US1325188A - Scale. - Google Patents

Description

w. w. BOYD.

- scm. APPLICATION FILED JULY 5.1917. 1,325,188. Patented Dec. 16,1919.

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STATES PATENT OFFICE.

WILLIAJM. WALLAtJE BOYD, OF BUFFALO, NEW YtIBK, ASSIGHCiB. TO BUFI'ALb SCALE I v OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

SCALE.

Specmmtion qt Letters Patent. Patented Dec. 16, 1919.

Application filed m a, 1911. Serial no. 179,0.

useful Improvements in Scales, of whichthe following is a specification.

This invention relates to scales and more particularly to the type whichare used for weighing heavy ob ects like auto trucks,

railroad cars and the like. 7 One of the objects of this invention is to provide a coupling or oomiector between the' pair of Iongitudinal levers generally known as end levers and the single transverse .lever conneoting with the steelyard generally known as a cross lever, which coupling'willpermit of transmitting'the movement from this pair of levers to the single 1m; with a minimum of friction and under a com ression strain and-with an action which self tion, not liable to get out of order and caqcorresponding parts throughout the" '50 pable of being produced at comparatively low cost. In the accompanying drawings; 1 Figure 1 is a. side elevation partl-y in tion, showing my improvements applied to a pair of longitudinal or end levers and a. single cross lever of a scale. Fig. 2 is a. fragmentar vertical transverse section of the same. ig. 3 is a vertical longitudinal section taken on line 3-3, Fig. 2. Fight is a vertical transverse section taken on the correspondingly numbered line in Fig. 1. Fig. 5 is a. perspective view of one of the sections of the strut or yoke forming Fig. "(i is a slmilar view of one of the hearmy improvements. n a v Similar characters of reference. views. v 1, 1- represent a pair of longitudinal levers of a. scale which arearra 7 each: othe see- ' bearing part of; the coupling which contains my invention.

'14 h-. wise in line and have their. on seams g r,. These leversfar commit-". 3;

known in the'trade as end levels andore operatively connected with'tlie platform of the'scale so that the free opposing'ends of these lovers are depressed when the load is placed upon the platform. 2- represents a 'singlelever arranged transversely below the opposing ends of the, end -levers, this lever being oommonl known in the trade as a cross lever. he same is -so mounted that it is depressed by'theend', levers and transmits motion to the scale beam b means of an upright steelyard in the usual and well known manner.

My invention resides in the means wherehy the motion of theend levers is transmltted to the cross lever and in their preferred form these means are constructed as follows: f p

'3 represents t'wo nose pieces or irons one of which is arranged on the free end of each end lever so as to'pro ect laterally from opposite sides thereof. ach of these nose irons is preferably mounted on its res'pectivelever by providing the upper part of the nose iron with an opening which resolves the lever, and a set screw 4 arranged verselv thereto and has its opposite ends projeotlng from opposite sides of the respective nose iron. Each of thwe upper knife edges is preferably'secured in its nose iron by casting the latter upon this knife edge so'as-to' provide downwardly facing surfaces on the underside of-this knife edge at opposite 'ends thereof.

. 6, 6' represent two pairs of upper bearing blocks the members of each pair being arranged with their upper sides below the hearin faces at opposite ends of one of the upper mifcedges'and each of these blocks having fa conven underside or hearing face 7 which is curved transversely or about an axiswhich is parallel with the length of I'the and levers. Each of 7 these upper bearisfpfr'ovided"with a concave upwhieh is preferably curved or ahoutnn axis transthe la ngthof the end levers. In

IZQYi with. when. ng.piece 8 r "fiahiirdened preferably of. fiiihstentially dove-tail form and seated in a correspondingly shaped recess 9 formed transversely bears against the adjacent lower art of the ad]aoent upper knife edge.

' its innercnd each of these wearing pieces is arranged transverscl 1 is preferably provided with a point or pro jeotion 1'0 which is adapted to engage the adjacent vertical surface of the respective nose piece or iron and thereby reduce to a minimum the friction between these parts if they should come into engagement with each other during the Working of the scale.

On the cross lever is arraned a lower knife ed e 11 which is preferably mounted thereongy castin this leveron the same, this being refera ly effected by castin this lever on tl iis knife edge, so that the atter thereto or parallel with the end levers an so that the ends of this knife edge form two upwardly facing bearing surfaces on opposite sides of the On the central part cross lever.

