USRE3032E - Improvement in platform-scales - Google Patents

Description

UNITED STATES J. .E KEELEE, or PIrTsBUnG, PENNSYLVANIA.

IMPROVEMENT IN PLATFORM-SCALES.

Spccilicaton ff-friing part of Letters Patent No.

To all 'whom it' may concern Beit known that I, J. F. KEELER, late of Cleveland, in the county lof Cuyahoga, in the State zot Ohio, have invented a new and useful Improvement in the Construction of Scales and-I do hereby declare that the following is a full rand exact description thereof, reference beinghad to the accompanying drawings, and

,to the letters of reference marked thereon.

Figure 1 in the drawings is a pla-n view of my improved platform-scales 5 Fig. 2, a view of the scales inverted; Fig. 3,a side elevation Fig. 4, an end view, and` Fig. 5 a view of the end opposite to that shown in Fig. 4.

Similar letters in the several iigures represent the same parts. y

AA represent the frame of the scales, to which are hun g the levers B B and (l C', Figs. l and 2 by means of the hooks or hangers, as seen at D D D D', Figs. Zand 3. The arms or bearings of vthe levers-"by which'tl'relevers" are supported by the hangers, are of the usual form of scale joints` or bearings, as seen at-E E, Fig. 3. The small end of. the levers B B are hung to the long levers by a link, as seen at F F', Figs. 1 and 2. The levers B Bare united by the connectionsB, and the levers C .0 are united by the connections C. From the sides of these levers extend the four arms b b and c c', which are V-sliaped', and upon which rests the frame G. In this frame are inserted four points or pivots, H H H H, Figs. 1 and 4. Upon these points the platform I rests when weighing is being done. e This secures a more perfect and uniform action of the scales by preventing the swerving or jostling of the levers while the platform is raised or lowered. The platform is raised from and lowered to the frame G by a device on the un,A der side oi the frame, in connection with the lever J and connecting-rod K. The leverJ moves upon a pin or fulcrum secured td the standard I., Figs. 3, 4, and`5. To the short end of this lever J is attached the rod K by a pinjoint,l and the other end of the rod is attached to thqever M, Figs. 2 and 3, which lever is conuev d to the shaft N. Thisshaft is hung in bearings at the ends, as seen at O O, Fig. 2. Near to. the bearings are `secured two more levers, M M, which, in connection with the lever M, form a right-angled lever, as seen in 11,729, dated september 2c, 1854; Rislsifesanaggaiea July 14, Isae.

Fig. 3. 't the end o f the levervlill M are attached by pin-joints theconnecting-rodsP P, and to the connecting-rods are attache/d the rightangled levers R' R and RR by pin-joints. y

These levers movev uponv pins secured to the sides of the frame,as seen at S, Fig. 3. 'In the upper arms ofthev lwers RR are slots, in which are fitted the necks ofthe pins T, &c., whichV form shoulders above the lever and heads below, so that they move up and down with the levers. By this combination and arrangement thc platform is raised and lowered by the lever J asymay be required. When the lever is in the position seen in Figs. 4 and 5, the platform is raisedfrom olf'the frame G and rests upon the pins T, in which position the articles are placed upon the platform to be weighed,there bypreventing the'levers and bearings from sustaining 'injury by jarring or straining when loading or unloading the scales, or while run- 'nrngacaror oth erthin g'over' them.'

By turning thc lever J to J the platform decends with its load and rests on the pivots l-l, ready to be weighed. The connection of the scale-beam U to the levers G C is in the usual manner, asv seen at V and W, Figs. 3, 4,

and 5.

For the purpose of facilitating the operation vof weighin g, I have combined with the vibrating or weighing beam of the platform-scale a spring-balance, as seen at a, Figs. 3, 4, and 5. To the end ot' the beam U is attached by a pivot joint the rod d, which hooks 'into the springrod runder the table f. I attach this spring-balance to 'any style of vibrating -or weighing beam however used, whether with or without the platform-scale machinery.

. The spring g, which is connected to the spring-rod r, is inclosed in the case h. I

is the indicator and scale of weight.

The rod d may be detached from the springrod 'r andthe scales used without it. .The spring-balance, in combination with the scale-beam, (or the platform,-,scale,)A may be used in weighing freight, &c., where great celerity is desirable. In such cases, if the poise is not used, it is placed at zero, and the weights upon the table j', lshowing the larger `denominationsvrof Weight/'in whole numbers and the fractions on the index i.

In some cases I hang the weights for the 'Weighingbeam with the :larger denominations on a table independent of the spring balance,

orl` use poises on the. beam therefor.

It will be perceived that this improvement,

is simply a combination of the weighing-beam of a common scale'with therspring-balance of whatever form, which is all that I claim to have invented, and not the broad ground or `idea of combining two or more kinds of indices or scales of whateverconstrnction. This .ground I distinctly' disclaim, and confine my.-

self exclusively to a combination of the two` specified species of scalesmentioned. n By this combination and arrangement of the readily7 be weighed any number of boxesbar reis, or other articles by simply placing them,

one at a time, onto and off from the scale withont moving a Weigh.L or a poise, Whenever the difference in Weight between the articles to be weighed does not exceed the capacity of the spring-balance. l f

The frame G, in connection with the plat f :rm I, crms a kind of double platform, and as the platform I is raised and lowered to and from the frame G the levers about, but are retained in place by the frame G.

Another feature of improvement which distinguslnes` my plattbrmscales fromV all oth ers'is the raisin g the platform independently of the levers. When the levers are raised and lowered and 'not the platform,the result is that spring-balan ce may `are not swayed l e r acca l the bearingsand sockets wear oifnnequally; i

but in my improvement the levers are not raised and lowered, but the platform only, which is raised equallyat vall times without regard to the position of the Weights upon it,

which, either with or without the "frame G,

v( used or not at will,) distinguishes i-tfrom'all other platform-'scalesin use.

' 1 do not limit myself tothe particular mode y ,or means described, for'it is obvious that other means substantially the same in function may be employed.

` What I claim as my invention, land desire -to secure by Letters Patent, is Y l l. The combination of a platforznscal'eiwith a device aotingindependently oftheweighingn levers, for the purpose of raising, or lowering theplatform simultaneously at allipoints, when constructed and operating substantially as described. y

2, In combination with the Weighing-levers of a platform-scale, the intermediate platform or frame G, constructed and operating in the manner and for the purpose substantially as set forth 3. The combination of a spring-balance with the vibrating beam of a weighingscale, substantially as and for `the purpose set forth.

JOEL F. KEELER,

Witnesses:

vO; M. Enwanns,

FRANK BUSHNELL.

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