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That same year in Germany, engineer Konrad Zuse built his Z2 computer, also using telephone company relays. Their first product, the HP A Audio Oscillator, rapidly became a popular piece of test equipment for engineers. Stibitz stunned the group by performing calculations remotely on the CNC located in New York City using a Teletype terminal connected via to New York over special telephone lines. This is likely the first example of remote access computing. Konrad Zuse finishes the Z3 Computer The Zuse Z3 Computer The Z3, an early computer built by German engineer Konrad Zuse working in complete isolation from developments elsewhere, uses 2, relays, performs floating point binary arithmetic, and has a bit word length. The Z3 was used for aerodynamic calculations but was destroyed in a bombing raid on Berlin in late Zuse later supervised a reconstruction of the Z3 in the s, which is currently on display at the Deutsches Museum in Munich. Hundreds of allied bombes were built in order to determine the daily rotor start positions of Enigma cipher machines, which in turn allowed the Allies to decrypt German messages.

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Curta Type 1, 1a & 2 – calculate the date of production

That same year in Germany, engineer Konrad Zuse built his Z2 computer, also using telephone company relays. Their first product, the HP A Audio Oscillator, rapidly became a popular piece of test equipment for engineers. Stibitz stunned the group by performing calculations remotely on the CNC located in New York City using a Teletype terminal connected via to New York over special telephone lines.

This is likely the first example of remote access computing.

Curta Type 1 Calculator (FIRST MODEL) This is a very early and very rare first model Type 1 Curta calculator. The serial number is The serial number is That would date this within the first couple of years of manufacture back in the late 40’s.

The day this occurs is called the June solstice day. Similarly, for an observer on the South Pole , the Sun reaches the highest position on the December solstice day. When it is the summer solstice at one Pole, it is the winter solstice on the other. The Sun’s westerly motion never ceases as Earth is continually in rotation. However, the Sun’s motion in declination comes to a stop at the moment of solstice.

In that sense, solstice means “sun-standing”.

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View gallery – 17 images If you’ve ever spent time thumbing through back issues of magazines like Scientific American or New Scientist, you may have seen adverts for the Curta — a strange little device that resembles a pepper mill. It cost a shocking amount of money and was claimed to perform all sorts of arithmetic functions purely mechanically and with incredible precision.

Rather than being a scam in the order of upmarket X-ray specs, the Curta lives up to the claims and the story behind its creation has its roots in a Nazi death camp.

The Curta is a small mechanical calculator developed by Curt Herzstark. The Curta’s design is a descendant of Gottfried Leibniz’s Stepped Reckoner and Charles Thomas’s Arithmometer, accumulating values on cogs, which are added or complemented by a stepped drum mechanism. Measuring 53cm x 10cm and dating from the ’s/70’s, this is a.

The Swiss engineer Hans W. Egli was the manufacturer of the very powerful rack and pinion calculator, which had a unique multiplying block and was later widely used also in the U. In he returned to Switzerland and opened a workshop in Zurich. Purchase of the Millionaire Figure 1: Draft of an anniversary publication, Zurich , page 4. The purchase of the Millionaire is confirmed in another document possibly a press release.

No information on the acquisition of a Millionaire can be found in the minutes of the board of ETH Zurich. This is surprising, as such machines were very expensive in those days. At that time, the Polytechnic was mainly working with analog, logarithmic slide rules.

THE CURTA CALCULATOR POSTER

Gathering info on these devices is like finding hen’s teeth; here is what I have found so far, with some help from Haldaman and Belmog. I would appreciate your help to complete the following chronology, also input on any devices that I might have missed. Eventually I may need photos for some of them. Heuer introduces the Autavia range of dash-mount chronometers.

Matchbook with phone number Open matchbook with phone number Social dating party activity Memory cards SD card Draw/Write knowledge learning Mints Roll of Certs, open Snack fresh bad for you sweet Gadget Curta Calculator Nerd Technology Inside jokes BACKGROUNDS Wood 1 Wood 2 Wood 3.

Chumlee gets sent to the Old Man’s house for a simple errand, but takes his time doing it. Clarke ‘s team, from the Great Basses wreck. Navy uniform whose time period of origin becomes the point of a bet between Rick and the Old Man. Corey buys a tattoo kit that he then takes to a tattoo shop to trade for a tattoo , much to the irritation of his father and grandfather. Corey and Chumlee also investigate a gypsy fortune teller machine whose owner is auctioning it off, and refuses to sell it prior to auction.