12, 12 represent a pair of lower bearing blocks which are arranged on opposite sides of the cross lever and each provided on its underside with a curved face which is arranged the lower knife edge and is curved about an axis which is transversely of the cross lever or arallel with the end levers. The upper and of each lower bearing block is provi ed with a. convex bearing face which is curved about an axis arranged parallel with the cross lever or at right angles to the end levers. of the lower face of each lower bearing block the same is provided with a wearing iece 13 which is preferably constructed of hardened and ground steel and of dove-tail form and seated in a correspondingly'shapcd recess 14 formed in the lower face of this block and extending in a direction transversely of the cross lever or len hwise of the end levers. The lower su ace of each of the wearing pieces of each lower bearing block is preferably flush with the lower face of the respective block and at its inner end the same is provided with a oint or projection 15 forming a friction w iich is ada ted to engage with the adjacent vertical side of the cross lever and thereby reduce to a minimum the area of contact between these parts when they come into on cut with each other. I

Between the upper and lower bearing blocks is arranged a strut or yoke which is adapted to transmit motion from the end levers to the cross lever by pressure. In the preferred form of this strut the same comprisesgtwo upright'scctions 16 16 which are arranged transversely of the end levers wise of the cross lever on oppoand lengt site sides of'the latter. Eachof these strut flush with the upper surface of this above the upper side of one end of i on the upper strut in a levers in response 'to the pressumfwlnch is sections or members is provided at its upper end on o'posite sides of one of the end levers witi two upwardly facing concave seats 17, 17 each of which is curved about an axis which is parallel with the end levers and engages with the lower convex face of one of the corresponding pair of upper bearing blocks. Centrally on its lower end each of the strut sections or members is, provided with a downwardly facing lower concave bearing face 18 which is curved about an axis arranged transversely of .the end levers and parallel with the cross lever and engages with the upper convex face of one of the lower bearing blocks. The two sections or members of the strut are preferably connected with each otherjby a tie so that they practicall form one piece and move in unison. in various ways, that shown in the drawings being suitable for this purpose and comprising an externally screw threaded tie rod 19 which is arranged horizontally and lengthwise of the end levdrs and passes through corresponding openings in the central parts of the strut sections and two pairs of clampmg screw nuts 20, applied to this tie rod, the members of each pair bearing against opposite sides of one of the strut sections, as best shown'in Fig. 3. By'shif ting these This connection may be effected may be adjusted to bring their upper and lower bearing surfaces into the roper position relative to the bearing blocks with which they cooperate.

In order" to hold blocks against fdisplacement on its r8 tive strut section the same is provided ii i the central part of its convex face with a retaining pin 21 which is secured at one end in a recess 22 in the respective bearing block while its opposite end projects beyond the convex face of the same and into a retainin recess 23 formed centrally in the correspcnlf ing' concave bearing surface .of the respective strut section;

When the end levers each of the hearing this movement is transrfiltted by the upper and lower bearin bloc and the strut to the cross lever so llhat the latter turns about its axis at right angles to that of the and levers. Duringjthis movement the and levers rock upon the upper bearing blocks, the cross lever rocks upon the lower bearin blocks, and the upper bearing blocks r0 ends of the strut in a direction transwersely of the end levers and thefllower bearing blocks rock on the lower ends of'the direction lengthwiseiof ,the end exerted u on these members. By this means the mom rs which are subjected. to"com-' pression strains while transmittingmotion from the end levers to tlhccross lever autoare depressed by a load imposed upon the platform of the scale Ill v tive bearing b which is imposed upon this cou ling is there- .forefully sustained while at t e same time reducing to a minimum the friction between block.

matically aline themselves into the proper sition for enabling the upper and lower nife ed to age fully with the res cgee fie at all times. The l diid the several members which transmit the mo- .tion of the end, levers to the cross lever, 'thereby obtaining the maximum sensitive- 11688 1n the operatiomof the scale. It is therefore possible by the use of this conling between ,the end levers and the cross ever'to materially increase the accuracy of the scale without weakening the same or involving any material increase in cost of construction.

