US1248106A - Weighing-scale. - Google Patents

Description

M. H. HANSEN, WEIGHING SCALE.

APPLICATION FILED NOV. 4. m5.

1,248,106. Patented Nov. 27, 1917. i

mamus H. HANSEN, or CHICAGOQIIJLINOIS.

WEIGHING-SCALE.

Specification of Letters Patent.

Patented Nov. 27, 1917.

Application filed November 4, 1915. Serial No. 59,597.

To all whom it may concern:

Be it known that I, MARIUS H. HANSEN, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented certain new and useful. Improvements in Weighing-Scales, of which the following is a specification.

The purpose of the present application is to cover specifically the details inthe construction of a scale which is covered gener-, ically, and shown as a modification, in a companion application (Case B) filed of even date herewith. In the application aforesaid the form which is elected as the preferred form has but a single load spring and the specific claims of said application relate to the features that are peculiar to a single load spring while the forms of the invention which are shown in the present applicationhave two load springs and the claims of this application relate to features that are peculiar thereto.

In all forms of the invention, however, the load mechanism is independent of the easing to the extent that the casing sustains no part of the load, but is carried by the load mechanism so that its only function is to conceal and protect itand to support the dial, the pointer, and its shaft and pinion.

The invention consists in the features of novelty that are hereinafter described with reference to the accompanying drawing which is made a part of this specification and in which v V Figure 1 is a front elevationofa scale embodying the invention with the dial and front of the casing omitted.

Fig. 2 is a vertical section thereof substantially on the line 22, Fig. 1, looking in the direction of the arrows. 7

.Fig. 3 is a section on the line 3-3, Fig. 1 looking in the direction of the arrows downward.

Fig. 4 is a perspective view of a plate for forming a swivel connection between the setting screw and the casing.

Fig. 5 is a perspective view of the socalled load-head. 1

n Fig. 6 is a view similar to Fig. 1 showing some of the parts of modified form,

Fig. 7 is a vertical section thereof substantially on the line 7--7, Fig. 6. I Fig.8 is a perspective view of the part shown in Figs. 6 and 7 for forming a swivel 3, the. lower ends of which engage washers,

4:, which in turn engage convolutions near the upper ends of load springs, 5 in such manner that the washers may be adjusted up or down, by turning them relatively to the springs, for regulating the length and therefore the tBIlSlOIl of the active portions of the springs. The lower ends of the springs engage the upper end of a so-called drawbar or load-bar to the lower end of which is attached a hook, 7, to which the load is applied by any suitable device or devices such, .for example as a scoop, pan or other device (not shown). Or the hook alone may be used and the load applied directly toit.

When a load is applied to the hook it will draw the load-bar, 6, downward in opposition to the resistance of the springs, 5, and stretch or distend the springs to an extent or distance exactly proportional to the weight so applied. This relation or condition is established by the proper adjustment of the washers, 4:, in the well-known manner.

The load-bar, 6, has, at its upper end a portion,.7, of inverted U-shape and to this inverted portion is jointed the upper end of a rack-bar, 8, which engages a pinion, 9, rigidly secured to a shaft, 10, which is journaled in and supported by the dial, 11, and a bridge piece, 12, which is rigidly secured to the back of the dial so that when the loadbar, 6, is moved downward the rack-barwill cause the pinion to rotate clockwise and carry with it the pointer, '13, which is rigidly secured to thesh'aft, 10. The rack-bar is held normally in engagement with the pinion, 9, by a weight, 14:, which is formed integrally with the rack-bar.

. As above intimated the initial adjustment of theiscale so that the pointer, stands at zero when no load is on the hook, 7 is accomplished by adjusting the washers, a, up ward or downward relatively to thesprings, as may be necessary. After this first adjustment is accomplished itmay become necessary to again adjust or reset the scale so that the pointer will stand at zero at the-com mencement of the next weighing operation. Thismaybe necessitated by anyone of a number of causesas, for example, by applying to or removing from, the '-l1'ook,-'7, a scoop, pan, or other load receiving device. This readjustment or re-setting is accomplished by a setting screw, 5, which passes through offset portions, 6, and 17, of the load-head, 2, and has threaded engagement with one of said offset portionssay the portion, 17, the other of said offset portions serving simply as a guide and brace for sustaining the screw against lateral movement. In the form of the load-headshown in Figs. 1, 2 and 5, these offset portions are formed by offsetting a portion of the metal plate of which the load-head is formed, while in the form shown in Figs. 6, 7 and "9, they are formed by a flange, 17*, at the lower end of said plate and a lug, 16?, formed by deflecting a portion of the plate at a point intermediate of its ends.

