US242086A - Adjusting-scale - Google Patents

Description

(No Model.) I I 3 Sheets-Sheet 1. A. WESTBRMAIER. Adjusting Scale.

NO; 242,086. Patented May 24,1881.

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A. WESTBRMAIER, Adjusting Scale. v No. 242,086. Patented May24, i881.

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(No Model.) 3 Sheets-Sheet 3.

A. WESTERMAIER.

w Adjusting Scale. No. 242,086. Patented May 24,1881.

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UNITED STATES PATENT OFFICE.

ADOLF IVESTERMAIER, OF PHILADELPHIA, PENNSYLVANIA.

ADJ USTlNG-SCALE.

SPECIFICATION forming part of Letters Patent No. 242,086, dated May 24, 1881.

Application filed February 528, 1881. (No model.)

To all whom it may comer-21,:

Be it known that I, ADOLF WEs'rERMAIER, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Scale-Balances, of which the following is a specification.

My invention relates to certain improvementsin what are known as adjuslingscales or balances, one object of my improvements being to effect, by a single movement of the hand, the elevation of the scale-beam hanger and the operation of the tray-supporting pins; and a further object is to so secure the knife edged fulcrum and hanger-bars to the scalebeam that said bars can be readily adjusted, applied, and removed.

In the accompanying drawings, Figure 1, Sheet 1, is a plan view of the scale; Fig. 2, a front view of the same; Fig. 3, Sheet 2, a transverse vertical section; Figs. 4, 5, and 6, Sheet 3, diagrams illustrating one of the feat tures of my invention; and Figs. 7 to ll, inclusive, enlarged views of parts of the scalebeam and bearings.

A is the base of the scale, mounted upon suitable feet at the corners and having a tubular column, B, through which and through an opening in the base passes a rod, D. To the upper end of this rod is secured a plate, E, carrying bearings a a for the fulcrum-bar Z) of the scale-beam F, from the opposite ends of which are suspended the trays G G, the scalebeam being furnished with the usual pointer, H, serving, in conjunction with a graduated plate on the column B, to indicate any deflection of the scale-beam from a horizontal line.

The elevation of the rod D and plate E, carrying the scale-beam, is effected by means of a lever, J, hung to suitable hearings on the under side of the base A, the lower end of the rod resting on the inner end of the lever, and the outer end of the latter being provided with lugs carrying the pivot-pin of a supplementary lever, M,which rests on the top of the lever J, and is maintained in line with the same by means of a spring, d. Pressure exerted upon the outer end of the lever M causes the opera tion of the lever J and the raising of the rod D until the inner end of said leverJ comes into contact with the stop 0 on the base, when the motion of the lever is arrested, and further pressure applied to the outer end of the lever M causes the spring (I to yield and permit the operation of said lever Mindependently of the lever J.

The innerend ot' the lever M carries a bent rod, j, which acts in the manner described hereinafter upon the weighted arm 9 of a rockshaft,N, the latter being adapted to hearings on the under side of the base A, and having arms 71, which act upon pins Ladapted to openings in the base, one of said pins being arranged beneath one of the trays G, and the other beneath the opposite tray.

Vhen the scale is at rest the parts are in the positions shown in Figs. 2, 3, and 4, the trays resting upon the base and in contact with the tops of the pins 2', the lower ends of which are in contact with the arms h of the rockshaft N. On depressing the outer arm of the lever M the lever J is caused by the spring (1 to move with the same, and the rod D is elevated, thus lifting the scale-beam and the trays. The pins 2' follow the latter, owing to the action of the weighted arm g on the rock-shaft N, said arm being free from the control of the rod fot' the lever M, as shown in Fig. 4E. The pins are thus maintained in firm contact with the trays, and the latter are held steadily in position until the scale-beam has been elevated to the proper height a point determined by the contact of the inner end of the lever J with the stop 0, as shown in Fig. 5. The rod f is now in contact with the arm g of the shaft N, and further pressure upon the outer arm of the lever M causes the elevation of said rod and the arm g and a vibration of the shaft N, so as to move the arms h downward and permit the descent of the pins 1', the trays G being thereby promptly freed from the control of the lat ter, and the free swinging of the scale-beam permitted. On removing the pressure from the outer end of the lever M, the operations above described are reversed, the pins 1 being first elevated so as to strike the bottoms of the trays, and the said pins and the rod D being then simultaneously lowered until the trays rest on the base A. By this means the scalebeam is held in a horizontal position during the time that it is being raised and lowered, the indicator H pointing to the zero-mark on the graduated plate during such movements.

The plate E has a rod, P, passing through an opening in the base A, and serving to aid in steadying the movement of said plate.

The ends of the fulcrum-bar b on the scalebeam F are adapted to yokes m m, secured to said beam, and are held in position in said yokes by set-screws a a, Figs. 7 and 8, so that the bar can be readily applied to or removed from its place, and can be adjusted to any desired position in the yokes.

Each of the trays G is suspended by bars 2) from a plate, 8, which is adjustable vertically on a screw-rod, 8, connected by means of a universal joint, t, to a yoke, 10, the latter being suspended from a knife-edged bar, a on the end of the scale-beam, so that the trays are free to swing in any direction. The barw is held in place on the beam F by plates y y, the inner edges of which are adapted to the opposite inclined sides of the bar, the outer ends of the plates having inclined recesses adapted for the reception of the beveled heads of set-screws v, and a slot in each plate being adapted for the reception of the stem of a set screw, v, the head of which bears upon the top of the plate and serves to retain the latter in its proper vertical position. Lateral adjustment of the bar 00 is effected by loosening one of the set-screws e and tightening the opposite set-screw, the action of the beveled heads of the screws on the inclined ends of the plates causing the desired adjustment. Thus outward movement of the bar is effected by loosening the outer screw and tightening the inner screw, and inward movement by a reverse operation.

It will be observed that the lever M acts simply to lower the pins 6, the elevation of said pins being effected by the weighted arm 9, so that the pins rise in contact with the trays, and the steadiness of the latter is thereby insured.

I claim as my invention 1. The combination of the scale-beam and trays, the vertically-movable hanger, the tray supporting pins 2', the roek-sl1aftN,\vith arms h, and weighted arm g, and the duplex lever J M, as set forth.

2. The combination of the scale-beam, the knife-edged fulerumbar b, the yoltes m, and the set-screws a, as set forth.

3. The combination of the knife-edged bars 00, the scale-beam F, the coi'liining-plates y, having beveled ends, the adjListing-screws o, and the retaining-screws v, as set forth.

In testimony whereo'fl have signed my name to this specification in the presence oftwo sub scribing witnesses.

ADOLF WESTERMAIER.

Witnesses:

A. R. HERMAN, HARRY SMITH.

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