I claim as my invention:

. 1.-'In a scale, the combination of two longitudinal levers having their ends opranged below the ends of said longitudinal levers,'and 'a coupling for connecting said longitudinal and transverse levers comprising nose irons arranged respectively on the ends of said longitudinal levers and each provided with an upper transverse knife edge projecting laterally from opposite sides of the respective longitudinal lever, two upper bearing blocks arranged on opposite sides of each longitudinal lever and each provided with an upper face engaging the adjacent lower part of the upper knife edge and having a lower convex face which is curved transversely, an upright strut provided with two pairs of upper concave faces each of whichis curved transverse] and engages the convex face of one of said upper bearing blocks and said strut being also rovided with two lower concave faces 'whic 1 are arranged on opposite sides of the transverse lever and each of which is curved lengthwise, two lower bearin blocks arranged on opposite sides of said transverse lever and each having a convex upper face which is curved lengthwise and engages with one of the lower .concave faces of the strut and each lower bearing block'also hav.- ing a lower face, and a lower longitudinal knife edge arranged on the transverse lever and having its ends arranged on opposite sides of the said lower lever and each of said ends engaging its upper side with the lower face of the adjacent lower bearing -2.'I n a scale, the combination of two longitudinal levers having their ends op- .posln each other, a transverse lever arrange below the ends of said longitudinal levers, and a coupling for connecting said longitudinal and transverse levers comprisoi nose ironsarran-ed res ectivel on the ends of said-longitudinal ev rs and each provided with an up transverse knife wedge projecting lateral y fromopposite sides and said strut-being also rovided with two lower concave faces whic are arranged on opposite sides of the transverse lever and each of which is curved lenlgthwise, two

lower bearing blocks arrange on o posite sides of said transverse lever and eac having a convex upper face which is curved lengthwise and engages with one of the lower concave faces of the strut and each lower hearing block also having a lower face and a lower longitudinal knife edge ar-- ranged on the transverse lever and havin its ends arranged on op ositesides of sai transverse lever and c1151 gagin its upper side with the lower face of the a jacent' lower bearing block, each of said bearing blocks being provided in its convex face with a retaining in and the strut beingprovided in each 0 its concave faces with 'a recess which receives the retaining pin of the adjacent bearing block.

3. In a scale, the combination of two longitudinalylevers having their ends opposing each other, a transverse lever arranged below the ends of said longitudinal levers, and a coupling for connecting said longitudinal and transverse levers comprismg nose irons arranged respectively on the ends of said longitudinal levers and each provided with an upper transverse knife edge projecting laterally from op ositc sides of the respective longitudinal ever, two upper bearing blocks'arranged on opposite sides of each longitudinal lever and each provided with sin-upper concave face oposite the adjacent lower part of the upper nife edge and havinga lower convex face which is curved transversely, an upright strut provided with two pairs of upper concave faces each of which is-curved transversely and engages the convex face of one of said upper bearing blocks and said strut being also rovided withtwo lower concave faces whic are arranged on op osite sides of the transverse lever and eac is curved lengthwise, two lower bearin blocks arranged on opposite sides of sai transverse lever and each having a convex upper-face which is curved lengthwise and engages with one of the lower concave faces nal knife edge arranged on the transverse lever and having its ends arranged on opof said ends en-.'

of which.

posite sides of said transverse lever and each of said ends enga 'ng its upper side with the concave lower ace of the adjacent lower bearing block, each of said bearing blocks being provided on its concave face with a wearing piece which engages with the adjacent part of the respectiveknife edge.

4. In a scale, the combination of two ion gitudinal levers having their ends opposing each other, a transverse lever arranged below the ends .of said longitudinal levers, and a coupling for connecting said longitudinal and transverse levers comprising nose irons arranged res ctively on the ends. of said 5 longitudinal evers and each (provided with an upper transverse knife e ge pro ect1ng laterally from o posite sides of the respective longitudina lever, two upper bearing blocks arran ed on opposite sides of each o'longitudinal ever and each provided with an upper concave face posite the adjacent lower part of the upper rnife edge and haw ing a lower convex face which s curved transversely, an upright strut provided with two pairs of upper concave faces each of which is curved transversel and engages the convex face of one of sai( u )per bearing blocksand said strut bein a so provided with two lower concave Ewes which are l0 arranged on opposite sides of the transverse lever and each of which is curved lengthwise, two lower bearing blocks arranged on opposite sides of said transverse lever and each having a convex upper face which is curved lengthwise and engages with one of the lower concave faces of the strut and each lower bearing block also havin a lower concave face which is curved transversely, and a lower longitudinal knife edge arranged onthe transverse lever and having its ends arranged on opposite sides of said transverse lever and each of said ends on ing its upper side with the convex lower Ed e of the adjacent lower hearing block,

46 each of said bearing blocks being provided in its concave face with a dove-tail recess and a dove-tail-wearing piece arranged in said recess and engaging with the adjacent part of the respective knife edge.

