US1504555A - Weighing scale - Google Patents

Description

Aug. 12 1924.

Original Filed July 25,

C. H. HAPGOOD WEIGHING SCALE 1914 2 Sheets-Sheet 2 l o Z 6 6:8 8

l* 4 o W@ a nvenFoz f @Hof/41 A Patented Aug. 1.2, 1924.

UNITI-:D` STATES PATENT OFFICE.

CLARENCE H. HAPGOOD, OF TOLEDO, OHIO, ASSIGNOR'TO TOLEDO SCALE COMPANY, OF TOLEDO, OHIO, A CORPORATION F NEW JERSEY.

WEIGHING SCALE.

Original application led July 25, 1914, Serial No. 853,061. Divided and this application led April 28,

1920. serial No. 376,724.

of Ohio, have invented certain new and useful Improvements in Weighing Scales, of which the following is a specification.

L This application is a division of my copending application Ser. No. 853,061, filed 10- .my 25, 191i.

My invention is designed more particul larly with reference to platform scales and is shown in the drawings accompanying this specification as embodied in a device of this character, but in certain of itsfeatures it is applicable to other forms of scale, and it is to be understood that the specific disclosure is for the purpose of exemplificationonly. The scope of the invention is defined in the following claims, in which I have endeavored to distinguish it from the prior art so far as known to me without, however, relinquishing or abandoning any portion or feature thereof.

Referring now to the accompanying drawings Figure 1 is a side elevation, partly in section, of the preferred form of my scale;

Figure 2 is a plan view partly in section and'with parts removed, as will hereafter appear, to more fully disclose certain other parts; and

Figure 3 is an elevation lon an enlarged scale butppartly broken awayand in section Showing the counterbalancin'g mechanism,

the view being taken from the right of Figure 1. l

The same symbol of reference is applied to each ofthe parts wherever it may occur A4.0 throu hout theseveral views.

Re erring -rst'to Figure l, the base or leverage casing'7 is preferably formed 'of cast metal and provided on the interior thereof at 8.a`nd 9 with pairs o f knives from` which the leverage system 1s suspended.

Said leverage system comprises a long lever 10 which is or may be cast in any form desired, vand comprises a longitudinal member 11 (seeFigure 2) and a air of transverse members 12,13, each of w ich carries knives 14, 15 atits opposite ends, the lever being suspended by knives 14 and loops or stlrrups 16 from the knives 8 heretofore mentioned, upon the base. The particular form of the loops or stirrups is not essential t0 the present invention, but I have shown the loops as comprising an inverted- U-shaped metal strip 17 looped over the knives 8 and embracing between its side members a block 18 having a seat for the knife 14 ofthe lever. The knives 15 upon the ends of the transverse member 13 are for the support of the platform, as will presently appear. A second or short lever member comprises a longitudinal member 19 and a pair of transverse members 20, 21, having knives 22, 23 at their respective opposite ends, the knives 22 on transverse member 2() being connected by loops or stirrups like those described4 above with knives 9 referred to above, upon the interior of the base of the scale, and the knives 23 supporting the forward end of the platform, as will presently appear. The longitudinal member 19 of the secondary lever is arranged to one side of the vertical plane ofl the corresponding member of the main or long lever and the two levers are connected 'together at an intermediate point by a stirrup member or loop 24 embracing laterally extending knives 25, 26 upon the main and secondary levers respectively. The platform 27 of the scale is mounted in an opening in the base and provided with legs 28, 29 having suitable bearing blocks 30, 31 in their lower ends, legs 28 resting upon the knives of the transverse members of the main lever and legs 29'similarly resting upon the knives of the transverse member 21 of the secondary lever. It will now. be seen 'that as the forward end of the main lever is supported'as usual by the counterbalancing mechanism, the secondary lever is supe ported therefrom by the loop 24 and exerts an upward pull. upon the stationary knives 9. rllhus, the weight of this part of the device is distributed between 'the knives 8 at the forward end of the scale baseand the counterbalancing mechanism. 4

Upon the rear end of the scale base is mounted a column 32 which at its up er end supports a casing 33 for the oounteralancing mechanism. The upper end of the column is somewhat enlarged and carries a main beam 34 which is pivoted at 35 therein, and connected to the leverage system in the base of the scale by the usual-'link 36. The beam extends throughA the walls of the column at opposite ends, as at 37, 38, and is .bya

beam. A loading box 54 is attached to one.

end of the main beam 34. This feature is described in detail and claimed in my original application above referred to.

The tare and capacity beams just referred to are not employed in the normal use of the scale but only when it is desired to Weigh'tare or use the scale beyond the capacity of the automatic counterbalancing mechanism. The latter comprises a pair of pendulums 62, 62, which are suspended from suitable bearings 63, 63 in the casing 33. Preferably these bearings are mounted upon brackets '64 depending from the upper portion of the casing. Each of these pendulums' is provided with a segment 65 and the two segments are connected by ribbons 66 with an equalizer member 67. To the latter is pivoted a loop or eye 68 from which connection is made to the beam of the scale by a suitable link 69. As usual in pendulum scales, a load placed on the platform thereof through the intermediate connections which have been described raises the pendu- `lums until the load is counterbalanced. The inward swing of the pendulums is limited pair of buffers 7 O,y 70 mounted upon a bracket 71 formed integral with the casing.