Roosevelt , dated between and When the subject of Corey and Chumlee’s weight comes up, Rick challenges them to an obstacle course , with the loser required to buy lunch for a week. Presidential campaign buttons from between the s and the s; a Country Craftsman reproduction of an antique spinning wheel ; and a commercial grade, Astra Mega I espresso machine and coffee grinder , which Chumlee wishes to use to address the Old Man’s more frequently napping of late.

A customer also brings in the pipe used by Chris Fowler to break Homer Bush’s leg in But Chumlee doesn’t want any part of the item for obvious reasons. Season 3 —11 [ edit ].

Buy and sell vintage curta calculator type 1 prime serial number free domestic shipping products

They were manufactured from to and around 80, Type I and 60, Type II models were produced. There are some unusual and sought after variants that sell for big bucks but the basic design of them all is the same. The ambitious design led to manufacturing problems and it was unable to compete; manufacturing ceased within a year and only around 4, calculators were built. There was a brief attempt at a revival in leading to a further 1, machines being produced.

Because of their relative scarcity, Alpina calculators are sought after by collectors and museums. Like Curtas, they have generally survived very well and are usually still in full working order.

English Scientific Barometer c A rare mid-nineteenth century scientific barometer with a large diameter tube and a movable scale so that the zero position may be accurately set to the level of mercury in .

That same year in Germany, engineer Konrad Zuse built his Z2 computer, also using telephone company relays. Their first product, the HP A Audio Oscillator, rapidly became a popular piece of test equipment for engineers. Stibitz stunned the group by performing calculations remotely on the CNC located in New York City using a Teletype terminal connected via to New York over special telephone lines. This is likely the first example of remote access computing.

Konrad Zuse finishes the Z3 Computer The Zuse Z3 Computer The Z3, an early computer built by German engineer Konrad Zuse working in complete isolation from developments elsewhere, uses 2, relays, performs floating point binary arithmetic, and has a bit word length. The Z3 was used for aerodynamic calculations but was destroyed in a bombing raid on Berlin in late Zuse later supervised a reconstruction of the Z3 in the s, which is currently on display at the Deutsches Museum in Munich.

Hundreds of bombes were built, their purpose to ascertain the daily rotor start positions of Enigma cipher machines, which in turn allowed the Allies to decrypt German messages. The machine was designed and built by Atanasoff and graduate student Clifford Berry between and The legal result was a landmark:

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True pictures, click on the thumbnail for full size image: Need more info about your Curta? An extensive list of Curtas, slide rules and other calculating devices sold on eBay in recent years.

Ti calculator history the curta calculator, ti calculator history last update: january 26, the ti reference. Ranger boats fs, the ranger® fs is the big water benchmark for total performance a dry, cars dating back to the lancia lambda (introduced in ) to use the famous sliding.

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And looming over it all is the castle on the hill. Vaduz Castle is a proper European royal residence, with portions dating to the 12th century. More fort than fairy tale, its solid stone blocks seemingly melded in to the cliff face. It is aloof, defensive, and very, very permanent. But a few years ago it, and the whole country, came very close to having a “for rent” sign tacked up front.

The prince at the time, Hans Adam II, was a successful billionaire who had helped turn around the principality’s fortunes. But he was getting frustrated with the whole time-consuming democracy thing.

Curta calculator: The mechanical marvel born in a Nazi death camp

Written by Jack Christensen Here’s a rating system to use when determining the quality of a Curta. It certainly is not cast in stone. Please edit these ratings as needed. Many collectors may think it is far too strict. The intent of this rating system is primarily to make it less likely that Curta buyers will be disappointed following a purchase transacted over the internet. As a seller, the rating system will help eliminate a disgruntled buyer because of an inadvertently misrepresented Curta.

Before the electronic calculator, there was the mechanical calculator, a heavy device often about the size of a small computer that cost thousands in today’s dollars. They were indispensable.

History of Calculators, Computers, and Internet “Who controls the past commands the future. Who commands the future conquers the past. Most of the sampling of references given below were easily located using the Google Search Engine. The Art of Counting with Beans [Online]. This Website includes history, pictures, and directions for use. It also contains a copy of an article discussing a contest in Tokyo between a calculator user an American GI and an abacus user a Japanese.

Quoting from the Website: The history of mathematics goes a long way back with devices and methods of calculation. Starting with the ancient Abacus, the slide rule and the logarithms, the mechanical calculating machines, the electromechanical calculators and finally the electronic computer. This site deals mainly with the mechanical calculating machines from a collector’s point of view. Calculators Online Center [Online].

Amazing Old Calculator (Curta) – Numberphile