US762187A - Weighing-scale. - Google Patents

Description

PATENTED JUNE 7, 1904.

C. W. MoKEE. WEIGHING SCALE. APPLICATION FILED NOV. 2, 1903.

10 MODEL.

fiza'aiafor' CZarezzce 201% as r- Q z of I Patented June 7, 1904.

PATENT CEEicE. r

CLARENCE \V. McKEE, OF EL PASO, TEXAS.

WElGHlNG-SCALE.

SPECIFICATION forming part of Letters Patent No. 762,187, dated June '7, 190-1.

Application filed November 2, 1903. Serial No. 179,573. (No model.)

To all who'nt zit may concern.-

Be it known that I, CLARENGE IV. MoKnE, a citizen of the United States, residing at El Paso, in the county of El Paso and State of Texas, have invented new and useful Improvements in Veighing-Scales, of which the following is a specification.

This invention relates to weighing-scales.

The object of the invention is in a ready,

simple, thoroughly efficient and practical man ner and by audible means to notify a purchaser when correct weight has been given and to prevent overweighting, with consequent loss to the seller; furthermore, to obviate friction between the operative parts of the mechanism, thereby to prevent any interference with the correct operation of the scales.

WVith the above and other objects in view,

as will appear as the nature of the invention is better understood, the same consists, generally stated, in combining, with an ordinary balance-beam weighing-scale, a signaling device operated by the movement of a scoop,v

said signaling device embodying in its construction a movable conductor including makeand-break mechanism, a guide for the conductor constituting a contact, a resilient contact, signaling mechanism in the nature of a ment of the invention capable of carrying the same into practical operation, it being understood that the elements therein exhibited may be varied or changed as to shape, proportion, and exact manner of assemblage without departing from the spirit thereof, and in the drawing the figure is a view in side elevation, partly in section, exhibiting an ordinary balance-beam weighingscale and connections between it and the signaling mechanism.

In the present instance the improvements are shown as combined with an ordinarybalance-beani weighing-scaleA, this for the purpose of convenience of illustration; but it is to be understood that the invention is not to be limited to this form of scale alone, as the improvements are equally adaptable to other forms and may be applied thereto without departing from the scope of the invention. The scale is herein shown as resting upon a counter B, beneath which is secured a vertical partition or support C, to which a part of the apparatus embodying the present invention is secured, as will be hereinafter fully described and claimed.

To the lower end of the link 1, depending from the ordinary yoke 2, is pivotally connected a movable conductor 3, preferably of copper, the same having let into it on one side thereof insulating-plates at and at, in this instance two, separated a short distance apart. The lower portion of the conductor projects through a sleeve 5, carried by a bracket 6, preferably of copper, and secured to the support C, the bracket constituting a contact for completing the circuit between the conductor and the source of electrical energy, in this instance a plurality of dry cells 7, although it is to be understood that, if preferred, other sources of electrical energy may be employed. The conductor3 moves easily within the sleeve 5, and therefore the frictional contact between the parts will be so slight as not in the least to interfere with the accurate operation of the scales.

Supported in any suitable manner adjacent to the conductor is a metallic plate 8, to which is connected a resilient contact 9, the same being, preferably, of light spring metal adapted to rest against the movable conductor, the contact being such that while thoroughly cfficient for completing the circuit it will not present such frictional resistance as to interfere with the vibrations of the beam in the weighing of articles. This contact is herein vention.

this character, is produced from an ordinary electrical bell 10, to which one line-wire 11, leading from the plate 8, is connected, a second wire 12, leading from the bell to the battery, and a third wire 13, from the battery to the sleeve 5, completing the circuit.

In the operation of the device as soon as any substance is placed within the scoop the link 1 will lower, thereby moving the conductor 3 downward, causing the contact to pass from the insulator 1 to the short length 14 of the conductor, separating it from the other insulator 4. As soon as the contact 9 reaches this portion 14: of the conductor the alarm is sounded, thereby notifying both the purchaser and seller that accurate weight has been given, the slight overweight usually accorded purchasers causing the conductor to move a farther sufficient distance downward to bring the contact 9 onto the insulator 4*, whereupon the bell will cease ringing. If, however, excessive overweight be placed in the scoop, the conductor 3 will continue moving downward,

thereby bringing the contact 9 into engagement with it above the insulator et, whereupon the bell will again start to ring and will continue ringing until the excessive weight has been removed. It will be understood, of course, that the contact 9 normally engages the insulator 4, so that when the scale is not in use there will be no alarm sounded.

In order to cause accurate balancing of the scales, owing to the connection of the conductor 3 with the ring 1, the counterweight 15 is combined with the link 16, and this will cause the scales when there is no weight either on the table or in the scoops to balance exactly.

It will be seen from the foregoing description that by the mechanism employed in this device certainty in operation will be effected and that owing to the simplicity of the parts and the manner in which they are arranged ductor, signaling mechanism, and electrical connections between the parts in circuit with a suitable source of electrical energy.

2. The combination with a scale, of a conductor carried by a movable portion thereof and including insulating means, a guide, constituting a contact for the conductor, a resilient contact normally in engagement with one of the insulators of the conductor, a bell, and a circuit, including a source of electrical energy, connecting the resilient contact and guide.

3. The combination with one of the links of a scale, of a conductor pivotally connected therewith and carrying insulators, a bracket having a sleeve in which the conductor works, a resilient contact engaging the conductor, a signaling device, and connections, including a source of electrical energy, connecting the spring-contact, bell and sleeve.

in testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CLARENCE W. MoKEE.

Witnesses:

GREENBURY BRIGHT, O. (J. MoKEE.

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