To each of the pendulums is also rigidly attached a second segment 7 2 and the two segments are connected by ribbons 73 with an equalizer bar 74 from the center of which a rack bar 7 5 extends upward and carries a rack 76 which engages a pinion 77 upon the shaft of an indicator hand 78. The hand cooperates as usual with a circular scale 79.-

The rack may be maintained in engagement with its pinion by an anti-friction roller 80 and a weight 81 mounted eccentrically thereof on the side towards .the pinion. From the center of the equalizer bar 74 is suspended a poise plate or support 82 upon which may be. placed poises 83 of a weight suiiicient to counterbalance the other parts of the scale.

Obviously, when a load is placed upon'the scale platform of the 'automatic counterbalancing mechanismthe pull of the load is transmitted through the link 36 to the beam. 34 of the scale and thence through link 69, loop 68,*equalizer 67 and ribbons 66 to the ndulums, which are thereupon swung outward until they counterbalance the load of the scale. The movement of the pendulums is, of course, accompanied by a raising of the equalizer bar 74 through segments 72 and ribbons 73, whereby the rack 76 rotates the indicator hand proportionately to the amount of load upon the s'c'ale.

The distribution of weight in the weight second sector.

box 54 and weights 83 is such as to properly counterbalance the other parts of the scale.

While it will be apparent that the illustrated embodiment of my invention herein disclosed is well calculated to adequately fulll the objects primarily stated, it is to be understood that the invention is susceptible to variation, modification and change within the spirit and scope of the subjoined claims.

Having described my invention, I claim:

l. In a weighing scale, in combination, a pair of platform levers each comprising a on said transverse member, arms extending laterally from said longitudinally-extending member, load pivots on said arms, and means connecting said levers between said transverse members and said arms.

2. In a weighing scale, in combination, a pair of platform levers each having a longitudinally-extending member, a transverselyextending member and a pair O f laterallyextending arms, said transverse members and laterally-extending arms carrying load and fulcrum pivots respectively, and connecting means pivoted to said levers between said transverse members and laterally-extending arms.

3. In a weighing scale, in combination, a pair of platform levers each having a longitudinally-extending member, a transverselyextending member and a pair of laterallylongitudinally-extending 'member, a transextending arms, said transverse membersl and laterally-extending arms carrying load and fulcrum pivots respectively, and connecting means pivoted to said levers between said transverse members and laterally-extending arms, the transverse members of one of saidl levers lying adjacent the laterallyextending arms of the other.

4. In a weighin scale, in combination, a base, a long plat orm lever of the second order fulcrumed thereto, lever of the third order fulcrumed to said base, load pivots on said levers lying between said fulcrums, and means for connecting said levers, said connecting means lying between said load pivots.

5. In a weighin scale, in combination, a pendulum, an in `cator, a pair of sectors connected to said pendulum, a power member meansy connecting` said powermember to one of said sectors, and a ribbonconnecting the other of said sectors to said indicator.-

6. In a weighing scale, in combination, a pendulum, a power sector connected to vsaid pendulum, a second sector of greater radius connected to said pendulum, an indicator and means `connecting said indicator said 7. In a weighing scale, in combination, a

pair of oppositely-swmgmg, pendulums,

a short platform power sectors on said pendulums, other sectors on said pendulums, an indicator and means connecting said indicator to the said second sectors.

8; In a weighing scale, in combination, a

-pair of oppositely-swinging pendulums,

pair of oppositely-swinging pendulums,

power sectors on said pendulums, other sectors of greater radius on said pendulums,

a pair of ribbons connected 'to the' said sectors of greater radius, a compensating member connected to said ribbons, and indicating mechanism connected to said compensating member.

10. In a weighing scale, in combination, load-offsetting means comprising a pair of pendulums, vbearings from vwhich said .pendulums are suspended, sectors fixed 'to said pendulums, ribbons connected to said sectorsfand depending therefrom, means for connecting said ribbons at their lower ends,

connections from said means to the 'load` osetting means, other sectors mounted upon said pendulum members, ribbons depending from the second said sectors, a cross memberconnecting said ribbons, rotary lindicating means, and connections from vsaid cross member toA said indicating means.

11. In a weighing scale and in combination with the main beam thereof, a casing, load-offsetting means comprising .a pair of pendulums mounted in said casing, indicating means, a sector mounted on each pendulum, a ribbon depending from each sector, an equalizer member connecting the lower ends of said ribbons, connections rom said equalizer member to the beam, a second sector connected to each of said pendulums, ribbons depending from said second Sectors, a compensating bar connecting the lastmentioned ribbons, and connections from an intermediate point of said compensating bar for operating said indicating means.

l2. In a weighing scale and in combination with the main beam thereof, loadofsetting means comprising a pair of pendulums, indicating mechanism, a sector on each pendulum, a ribbon depending from each of said sectors, an equalizer member connecting the lower ends of said ribbons, connections from said equalizer member to said beam, a second sector connected to each of said pendulums, ribbons depending from said second sectors, connections from an intermediate point of said compensating bar for operating said indicatingmeans, and a poise receiver connected to said compensating bar. Y

CLARENCE H. HAPGOOD.

Witnesses: I

C. E. WILooX,l C. OQMARSHALL.

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