Adding-Machine. Page: 3 of 4
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UNITED STATES PATENT OFFICE
ALBERT KING BARIMORE, OF BENTON, TEXAS.
ADDING-MACHINE.
SPECIFICATION forming part of Letters Patent No. 293,399, dated February 12, 1884.
Application filed Septcmber 13, 1883. (No model.)"io aZl zhon 7t 7 UL COnCe7:7b:
Be it known that I, ALBERT KING BAR-
MORE, a citizen of the United States, residing
at Benton, in the county of Atascosa and State
5 of Texas, have invented a new and useful Im-
provementin Adding-3Machines, of which the
following is a specification.
This invention relates to that class of add-
ing-machines in which a wheel provided with I
io teeth is actuated by the operator to advance
at each movement as many teeth as there are
units added by that movement.
The object of the invention is to provide
means for adding columns of figures by machin-
15 ery; and it consists in the construction and
combination of parts forming an adding-ma-
chine, hereinafter described and claimed.
Figure 1 is a front elevation of my inven-
tion. Fig. 2 is a longitudinalvertical section
20 at x of Fig. 3, which is a side elevation with
the side covering removed; and Fig. 4 is a plan
view of the same.
A is a ratchet - toothed wheel, having one
hundred teeth. It is journaled at its center
25 by means of a shaft, a, bearing in the front
and rear sides of the case B.
C is an arm journaled upon the same shaft,
a, to carry a spring-pawl, c, always in the same
relation to the teeth, in order that it may be
3o always ready to engage them. The arm C is
connected by a rod, D, to a lever, E, which is
pivoted to the frame at b. This arm has up-
ward movement to rotate wheel A nine teeth
or less by means of arm C and pawl c. The
35 weight of parts C D E tending to return lever
E to a position of rest on the frame is assisted
by a spring acting between arm C and the
frame B. Lever E is operated by means of
levers or digits G, pivoted at g near their cen-
to ters, so as to balance thereon, the forward
ends of said digits being pressed down by the
fingers of the operator, one at a time. The
digits are plainly numbered from 1 to 9.
Digit 1, when pressed down, raises lever E,
carrying pawl c and the wheel engaged there-
by one tooth, and a spring-pawl, d, located at
any convenient part of the circle of wheel A,
retains it, the lever E and digit 1 returning to
their normal positions as soon as the oper-
;o ator's finger is removed. In the same man-ner the pressing down of any digit advances
the wheel the number of teeth corresponding
to the numeral of that digit. Each digit is
provided with an adjustable stop-screw, f,
fixed in the frame, against which screw the 55
top side of the rear end of that digit abuts at
every movement, thus preventing it from
moving the wheel more teeth than are due to
its numeral. The adjustability of the screw
is for the purpose of preventing a tooth being 60o
moved a fraction of a tooth-space too little or
too much.
II is an index hand or pointer fixed upon
the out end of shaft a, to rotate over a dial, I,
which is divided into one hundred equal 65
spaces, marked from 1 to 100. As a matter of
convenience in reading, the decimal places are
left blank in the circle of numerals, and the
decimal numerals are placed on an inner cir-
cle opposite said vacant spaces. Now, sup- 70
pose digits 7 and 9 to be in turn pressed down;
sixteen teeth of a wheel, A, will have been
moved past a given point, and pointer II will
stand at 16 on the dial, showing the sum of
the addition, and so on ivith any set of num- 75
bers added together, not to exceed 100 in
amount. I find that a single ledger-column
veryseldom amountsto 200. Therefore I have
not thought it worth the extra expense to
adapt any particular means of registering the 80o
number of revolutions of the pointer, as each
revolution represents 100 ; yet I show two
methods of making such registry. Let shaft
a be provided with a small pinion-wheel, h, of,
say, ten leaves. Let it engage a spur-wheel, 85
i, journaled to the dial, having any number of
teeth of which said tell is a multiple-say
one hundred. Let said spur-wheel have an
index marked 1 2 3, &c., for each ten teeth
passed over. Thus the figures will indicate go
the number of revolutions of the wheel, and
consequently stand for the hundreds of the
sum added.
To add a column of figures the operator has
only to press down the digit corresponding to 95
each figure of the column, and the sum will be
indicated on the two dials. Supposing the
figures to be added stand in two or more col-
umns-as units, tens, hundreds, &c.-and that
the sum of the first or right-hand column is ioo
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Barmore, Albert King. Adding-Machine., patent, February 12, 1884; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth170702/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.