60 5. Ina scale, the combination of two iongitudinal levers having their ends opposing each other, a transverse lever arranged below the ends of said longitudinal levers. and a coupling for connecting said longitudinal and transverse levers comprising nose irons arranged respectively on the ends of said longitudinal levers and each provided w th an up or transverse knife cdgc projecting lateral y from opposite sides of the respective longitudinal lever, two up )er hearin blocks arranged on o posite Sit es of each longitudinal lever am each provided with an upper concave opposite the adjacent lower part of the upper knife edge and havi5 ing a lower convex face which is curved transversely, an upright strut provided with two pairs of upper concave faces each of which is curved transversel and engages the convex face of one of sad u per bearin hlocks and said strut being aso rovided with two lower concave faces whici are arranged on opposite sides of the transverse lever and each of which is curved len hwise, two lower bearing blocks arrange on opposite sides of said transverse lever and each having a convex upper face which is curved lengthwise and engages with one of the lower concave faces of the strut and each lower bearing block also havin a lower concave face, and a lower longitu inal knife edge arranged on the transverse lever and having its ends arranged on opposite sides of said transverse lever and each of said ends engaging its upper side with the con cave, lower face of tie adjacent lower hearing block, each of said bearing blocks being provided on its concave face with a wearing piece which engages with the adjacent art of the respective knife edge and wider is provided at its inner end with a friction point adapted to engage with the side of the adjacent member.

6. In a scale, the combination of two longitudinnl levers having their ends'opposing each other, a transverse lever arranged below the ends of said longitudinal levers, and a coupling for connecting said longitudinal and transverse levers comprising nose irons arranged respectively" on the ends of said longitudinal levers and each rovided with an upper transverse knife e ge rejecting laterally from o positc sides of t ie respective longitudina lever, two paiis of upper hearing blocks arranged on op osite sides of each longitudinal lever an each providcd With.- an upper concave seat engagin the adjacent lower part of then per kni e edge and having a lower convex ace which is c urvcd transversely, an upright strut ro vidcd with two pairs of upper concave nccs each of which is curved transversely and engages the convex face of one of said upper bearing blocks and said strut being also )rovidcd with two lower concave faces which are arranged on opposite sides of the transverse lever and each of which is curved lengthwise. two lower bearing blocks ar ranged on opposite sides of said transverse lever and each having convexupper face which is curved lengthwise and-enga es with our of the lower concave faces of t e strut and each lower hearing block also having a lower concave face, and a lower longitudinu] knife edge arranged on the transverse lever and having its ends arranged on opposite sides of said transverse lever and each of said ends engaging its upper side with the concave lower face of the adjacent lovl'er bearing block, said strutccm rising two sections each-bf which is prcvi ed with one pair of said upper concave and one of said ower concave faces, and atie connecting said sections.

7. In a scale, the combination of two longitudinal levers having their ends opposing each other a transverse lever arranged be low the en s of said longitudinal levers, and a coupling for connecting said longitudinal and transverse levers comprising nose irons arrangedrespectively. on the ends of said longitudinal levers and eacliflprovided with an up r transverse knife ge projecting lateral y from opposite sides of the respective longitudinal lever, two up r bearin blocks arranged on o posite si es of eac1 longitudinal lever an each provided with .an upper concave face engaging the adjacent lower part of the upper knife edge and having a lower convex face which is curved transversely, an upright strut provided with two pairs of upper concave faces each of which is curved transversely and engages the convex face of one ofsaid upper bearing blocks and said strut being also provided with two lower concave faces which are arranged on opposite sides of the transverse lever and each of which is curved lengthwise, twolower bearin blocks arranged on op osite sides of said transverse lever and eac having a convex upper face which is curved, lengthwise and engages with one of the lower concave faces of the said lower concave fac'es, and a tie connect ing said sections and comprisingan externally threaded rod extending through openings in said strut sections, and screw nuts arranged on said rod and bearing against opposite sides of each of said strut sections.

\ WILLIAM WALLACE BOYD.

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