US1558616A - Weighbeam - Google Patents

Description

7 A C. HOWARD WEIGHBEAM Filed Oct. 15. 1924 2 Shoots-Sheet 1 INVENTOR Clioward,

ATTORNEY Oct. 27, 1925. I 1,558,616

A. C. HOWARD VIEIG'HBEAM ts-Sheet 2 n 22 j W 24 INVENTOR ATTORNEY Patented Oct. 27, 1925.

UNITED STATES PATENT OFFICE.

ALFRED C. HOWARD, 0F MOLINE, ILLINOIS, ASSIGNOR '10 E. AND T. FAIRBANKS AND COMPANY, OF ST. JO'HNSBURY, VERMONT, A C RPORATION OF VERMONT.

WEIGHBEAM.

Application filed October 15, 1924.

To all whom it may concern:

Be it known that I, ALFRED C. HOWARD, a citizen of the United States, residing at Moline, county of Rock Island, and State of Illinois, have invented certain new and useful Improvements in Veighbeams, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to weigh-beams for use with scales.

It is an object of the invention to provide an improved means for mounting a traveling poise on a weigh-beam whereby the points of suspension of the poise will be unaffected by slight irregularitiesin beam or poise condi tion under varying conditions of service.

Another object of the invention is to pro-- vide an improved weigh-beam of the character mentioned which is relatively simple in construction and reliable and exact in function under all conditions of service.

Other objects will be in part obvious from the following detailed description and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combination of elements and arrangementsof parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings wherein one embodiment of the invention is disclosed Figure 1 is a side elevation of the improved weigh-beam;

Fig. 2 is a horizontal section through the poise, taken approximately on the line 22 of Fig.1; i

Fig. 3, is a face view of one of the sections forming the poise, as seen from the line 33, of Fig. 2 showing the manner in which the poise is mounted on the beam;

Fig. 4 is a vertical transverse section taken on the line 1-4-of Fig. 3, and

Fig. 5 is a similar view taken on the line 55 of Fig. 3.

As shown, the weigh-beam is pivotally supported upon a beam stand 1 attached to the upper surface of a. beam sheli (not Serial No. 743,653.

is provided with a pivotally mounted loop a, that is connected to the lever system of thescale in the usual manner.

The weigh-beam includes a main bar 5 on which is mounted, in a manner to be here inafter more fully described, a poise 6, and a secondary bar '7, which is suspended beneath the main bar 5, and carries a pair of poises 8 and 9. The main bar 5 is provided with notches 10 on itsbottom which are engagedby a pawl (not shown) that is actuated by a lever 11, pivoted in the poise 6. while the secondary bar 7 has notches 12 formed on its top for retaining in position the poise 8 in the usual manner. Carried by the poise 6 and positioned above the main bar 5 of the beam, is another bar 13 on which is slidably mounted a poise 1 1.

Each of the poises are rectangular in outline and they are each provided with a relatively large central opening 15 through which the scale graduations can be easily read, a vertically disposed, tapered indicator 16 being providedfor.pointing to the scale markings. By preference the openings 15 are made wide enough to permit the numbered graduations to be visible without the necessity of shifting any of the poises after they have been correctly set in position.

In use, the poise 6 is the main poise, and the indicating point 16 thereof is adapted to register with scale graduations 17, formed on the bar 5. These graduations can be spaced to indicate divisions of 100 pounds each. On the bar 13 graduations 18 can be formed, and such graduations can be numbered from 0 to 100. Thus. by setting the poise 6 to the next highest 100 pound division and then shifting the poise 1 1 to obtain proper balance of the beam, by adding the fractional weight indicated by such poise to the larger weight indicated by the poise 6, the total weight can be obtained.

