Random dice to simulate a dierolling, a random integer between 1 and 6 can be generated by. One is socalled cut curtas, sold as rare demonstration models. Bill of materials, and build manual are in the caption under the first image. A mechanical calculator, or calculating machine, is a mechanical device used to perform the basic operations of arithmetic automatically. To complicate matters, volatile compounds in the original lubricating oils can evaporate, leaving behind a sticky residue that impedes the movement of. Vintage curta calculator type 1 1966 w original box, case and instructions. Ernie jorgenson with office machine americana is now offering copies of two curta. The curta manual the curta manual is a transcription of the curta manual titled your curta calculator on one side and the 4 arithmetical rules on the other. The curta german calculator poster is very suitable for framing and will make a wonderful gift to any curta enthusiast. Curta type 1 for sale immaculate conditon, 0, darthandalf, 279, sat 3d printed curta calculators introducing the classic curta. The poster measures 24 12 62cm in width and 16 41cm in height and is.
If you need hep, consult the manual section of the presentation. To those who are familiar with old mechanical calculating equipment, the name brings to mind thoughts of high precision machining, extreme mechanical design, and, to those whove been lucky enough to use one, the wonderful feel of the mechanism in operation. Curta calculator instruction manuals, flints auctions. Designed in the 1940s before electronic calculators, this hand. The curta calculator was the top of the line calculator in its day and was immensely popular before the handheld electronic calculator essentially made them obsolete in the 70s. To complicate matters, volatile compounds in the original lubricating oils can evaporate, leaving behind a sticky residue that impedes the movement of sliding gears and levers. Due to the high cost of the early electronic calculators, many mechanical calculators like the later ones shown here were produced into the early 1970s. Here are some helpful email snipets from nicholas bodley and jack christensen plus some scans from the curta service manuals. Innovative products bring joy, create new lifestyle and pave the way for related economies especially, if they have been developed by casio. Type 1 curta calculator models have 8 input registers, a 6 digit crank turn register, and an 11 digit result register.
Here is a list of the actual title of all the known manuals. I am overwhelmed by the great reception my work is receiving and i want to say thank you to the thousands of people who looked and the. Where we have several copies of a particular item, the original manual is offered. In conclusion, the curta mechanical calculator would have been the calculator of choice before the advent of the hp35 calculator, the first scientific electronic pocket calculator that was able to perform trigonometric and exponential functions and which signaled the end of the reign of the curta mechanical calculator. Sean charlesworth joins us in the tested office this week to share one of his prized possessions. If we have only one copy, we will provide a clean photocopy.
Vintage curta type ii calculator early portable handheld calculating machine. It is an essential element in any curta collection. I want to contribute to the web community with pictures, user manuals and technical information about this items. I have for sale curta calculator instructionthey are used and have obvious marks that come with age. The instructions and exercises herein apply both to curta model i 8x6x11 digits and curta model ii 11x8x15. Get the best deals for curta mechanical calculator at. The user manual is called your curta calculator, a 24page 367kb pdf file. Curta calculating machine, type i calculator wmanuals. Over time, some of these varied by layout but remainded much the same in content. The curta may seem awkward to use for those of us used to electronic calculators. Curta calculator instruction manual for use of the curta booklet in english. Page 2 the instructions and exercises herein apply both to curta model i 8 x 6 x 11 digits and curta model ii 11 x 8 x 15 digits. Many of the early ones are very rare and are only to be seen in books and museums. Thank you so much for making this available freely.
Computing examples for the curta calculating machine. If original paperwork is not stipulated, an excellent english language reprint of continas instruction manual entitled, instructions for use of the curta will be provided. The curta calculator requires regular maintenance to prevent acummulating dirt and dust from binding the mechanism. Curta calculator instruction manuals,instructions for use of the curta, contina ltd, 46pp, with curta, calculation techniques, london office machines ltd, approx.
The instructions and exercises herein apply both to curta model i. The curta s design is a descendant of gottfried leibnizs stepped reckoner and charles thomass arithmometer, accumulating values on cogs, which are added or complemented by a stepped drum mechanism. Many of the current and recent model instrument manuals can be downloaded for free from the cstberger website selfhelp section. This is an introduction to the uses of the curta calculator as a rally computer. The curta calculator, a small cylindrical math machine with a handcrank on the top, was first dreamt up by curt herzstark in the 1930s who finished its.
A curta calculator case but perhaps that was a bit premature. This retro mechanical calculator has gorgeous 3dprinted guts. The curta calculator combines the precision of a swiss watch, the craftsmanship of an old. Most mechanical calculators were comparable in size to small desktop computers and have been rendered obsolete by the advent of the electronic calculator surviving notes from wilhelm schickard in 1623 reveal that he designed and had. Calculated industries electricalc pro user manual pdf download. Get the best deal for curta calculators from the largest online selection at. Casio fx 991ms scientific display calculator user manual 42 pages. Unfollow curta calculator to stop getting updates on your ebay feed.
