De draaiknop wit/rood werd op rood gezet bij het printen van rittenkaarten. De nieuwe rittenkaart werd er bovenin ingeschoven (waar het klepje opengaat) en de riitenkaart werd geprint met de zones en de prijs. En er kwam dan geen biljet uit.

I like these machines. I just picked one up in a vintage shop with the dark brown keys, a decimal version. It has serial number 44907 so quite a lot earlier. I wonder if they changed colour in a specific year?

Your videos are always interesting, informative, and relaxing. A true hidden gem in the world of KZbin

I love the unapologetic clunk when it prints!

I wasn't expecting a full typewriter-ribbon mechanism in there! I thought it would just emboss, maybe with a little inkpad. Fancy!

I find these things fascinating.... but why?

My old maths teacher advised 'always keep your fingers off the numbers'.

:) I remember playing with an addiator-like calculator (Magic Brain?) more than 50 years ago, and around the same time, I had a teacher who had a miniaturized plastic version of the Pascaline. I recall understanding instantly how it worked.

Cute. A slide rule with a constant... :)

If standard mechanical calculator is a CPU (a computer processor), then this Brunswiga machine shoul be a GPU (a graphic card) 😂😂😂

Looks similar to Walther, but is definitely different because pins here rotates

I'm confused about why the higher order digits in the counter go all askew like that. I don't think I've seen that behavior on Monroe type machines. What's different about the Marchant's operation that makes that happen?

I've been training on a 12 column Model H Comptometer for fun, just to see how fast these are at basic arithmetic using the methods in the freely available Felt and Tarrant user manuals. Essentially just punching in the odd equation here and there, tallying up a few receipts a week, and using it instead of a computer calculator for quick math. The answer is that it's reasonably fast. Usably so. Not as fast as a digital calculator except in some niche cases, but still impressively fast for what it is. For addition, specifically addition of small dollar amounts, these things are lightning fast. In that specific context it's faster than running the same total on a 10 key calculator, but even with other types of numbers it's competitive; a well trained operator would probably beat the more modern machine at all addition. The best method I found is to use the touch method you showed, and work the columns lower order to higher order, 2 or 3 at a time so you don't get your fingering messed up. Multiplication is less fast since you have to look at the keys and chord your hands to effectively type the same number over and over. It's not as fast as using an electronic calculator, but significantly faster than doing the math on paper or in your head. It's only a second or two per multiplication for more simple numbers. It gets significantly slower the bigger the number gets, since the more fingers you're using the more careful you have to be with your presses, and eventually you reach a point where you have to enter the number in 2 parts... but even then it's reasonably fast. Subtraction is somewhere between multiplication and addition in speed once you know the rule. It's just the one press but you do have to think about it for a moment. Division is really not bad if you get used to the rules, and takes maybe 20 seconds to run the decimal places all the way to the right on a 12 column machine. You could calculate more precision by writing down the answer then clearing the register and continuing the division on the last remainder, which is a power that electronic calculators don't usually have but also makes everything take longer. Overall these are fun machines that are still usable if you're nerdy enough to practice on them. They're obviously not the most efficient means to an end for four function math anymore, but they do make running boring, tedious calculations slightly more interesting.

Aside from the Comptometer, a nice hand cranked model L Monroe machine is the one adding machine that really tempts me. I've been on the lookout for the right one for a little while now. There's just something about them: how they took the idea of the already wonderful pinwheel machines and functionally improved on them in every way.

I can't imagine doing that 8 hours a day!

Hola. Me encantaría ver el video en español y no se como hacer.

In your opinion, which machines feel better to use? The early Sumlock or the Model H/J Comptometer?

Honestly I thought I was going mad trying to find something like this to buy on the internet. I remember my family using them in the 70s. Can you really not buy anything like this any more??! It all seems to be digital now, can't I have something that doesn't run of of battery power?!

I trained as a Comptometer Operator when leaving school in the early 1970's. North East England. U.K. We were taught accuracy first, speed later. I loved that job. Happy days.

