US2191635A

US2191635A - Balance

Info

Publication number: US2191635A
Application number: US82553A
Authority: US
Inventors: Melvin H Van H Battenberg
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-05-29
Filing date: 1936-05-29
Publication date: 1940-02-27
Anticipated expiration: 1957-02-27

Description

Feb. 27, 1940. M. H. VAN H. BATTENBERG 2,191,635

BALANCE Filed May 29, 1936 Jew Patented Feb. 27, 1940 UNITED STATES! PATENT OFFICE This invention relates, to improvements in. bal-' ances for weighing, and one of the objects of the invention isv to, provide a conveniently portable balance, which, is particularly adapted, though i 5; not necessarily limited in its use, for weighing the small beads or buttons of: metal produced in blowpipe, or similar assays, and also grainsor fragments of metal found in panning. by prospectors, with sufficient accuracy to permit a rea- L0,: sonably close estimate of value in the field.

A further object is to provide in a balance of this character improved means permitting adjustment or refinement, with variations in size,

for the higher accuracy desired in laboratory de terminations, particularly in checking rider weights against each other or against a rider weight of standard value.

as will appear, the invention consists in the features of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawing- 5. illustrating this invention, and inwhich Figure 1 is a side elevation, partly broken away,

of an improved balance of this character constructed in accordance with the principles of this invention.

Figure 2 is a top plan view of Figure 1. Figure 3 is an end elevation of Figure 1. Figure 4 is a view-taken online 44, Figure 2, on an enlarged scale. Figure 5 is a detailjperspective View, partly 8 broken away, showing the central portion of the balance and the supporting fulcrum, on an enlarged scale. Y

Figure 6 is a detail perspective view of one of the Vernier plates. Allv Figure 7 is adetail perspective view of one, of

' the supporting blocks for the Vernier plates.

Figure 8 is a detail perspective view of, a rider weight,

The balance consists essentially of a beam I0 which is preferably solid and is of any desired size and configuration, but is preferably round in cross section so as to permit of an easy placement and adjustment of a rider weight H thereupon.

At each end of the beam there is" preferably, I59v provided a depression I2 which may be off any desired depth and configuration but is preferably conical and forms a pan or receptacle toireceive andautomatically center the object to be weighed arranged any desireddistance apart, but the beam is preferably graduated into tenths on either side of the center of the-beam, the last graduation on each side of the center or adjacent the extremities of the beam' being formed by the depression I 2.

The numeral M designates a bearing bar which is provided with a knife edge l5 at the bottom thereof and a rounded surface 16 at the top thereof, andthis construction is preferable as'the distribution of weight affects the balancing, the radius of the curved top being preferably struck from the knife edge.

The bearing baris provided with a depending v portion 11- having; an opening 18 therethrough and through which opening the beam l9 passes,

, a the opening I18 being of a size that the beam will To the attainment of these ends and the -accomplishment of other new and useful objects closely fitthe san e, and the beam and the bearing bar are secured; together in any suitable manner, such as by means of a screw 19 passing through the bearingbar and contacting the beam. Anut or; collar 20: is threaded upon the screw l9 and the latter projects for, any desired distance above. the bearing bar so that the nut or collar ZB-may be adjusted, vertically with respect to the lit screw [9; and thereby vary or control the locatothe length of the beam and extends for any desired distance on, each side thereof, the knife edges on each side of the beam being located centrally with respect to the beam and also centrally with relation to-the height. or diameter of the beam.

Passing also throughthe depending portion I! of the bearing bar, directly below and parallel with the beam H), a bar or member 2|. having threads thereon and this threaded bar, screw or member 2| passes through a threaded opening 22 in the depending portion, ll of the bearing bar and may be provided at one end with a seat 23 for the reception of a tool or implement for rotating the bar 2| so as to adjust the latter in the direc-l tion of its longitudinal axis and also lengthwise of the beam l0, so as to properly balance the beam, the member 2lserving as a counter-balancing screw for balancing the beam on its knife edge l5 as a check on the construction and workmanship;

When assembling the balance, the bearing bar l4 carrying the knife edge [5 is assembled first with respect, to the beam 10 with the means for adjusting its balance. The set. screw I9 is then placed in position and adjusted to bind the beam and bearing bar together. The nut or collar 20 is then adjusted, after which the counter-balancing screw or member 2| is adjusted.

Connected to each of the ends of the beam ID, in any desired or suitable manner, is a Vernier plate 24, here shown as having a portion of the plate seated in a bifurcation in the end of the beam, and a fastening device such as a rivet or other fastening means passes through the walls of the bifurcation and through the Vernier plate 24.

The numeral 25 designates a fulcrum block.

which is preferably provided with two laterally spaced pillars 26, the tops of which are preferably hard and polished, and on these polished surfaces the knife edge ll: of the bearing bar l4 rests when the balance is set up for use.

On the Vernier plates 24 at the ends of the beam are graduations 21 and which graduations are preferably spaced in sixteenths of an inch, and an indicating central pointer or indication 28 is provided on the Vernier plates to indicate the points on either side of which the reading is to be taken.

The fulcrum block 25 is mounted upon a base 29 of any suitable construction and the two are secured together in any suitable manner as by means of fastening screws 30.

At the end of the base 29 and in proximity to the Vernier plates 24 at the ends of the beam It, are arranged stationary Vernier plates 3|, which are preferably provided with a base 32 by means of which they may be secured to the base 29 through the medium of fastening or anchor screws 33, and interposed between the base 32 oi each of the Vernier plates 3| and the base 29 is a resilient element 34, such as rubber or the like. The purpose of these resilient elements is to permit of a little variation in the elevation of the Vernier plates 3| at the ends of the base 29 and in proximity to the Vernier plates 24, to bring the indexed graduations 21 on the Vernier plates 24 at the ends of the beam in line with the graduations 35 on the plates 3|, and this may be accomplished by adjusting the anchor or fastening screws 33.