The purpose of the secondary bar 7 and its two poises 8 and 9 is to enable the reading of tare weight, therefore the portion of this bar on which is mounted the poise 8 and which portion also has formed thereon the notches 12, is provided With scale graduations. 19 indicating divisions of 100 pounds each, While the portion of the bar on which slides the poise 9 is graduated, as at 20, into divisions that can be numbered from O to i graduations on the bars 7 and 13 have; been omittedfrom the drawings, only the lines in- V dicating th points 0,20, 40; 60, 80and 100,

ing. Sho

If; so desired the scale graduations; lTcan .be marked on-strips 21 set into recesses formed onthei faces of the beam, as clearly shown by liiguresfi and 5.

z lhe uppersurface otthe. bar is in the nature of a traclg consisting of two spaced parallel portions which are arranged along theunar-ginaledgesof the lbeam and a flat longitudin a l, rib 23 xtending 4 above, and

positioned between, the parallel traclrpor- 1 tions As the poise fi isrelatively heavy, it is desirable that ;it -be supported from the beam by anti frictionmeans. In: the prescnt instance I have chosedto suspend. the

p-oise by rollers2el andi25. By preference- 1 the poise 6 is composed of similarly formed half. sections which are a suitably secured to gether by screws. ln- Ifigure 18, I have hown the innciyface .view of 7 one of the poise; sec i ns; d f the SQ B S; tee h o fasten the parts together are threaded into the openi s 26 indicated insuch View.

; fin l/ ha be 7- hishi urr unds the b miherollers '24 angl ers mounted in each end of thepoise fabove; the chan1ber 27. The

- o ler: 2 ,i ad p d mcpnt ct vwith. the track portion 22 ancltherefore it is pro;

vicled PWitha. pairofspacedflanges 28 which straddle the rib 23 On the otherhand, the

roller ,25 ;is. designed to, support ,'the poisev ,from the rib 23 of-1 thegtrack, andtherefo-re' it s fOlIllEClWltll a central concaved bear- ;ing portion 29,.- andalso hasa pair ofspaced flanges 30,; which are; lesser in diameter than the flanges 28 of theroller 24 Each of the. rollers[2$and 25 areprovided .With trunnions 3l that are journaled in openings 32 f-or1ned in the vside Walls of the jpoise. In manufacturing roller 24h the cent-ralportion thereof between the flanges 28; can f be ,made of substantially the same diameter as thetrunni-ons3l, While in the manufacture 1 of thenroller ,25, the central portion.2 9[thereof should be made. semewha-t greater I in diameter than the trunnionsf As the flanges 30 of the roller 25 are smaller in diameter than the flanges on the roller 24L, such flanges 30 Will not con- 7 tact'with the track 22 during movement of the poise along the beannas will be readily understood. 7 7

he mounting of the poise 6 on the beam is such that the poise will be suspended from three points on: the beam, two on the points being affordechatone-end by the flanges of the roller 24, and the other point being at the opposite end of the poise by the centralportion of the roller 25.

This arrangement of rollers provides means for preventing. rocking. across the corners of the poise which oceurswhen a four -ipoint suspension is used. The means for suspending the poisein thej n' anncr above s'et forth permits; thepoise to readily ,mov'e over the ,beam track, and always take a correct position irrespective of slight, irregularities in the track surface or roller bearings.

As many changes could be made in the above construction and many apparently Widely. different embodiments; of this inven-V tion could .be nade without departing from the scope thereof, it is intended that all matter contained inthe above description guage, might be sa d to fall therebetween.

l-Iaving tl us iclescribed my invention,

- what I claim, 13f:-

7 A Weigh-beam. hav ng a ong u i y extendingtraek provided with an upstanding, ribi anda poise suspended ,ffrom sa-id beamby a pairof flanged rollers so formed as to afford a three-point contact with jthe track, ,one point ofcontact being with said rib; V 7

2. A poise for Weigh-beams havinga pair of, flanged suspension rollers. mountedlthere in for movement over a beam track-with an upstanding centrally disposed rib, whereby the poise will ;-be suspended from three points on said beam.

a A weigh-beamhavin a longitudinally extending rib on the upper side thereof, a

poise mounted on the said beam, and ,a pair of flanged supporting rollers carried by the said poise, one ofsaid rollers straddling the said rib,

4. A poise for Weigh-beams having a pair of suspension rollers mounted therein for movement over a beam track with an upstanding centrally disposed rib, one-of said rollers jhaving 'fia'nges engaging the track on each side of the rib, avhilexthe other roller engages said rib, thereby supporting dling the said rib and the other roller riding the poise at three points. on the rib, whereby said poise is supported A Weigh-beam for scales having a lonby three points. 10

gitudinally extending rib on the upper side In testimony whereof, I hereunto sign my 5 thereof, a poise mounted on the said beam, name.

and a pair of supporting rollers carried by the said poise, one of the said rollers strad- ALFRED C. l-IOVARD.

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