Traditional pinwheel calculators.
Facit "Standard"
Digits: 9 keyboard, 10 counter, 15 accumulator
Dimensions: 170W x 170D x 140H, overall width 310mm
Weight: 6.8 kg
Manufactured: Sweden, 1924-1931
The "Standard" was the second machine to carry the Facit brand, and the first to be built under Atvidaberg Industries.
This is an early machine from the 1920s, on an original wooden base. The base has been shortened on the right-hand side at some stage in its 80-year history, and the cover has been lost. The mounting for the the lock can be seen towards the right-hand front, at what would once have been the centre.
The rotor has 9 places, with a quick-clearing lever at the left-hand side. The 10-digit counter register is fixed in the body of the machine above the setting levers, with a 15-digit accumulator mounted in the moving carriage. The tens-carry on the accumulator extends to 13 places, with an overflow bell mounted externally on the left-hand end of the carriage. The counter and accumulator are cleared with just half a turn of the large wing nuts.
The counter register on this machine uses complementary red and white figures. Later versions (1928-31) provided a full tens-carry mechanism.
The carriage can be moved one step in either direction by pressing the two keys at the left front of the machine, or it can be moved continuously by turning the large knob on the left-hand side. One of the ten keys along the front is pressed down to raise an internal stop, and the knob is turned to bring the carriage rapidly to the required position. The stop keys are numbered on the metal escutcheon plate, and the active position is clearly shown through a peep-hole above the centre of the carriage. The positioning mechanism operates through a lead-screw, so that the carriage remains firmly in place with no ratchets or detents.
May be just maybe