thereon, a pair of supplementary levers, one of Which is connec ed to the first mentioned lever by said tape members, an intermediate lever having a fiexible tape fulcrum, flexible tapeiike members connecting` the ends of the intermediate lever With the said supplementary levers, a pivotal indicator having a hub, and flexible tape-like connections intermedi.- ate said supplementary levers and indicator, ntid connections adapted to form a floating` suspension for the indicator hub.

16. A lever system for a Weighing' scale, comprising a load support, load offsetting' means and a multiplying lever system, said lever system comprising a plurality of coacting levers, curved bearing blocks on said levers having' curved rolling` tape receiving; surfaces and flexible tapes passino; over said surfaces and connected with said levers for transmitting movement from one lever to another.

17. A lever system for a Weighing scale, con'lprising a load support, an interconnected multiplying` lever system, load offsetting means, said multiplying' lever system comprisinglT a plurality of coacting levers, said evers having` thereon curved bearing` blocks provided with curved rollingtape receiving surfaces, certain of said blocks being adapted to receive flexible tapes forming the fulcrums of the levers and other of said blocks being adapted to receive 'flexible tapes which transmit movement 'from one lever to another.

18. A lever system for a weighing,` scale, comprising a load support, load offsettingmeans and a multiplying),` lever system connected with said load offsetting means and therethrough to said support, said multiplyv ing' lever system comprising a plurality of coacting levers, said levers having curved bearing blocks thereon forming curved rolling tape receiving surfaces, flexible tapes passing over said surfaces 'and connected With the said levers for transmitting' movement from one lever to another and adjusting devices on said levers for varying' the effective length of the tapes.

In testimony whereof We hereto affix our signatures.

LOUIS A. OSGOOD. ELMER E. lVOLF.