Calculating - Machine Page: 2 of 3
This patent is part of the collection entitled: Texas Patents and was provided to The Portal to Texas History by the UNT Libraries Government Documents Department.
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UNITED
STATES
PATENT OFFICE.
IIENRY M MINNIS, OF WYLIE, TEXAS, ASSIGNOR OF ONE-IIALF TO TOM O.
STAPLES, OF SAME PLACE.
CALCU LATINGMACHINE.
SPECIFICATION forming part of Letters Patent No. 593,675, dated November 16, 1897.
Application filed November 30, 1896, Serial No, 613,934. (No model.)To all whom it 1myal concern.
Be it known that I, HENRY M. MiNNIS, a
citizen of the United States, residing at Wy-
lie, in the county of Collin and State of Texas,
5 have invented certain Improvements in Cal-
culating-Machines, of which the following is
a specification.
This invention relates to machines for niak-
ing rapid and accurate calculations, and to
ro that class of machines employing rotary dials
and suitable indicating and operative devices.
The invention consists of the novel combi-
nation and construction of parts hereinafter
fully described, and pointed out in the claims.
15 Reference is had to the accompanying draw-
ings, forming a part of this specification.
Figure 1 is a plan view in detail, showing
enough figures to illustrate the use of the
machine. Fig. 2 is a vertical sectional view
20 Fig. 3 is a side elevation of the registering-
pin.
Similar characters of reference indicate the
same parts throughout the several views.
The device is mounted on a suitable board
25 A, which may be made of wood or other ma-
terial. A socket R is inserted in the center
of this board. A disk B, having a suitable
aperture in the center thereof, is placed on
the socket. A disk II is placed next to the
30 disk B and rests on the annular shoulder C
on the socket R. Another disk K is placed
next to disk II on an annular shoulder g on
socket R. Disk H is smaller in diameter than
disk B and disk K is smaller than disk H.
35 A nut b rests on top of socket R. A socket-
bolt b, having a head countersunk in board
A, runs up through socket R. An arm M is
pivoted on bolt b, and is held on the bolt by
a nut a. This arm is made of some metal
40 that will be elastic and is made thin near the
pivot. Nut d is screwed down to clamp and
hold disk K stationary. Washers are to be
added, if necessary. Disks II and B are made
to rotate. Disk II has a row of holes near
45 the outer rim. A rack is made on the rim of
disk B. Arm M has a pin n inserted there-
in and pointed downward and adapted to reg-
ister in the holes about the rim of disk Ih
Pin m is beveled near the point, so that it
50 will catch in the holes and carry disk II around
when turned in the direction of the hands ofa clock and will slide over these holes when
turned in the opposite direction. Arm M has
a suitable tip or button n, by which it is oper-
ated. Disk B is operated by means of a bar 55
E, which is pivoted to a lever F, which is piv-
oted on the board A. This board is cut away
so that lever F will have space in which to
be operated. A spiral spring P is attached
to bar E and to board A. A recess is cut in 6o
board A for spring P and bar E, and these
parts are covered over, except the tip r, which
projects up and is adapted to catch in the
teeth on the rim of disk B. A slot is cut in
the covering of the recesses in the wood for 65
the movement of tip 7'. A pull on lever F
will move disk B one tooth, and this counts
one hundred. Every time lever F is pulled
the tip r catches behind a tooth. When le-
ver F is released, spring P will draw bar E 70
and lever F back in place. An arm X is at-
tached to disk H and has the outer end bev-
eled and rounded, so that it will press back
the bent-up portion of lever F, this lever be-
ing bent up for this purpose. When arm X 75
passes the bent-up portion of lever F, lever F
moves far enough to cause bar E to move
disk B one tooth. This counts one hundred
also. Another short arm D is attached to
disk B, and another disk W is mounted ad- So
jacent to disk B and has a rack on its rim.
Arm D operates this disk. When disk B
turns around once, the arm X turns disk W
one tooth. This counts ten thousand. Every
rotation of disk B causes disk W to turn one 85
tooth and consequently count ten thousand.
Adjacent to each is written or printed or
stamped a number beginning with "10,000."
The numbers will then run "10,000,""20,000,"
"30,000," "40,000," &c., up to "250,000," 90
and further, if desirable. The disks are to
be made of any suitable material and may
be of any practical size. Each disk bears a
row of figures, as illustrated. Disk K remains
stationary. For convenience in locating the 95
numbers on disks K and Ih a circle of larger
figures is placed by fives on the inside of
the figures on disk K. For counting figures
in one, two, and three columns disks K and
II are used; in four columns use disks K, HI, 100
and B; in more than four columns use all the
disks.
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Reference the current page of this Patent.
Minnis, Henry M. Calculating - Machine, patent, November 16, 1897; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth508632/m1/2/?q=%22%22~1: accessed July 11, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.