Weighing-Scale Page: 2 of 3
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Patented June 27, 1905.
UNITED
STATES
PATENT OFFICE.
CLARENCE W. MCKEE, OF EL PASO, TEXAS.
WEIGHING-SCALE.
SPECIFICATION forming part of Letters Patent No. 793,537, dated June 27, 1905.
Application filed November 2, 1903, Renewed May 20, 1905. Serial No. 261,424.To all wIhorn, it imay COflCe7'1:
Be it known that I, CLARENCE W. MCKEE,
a citizen of the United States, residing at El
Paso, in the county of El Paso and State of
5 Texas, have invented new and useful Im-
provements in Weighing-Scales, of which the
following is a specification.
This invention relates to weighing-scales.
The object of the invention is in a ready,
to simple, thoroughly - efficient, and practical
manner to prevent overweighing, with con-
sequent loss to the seller, and at the same time
notify a purchaser that correct weight has
been given; furthermore, positively to elimi-
15 nate all friction between the operative parts
of the attachment, thus to obviate any inter-
ference with the correct weighing operations
of the scale.
With the above and other objects in view,
20 as will appear as the nature of the invention
is better understood, the same consists, gen-
erally stated, in a signaling device for weigh-
ing - scales embodying in its construction a
contact movable with the pan-support and a
25 make-and-break device supported by a fixed
part of the scale comprising a cup or holder
to contain a body of mercury to be engaged
by the contact when the pan-support de-
scends, the said contact and mercury-holder
30 being in circuit with a source of electrical
energy including a bell or other means for
giving an audible signal.
The invention consists, further, in the novel
construction and combination of parts of a
35 signaling device for scales, as will be herein-
after fully described and claimed.
In the accompanying drawing, forming a
part of this specification, and in which like
characters of reference indicate correspond-
40 ing parts, there is illustrated one form of em-
bodiment of the invention capable of carry-
ing the same into practical operation, it be-
ing understood that the elements therein ex-
hibited may be varied or changed as to shape,
45 proportion, and exact manner of assemblage
without departing from the spirit thereof,
and in this drawing the figure is a view in
side elevation, partly in section, exhibiting
an ordinary balance-beam weighing-scale andconnections between it and the signaling mech- 50
anism.
In the present instance the improvements
are shown as combined with an ordinary bal-
ance-beam weighing-scale A, this for the pur-
.pose of convenience of illustration; but it is to 55
be understood that the invention is not to be
limited to this form of scale alone, as the im-
provements are equally adaptable to other
forms and may be applied thereto without de-
parting from the spirit of the invention. The 6o
scale is herein shown as resting upon a coun-
ter B merely to facilitate an understanding
of the. invention, it of course being under-
stood that the device can be sold as an article
of manufacture and attached to any ordinary 65
scale. The signaling device is placed beneath
the counter in order to prevent its being tam-
pered with by unauthorized persons.
To the pan-support 1 of the scale, and at or
near the lower end thereof, is secured a collar 70
2, between which and the said support is in-
terposed suitable insulating material 3 in the
nature of .a gasket or ring. From one side
of the collar 2 extends a downward-projecting
contact-point 3, which may be of any suitable 75
material, preferably of platinum on account
of its non-destructive qualities, said contact
being adapted to enter a cup or holder 4, con-
taining a body of mercury 5, said cup being
carried by or integral with a collar 6, secured 8o
to one of the scale-uprights 7 and insulated
therefrom by suitable insulating material 8.
The level of the mercury in the cup will be
sufficiently removed from the upper end there-
of to permit the contact to move a sufficient 85
distance downward before engaging there-
with to insure down weight; but in the event
of overweight the contact will by remaining
in the mercury cause a continuous sounding
of the alarm or signal until the overweight 90
has been removed. Each collar has connected
with it a conductor 9 and 10, respectively,
constituting a circuit in which is included an
ordinary electric bell 11, the terminals of the
circuit being connected with a suitable source 95
of electrical energy, such as a plurality of
dry cells 12, as clearly shown.
The device of this invention, while exceed-No. 793.537.
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McKee, Clarence W. Weighing-Scale, patent, June 27, 1905; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth512447/m1/2/?rotate=90: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.