Adding and Subtracting Machine Page: 3 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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BEST AVAILABLE COP'
1,861,9492
To add, the appropriate carrier wheels
are turned in one direction and to subtract
the carrier wheels are turned appropriately
in the reverse direction. It will be under-
.5 stood that at each complete rotation of one
of the carrier wheels the registering wheel
to the right thereof and which is geared
thereto will be correspondingly turned and
the registering wheel to the left thereof will
10 ' be turned through one-tenth of a revolution
by the engagement of the tappet 14 with
one of the tappets 23. Hence, the naught or
ten will be carried from one column into
the next higher column throughout the
15 series, as will be understood.
While I have herein shown and described
a preferred embodiment of my invention,
I would have it understood that changes
may be made in the forms, proportion and
20 construction of the several parts without
departing from the spirit of my invention
- and within the scope of the appended
claim.Having thus described my invention, I
claim, 25
In : I adding and subtracting machine, the
combi "ation of a casing' having openings,
regist! uing 'wheels independently revoluble
in sai . casing opposite said openings and
havi spur gears and also having .lateral 30
pi ; in circular series, fixed disks or guide
W 's arranged in spaced relation and each
i. .nement with one of the registering
wheels and each having in its periphery and
one side a recess, gears arranged and adapt- 35
ed to rotate in said recess and intermeshed
with - the spur gears of 'the registering
wheels, carrier wheels revoluble in the spaces
between the fixed disks or guide wheels and
having spur gears intermeshed withthose of 40
the registering wheels and also having 11e
ripheral sockets) 'and .a tappet 6iirried by
each carrier wheel for cooperation with the
pins of one registering wheel.
In testimony 'Whereof I affix my signature. 45
DUKE WITTNEBERT.
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Wittnebert, Duke. Adding and Subtracting Machine, patent, September 21, 1918; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1257628/m1/3/?q=%22~1%22~1: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.