wheme.blogg.se - Friden calculator 1956

"The Comptometer Super Totalizer, a mechanical calculator" - shows the basic operation of a Comptometer.

"How the Comptometer works" - animated explanations of the Comptometer mechanism.

Videos about the Comptometer on Youtube include: The design of the Model 73A is similar that of most 10-key mechanical calculators produced in the 1940's and 50's. Remington-Rand Model 73A adding machine works. Shows the incredibly complicated mechanism,Ĭrammed into such a small space of this type of machine, at work. "Facit TK Mechanical Calculator Demo": Added Apr 19 "1956 Friden STW 10 Mechanical Calculator Demo": "1956 Friden STW 10 Electro-Mechanical Calculator Restoration": "Square root of 2 on the pepper grinder" (i.e.

"Inside a mechanical calculator" (a pinwheel mechanism) : "Hot to use and operate an antique mechanical calculator" (a pinwheel calculator) : "The Original Odhner (Vintage Calculator)" (using a pinwheel calculator, includes finding a square root): "Ingenious Pocket Mechanical Calculator" (using an Addiator): "How the Arithmometer Works" (stepped-drum mechanism) :

On Youtube, a search for "Mechanical Calculator" will reveal many more videos, some much better than others. "The Calculator Wars: A video history of Japan's electronic industry": "The History Of Calculators Documentary" (from a Japanese perspective):

This especially shows the development of hand-held electronic calculators from the early 1970s to the present, with Paul giving us the benefit of his personal experiences in using them.Ĭovers Corvus models 310 & 311, Hewlett Packard HP-35, and especially the Canon Canola 161S desktop calculator with Nixie tube display. These can give a good understanding of how these machines actually operate.Ī video that comprehensively explains the characteristics and use of 26 calculating devices in Paul's collection, "from ancient history until the present". There are some interesting and educational videos on the YouTube site showingf old calculators in use.