US1181442A

US1181442A - Platform-scale.

Info

Publication number: US1181442A
Application number: US2427215A
Authority: US
Inventors: James David Frye
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-04-27
Filing date: 1915-04-27
Publication date: 1916-05-02
Anticipated expiration: 1933-05-02

Description

J. D. FRYE.

PLATFORM SCALE.

APPLICATION FILED APR-27. 1915.

1 1 8 1 ,442. Patented May 2, 1916.

2 SHEETS-SHEET I.

Attorneys J. D. FRYE.

PLATFORM SCALE.

APPLICATION FILED APR.27.1915.

1 1,181,442. Patented May 2,1916.

Witnesses mfififii276 Inventor W by y I r I o m Mg Attorneys JAMES DAVID FRYE, OF ST. J'OHNSBURY, VERMONT.

PLATFORM-SCALE.

Specification of Letters Patent.

Patented May 2, 1916.

Application filed April 27, 1915. Serial No. 24,272.

To all whom it may concern:

Be it known that 1, JAMES DAVID Fern, a citizen of the United States, residing at St. J ohnsbury, in the county of Caledonia and State of Vermont, have invented a new and useful Platform-Scale, of which the following is a specification.

The present invention appertains to scales, and aims to provide a novel and improved platform scale.

The object of the invention is the provision of a platform scale embodying novel and improved features of construction, whereby the scales will be thoroughly eflicient in operation, and in order that the utility of the scale will be enhanced.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can-be made within the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawings, wherein Figure 1 is a plan view of the improved scale, the platform being removed, and portions being broken away. Figs. 2 and 3 are sectional views taken on the lines 22 and 3-3, respectively, of Fig. 1. Fig. 4; is a view similar to Fig. 3, illustrating a modification. Fig. 5 is a perspective view of one of the main levers of the scale.

In carrying out the invention, there is provided a rectangular frame 1, within the upper edge portion of which the platform 2 is mounted for vertical movement, the working parts of the scale being confined within the frame 1 and below the platform, and the the platform being securedupon a pair of longitudinal stringers 3 arranged adjacent and parallel with the sides of the frame.

A pair of depending supports 4: is secured to the side edges of each end portion of each stringer 3, and the lower ends of the depending supports 4 are provided notches 5. The two pairs of supports at each end of he structure are arranged adjacent the respective end ofthe frame 1, and a pair of transverse rods 6 adjacent the ends of the frame are engaged in the notches or bearing portions 5 of the respective sets of supports 4. The platform 2 is thus supported by the rods 6 which are carried by the main levers, as will hereinafter more fully appear.

A pa r of main levers 7 are employed, the

same being disposed longitudinally in aline' ment, or in the longitudinal median line of the structure between the stringers 3. The inner or adjacent ends of the levers 7 are arranged at the center of the structure, and the remote or outer ends of the levers 7 are provided with horizontal forks 8 which are fulcrumed to the frame 1. In order to fulcrum the main levers 7 within the frame, a pair of cross bars 9 is mounted within the frame, the terminals of the cross bars 9 being secured to the sides of the frame 1, and the cross bars being arranged between but close adjacent the supports 4 of the platform. Two concaved bearings 10 are secured upon each cross bar 9 under the branches of the respective fork 8, and the said branches are provided with lower recesses 11 receiving the bearings 10 and cross bars 9, as suggested in Fig. 3, or in other words, the branches of the forks are provided with arched portionsll extending over the bearings 10. Knife edged pivots 12 are secured to the branches of the forks 8 at the upper ends of the recesses 11 and seat in the respective underlying bearings 10, whereby the main levers 7 are fulcrumed upon the cross bars 9 of the frame. The

main levers 7 have relatively long inner arms and relatively short outer arms, it being noted that each main lever has a single inner arm, and a pair of outer arms. The outer arms of the levers project between the respective pairs of supports 4: of the platform over the respective rods 6.

The outer or remote arms of the main levers 7 carry the rods 6, and to this end, the outer or remote ends of the levers are provided with upwardly projecting knife edged pivots 13 upon which concaved bearings 14 are seated, so as to extend across portions of the lever 7. U-shaped stirrups 15 are ter minally secured to the ends of the bearings 14: and hang below the outer ends or arms of the main levers. It will be evident that there are four sets of pivots 13, and accompanying parts, and that the four sets are located at the corners of the frame in order that the platform will be properly supported at all four corners, and with a minimum liability of the platform tilting when the wagon or other object is pulled or moved thereon. The rods 6 are connected to the 'llO ing hooks 17 engaging the stirrups 15, and

the lower ends of the links 16 having hooks 18 engaging the rod 6. The rod 6 is preferably provided with upwardly projecting off sets 18 for the engagement of the hooks 18,

whereby the links 16 and rods 6 are not liable to become displaced during the operation of the scale.

