US837955A - Truck-scale. - Google Patents

Description

No. 837,965. PATENTED DEG. l1, 1906.

`o. 'w PARSELL. 'TRUCK SGALE-` APPLICATION FILED DEO.l 22,1903.

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UNITED STATES PATENT OFFIOE.

TRUCK-SCALE.

Specification of Letters Patent.

Patented Dec. 11, 1906.

Application filed December 22, 1903. Serial No. 186.167.

T0 @ZZ whom, t noa/y concern:

Be it known that I, ORLANDO I/V. PAnsELL, a citizen of the United States, residing at Flushing, in the county of Genesee and State 'of Michigan, have invented certain new and platform, so that it will rest upon the frame of the truck when it is not in use for weighmg.

The invention further consists in the construction of the levers and the construction of the beam, all as more fully hereinafter d escribed.

In the drawings, Figure l is a vertical central section through my improved truckscale, showing the levers raised in position for weighing. Fig. 2 is a similar section showing the levers in their lower position with the platform resting on the frame when out of weighing position. Fig. 3 is a perspective view showing one of the levers and. part of the other and illustrating the manner of con structing the levers. Fig. 4 is a cross-section on line of Fig. 3. Fig. 5 is a cross-section on line y g/ of Fig. 3. Fig. 6 is a perspective view of the beam.

A is the scale-platform, which is also the platform of the truck, the truck being formed of the side bars B and the cross-bars B, the side bars being extended to form the usual handle C, as is well known in warehousetrucks. A are the usual bearing-feet C, which vrest upon the pivots of the levers, as is usual in scale construction. Said bearing-feet O are secured to the members B, which constitute the stops for abutting against the cross-bars B to limit the longitudinal movement of the platform. u

The levers I preferably construct as shown in Fig. 3, in which there are shown two triangular levers D D', suspended at the corners Upon the under side of the platform` of the frame by the usual loops a and connected at the middle by a connecting-loop E in the usualmanner of connecting-levers in the central portion of the scale. The lever D, I preferably form of three bars of band or tire iron b c (l, the bar b being a straight bar, the bar c extending at an angle thereto and having an end portion e extending parallel with the end of the bar l), while the opposite end has the loop 7i formed therein, bearing against the bar b and riveted to that bar and having on opposite sides of that loop the parallel portions i, separated from the bar b a sufficient distance to allow the pivots I' and Z being passed therethrough. The pivot r is the pivot with which the loopE engages in the lever D. The bar d is a cross-bar having its ends bent down, as shown in Fig. 3, and riveted to the bars c and b near the ends.

In order to form a proper pivot-bearing on the ends of the lever, I form the casting or blocks of metal F, which I secure upon the ends of the bars l) and c, as shown in Fig.3, and rivet or otherwise secure the blocks to the ends of these bars and secure the usual pivots therein for the suspended loops and the bearing-feet C', as usual in scale construction, and which, therefore, I need not further describe. The lever D has similar blocks and cross-bars at its outer end, and at the inner end it is formed in the shapeof a loop F, through which loop I pass the pivot m for the lower end of the loop E.

Extending from the lever D to the beam is a bar G, pivoted at one end to the lever D and at the other end connected to the beam Hin the usual manner. This bar G, with the lever D, forms what is known in scale parlance as the long lever of the scale.

Between the middle portion of the bar G and the pivot Z at the inner end of the lever D, I arrange toggle-levers J, with a central rule-joint.

Pivoted to the end of the bar G near the beam is a lever Ii, preferably a bell-crank lever, one arm of which I connect by the rod K/ to the upper lever of the toggle J, so that this toggle may be straightened or broken, as shown in Figs. l and 2, by operating the lever K.

I is a tie-bar connected to the end of the lever D at the toggle connection therewith and at the other end to the outer end of the bar G with a slightly loose oint, as shown in Fig. l.

The parts being thus constructed, they op- IIO crate as follows: IVhen the scale is being loaded, it is desired that the platform should rest upon the frame of the truck, and the handle of the lever K is depressed, which will collapse the toggle into the position shown in Fig. 2, allowing the inner ends of the levers D and D to lower, and thereby lowering the bearing-pivots thereof, consequently allowing the platform to descend until it rests upon the frame of the truck, as shown in Fig. 2, and so that the load on the platform does not rest upon the scale-pivots. In this lower position of the levers the two short levers hang Afrom their corner-loops and are prevented from going lower by the fact that they are tied together at the middle by the loop E. Now to lift the levers into weighing position the operator lifts upon the lever l, which straightens out `the toggle J into the position shown in Fig. 1. rIhis raises the inner ends of both the levers D D and their bearing-pivots, lifting the platform free from the frame, while the weight is transmitted from the levers D and Dl through the toggle J to the bar G and thence to the beam, where it will be weighed in the usual manner.

It will be observed that the lever D and the link I, together with. the bar G, form a substantially truss-shaped structure, of which the toggle J forms the strut, so that when the scale is in weighing position the long lever is formed by these parts and is, in effect, a truss or truss-lever.

To make the beam II, I take a single bar of metal O and bend it at the ends to form the vertical extensions P, and to these end cX- tensions I connect the upper beam member Q, and thus have a double beam formed of two pieces, and upon each member I apply a sliding poise n and 0, of course applying the usual graduations to the beam members. Near one end of the lower beam member I screw on a block R, in which the beam-pivots are secured, and between this block and the end of the beam I apply the usual counterbalance poise or adjusting poise S. This simpliiies the construction of the beam and considerably cheapens it.

The truck of course has the usual front axle T, with suitable wheels T', and at the other end suitable legs U to keep the platform clear from the iloor.

What I claim as my invention is- 1. In a scale, the combination of two levers, D and D pivoted at their outer ends and looped together at their inner ends, ol' a beam, a bar extending from the lever D to the beam, a toggle connection between this bar and said lever, and means connected to the bar for straightening and breaking the toggle.

2. In a scale, the combination of the levers DD, a beam, the bar G pivoted to the lever D and connected to said beam, the toggle J between the bar G and lever D, the bellcrank lever K on the bar G, connected to the toggle, for actuating the same, and the link I between the lever D and the bar G.

3. In a scale, a lever comprising sections of bar-iron, metallic end blocks extending around the ends of the sections and the pivots therein.

4. In a scale, the combination of two levers pivoted at their outer ends to a suitable support, and looped together at their inner ends, a beam, a bar extending from the outer end of one of said levers to a point adjacent the beam and connected to the latter, a toggle connection between said bar and lever, and means for straightening and breaking the toggle.

5. In a scale, the combination of levers, a beam, a bar operatively associated with one of said levers and the beam, a toggle between said lever and bar, and means for actuating the toggle.

6. In a scale, the combination of levers, a beam, a bar operatively associated with one of said levers and the beam, a toggle between said lever and bar, and means for actuating the toggle, including a bell-crank lever.

7. In a scale, the combination of levers, a beam, a bar operatively associated with one of said levers and the beam, a toggle between said lever and bar, means for actuating the toggle including a bell-crank lever, and a link between the lever and bar.

In testimony whereof I a'llix my signature in presence of two witnesses. 4

ORLANDO WV. PARSELL.

IVitnesses JAMEs JONES, A. W. IIAMAKER.

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