AN IMPROVED CALCULATING APPARATUS
Year: 1881

page_text: LETTERS PATENT to Henry Harris Lake, of the Firm of Haseltine, Lake,
& Co., Patent Agents, Southampton Buildings, London, for an Invention of
"AN IMPROVED CALCULATING APPARATUS." A communication from abroad
by Hugues Beaucourt, of Villeurbanne, France, Manufacturer of Organs and
Hanime
PROVISIONAL SPECIFICATION left by the said Henry Harris Lake at the
Office of the Commissioners of Patents on the 2nd June 1881.
HENRY HARRIS LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London.. "AN IMPROVED CALCULATING APPARATUS.”
[A communication from abroad by Hugues Beaucourt, of Villeurbanne, France,
Manufacturer of Organs and Harmoniums.]
This Invention relates to an improved mechanical calculating apparatus which is
constructed as follows:-I provide a suitable frame to which the mechanism is
attached. Upon or in this frame I provide a toothed wheel having one hundred
(100) teeth, upon which wheel in front of each tooth there are marked in proper
sequence the figures from 0 to 99. This wheel engages with a pinion connected
with a perforated disc having 9 oponings, through which are seen the figures 1,
2, 3, 4, 5, 6, 7, 8, 9, arranged under the said disc, and corresponding to the nine
teeth of the said pinion. There is also a dial carrying a pinion having ten teeth;
this dial is divided into ten equal parts, and is marked, 0, 100, 200, 300, 400, 500
600, 700, 800, 900, these numbers representing the hundreds. Two openings are
provided, through which the numbers on the toothed wheel and those on the dial
may be seen, and the apparatus is so arranged that if when the number 99 appears
at the right hand opening the aforesaid disc is caused to make one ninth of a
revolution a projection on the toothed wheel will cause the pinion of the dial to
advanco one tooth, so as to present the first hundred at the left hand opening. A
spring is provided to prevent this pinion from rotating to the extent of several
teeth at a time. At each ninth of a rotation of the disc the toothed wheel will be
caused to advance to the extent of one tootli, and will at each movement show, at
the right hand opening of the indicator, a now figure of the series, 0, 1, 2, 3, 4, and

