US107286A - Improvement in registering weighing-scales - Google Patents

Description

HPADDOCK.

Pendulum Scales.

No. 107,286. Patented Sept. 13, 1870.

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HAIR-IHN PADDOCK, 0F ST. JOHNSBURY, VERMONT, ASSIGNOR TO HIM- SELF ANI) FRANKLIN FAIRE/INRS', Oli" farill PLAGE.

.Letters Patent No. 107,286, dated September 13, 1870.

IMROVEMENT IN REGISTERING WEIGHING-SCALES.

The Schedule referred to in these-Letters Patent and making part o the same.

To all ywhom 'it '1n-tty concern.'

Be it known that I, HAnvmX IMmoon, of St. Johnsbury, in the county of Caledonia in the State of Vermont, have invented certain new and useful Improvements in \Veighiug-Scales; and I do hereby doclare that thc-following is a full and exact description thereof.

My invention relatos to registering the amount of the weight and adding together the several amounts or the amounts of the surplus over and above that indicated by a poise on a beam. It is entirely automatic in its action, and is cheaply constructed and very simple.

I will describe a mode of carrying out my invention which I have put in practice successfully, and will afterward designate the points which I believe to be new therein.

v The accompanying drawing forms a part of this specification.

Figure l is a front elevation, with a portion ot' the dial broken away to show the mechanism in the rear.

.lhe additional gures represent sonic ot' the details.

Figure 2 is an end view, and

Figure 3 is a vertical section.

Similar letters of reference iudieateAlilte partsrin all the figures.

A is a beam corresponding to the ordinary weigh` ing-beam of a platform or analogous style of scales.. The provisions for attaching the weight thereto, connterpoising, d'1, may be ot' the ordinary description, and need not be set forth in detail.

Ilhc drawing shows the novel parts, with so much of the ordinary parts as is necessary to indicate their relation thereto.

On the right-hand extremity of the beam A is a knife-edge, A', which receives a link, I), connected, as

represented by the coupling D1 D2, to a pin, El, on a bent lever, E, turning ou a fixed center, c, and carrying, at its other extremity, a weight. I terni this loaded arm a gravity-lever.

It carries a point, El.

The material to be weighed being placed upon the platform or in` the scale-pan, not represented, the strain due toits weight tends to lift the. beam A, and, consequently, the knife-edges A', with a corresponding force.

lhis force being transmitted, Ythrough the conncc tion D D1 D2, to the point E2 on the gravity-lever E, swings this lever to the right, and, eonsequentl y, raises its center of gravity to a certain extent. The resistance due to the turning of the gravity-lever E in this manner increases as its motion increases.l At the commencement 1t hangs in nearly a perpendicular position, anda slight lifting force received from the beam A will incline it out of its perpcmlicular posit-ion, or,-

in other words, will cause it to swing or more a little to the right, and come to rest in anew position. Any increase in the load upon the platform (or in the sealepau) will cause an increase in the detiection of the gravity-lever F. Thus, at each weighing operation,

he beam A rises to a certain extent a-nd causes a corresponding change of position of the loaded lever I. Then the weight upon the platform is great, the beam A will rise higher and will lift the gravity-lever E higher than when the weight is light.

I provide a xed are of metal, M, and graduate it, as represented. This arc is fixed in a position parallel to the path of the point, but not touching it.

Now, by observing the position at which the point E'l comes to rest, and observing the figures upon the graduation corresponding thereto, on the arc M, I can determine approximately the amount of the charge being weighed.

A poise may be used upon the beam A in addition to the means here provided 'for ascertaining the weight, it' preferred. In such case my peculiar apparatus, operating by the force transmitted through the connection I) D D2, will take note only ofthe surplus of weight over and above that corresponding to the position of the ordinary poise upon the beam A.

I have provided, also, means for permanently registering the sum ofthe several amounts weighed, or the sum ofthe several surpluses above that indicated by the poise, when one is employed. I attach great importance to this registering feature of my invention.

The center or axis c, on which the gravity lever ll swings, is, in fact, a hollow tube or sleeve. It is divided into two parts.

A tine ratchet-wheel, Y, is mounted between them, upon a shaft, r, which is supported in the sleeves c e, and projects out in front and carries a gear-wheel, Y, which, by meshir A into the wheel X2, on the shaft a, turns the index X, which latter traverses over a properly-graduated disk, conveniently mounted for ready inspection.

A delicate spring-pawl, W3, is fixed on the lever E, as represented, and its end takes in ine ratchet-teeth on the periphery of the wheel V. It follows that each outward movement of the arm E gives a corresponding angulaimotion to the wheel V.

At cach return movement ot' the gravityle.er E the wheel Y and the wheel X2 and the index X are held stationary by a delicate pawl, Z, fixed upon the stationary part ofthe trame-work. v

lt will now be sccn that at each weighing operation the movement ot' thc point E'l along the arc M indicates the weight of the charge, and the position ofthe index- X on the dial indicates the sum of the weights of this and the precedingcharges; or, in ease a poise is used ou the beam A, it indicates thc sum of the several surpluses above that corresponding to the .position of the poise.

can take out the gravity-lever ll and its connections by simply slackening the screws Q, and lifting the sliding; pieces R, which titllowny on the bearing, as indicated. lhis facilitates repairs and adjustment.

I make all the bearings very narrow. lhey are, in fact, knife-edges, but do not perform the function usually performed by what are thus designated in ordinary weighing-machines, to wit, that ot' brniing an axis which will allow a small amount of angular motion without-any rubbing or friction; but they reduce the bearing surface very greatly, and thus diminish the ditlieulties due to the adhesion'ot rancid oil, or the like, when the surfaces are lubricated. Such bearings would not be serviceable where much strain is involved,

but tnd them peculiarly applica-ble in delicate mechanism, where, as in this case, the amount ot' angular motion very considerable, but the strain is light and the motions are not rapid or long continued.

The bearings ot' the coupling-hooks lV on the pin .l is similarly narrowed.

The hook-t'orin'ot` my coupling D2, and the hinge by which this part is connected to the part Di, allow of ready disconnection from the pin El, and, consequent ly7 from the gravity-lever ll and its connections, to allow the scale to be used in the ordinary manner by sinplyindicating the weight by a poise on the beam A.

I make the connection between the part D and the link l) by a serew-thread, as represented. 'lhis allows the connection to be lengtlicned and shortened at will by simply unhooking the part D2 from the pin El, and turning the former one or more times round in either direction. It may be observed, however, that this will not allow of delicate adjustment.

l claini- 1. A seltlacting registering mechanism adapted to register the weights ot' variable loads, in combination with a weighing-scale, when the action is automatic, additive, and self-returning. substantially as speeilied.

2. rlhe `gravity-lever, with pointer FP moving backward and forward on the graduation M, for indieatinr the weightof each separate load at the time while the weighinfjr is beingeffected, in combination with a. separate index and separate graduations or dial, serving,r to register the sum ot' the weights of the variable loads, all substantially as herein set forth.

3. The coupling l)lr D3, made hookformed and hinged tothe part l), and adapted for convenient connection and disconnection between the knife-edges A upon thebeam A andthe gravity-lever 1*) and its connections, when the beam-A is adapted to weigh by a poise thereon, and the part-s are so proportioned that the balance shall be correctly weighed both in the booked and unhooked condition, as herein shown and described.

1n testimony whereotI l have hereunto set myname in presence ot' two subscribing' witnesses.

HARVIJIN 'IPADDOCIL Witnesses:

lfnaNiimN liatnnaxks, 'luowts Scooxnn.

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