#Friden calculator 1946 serial numbers#
#Friden calculator 1946 serial number#

It can be combined with a simultaneous + or - key press to add/subtract a multiple and clear the input Adds multiple of input to the register, and optionally shifts carriage. Move the carriage in the direction of the arrow Here is a quick overview of what the keys and switches do:ДЄdds/subtracts input to/from register, and clears input Serial number 283,020, which means it was one of the last ones made. This model was made from about 1942 till 1948, when the design was modernised. The carriage tabulation mechanism and some of the register wheels which had seized up. It is fully working, though it took me a lot of effort to lubricate and work loose This ACT-10M is in reasonably good condition, with only some minor cosmetic blemishes. 'oval' three-hole connector, a type which is apparently designated PH163, The machine is driven by a 110 Volt electric motor. Keys and switches are to the right of the keyboard. It has aДЇull keyboard with 10 columns and an input display register. It hasДЄ moving carriage with a 20 digit register and an 11 digit counter. 'Silent Speed', which was introduced by Harold Avery in 1934. The Marchant ACT-10M uses the proportional gear mechanism, also known as the This video shows the internal mechanism in action. Here is a video where I demonstrate the Marchant XL.

#Friden calculator 1946 serial numbers#

The serial numbers seem to startДЄt 90000, so it seems that a little over 10,000 of them were made. Segments in this machine are hinged so they rotate when retracting instead of slidingДirectly inwards. Other I have found online, it must be one of the last ones made.

#Friden calculator 1946 serial number#

It has serial number XL100215, and as this is higher than any This model was madeДЇrom 1923 till about 1935. Other than this, it only has some minor cosmetic blemishes. It is a bit difficult to use, and the units digit therefore also won't be cleared by theД«ar. The input pin for the units has broken off, so Retracts at just the right moment during the rotation of the crank so that itД®ffectively acts as if it had fewer teeth. The crank is turned, the Marchant XL has wheels in which a whole segment with 9 teeth With teeth that extend or retract when the input is set, and stay in that state when Internally the XL uses an 'adaptive segment' mechanism. The inputД¬an be cleared by pushing the bar upwards, which pushes all the input pins up to zero. The main register both have a small crank that you can turn to reset them. Subtractions, for use in multiplications and divisions respectively. The switch locatedД«etween the counter and the input selects whether the counter counts additions of The counter at the top right has a pointer indicating theД¬urrently active digit, and this moves whenever the carriage moves. In that direction, or the carriage can be moved a longer distance by using the gripsДЄt the left of the carriage. Pushing the small lever on the front to the left or right will shift the carriage one