US2030666A - Scale - Google Patents

Description

Feb". 11, 1936. 'H, L, WALKER 2,030,666

SCALE Filed May 11, 1932 l3 INVENTOR.

HAROLD L. u/ALkER,

BY Dull, QM am ATTORNEYS.

Patented Feb. 11, 1936 UNITED STATES PATENT OFFICE- SCALE Harold L. Walker, Brooklyn, N. Y., assignor to The Jacobs Bros. Co. 1110., Brooklyn, N. Y., a corporation of New York Application May 11, 1932, Serial No. 610,559

4 Claims. (Cl. 265-69) This invention relates to a structurally and vention might be embodied (as will hereinafter functionally improved scale and aims to proappear) in scales of various other types. vide an article of this character which may read- Referring primarily to the rack bar l4, it is ily be manufactured and set up to furnish an well appreciated by those skilled in the art that apparatus functioning over long periods of time considerable diii'iculty has been heretofore exwith freedom from mechanical difliculty. perienced, due to binding tendency between the A further object of the invention is that of teeth of the bar and the pinion. This has been providing a scale in which weight indications caused usually, by the fact that the lower end will be accurately registered, despite variations of the rack bar has been capable of movements in temperature. other than purely reciprocating. It will be ap- 10 A further object is that of providing a scale in parent that, if in addition to thrusting or pulling which there will be little if any danger of the the rack bar upwards and downwards, its lower parts binding or becoming disarranged in such end is swung, then a binding tendency is liable manner as would ordinarily require their being to be set up between the teeth of the parts aforereadjusted or reassembled. mentioned. Now, in order to overcome this dif- 15 With these and other objects in mind, referficulty, it will be observed, as in Figs. 2 and 3, ence is had to the attached sheet of drawing that the end of the beam terminates in a curved illustrating one practical embodiment of the insurface l8 which is an arc of a circle having as vention, and in which: its center the pivot IQ of the beam. It will thus Fig. 1 is a face view of a scale; be apparent that regardless of the position of 20 Fig. 2 is a sectional side view thereof; the beam, that portion of the surface l8 which Fig. 3 is a fragmentary partly sectional view extends in a horizontal plane drawn from the of the beam and associated parts; beam pivots will be extending in a plane truly Fig. 4 is an enlarged view of the temperatureat right angles to such first named plane. Now,

compensating structure and if the end of the rack bar is maintained in con- 25 Fig. 5 is a face view of the parts as shown in tact with the surface I, it will be apparent that F 8. 4. such rack bar will be guided so that its move- In these several views, the numeral 5 indiments will be purely reciprocatory, thus overcates a scale base upon which a platform 6 is coming the difliculties heretofore enumerated.

supported to receive articles to be weighed. With a view to assuring such contact, a stirrup 30 This platform is connected to a registering 20 may have its upper end pivotally supported mechanism which, in the present embodiment at the upper end of the surface l8, its lower end of the invention, embraces a rockingly mountextending outwardly and bridging, for example, ed pointer 1 which traverses the face of as at 2|, the end of the bar M, which is pivoted a. dial 8, the latter being slitted or interthereto. In this manner, the teeth of the rack 35 rupted as, for example, at 9, so that the weight will always remain parallel with the teeth pinion. value registered may be observed from both sides Now, referring to the thermostatic structure, 01 the S6818. either through the pe 0 which forms part of the present invention, it will H which are formed in the housing ehcasihg be observed that a pair of bi-metallicthermostatic 1 the registering 'h The platform 5 is strips 22 and 23 are secured to the beam in line 4 mounted upon rockmgly Supported beam with the pivot l9. Secured to the outer ends of and the latter is connected in a manner hereinthese strips are Weights 24 and in mounting the after described to a rack M the teeth of which strips, care shouuld be taken that the metal which mesh mm pmlon to the Shaft of whlch the has the greatest co-efiicient of expansion be nor- 33: $33 f w f' fi fg f f ii gj g g mally disposed towards that side of the beam with weight '6 and that a spfing may be provided which the spring is associated. Consequently, in for the purpose f resisting downward thrusts cold weather the weights 24 will incline towards upon the platfom 5 the left, as viewed in Figs. 2 and 3, and will com- In the illustrated embodiment, no attempt has Densate for t 58 of Weight Which Would 50 been made to show the detailed adjustments narily be indicated by the registering mechanism which may be provided in connection with the due to the temperature effect on the springs. spring and other mechanism of the scale. Also, Conversely, in the case of increasing temperawhile in the drawing a fan type" scale has ture (i. e., higher than normal), the weights will been illustrated, it will be apparent that this inincline to the right, as viewed in the figures in question, thus again correcting any errors which would otherwise come into being.

Thus, among others, the several objects of the invention, as afore brought out, are achieved. It will, moreover, be appreciated that numerous changes in construction and rearrangements of the parts might be resorted to without departing from the spirit of the invention as defined by the claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A scale including a rockingly mounted beam, a thermostatic strip extending vertically in line with the beam pivots and secured to said beam and a weight secured to the upper end of said strip.

2. A scale including a rockingly mounted beam, 1:. thermostatic strip extending vertically in line with the beam pivots and secured to said beam and a weight secured to the lower end of said strip.

3. A scale including a rockingly mounted beam. a thermostatic strip extending vertically in line with the beam pivots and secured to said beam and weights secured to the upper and lower ends of said strip and disposed above and below the point of pivotal mounting of said beam.

4. A scale including a rockingly mounted beam, a thermal responsive member connected to said beam at right angles to the axis thereof, and a weight carried by said thermal responsive member and adapted to move toward or away from said beam and to either side of the point mounting thereof and in response to temperature changes.

HAROLD L. WALKER.

Images