page_text: so forth up to 99, and at the next movement a hundred will be indicated on the
left hand opening, and afterwards the series 0, 1, 2, 3, &c., will re-appear succes-
sively, as well as each hundred of the dial, the latter after each complete revolution
of the toothed wheel.
The indicating figures of the disc inny if desired be on the outside of the same,
and this disc may be replaced by a single notched lever passing over an indicator
of the 9 figures; or by 9 buttons, studs, levers, or pistons, which would cause the
toothed wheel to advance for a number of teeth, according to the figure they repre-
sent; but whichever arrangement may be adopted the principle remains always
the same, which principle has for its result to cause the toothed wheel to indicate n
number which will increase or decrease (according to the direction of movement)
from the number which is shewn by means of the aforesaid disc, either starting
from the 9 or returning thereto.
The chief practical and commercial utility of this apparatus consists in its
application for the purpose of addition, but it may also be advantageously employed
for subtraction, multiplication, and division.
By adding an escapement spring the disc may always be caused to return to its
first position after each number has been indicated.
To more casily bring the dial back to zero a stud may be added to the apparatus
which, being movable in a groove, will allow an india-rubber disc to bear against
the dial, and cause it to rotate very easily by friction.
This apparatus may be made in any suitable material, and may be varied as to
form and dimensions as may be required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Henry Harris Lake in the Great Seal Patent Office on the
2nd December 1881.
"
HENRY HARRIS LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "AN IMPROVED CALCULATING APPARATUS.'
A communication from abroad by Hugues Beaucourt, of Villeurbanne, France,
Manufacturer of Organs and Harmoniumis.
This Invention relates to an improved mechanical calculating apparatus, and is
illustrated in the accompanying Drawing, in which
Figure 1 is a plan or top view of the said apparatus; and
Figure 2 is a similar view, shewing the internal mechanism of the same.
In carrying the said Invention into practice I provide a frame A which carries a
wheel B having one hundred (100) teeth. This wheel is marked in front of each
of tho said teeth in proper sequence with the figures from 0 to 99, and engages
with the pinion C connected with a perforated disc D. This disc is provided with
nine openings, through which may be seen the figures 1, 2, 3, 4, 5, 6, 7, 8, 9, corre-
sponding to the nine teeth of the pinion C. E represents another dial which
carries a pinion F having ten teeth. This dial is divided into ten equal parts, and
is inscribed with or provided with the figures 0, 100, 200, 300, 400, 500, 600, 700,
800, 900, these numbers representing the hundreds. The zero point of the dials E
and B can be seen through two openings H and U. The apparatus is so arranged
that if when the number 99 appears at the opening U the disc D is caused to make
one ninth of a revolution the projection G causes the pinion F to advance the
distance of one tooth, so as to present the first hundred at the hole or opening H.
The spring R is employed to prevent this pinion F from turning to the extent of
several teeth at a time. At onch ninth of a rotation of the disc or dial D tho
wheel B will be caused to advance to the extent of one tooth, and will at each
movement present at the opening U of, the indicator a new figure of the series
0, 1, 2, 3, 4, and so forth up to 99; then at the next movement the dial E will presont
100 at the opening H, and afterwards the series 0 to 99 will re-appear successively,
and each hundred of the dial E will re-appear after each complete revolution of the
wheel B.
The indicating figures of the dial or disc D may if desired be on the outside of
the same, and this disc may be replaced by a single notched lever passing over an
indicator of the nine figures, or by nine buttons, levers, or pistons, each of which
causes the wheel B to advance for an equivalent number of teeth to the figure it
represents; but whichever arrangement is adopted the principle remains the same,
with the result of causing the wheel B to indicate a number which (according
to the direction of movement) will augment or diminish the sum, shewn by means
of the disc D, either in starting from the figure 9 or returning thereto.
The chief practical and commercial utility of this apparatus consists in its
application for the purpose of addition, but it may also be advantageously employed
for subtraction, multiplication, and division.
By adding an escapement spring the disc D may always be caused to return to
its normal position after each number has been indicated.
To more readily bring the dial E back to zero a stud K may be added to the
apparatus, which stud being movable in a groove will allow the india-rubber disc.M
to be brought into contact with the disc or dial E, and cause it to rotate very
easily.
The method of operating my improved apparatus is as follows:-Assuming that
it is to be used for addition, and that zero is indicated at the two openings U and

page_text: H, then presuming the first column, viz., that of units to be 3, 7, 6, 2, 9, and so
forth, the disc D is moved from the figure 9 to the figure 3, and 3 will be indicated
at the opening U. The disc D is then carried from the figure 9 to the figure 7,
and 10 will be indicated at the opening, and so on, the disc being successively
carried or moved round from the figure 9 to the figures 6, 2, 9 in the direction of
the arrow f. The total is thus ascertained. Assuming the total to be 207, the
figure 7 is put down and the 20 are carried forward. Prior to the adding up
of the column of tens the number 20 should be brought opposite the opening U.
The operations necessary for the addition are then proceeded with in the same
manner as when the addition of the units is effected, and so on for cach column.
In using the said apparatus for subtraction, and assuming that the openings or
sightholes show 203, and that 7 are to be deducted therefrom, then I rotate the
disc D in an opposite direction to that of the arrow f, so as to bring the figure 7 to
the 9, the indicators will then register 196. In a like manner all the multiples of
the first nine figures may be subtracted according to whether they are deducted
once, twice, or more times from the number shown at the openings. In multipli-
cation the disc D is so moved that if the figure 9 is brought, say, four times to 5,
then the product 20 will be indicated.
For division, if the number 84 is indicated at the openings or sightholes, and it
is desired to divide it by 8, the figuro 8 is moved from left to right to the figure 9,
passing it over the figures 7, 6, 5, 4, 3, 2, 1, 9; when this movement has been
effected 10 times the figure 4 only will appear, this giving 10 as the quotient and
4 as the remainder. This apparatus may be made of any suitable material, and
may be varied as to form and dimensions as may be required.
Having thus fully described the said Invention, as communicated to me by my
foreign correspondent, and the manner of performing the same, I wish it under-
stood that I claim,—
The improved calculating apparatus constructed and operating as above set
forth.
In witness whereof, I, the said Henry Harris Lake, have hereunto set my
hand and seal, this Second day of December, in the year of our Lord
One thousand eight hundred and eighty one.
174
HENRI D. LAKE.
(L.S.)