In both of these forms of the invention the screw is provided near one of its ends with acircumferentia'l groove, 18, for effecting ,a swivel connection between. it and the casing, 20. This connection is completed by a part, having a U-shaped notch which receives the reduced portion of the screw, resulting from saidgroove, so that the part in which said notch isformed straddles the reduced portion of the screw.

As shown in Figs. 1, 2, 3 and 4,;this notched part is a simple plate, 19 which is riveted to the bottom, 20 of the casing while as shown in Figs. 6, '7 and 8 it is a flange, 19, of asubstan-tially U-shaped part, 19", which is shown in perspective view in Fig. '8, the details of which are fully shown andd'escribed 1 111 my application aforesaid.

In all of the 'several forms of the invention one end of the setting screw is notched or otherwise shaped to receive ascrew-driver or other implement for turning it. In the form of the invention shown in Figs. 6 and 7 the setting screw passes through an opening in the top of the casing, as it does in my application aforesaid, while in the form of the invention shown in Figs. 1 and 2, 'the setting screweatends downward from the load head, completely through the casing, and pasess through an opening in the bottom,20, thereof. This is preferable in some types of suspension spring scales.

The operation of the two forms of the invention 1s, generally speaking, substantially the sameas that of the form shown in my application aforesaid, and need not be here again described.

It may be said however, that the use of two load springs arranged at equal distances upon opposite sides of the central line of strain has certain advantages over a single loadspring arranged directly in said line.

What I claim as new is 1. A suspension spring scale having, in combination, a casing having openings through its top and bottom, a load-head passing throughwthe top opening and slid able freely in said opening the portion of the load-head which projects above the top of the casing having. means whereby it is suspended, adjustable means connecting the load-head and easing, whereby the casing is supported by the load-head and relieved of sustaining any part of the load, a pair of load springs the upper ends of which are connected to said loadhead, a load-bar to which the lower ends of said springs are connected, said load-bar passing through the bottom opening and sli'dable freely in said opening and means for applying the load to the lower end of said load-bar.

2. A suspension spring scale having, in combination, a load head, a pair of load springs, means connecting the upper ends of'the load springs with the load-head at equal distances on opposite sides of its longitudinal center, a load-bar to which the lower ends of said springs are connected at equal distances on opposite sides of its longitudinal center, means for applying the load to the lower end of said load-bar, a casing having through its top an opening through which the load-head passes and is freely movable and having through its bottom an opening through which said loadbar passes, a setting screw having threaded engagement with the load-head, means forming a swivel connection between the setting screw and easing, a pointer and means for transmitting movement from the load-bar to the pointer.

3. A spring scale having, in combination, a pair of load-springs, a load head to which their upper ends are connected and by which they are supported, a load-'barto which the lower ends of springs are connected, means for applying the load to the lower end of said load-bar, a casing, and a setting screw having threaded engagement with the loadhead whence it extends downward completely through the casing, the bottom of the casing being provided with openings through which the lower ends of the load bar and setting screw pass.

4. A suspension spring scale having, in combination, a load-head consisting of a plate having offset portions, a pair of load springs the upper. ends of which. are connected to said offset portions at equal distances on opposite sides of its longitudinal center, a draw-bar to which the lower ends of said springs are connected at equal distances on opposite sides of its longitudinal center, means for applying the load to the lower end of said draw bar, a casing, a setting screw having threaded engagement with the load head, whence it extends downward completely through the casing, the bottom of the casing being provided with openings through which the lower end of the draw-bar and the setting screw pass, a

dial carried by the casing, a pointer, a shaft 10 carrying the pointer and in turn carried by the dial, and means for transmitting move ment from the draw-bar to said shaft.

MARIUS H. HANSEN.

l/Vitnesses L. M. HOPKINS, L. F. KINNUOAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0."

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