Obviously, spring metal or any other suitable means of adjustment may be provided to accomplish this result.

The graduations 35 on the stationary Vernier plates 3! are disposed radially from the line of contact of the knife edge l5 of the bearing bar upon the fulcrums 26 and the spacing of the graduations 35 on the Vernier plates 3i are preferably in twelfths of an inch, while the spacing of the graduations 21 on the Vernier plates 24 at the ends of the beam are preferably in sixteenths of an inch, both at the contacts ends of the lines or graduations where they are read off. A central indicating mark or character 36 is also provided on each of the stationary Vernier plates 31 to indicate the point from which the readings are made on one side or the other of the indication 36.

Obviously, the Vernier plates at the ends of the base may be graduated as desired, as may also the Vernier plates at the ends of the beam, and

the device may be made to read as closely as the workmanship will permit.

In the present exemplification of the invention,

however, the Vernier graduation is roughly represented as four divisions on the beam end equal to three on the stationary Vernier plates, which will read to one-quarter of a division on the stationary plate. If the beam is balanced and adjusted to move one division on the stationary plate for onetenth of a milligram, it is possible, with the vernier to read to one-quarter of the tenth, or onefortieth of a milligram.

The adjustment for balancing the beam is made by varying the position of the counterbalance screw or member 2 l, and by varying its size and Weight the relations of the beam and counterbalance may be adjusted so that the beam will be deflected a given distance by a given weight in the pan or cavities I2, or by a rider weight on the beam. Obviously, the nut or collar 28 may be adjusted upon the screw l9 to vary the center of gravity vertically of the assembled beam, after having established its center of gravity horizontally by the screw or member 2|, and thus vary the movement of the beam as delicately as workmanship will permit.

The movable Vernier plates 24 at the ends of the beam, as well as the stationary Vernier plates Eli are graduated to read either way respectively from the

index lines

28 and 36, and together they constitute what is termed a folded Vernier".

While the preferred form of the invention has been herein shown and described, it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is:

l. A balance for Weighing, embodying a beam, and Vernier graduations at both ends of said beam.

2. A balance for weighing embodying an oscillatory beam, Vernier graduations at each end of the beam, a stationary plate at each end of the beam, and Vernier graduations on said plate adjacent which the Vernier graduations at the respective ends of the beam are adapted to be read, one of the graduations on each of the plates marked as an index or pointer whereby a weight may be read by the oscillation of the beam and at each end of the beam.

3. A balance for weighing embodying a beam, a bar through which the beam passes, said bar extending for a substantial distance on opposite sides of and being disposed at right angles to the beam, knife edges in said bar, a vertical screw threaded into the bar to engage the beam and extending for a substantial distance above the beam, and a weight threaded upon said screw and vertically adjustable thereon with respect to the beam, for varying the vertical center of gravity of the assembled beam.

4. A balance for weighing embodying a beam, a bar secured to the beam for adjustment length- Wise of the beam and projecting beyond both sides, of the beam and at right angles thereto, knife edges on the bar for engaging a fulcrum, Vernier graduations at the ends of the beam, rider weight graduations on the beam extending lengthwise thereof on opposite sides of the knife edges, a stationary plate adjacent each end of the beam, Vernier graduations on the plates against which the Vernier graduations at the respective ends of the beam are adapted to be read, and recesses in the beam constituting receptacles for the article to be weighed.

5. A balance for weighing embodying a beam, a bar secured to the beam for adjustment lengthwise of the beam and projecting beyond both sides of the beam and at right angles thereto, knife edges on the bar for engaging a fulcrum, Vernier graduations at the ends of the beam, rider weight graduations on the beam extending lengthwise thereof on opposite sides of the knife edges, a stationary plate adjacent each end of the beam, Vernier graduaticns on the plates against which the Vernier graduations at the respective ends of the beam are adapted to be read, and recesses in the beam constituting receptacles for the article to be weighed, the Vernier graduations on said stationary plates being dispesed radially with respect to the point of the beam formed by said knife edges on said fulcrums.

6. A balance for weighing embodying a beam, a bar secured to the beam for adjustment lengthwise of the beam and projecting beyond both sides of the beam and at right angles thereto, knife edges on the bar for engaging a fulcrum, Vernier graduations at the ends of the beam, rider weight graduations on the beam extending lengthwise thereof on opposite sides of theknife edges, a stationary plate adjacent each end of the beam, Vernier graduations on the plates against which the Vernier graduations at the respective ends of the beam are adapted to be read, cushioning means beneath each of said stationary plates, and

fastening means passing through the base of each of the stationary plates, said cushions, and into a support whereby the vertical position of said stationary plates may be varied at will.

'7. A balance for weighing embodying a beam, a bar secured to the beam for adjustment lengthwise of the beam and projecting beyond both sides of the beam and at right angles thereto,

knife edges on the bar for engaging a fulcrum,

' spective ends of the beam are adapted to be read,

and recesses in the beam constituting receptacles for the article to be weighed, the Vernier graduations on said stationary plates being disposed radially with respect to the pivot point of the beam formed by said knife edges on said fulcrums, the Vernier graduations at the ends of said beam being arranged on plates and said plates being secured to the ends of the beam and extending for a substantial distance above and below the beam.

MELVIN H. VAN H. BATTENBERG.