Ive always wanted a curta calculator but theyre so expensive, and i have yet to find anything i really wanted to make on my 3d printer. Depending on when they were made, a type 1 curta calculator body can be made of either plastic or metal. This website shows my personal collection of curta mechanical calculators, vintage electronic calculators, personal and small computers and other calculating devices. Feedback on this build manual is desired and welcome help me improve it for others please. May 03, 2017 feedback on this build manual is desired and welcome help me improve it for others please. Dec 31, 2017 for the love of physics walter lewin may 16, 2011 duration. These two models being identical but for their capacity, it has been deemed. No new posts, curta mk ii for sale glasgow, scotland. Made in liechtenstein by contina ag mauren type i no. Dec 24, 2014 in december 2014 i made six short videos. This table allows your curta to make squate roots with a precision of 5 digit quickly.
There were a lot of variations on style and trim, but they all work the same. There were several different versions of the consumer operating manuals produced. The curta calculator poster is very suitable for framing and will make a wonderful gift to any curta enthusiast. It is a small, handcranked mechanical calculator, designed in 1930s, but introduced as late as 1948. The curta calculator simulation is a 3d recreation of the original portable mechanical calculator, invented by curt herzstark. The astounding curta is very famous, and deservedly so, for its extremely compact and pleasing design, as. Curta calculator instruction manual for use of the. Regardless of the body material, all type 1 curta calculators are functionally the same.
An original scientific american magazine publishers tear sheet of their january 2005 article, the curious history of the worlds first pocket calculator, will also. Others were not so much an operation guide as a list of example calculations and methodologies. Adam walks us through his collection of analog calculators, culminating in one of his newest favorite objects. Curta type i calculator university of toronto scientific. View and download calculated industries electricalc pro user manual online. The curta is a small mechanical calculator developed by curt herzstark. Therefore, to obtain best results and efficient service from your machine, never handle roughly or attempt to force its mechanism. The curta of curt herzstark see biography of curt herzstark is a remarkable mechanical calculator, based on the stepped drum mechanism of lebnitz. As you can see in extra pictures a small ring has come away and i have the piece.
Page 1 your curtacalculator is a highquality precision instrument, fitted with automatic safety locks to prevent operators errors. The curta calculator was available in two basic models, model i 8 x 6 x 11 digits above, and model ii 11 x 8 x 15 digits below. Type 1 curta calculators are the smaller of the two models and are made of either plastic or metal. Curta mechanical calculator type ii accurate handheld liechtenstein herzstark 1. Introducing the classic curta calculator poster for all curta fans. A stepped gear type calculator capable of the four functions, and more using special techniques. Casio user s guide calculator fx95ms, fx100ms, fx115ms, fx570ms, fx991ms. Production continued until 1972, but by then the introduction of the much cheaper electronic pocket calculator proved impossible to compete with and the little mechanical marvel was withdrawn from the. It has an extremely compact design, a small cylinder that fits in the palm of. Curta calculator type i pristine condition the finest mechanical calculator of the world first pocket calculator t are no sings of wear on the surface, not even at the bottom plate and under the clearing ring.
The curta soon developed a cult following, but by 1966 contina was on its last legs and sold the rights to the curta to the swiss company hilti. Curta with 12345789 set and the crank turned once, as shown by the 1 appearing in the white. Mechanical calculating machines date from the early 1600s see the calculator timeline section. Curta open automatic business machines limited 15 cromwell road london s w 7 telephone kensington 8877 on the cylinder body. Curta calculators were made in two distinct models. Early electronic calculators werent very reliable, couldnt handle many digits, and broke easily, so the curta still had diehard users. Here is the full list of manuals, brochures, images, etc. Curta mechanical calculator type i with case system curt herzstark contina ag mauren liechtenstein. Therefore, to obtain best results and efficient service from your machine, never handle it roughly or attempt to force its mechanism. I get asked all the time about how to clean and lubricate the curta. Unlike modern electronic calculators, the curta was entirely mechanical. I am looking forward to finishing up the painting on the curta, making a project completion post, a video build manual, and finally removing the work in progress tag from the project on thingiverse. The curta calculator page the calculator reference.
1256 7 668 709 1199 1240 61 1221 160 1383 872 566 1060 1322 1141 184 64 239 1182 1230 76 347 1365 701 68 77 1286 452 392 1123 1432 1139 1078 436 13 65 282 1491 975 85 389 1237 14 1312