USRE5901E - Andrew tuenbull - Google Patents

Description

A. TUR NBULL. Spring-Scales.

Reissued June 2,1874

Ulvrrnn S ATE ANDREW TURNBULL, OF NEW BRITAIN, .ooNNEorIoU'r, ASSIGNOR, -BY MESNE 1 PATENT OFFICE;

ASSIGNMENTS, 'ro LANDERS, FRARY, AND oLAEK, or SAME PLACE.

- '1 mmovrmsmm SPRING-SCALES?- Specification forming part tr Leticia Patent no. 25.473, dated September 13, 1859; extended seven years;

reissue No. 5.961, dated June 2, 1874; application .filed February l1,1874.

To all whom "it may concern:

Be' it known that I, ANDREW .TURNBULL, of New Britain, in the county of Hartford and State of Connecticut, have invented anew and Improved Weighing Device, the same being a combination of what are generally known as the spring-balance and'the counter-scales and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which Figure 1 is a side iew of. my intention, a portion of the casing being removed. in order to exhibit the internal mechanism; Fig. 2.-'a

horizontal section of the same, taken in the line 4v w, Fi g. 1.

Similar letters of reference indicate correspondin g parts in the two figures.

- The object of this invention is to obtain a weighing device by which articles may be weighed accurately and with facility, the adjustment of poise-weights dispensed with, and,

at the same time, one that ,will admit of being used on a counter, as the ordinary counters'cales. The invention consists in'combining a spring-balance with the scoop-platform, by means substantially as hereinafter described,

whereby the desired end is attained,

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it. Arepresents a'hollow conical base, through the upper end or apex of which an arbor, B, passes, thedower end of said arbor being connected to the ihterior of the base by a link, a.

0n the upper end of the arbor B a scoop platform or frame, (3, is placed to receive a scoop, 1), of the usual the upper end of the arbor there is a crossor any proper form; and near bar, E, which 'is 'providedat each end with an eye, I). These eyes b b are fitted on bearings c c atthe outer end of the lever; F, the outer endof said lever being divaricated, as shown clearly in Fig. 2, so as to extend around the arbor B to opposite sides at points adjoining the eyes I). The fulcrum of the lever F is formed byhaving two projections, c cone at each side of the inner extremity of the divaricated portion of the lever. These projecfreely in the base A, the link a serving as a guide, as usual. .To the lower parts of the uprights G G plates H H are attached-one to each. These plates project out from the uprights G, and each has an upright shell, I, at its outer end. These shells are connected together by screws or bolts, and form a box or case into which the inner end of the lever F passes", and'isal'lowedfo work treelyup and down therein. Within-the case formed bythe shells II an arbor, d, is placed transversely, and has a pinion, e, fitted on it. Into this pinion a rack, J, gears, said rack being attached to the inner ends of the lever F by a pivot, f, onwhieh the rack J is suspended loosely, the rack being kept in gear with the pin on by a spring, g, attached to the upper edge of the lever F. To the inner end of the lever F one end of a spiral spring, K, is attached. The opposite end of this spring is attached to'a screw, L, which passes through a transverse bar, it, in the lower part of the case formed by the shells I I, the end of the screw having a nut, i, on it, as shown clearly ih Fig. 1. To the outer side ofeach shell I a graduated circular plate, M, is attached, and

on each end of the arbor d an index, N, is secured, said arbor passing through the centers of the plates M. The indexes ,N pointout on the plate M the degree of tension to which the spring K is. subjected when the outer end of the lever F is depressed by the article to be weighed, and, consequently, the weight of the articlein the scoop isindioated by the indexes.

arbor and undue tension of spring-K. By

the employment or use of tivo indexes and graduated plates, MM-one at each side-the dcvicewill not require to beturned around in any case, as the weight will-be indicated at both sides.' Byli'aving'one end of the spring K attached by the'screw L'andnuti to .the

transverse bar It, the spring K, in case of be- 'coming weak, may be strained by screwing up the nuti, and. kept at a uniform tension. By having the rack-J attached bya pivot, kept in gear with the-pinion e, byaspring g, compensation is made for wear and anyirregularity or inaccuracy in the rack or pinion, and the device will operate much more correctly than if the rack were rigidlyattaehed.

The arbor B, with scoop-platform 0 attached, and guide-link 09, together with the. lever" F,

are old and well-known devices; andldo not clailnfsaid parts; but

VI 'do claim as my invention-'- 1; The combination of the scoop-platform G, the arbor B, and lev'er F with the spring K, rackJ, pinion e; and index or indexes N attached to its arbor d, and traversing oyer a graduated plate or plates, substantially as and 'for the purpose set forth.

2. The combination of the rack J, spring 9,

and pinion e, substantially as and for the purpose set -forth.

3. I The combination of the transverse bar'h;

nut i, screw L, spring K and movable arm F, substantially as and for the purpose set forth.

4. In combination withthe beam-lever F, spring K, and 'indexes'N; connected withi the lever, the stop j on the arbor B, as and for the purposes specified.

, 7 ANDREW TURN'BU'LL. Witnesses: I r l J. G. Arrwoon;

- 3.. B. H mrrm.

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