The inner or adjacent ends or arms of the main levers 7 are connected to an extension or secondary lever 19 projecting toone side of the frame 1. This extension lever 19 is fulcrumed between its ends to a pair of standards 20 carried by a crosspiece 21 terminally secured to the sides of the frame 1 below the adjacent ends of the levers 7. The inner endof the lever 19-.lies below the inner ends of the levers 7, andthe outer end or arm of the lever 19 vprojects beyond one side of the frame 1 and is connected tolthe lower end of the link 22. The link 22'is connected at its upper end to the usual: scale beam (not shown), wherebythemovement of the

levers

7 and 19 is transmitted to;the scale beam in the usual manner for indicating the weight of the object supported upon the platform. Since the scale beam may be of ordinary construction, it is not deemed necessary to illustrate and describe the same in detail, it being evident that various scale beams may be employed with equal; .propriety and success. The inner end of the extension lever 19 is provided with a fork 23 whose branches lie below the respective inner arms of the main levers 7,. and a knife edged cross bar or pivot 24 is terminally secured to the branches of the fork 23 and lies below the inner ends of the levers 7 In order to connect the adjacent IOI' inner ends of the

levers

7 and 19, a pair of hangers 25 is employed, the same having hooks 26 at their lower ends forming bearingsin whichthe knife edged pivot 24 is seated, and the upper ends of the hangers 25 are provided with angularly extending portions 27 pivoted upon the inner ,ends of the main levers, Adjustable clamping bolts 28 are mounted in longitudinalslots 29provided inthe inner or adjacent end portions ofthe levers 7, and are provided withzupper conical heads 31 forming pivots upon which the portions 27 of the hangers 25 are seated. The portions 27 of the hangers are provided with lower notches 32 for the engagement of the pivot heads 31. It willbe notedat this point, that the bolts 28 may be adjusted longitudinally relative to the main levers 7, whereby the proper ratio of movement between the main and extension levers is readily obtained, the hangers 25 being readily movable with the bolts or adjustablemembers 28.

In order to hold theiplatform 2 against longitudinal and lateral movement, but to enable the same to move upwardly and downwardly,- links 33 are terminally engaged to eye screws or other bearings 34 secured to the stringers 3 and cross bars 9.

Links 35 also connect the branches of the forks 8 of the main levers 7 and the cross bars 9' forpreventing the main levers from shifting transversely upon the bearings 10.

In operation,...when the wagon or other object is moved onto and supported by the platform 2, the weight of the object will be transmitted to the-supports of the platform which are carried. by the rods 6. The rods 6 at the opposite ends will therefore receive the weight of the object, and the-rods 6 being hung fromwthe outer or remote arms of the main levers will swing the said arms downwardly, and this will raise the adjacenttarms of the'main levers. The upward movementof the adjacent arms of the main levers will be transmitted toithe inner arm of the extension lever 19, and as a result the outer-arm of the extension lever will be moved downwardly to pull the link 22 downwardly for actuating the scale beam in the usual: manner. The present construction is such that it will operate efi'ectively, and is not liableto become frozen or clogged up. The present scale is sensitive in operation, wherebythe object may be weighed accuratelyor with precision. The'platform is :not liable totiltwhen the wagon or other object is run. or moved thereon, and the weight of the-object-will be properly transmitted to the mainalevers even though the object is placed at any point upon theplatform. Theadvantages of the various structuralfeatures of the invention are thought to be-obvious without lengthy description being necessary.-

The present scale maybe adapted for various uses, that is, it. may be constructed-in various sizes and proportions for use as a platform scale, counter scale and the like.

In Fig. 4, there is illustrated a modified means of supporting theplatform 2 from the main levers; In this view, asingle outer arm of one main; lever is illustrated, although it: is tobe understood that theconnectionbetween said arm and platform'may be employed at allfour corners of the structure. In this form, the supports 4, rods 6 and links 16 are eliminated, and depending rods 4 are attached to the ends of the stringers 3, and are providedat their lower ends with upturnedhooks 17 engaging the stirrups 15. The rods 4 whichserve as supports for the frame 1, are located adjacent the ends of the branches of the forks 8, and the hooks 17 project inwardly and upwardly to engage the stirrups 15. It will be evidentthat the weightimposed-upon the platform will be transmitted 1 by the rods or supports 4 directly to the stirrups 15.

' In either form of the invention, the various parts of the invention are adapted to oscillate or vibrate properly relative to one another during the weighing operation, and in order that the strains may be properly transmitted from the platform to the scale beam operating link 22.

Particular attention is directed to the fact that the vital parts of the present mechanism are protected, so that they are not liable to be frozen or otherwise impaired.

It will be understood that when the invention is embodied in counter and other scales appropriate changes in details may be made, within the scope of the appended claim without departing from the spirit of the invention.

Having thus described the invention, what is claimed as new is:

In a scale, a pair of main levers having adjacent and remote arms, a platform supported by the remote arms of the main levers, an extension lever having a fork below the adjacent arms of the main levers, a pivot member carried by said fork, longitudinally adjustable pivot members carried by the adjacent arms of the main levers, and hangers having portions at their upper ends engaged upon the pivot members of the main levers and having bearing portions at their lower ends receiving the pivot member of the extension lever.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

JAMES DAVID FRYE.

WVitnesses:

F. S. Woons, JAMES B. CAMPBELL.

copies or this patent may be obtained for five cents each, by addressing the "commissioner of Patents. Washington, D. G."