Calculator Page: 2 of 4
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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UNITED STATESPATENT OFFICE.
GEORGE WILSON GOSS, OF ORLA, TEXAS, ASSIGNOR OF ONE-HALF TO CHARLES M.
ACREY, OF CARLSBAD, TERRITORY OF NEW MEXICO.
CALCULATOR.Specification of Letters Patent.
Patented Dec. 21, 1909.
Application filed June 16, 1909. Serial No. 502,571.
To all whom it may concern:
Be it known that I, GEORGE W. Goss, a
citizen of the United States, residing at
- Orla, in the county of Reeves and State of
5 Texas, have invented a new and useful Cal-
culator, of which the following is a specifi-
cation.
This invention has reference to improve-
ments in calculators and is designed to pro-
10 vide a means for solving various mathe-
matical problems, more especially such prob-
lems as occur in the ordinary course of
business.
The present invention comprises a tablet
15 preferably though not necessarily seminir-
cular in shape and on this tablet and mov-
able about the same center are two pivoted
arms, one arm being of a simple pointer
type, and the other arm carrying an index
20 member constrained to move in a certain
definite path with relation to the arm carry-
ing it by a groove or slot in the tablet, said
groove or slot being so shaped as to cause a
proper relation between an index on the
25 tablet described about the pivot point of the
arms to said arms and the index member
carried by one of them so that when the in-
dex carrying arm is moved to a certain point
on one of the indexes on the tablet and the
30 other arm is moved to a certain point on the
index carried by the first arm an index on
the tablet will show the answer to the prob-
lem proposed.
The invention will be best understood
35 from a consideration of the following detail
description taken in connection with the ac-
companying drawings forming- apart of
this specification in which drawings-
Figure 1 is a plan view of the calculator.
40 Fig. 2 is a section on the line A-B of Fig. 1.
Referring to the drawings there is shown
a tablet 1 which may be made of any suit-
able material and be also of any desired
shape but preferably this tablet is semnicir-
45 cular, but under some circumstances may be
in the form of a full circle.
Adjacent to the periphery of the tablet
are a number of concentric series of numbers,
the outer series in the particular instance
50 shown running from 400 to 1200, the inner
series of numbers running from 0 to $60.00.
The outer series of numbers is indicated by
the reference numeral 2, while the inner
series in indicated by the reference numeral3. There are intermediate series of num- 55
bers 4, 5 and 6 which will be referred to
hereinafter.
The several series of numbers are de-
scribed in arcs about a central point where
there is secured a pivot pin 7 extending 60
through the tablet 1 and above the same and
this pivot pin carries two arms 8-9, the arm
9 terminating in a pointing end 10 remote
from the pivot and constituting a simple
pointer. The arm S is also used as a pointer 65
but likewise is shaped to carry certain mem-
bers to which reference will now be had.
Mounted on the arm S is a segmental
strip 11 provided with a radial extension 12
midway of its length, the said extension 12 70
having a longitudinal passage therethrough
for the arm S and being capable of sliding
on the arm S easily while at the same time
the segmental strip 11 is prevented from
rocking on the arm 8. On the edge of the 75
strip 11 remote from the extension 12 is an-
other extended member 13 from which pro-
jects a stud 14 extending through a slot 15
in the tablet 1 and this stud may have a head
16 engaging the face of the tablet remote 80
from that carrying the arm S. A thumb nut
or button 17 on the member 13 facilitates
the manipulation of the instrument.
It will be observed that the slot 15 extends
in a curved path from near the beginning of 85
the index series 2 and 3 across the face of
the tablet in an approximately parabolic
curve approaching the pivot point until near
the radial line of the ending of the index
series referred to. At the beginning of the 90
slot 15 there is a straight continuation 18
tangential to a circle described about the
pivot 7 and at the end of the slot 15 there is
another straight continuation 19 tangential
to another circle described about the pivot 7 95
and at an angle to the first named continua-
tion, the relation of these two straight por-
tions being such that if the straight portion
1S were continued it would intersect the
straight portion 19 near the middle of the 100
latter.
When the arm 8 is moved about its pivot
then the segmental member 11 is caused to
move longitudinally on the arm by the en-
gagement of the stud 14 in the slot 15 and 105
consequently this segment 11 has different
relations to the arm S when the said arm is
in operative relation to different portions of943,779.
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Goss, George Wilson. Calculator, patent, December 21, 1909; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth512717/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.