US811979A - Spring-scale. - Google Patents

Description

PATENTED FEB. 6, 1906.

0. C.- WIBSE.

SPRING SCALE.

APPLICATION FILED DEG.31,1904.

3 SHEETSfSHEET 1.

w vl maxw No. 811,979. PATENTEDPEB. s, 1906. 0. 0. WIESE.

SPRING SCALE.

APPLICATION FILED DEC.31,1904.

3 SHEETS-SHEET 2.

Eye. 1' 3 layi 1 No. 811,979. PATENTED FEB. 6, 1906.

I .0. G. WIESE.

SPRING SCALE.

APPLICATION FILED DEG.31,1904.

3 SHEETSSHEET 3.

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UNITED STATES PATEXT o FI-o NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO OSCAR MAYER, OF NEW YORK, N. Y,

SPRING-SCALE.

To all whom it mm); (run/corn.-

Be it known that I, Or'ro C. WIESE, a citizen of the United States, residing in the"bor oughof Brooklyn, in the county of Kings, in

the city and State of New York, have invented certain new and useful Improvements in Spring-Scales, of which the following is a specification.

Fig. 1.

. This invention relates to the general class of spring-scales, and particularly to such scales of that class as have means for re ulating the-tare by raising the spring in or er to brin the hand or indicator to the zero-point graduated plate, as the case on t e dial or be. 7 I he principal object ofthe present invention is to provide such a scale with two springs and with means whereby both springs may be regulated through levers simultaneously by one screw or regulating means.

In theaccompan ing drawings ,;which serve to illustrate an em odlment of the invention, Figure 1 is a front elevation of the scale with the dial-plate partly broken away in order to disclose the interior mechanism. Fig. 2 is a vertical section of the scale, taken at line in Figs. 3 and 4 are sections taken at line and w in Fig. 1, the former looking upward and the latter downward. Fig. Eiillustrates a slightly-modified construction. 7

Referring primarily to the first four figures of the drawings, 1 designates the casing, con- .taining the mechanism; 2, the eye or loop thereon for suspending the same; 3, the dial or plate bearing the numerals, and ,4 the frame in the casing for carrying the scale mechan- ISIII.

5 is a slidable draw-bar which. carries the load L to be weighed, and to the upper end of this baris pivotally coupled a rack 6, which plays upand down in a keeper 7 on the frame.

' The teeth of the rack gear with a pinion 8, re-

tatively mounted in the frame, and the arbor of this pinion carries a hand 9, which trav- Specificationof Letters Patent.

Applieation filed-December 31, 1904. Serial No. 239.206.

Patented Feb. 6, 1906.

s rin -levers 1 3 fulcrumed atl4 on the frame.

At'their inner and adjacent ends the other I arms of the levers 1 3 are coupled, respectively, to a rcgulatingdever 15 b links 16, and this regulating-lever is couple tov a bar orrod- 17, which is coupled at its lower end to an adj usting or tare-regulating screw 18 in the casing. The operation will 'be readily understood. Suppose that a pan, for example, be suspended from the hook 19 to receive, the load to be weighed and that this brings the hand 9, say, to the mark on thcdial indicating one pound. The hand may be readily brought to the zeromark by means of the screw 18, which actssimultaneously to elevate to an equal extent the two weighing-sprin s 11. 1 Fig. 5 shows a'slight y-different construction for effecting the same object and one that operates on the same principle. In this construction the mechanism of the scale which is obscured by the lower part of the dial will be the same as that seenin Fig. 1; but the slight difference between the two construc tions is clearly shown above, where the dial is broken away. 1 is the casing, which in this case also performs the functions of the frame 4, and 13" represents the spring-levers, .fulcrumed at 14 and having a somewhat L shape. The shorter arms 13 of the levers 13* extend upward, and above them are fulcrumed at the same point 20 two levers 21; The corresponding pendent arms of the levers 21 take betweenand bear on the respective shorter of these latter 'are spread by the screw 18.

The levers 21 are also crossed, so that when p the screw 18 spreads one pair of arms there of the other pair of arms thereof will also spread. In order that the screw 18 may be driven in horizontally, the levers 21 are bent into an. L shape; but this is not essential to,

the invention. a

The coupling-links 12 in Fig. 1 form parts of the spring-levers 13 in substance, but are not really essential, as the movements of the levers will notbe great.

TOO

It is not new, broadly speaking, to employ a plurality of springs in a spring-scale, and a screw and wedge have been employed as a tareregulating means for elevating the springs; but this form of tare-regulating means has not been found sufiiciently delicate and accurate for spring-scales, as it is very diflicult to elevate both springs to exactly the same extent, and unless this is done the adjustment will produce an inequality in the tension of the two springs. With the present construction the two springs will always be manipulated alike. Y

Having thus described my invention, 1 claim 1. A spring-scale, having two distensible spiral springs which support the load, two

alike spring-levers, one arm of each being coupled to the upper end of its spring, a tareadjusting screw, and lever mechanism between said screw and the other arms of the spring-levers for simultaneously, and uniiormly lifting both springs to regulate the tare.

2. A spring-scale, having a plurality of like distensible spiral springs which sup ort the load, like spring-levers, one for eac spring and each having an arm coupled to its spring,v

a regulatinglever, links 16, one for each spring-lever, said links being coupled at a common point to the regulating-lever and at their other ends to the respective spring-la vers, and means for adjusting the regulatinglever to bring the hand to zero on'the dial.

3. A spring-scale, having a draw-bar from which the load is to be suspended, a cross head on said bar, two like, distensible upright springs coupled below to said crosshead, two spring-levers, one arm of each of which is coupled to the upper end of one of said springs, and means for rocking or turning said spring-levers simultaneously about their respective fulcrums, for raising and lowering the springs said means comprising an intermediate lever, connecting-links, a screw, and a bar between said screw and regulatinglever.

4. A spring-scale, having a draw-bar from which the load is to be suspended, a distensible coiled spring for weighing, coupled at one end to said draw-bar, a spring-lever, one arm of-which is coupled to the other end of said spring, a tare-adjusting screw, and means between said screw and the other arm of the spring-lever, for operating the last-named lever through the medium of the screw, said means comprising an intermediate lever and connecting-bar.

5. A spring-scale, having a draw-bar from which the load is to be suspended, said bar being provided with a cross-head, two upright weighing-springs 11, coupled at their lower ends to said crosshead, two spring-levers 13, provided with links 12 which couple an arm of each spring-lever to the upper end of its respective weighing-spring, a regulating-lever 15, links 16 which couple the other arms of the respective spring-levers to said regulating-lever, a tare-regulating screw 18, and a bar connecting said screwwith said regulating-lever.

In witness whereof I have hereunto signed my name, this 28th day of December, 1904, in the presence of two subscribing witnesses.

OTTO C. WVIESE.

Witnesses:

HENRY \CONNETT, WILLIAM J. Fm'rn.

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