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Known serial numbers
Right-hand side of the Carriage with the cam, which is attached to the Triplex carryover transfer cam shaft.
The cam in the Carriage
Enlargement of the cam, with two engraved lines which must be aligned at the time the carriage is fitted.
The shaft which is specific to the Triplex mechanism (Register IV). Below, the bevel pinions and the fingers which operate the carry sense levers.
Top view of the Add-and-carry mechanism. The long cylinder (drum gear), at the top, is coupled with the accumulator and drives the Register IV camshaft.
The stepped drums connected with the Register IV, during a Multiplication.
The Add-an-carry mechanism, in the rear part of the machine, shown from the right-hand side, just before fitting the carriage.
The stepped-drum assembly, with the pinions which slide along the square shafts, in order to have exactly the right position, to be caught by the drum.
This is the electrical motor of a 20BTZG model. It was manufactured in Germany, by Siemens.
The same motor with its trimming condensator.
The second condensator (interference suppression capacitor).
Enlargement of the main condensator, also manufactured in Germany (by Bosch).
The left-hand side, in the foreground, and the links connecting the keyboard to the sliding pinions, in the background.
There are 30 separate links and levers, fitted six layers deep on the outside of the left-hand side plate.
Most of the left-hand levers are associated with the automatic carriage shifts that occur during set-up of operations.
At the bottom of the left-hand side. The two slotted vertical key levers are to clear the count and accumulator registers.
Zoom on a camshaft, which is engaged by the Division mechanism.
There are about 35 links and levers, arranged seven layers deep.
The main shaft gear with its brake arm at rest, steady in a notch in the disk.
The brake arm is up, meaning that the motor has started for one cycle.
The right-hand side. The greatest rotating lever is used to start processing of a Division.
The left-hand side. The last lever, at right, is used to engage or disengage Register IV from Register I.