When I first found your website, then later your KZbin channel, my initial interest lie in (Felt & Tarrant) Comptometers and (Burroughs) Calculators, both basically the same from the operator's point of view, and both machines in which I had had experience working with in my late-teens. Seeing more of your videos, however, I find I'm further intrigued by some machines in which I have no background and not a clue how to operate, such as these pinwheel calculators. (I had seen slightly similar Monroe machines in my youth, not that I could operate them, but I had never seen a Marchant). Your videos are wonderfully clear in both explaining the nature of the machines, i.e. how they work, as well as explaining how to operate them. Thank you for this!

I bet they hoped their patents were enough to keep them out of trouble.

Nice- any idea what the weird dimpling is on the vertical posts at 3:50?

I have one of those with the bill from the Chicago shop.

I like the Portelance label on the Champion model. :) Could a substraction be made on these, by using co-digits and disregarding the carried digit on the left of the number?

Wow. Hardly subtle with the design ripoff.

Hoi Jaap, niet relevant voor deze video maar ik probeer al een tijd contact met jou op te nemen over de Sudoku-generator op je website, die het niet meer doet. Heb meerdere keren naar het mailadres aldaar gemaild maar krijg steeds geen antwoord.

Heyyy Jaap, ik heb zo een zelfde staan en wil die te koop aanbieden.. Heb jij enig idee wat ik ervoor kan vragen??

Very common but interesting machine

Ya oh should do a video on the golden gem. It’s quite a basic yet interesting portable machine.

In the Hugh Jackman movie "the greatest show" ...is this the machine the charecter uses?

I noticed the 'Complements' on the keys, so I'm assuming if one knew the subtraction algorithm that one could, in fact, even subtract on this machine. Although without Comptometer Cut-off keys for subtraction, I suppose the Burroughs' method of loading all the noughts or zeros with nines to the left of the number being taken away would work. There was, however, no printout on a Burroughs Calculator nor on a Felt & Tarrant Comptometer, so the subtraction printout on this would look bizarre to those unfamiliar with it! I can't tell you how much I enjoy your videos and your website! Cheers!

Nice Victor. I couldn’t get mine working. I’ll try again some day.

How do you get the ink/paper for these demonstrations? I've been watching for a while and you often seem to manage it.

Thank you for this informative Video!

I like your tricks!

I just got one of these at a garage sale. It doesn't have the reset instructions, thanks for helping me out!

'PromoSM' 😘

Thanks so much! I have my Grandma's old electronic comptometer and finally got chance to use it. Sadly a lot of the keys seem to be stuck in/be unresponsive... I would love to know to fix it. But the keys that do work are so satisfying! And it makes a fantastic whirring sound when plugged in If only I could do some maths on it!

Yet another mechanical solution to calculate - fascinating. Thanks for sharing in detail, really interesting.

I was reading a paper my father kept from 1955! to see why he kept it to start with...they mention this machine and here i am.

Are subtotals in any way marked as being subtotals? (other than having leading zeros)

Cool to see an original "Portable" branded one of these. I had to go back and check my early Corona branded one to see if it had the same behavior of needing to press the 0 keys, and it does (despite the 0 keys on that one just being red ovals and not actually labeled 0). Interesting too that the rebrand to Corona seemed to coincide with the addition of a actual total key

I saw a similar Walther Calculator made when I believe they were prevented from making fire arms. The body of the machine appeared to be cast in gunmetal and was quite intricately patterned. I did not dare try to work it as there was no way I wanted to break it. We used a Facit version on tanker ships before electronic calculators were more reasonably priced. Chief Officer when working out the cargo would have is office door shut but we could hear the whir whir ting whir of the machine going.

This sounds like one for Karl Pilkington.

“Portable” sure has changed over the years.

That's old technology, but that's a really cool machine.

Could it be that you are supposed to cut/rip off a small strip of that pre-lined paper, and insert that paper strip into the slot where you initially slid the roller into? That would give the user a place to write down results...similar to the other (Belgian?) business adding machine from that era? BTW: You could use Google Translator to translate that extensive French instructions...maybe it talks about those rollers etc. in more detail? Just an idea...

i too am just in love with the ADDO-X now

That is a particularly clacky device.

Fascinating video! I really like the clings and clangs of the calculators. These videos are invaluable and super interesting, please please never stop making them and keep them coming!