- Calculating Machine The idea for the Millionaire Calculator design was first patented in 1892 by Otto Steiger of Munich Germany. Steiger's
design was later improved upon by Hans W. Egli of Zurich Switzerland. The
tag on the left side of this example has the Egli name. This example
is also marked with two US patent dates from 1895. Production of
the Millionaire Calculator began in 1893 and ended in 1935.
A total of about five thousand were manufactured. From the serial # 1633 we
can assume this example dates from just after the turn of the century. There is an online registry for these
calculating machines found at John Wolff's Web Museum / Register of Millionaire Calculators. He has a number of examples listed,
(over 200) and many examples are pictured there.
The Millionaire calculator was the first
commercially successful mechanical calculator that could perform direct multiplication.
Other calculating machines of the period were adding machines that accomplished
multiplication by preforming addition calcs over and over. A much slower process. This aspect
of the design is explained in great detail at the www.history-computer.com site. The tag on the left indicates
this example was sold here in the US. The tag reads W. A. Morschhauser
Sole Agent Madison Ave New York City. I read these machines retailed
for between $475.00 and $1100.00 at the time of manufacture. A huge sum for the time.
Note the exceptional condition. This
Antique Millionaire Calculator shows very little signs of use and
mainly just storage scuffs. This is the less common metal case model. The Millionaire Calculator also
came in wooden cases. Overall It is in very nice condition with
typical scratches. On the interior, the areas under the swinging arms still have nearly all of the original
black finish. Many examples you can view online show considerable wear
in these areas. It is a large and heavy machine. The measurements are approx. 7 1/4" x 25 5/8" x 11 1/4". It weighs close to 70 lbs. and is
the 8 column model. They could be had in larger sizes with up to 12 columns.
A rare opportunity to own a piece of calculation history. Recommended.
K & E / Keuffel & Esser 4012 Thacher Slide Rule / Calculator
(Last Model) This #4012 Thatcher calculator / slide rule is
in super nice condition. The serial # is 6285 and this # can be found
on the original OAK mounting board near the top back edge. Near the
end of production K & E stopped using the typical mahogany
mounting board and outer box and began using oak for the last few hundred
before ending production. This 4012 oak box & base variant is much harder to find than the
earlier mahogany versions. In addition to the K & E serial number
there is also a brass plaque on the base board indicating it was property of the US Navy at one
The inner scales on the drum are
white and very nice. The scales on the outer frame are near perfect as
well. They have hardly yellowed at all and there is no lifting of the
paper scales or spotting to be seen. The instructions on the base
are very nice as can be seen in the pics, . The oak box
is nice noting a few scratches and some loses to the finish. There are no names, initials,
or other carved into the box, base, or calculator.
The Thacher calculator has a near unique sliding drum design whose scales total over 30' long if laid out in a line. Edwin Thacher first patented the
idea for this slide rule / calculator in 1881 in England. The idea was an immediate success with the scientific and engineering
communities. K & E bought they rights to sell and manufacture the popular rule. Stanley initially produced them in England for K & E. and production was moved
to the states near the turn of the century. The Thatcher
calculator was first offered by K & E in their 1887 catalog as the 1740-N. In 1890 they dropped the N. In 1899 they changed the calculators
catalog # to 4012 or 4013.
The 4013 being the upgraded model w/ a built in magnifier. There were approx. 7000 total units made. The inventors name is Thacher, but it was misspelled Thatcher on almost all versions of the calculator that K & E offered,
hence the use of two different spellings of Thatcher / Thacher in this ad and on the rule itself.
A nice piece that will display well and be a great addition to the old office or calculation related collection!! Enjoy.
The Equationor or Universal Calculator Patented & Copyrighted by Walter Hart
The Equationor circular slide rule / calculator patented & copyrighted by Walter Hart is one of the rarest and most unusual
slide rules ever produced. There are no other examples, other than
this one, to be found or viewed with internet searches. There is one article by
Conrad Schure about the Hart Equationor in a 1992 issue of Oughtred Society's publication. Also the Library of Congress has a copy of the
32 page instruction booklet that anyone can download for free as a PDF. Beyond that
there are just resellers trying to market copies of the instructions that
can be had for free further down the page.
The face of the calculator has a wealth of information printed on it. In
the left top corner are the 2 copyright dates from 1888, and 1889. In the
left corner are patents from July 31 1888, and April 29 1890. The 1888
patent # is 387,070 and is titled Sliding Logarithmic Scale. It is viewable with a Google search.
The second patent from April 29th 1890 closely resembles the calculator
as it exists, right down to the sliding magnifier. That patent # is
426,444 and is titled Sliding Calculating Scale. It too comes up with
a Google search.
The simple and ingenious logo Walter Hart came up
with to market his calculating slide rule, that took 32 pages to explain how
to use, was "Arithmetic Without Figuring". Simple Genius.
The condition of this Hart Equationor is exceptional. Many circular
slide rules have a problem with the scales peeling, chipping, or otherwise
deteriorating. Not so here. There is a fine alligatoring texture
to the surface that looks to be factory and not damage. The face is
near flawless w/ one small dent chip. The magnifier is very nice.
