US661158A - Balance. - Google Patents

Description

No. 66H58. Patented Nov. 6, |900. C. H. STUELTING G. C. E. LINEBARGER.

BALAN CE.

(Appliwinn am June 1a, 1900.)

(No Model.) d

, MZW/ @6 UNITED STATES PATENT OEEIcE.

CHRISTIAN H. STOELTING AND CHARLES E. LINEBARGER, OF CHICAGO, ILLINOIS, ASSIGNORS TO THE CHICAGO LABORATORY SUPPLY AND SCALE COMPANY, OF SAME PLACE.

BALANCE.

SPECIFICATION forming part of Letters Patent No. 661,158, dated November 6, 1900.

Application filed J'nne 18, 1900. Seria-1 No. 20,651. (No model.)

T0 (all IIJ/1,0m it may con/cern.

Be it known that we, CHRISTIAN H. SroELT- ING and CHARLES E. LINEBARGER, citizens of the United States, residing` in the city of Chicago, county of Cook, and State of Illinois, have invented a newand useful Improvement in Balances, of which the following is a specincation.

Onr invention relates to that class of balancesknown to the art as spring-balances,77 and has particular reference to that class of spring-balances commercially known as the Jolly balance. The art of this class of balances presents at the present time some marked disad vantages. The inability to control the vibration of the spring gives great annoyance. The placing of a weight in the pan subjects the spring to vibration which on account of the delicacy of the spring is extremely difficult to check. Then in the reading of weights accuracy is dii'licult to attain. The movement of the spring is downward and presents no opportunity to control its action. The operatoris obliged to take his readings by sighting across the weighing-pan to graduations on the supporting-standard of the balance, and as the pan swings free of this standard accuracy of reading cannot be secured. It is our object in this invention to provide against these disadvantages. While the present Jolly balance consists of a spiral spring suspended from an arm projecting from an upright standard and the lower end of the spring moves downward when weight is attached io it, we reverse this 'principle and stretch the spring upward, holding the lower end stationary, or nearly so, and at a fixed eievation. VV'e are thus enabled to minimize the vibration of the spring and provide a means for taking readings of measurements with great accuracy. Further, we economize time in the operation ol the balance and prevent any injury to the spring by reason of a sudden strain occasioned by the application of heavy weightto the weighing-pan.

Our invention is described particularly herein, reference being had to the annexed drawings.

Figure l represents a general view of our balance. Fie. 2 represents a vertical sectional View ofthe balance-standard, showing the actuating mechanism of the balance. Fig. 3 is a cross-sectional view of balance-standard, taken through the dotted line .ry, lshowing detail View of lower )art of balance-siandard. Fig. 4f is a detailed drawing of the sgn'ing-controlling device. Fig. 5 is a detailed drawing of the graduatious for taking readings ol" weights.

Particularlydescribed, A is the base of the balance, made of any desirable form.

d ct represent set-screws intended to level the base A.

B represents the supporting-standard of the balance and is connected at its lower end with the base A by means of the bolt b of Standard B is in form a tube, into which telescopes a graduated tube C. Extending at right angles from the top end of the tube C is an arm D, from which is suspended the spiral spring E, held iu connection with the arm D by means oi' thumb-screw d, and which spring is well known in the trade as the Jolly spring. Suspended from this spring is a narrow metal strip I?, having armsffextending at right angles from either end, which strip is secured between the spring E and lthe weighing-pans II II and forms, in connection with the short tube G, a means for limiting the vibration of the spring E. The tube G is adjustably secured to the standard B by means ol' the bracket I, the set-screw 'i securing the bracket to the standard B and the set-screw t" binding the tube G within jaws of I. The metal strip F is designed to swing within the tube G, which is shorter than the distance between the crossarms The diameter of the tube G is less than the length of the cross-arms fj', and by reason of the inability offf to pass through the tube G the action of E is limited.

