US642321A - Weighing-scale. - Google Patents

Description

No. 642,321. Patented 1an. sa, man.

E. N. GlLFlLLAN.

WEiGHlNG SCALE.

lApplication filed Mm- 30, 1898.; {Ho Mode.)

j ri" UNITED STATES PATENT OFFICE.

SSINGTCN N. GILFILLAN, OF CHICAGO, ILLINOIS, ASSIGNOR rll() EDWARD E.

MCMORAN, OF SAME PLACE.

WEIGHING-SCAL'E.

sPcFIoATIoN forming part of Letters Patent No. 642,321, dated January 3o, 1900. Application iiled March 80. 1898. Serial 110.675.717. (No model.)

T0 @ZZ whom t may con/cern.-

Be it known that I, EssINGToN N. GILEIL- LAN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in VVeighing-Scales, of which the following is a full, clear, and exact specification.

My invention relates more particularly to that class of scales known as spring scales and to that type of such class in which the weight of the material is indicated by a rotary or pivotal member actuated by the pressure on the scale-pan or other supporting device for the material to be weighed; and my invention has for its primary object to provide improved means forimparting the movement of the pan or the pan-support to the aforesaid rotary or pivotal member without the employment of rack-bars and pinions or other like devices prod uotive of excessive friction and rendering the scale inaccurate.

Vith these ends in view my invention consists in certain features of novelty in the construction, combination, and arrangement of parts by which the said object and certain other objects hereinafter appearing are attained, all as fully described with reference to the accompanying drawings, and more particularly pointed out in the claims.

In the said drawings, Figure 1 is a sideelevation of my improved scale, partly in vertical section and partly broken away. Fig. 2 is a plan view thereof, showing the pan removed 'and the pan-supporting stem broken off.

1 represents a base havin ga semicylindrical hollow standard 2 secured upon one end thereof and forming a housing for a coilspring 3, which is adjustably supported from a cross-bar 4 by means of a screw and nut 5 in the ordinary manner. The lower end of this spring 3 is secured to an angular footpiece 6 on the lower end of the pan-supporting stem 7, which passes upwardly through an opening S in the said oross-bar4and supports the pan 9 in the ordinary way. At the other end of the base 1 is arranged a standard 10, and between this and the standard 2 is located a pair of standards 11, to which latter the upper'end of the cross-bar 4 is also joined. These standards 10 and 11 form a support for the scale-plate 12, which is of arched form and located entirely to one side of the pan 9 and its stem 7, so that it will not beobscured by the pan or by material placed upon the pan. A further advantage in locating the pan and its supporting-stem to one side of the scale-plate instead of over the latter is that the pan and its weight may be arranged nearer the base and the liability of toppling overvthereby reduced to the minimum. Pivoted below the scale-plate 12 is the aforesaid rotary or oscillatory member which is actuated bythe movement of the pan or its support. In this form of the invention this rotary or oscillatory member consists of a common pointer or hand 13, pivoted on a suitable axis 14 and having a crank-arm 15 projecting downwardly through a suitable opening in the base 1. To thiscrankarm 15 is pivoted one end of a link 16, whose other end is pivoted to alever 17, which is fulcrumed on a pin 18, extending between the standards 11, and is also pivoted to the lower end of the stem 7, the part of the lever 17 through which the pin-13 passes being widened by curving or branchirgit in both directions, as shown more clearly in Fig. 2, so as to afford a broad bearing for the lever, and its rear end, where pivoted to the stem 7, is for the same reason forked, as shown at 17, the branches of the fork being bridged by the pivot-pin 19. In order that the stemV 7 may be held in an erect position as it rises and falls, it is connected at a point farther upward to an arm. 20, which is also pivoted between the standards 11. The pivot 14, upon which the hand or pointer 13 is mounted, may be supported in a pair of upwardlyprojecting plates 14a, projecting upwardly a considerable distance along the pointer, and constituting a shield therefor and protecting the same from injury. By this means it will be seen that the reciprocating movement of the stem 7 is converted into rotary movement in the hand or pointer 13, and the transmitting mechanism is of such a character that the joints or pivots do not require any considerable amount of such motion and are not productive of excessive friction.

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

1. A scale having in combination the base 1 provided with the standards 2, lO and l1, the spring-n, the stern 7 connected to said spring 3, the arm 2O connecting said stem to the standards 11, a lever 17 pivoted to said stein and projecting laterally beyond said standards 11, the scale-plate supported by said standards 10 11, the pointer pivoted under said plate between said standards 10 11 "fvg" and having a crank and a link connecting 15 said crank With the projecting end of said lever, substantially as set forth.

2. A scale having in combination the scaleplate, a base over which said plate is supported, the pair of shield-plates 14?, a pointer pivot-ed to said plates, a cushioned pan-support and a pivoted lever connected to said support and having crank connection with said pointer7 substantially as set forth.

E. N. GILFILLAN. Witnesses EDNA B. JOHNSON,

F. A. HOPKINS.

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