The box is original and w/o lid. A super nice and rare piece of calculation history that will display well and be a great addition to the old office,
slide rule, or calculation related collection!! Enjoy.
By Curta - Pickett - Sun Hemmi - Aristo &
N1010-ES Trig 4' Classroom Teaching Aid Slide Rule The
condition of this 4' teaching aid sliderule is very nice. It is
model # N01010-ES Trig rule. It dates from the 1960's or 70's. I do
not think it was ever used. Nice!!
Electric Motors / Dynamos / Fans / Steam Engines / Water
Motors & Other Early Power Devices
Carlisle & Finch
No 27 10 Volt Electric Bipolar Dynamo The tag or maker id info on this early and interesting
open frame exposed coil electric dynamo is at the top. The plate reads
"NO. 27 DYNAMO ~ 10 VOLTS ~ SPEED 1200 ~ THE CARLISLE & FINCH CO. CINCINNATI,
O.". The base is cast iron. The brass drip oilers & connecting terminals are present and the motor
runs. Overall it measures 10'' in length by 5 1/4''
wide and stands 6 1/2'' at its tallest point. Super nice
Small Franklin Bipolar Electric Motor
This small Franklin toy size battery powered electric motor runs. It is built on the
same frame and principle as the small toy Bipolar Edison Motor one sees from time to
time. It have been suggested that they were sold or
given away at one of the expos or fairs around the country that took
place after the introduction by Edison of his light bulbs and full size motors / dynamos.
You actually see more of the Edison branded motor than you do the Franklin.
This tiny motor stands just under 4" tall and has a great look with its
double column exposed windings. It will
display nicely and will be a nice addition to the antique electric, motor,
Americana, or other collection.
F. Sturtevant Co. 1/8 Horsepower Electric Motor
A nice looking Pancake style electric motor that dates from near the turn of
the century. The founder of the company hailed from Maine, but this is
marked Boston Mass where the company was formed. The tag calls it off as being 104 volts and 1200
RPM. There is a Sturtevant history website
that describes the history and more Nice!!
Electric Co. Lundell Motor
This is an odd motor. The tag says 25 in the HP window. 1/4
horse ? surely not 25 horses. In the volt window it is stamped 500.
The RPM is 1600. It weighs a good 50 lbs. Different & Nice.
and Engineer Magazine April 27 1901
I have about 20 issues of this magazine in similar condition. The first
40 or so pages are all advertising. So are the last 10 - 15. The
middle discusses cutting edge developments in the emerging field of electricity
and engineering. There
are ads for all sorts of rare things one could only wish to find. There
are fans, motors, steam engines, light
bulbs, arc lamps, telephone and telegraphy related ads, tools and much more.
The ads near the end mostly deal with larger things like steam engines,
locomotives and large pieces of machinery and tools like milling machines,
lathes and the like. Most
all are in very nice condition noting the covers are very fragile and some are
loose. The interiors on all are nice.
Crouse Hinds 100 Amp - 125 Volt Copper & Bronze Electric Knife Switch This antique knife switch is made of almost all copper & bronze save the Bakelite handle and attaching bar.
It weighs close to 5 lbs.
The switch measures approx. 10" long from handle
to back joint w/ vertical post. The last two of the 1/2" dia. by 1 1/2 long threaded rods
are steel w/ bronze or copper uppers. Note the decorative knurling and cove on
each of the upper bolsters. All of the other 4 contact rods are all
copper, including the threaded rods and nuts as they carried electrical current.
This large electrical knife switch came off a large lighting control
panel made of a marble slab that was disassembled. It dates from right around the
turn of the century. 1900 that is. The condition is excellent. It can easily be mounted to a block of wood,
marble, granite or other material to be displayed or be put back into service. Perfect
for the Frankenstein / Steampunk / Mancave application. Nice!!
Zeitsinnapparat Scientific Psychological Recording Device by Spindler & Hoyer, Göttingen It is a large and graphic instrument at
over 28" across.
This unusual and large scientific apparatus was
designed to measure & record optical and acoustic stimuli.
There is an ID tag on one top arm with the manufacturers name Spindler & Hoyer, Göttingen. It dates from approx.
1900 and is German.
Descriptions online make this type if machine sound like a forerunner of the polygraph
machine. Information also refers to its use in the study of time. There are
numerous line drawings of similar devices using the word Zeitsinnapparat online that all lead to foreign or
German sites. Here is a
linkn to one of those German Scientific sites.
It is unclear how exactly it would
work, but it seems it was meant to be driven by a motor and would be hooked
up to a drum like recording machine similar to those used on steam
Very graphic, and an interesting
and important part of the history of Psychological study. Nice!!
Thomas A. Edison Sign / Banner Approx. 15" across the bottom. On Fabric. Same logo
as the sign above, but not marked other than the Edison name. It has a plastic or
saran wrap like covering on it of which most I removed. Nice!!
"Bomb" 2 Cell Flashlight
This dates from the 30s or so. It turns on. The lens ring can be twisted
to act like a second switch? I think. Marked on back Pat Apld
For. Later versions have a patent date. Nice overall condition.