The Vactuating mechanism is shown in the sectional view of the standard in Fig. 2. It

consists of the sprockets K and K', which are secured one within and near either end of the standard The sprocket K is Fitted with a shaft lt, which is journaled in opposite sides of the standard B. The sprocket K' turns on an axle 7a', which is secured at its terminals in opposite sides of the standard B. Around the sprockets K. K is passed an endless chain IOO L. This chain L is secured to the grad uated tube C by means of the screw Z, which passes through one of the links of the chain into the side of the tube C. Fitted upon the end of the shaft lt and without the standard B is the knurled head J. By turning the head J with the lingers the sprocket K is revolved, the chain moved, andthe graduated tube C raised or lowered. ln opposite sides of the tube C and registering with the axle 7u' are cut two slots, one of which is shown at c. These slots c limit the action of the tube C. The axle k lying within the slots checks the upward movement of the tube C when the lower end of the slot comes against it.

The tube C is graduated throughout its` length. Attached to the upper end of the standard B and lying in close contact with the graduations c oi' tube C is a Vernier b', and in the registering of this Vernier with the grad nations c' the reading of weights or measurements is taken. Upon the metal strip F is an indicating-mark f, designed to register with a similar mark f/ on the tube G. We prefer to forni this indicatingmark j" by coloring a portion of the metal strip Fand allowing the line of demarcation between the colored and u ncolored portions to serve as the indicating mark f'. This may be accomplished, however, in many ways. The indieating-mark g may be formed by scratching the surface of the tube G or by any other suit.- able means. We would not be limited in forming;` these indicating-marks to the particular descriptions herein.

Adjustably secured to the standard B by means of the screw m is a bracket M, designed for the support of a vessel of water in which the weighing-pans H H are submerged in the taking of specific gravities and for other special purposes in the use 0f the balance.

The operation of the balance may be described as follows: By means of the Setscrews ct a the balance is leveled, so that the metal strip F will swing free of the sides of the tube G. Then the object to be weighed is placed in one of the paus H I-l. Byoperation of the head J with the fingers the tube C is moved and the spring E is stretched upward until the lower end of the spring swings freely and the indicatingmark j" of the metal stri p registers with the mark g on the tube. Then the reading is taken at the register of the Vernier b with the graduations c.

We would not be limited in our invention to the specific device herein described. Any

suitable style or form of device for elevating the upper end of the spring may be used and any style of device for the limitation of the Vibration of the spring E.

Our balance is preferably constructed of metal; but any other suitable material may be used.

The tube G we prefer to make of glass or other transparent material; but it may be constructed of any other desirable material.

What we claim as our invention isl. A spring-balance consisting of a base, a perpendicularly-proiectiug tube-standard, a tube telescoping within the standard, means for sliding the telescoping tube within the standard, an arm projecting horizontally from the top of the telescoping tube, a spiral spring suspended from the arm, a weighingpan suspended to the lower end of the spring, and means for limiting the Vibration of the spring, substantially as described and for the purposes herein set forth.

9. ln a .lolly balance, means for controlling the action of the weighing-spring, consisting of a narrow strip of metal having arms projecting` at right angles Afrom either end, which is suspended from the lower end of the weighing-spring and between the spring and the weighingpan, which metal strip swings freely within a short tube, adjustably secured, by means of a bracket, to the supporting-standard of the balance, the tube being` shorter than thedist-ance between the arms projecting from either end of the metal strip, and which projecting arms may -not pass through the tube, substantially as described, and 'for the purposes herein set forth.

3. ln a ,lolly balance, means for reading weights consisting of a lgraduated tube supporting the weighing-spring, having` telescoping engagement with a tube-standard projecting upward from the base of the balance, the graduations on the tube registering with an indicator secured to the upper end of the standard, au indicator secured to the lower end of the weighingspring, and between the spring and the weighing-pan, an. indicator projecting from the standard which is made to register with the indicator secured to the weighing-spring` by raising or lowering the graduated tube carrying the -weighing spring and pan, substantially as described, and for the purposes herein set forth.

CHRISTIAN H. STOELTING. CHARLES E. LINEBARGER. l/Vitnesses:

HUGH H. HA'DLEY, M. B. MILLER.

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