†††††††††††††††††††††† †††††††††††††


†† ††††Loading a tape




Start of cipher text





††††††††††††††† Start hole



†† Tape layout guide



†††††††††††† Tape guides



†††††††† Image aperture


†††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† †††††††††††††††††††††††††††††††††††




†† †††††††††5†† 4†† 3†††† 2†† 1


†††††††††††††† The image is reversed by the projection lens so the sprocket cell is third from the left.


†† Starting with the start of the cipher text on the paper tape,

†† the tape is first taken upwards over the drive motor pulley 1.

†† It then comes down and round the first large tape pulley 2 back

†† up to go over the first pierced multi-track pulley 3. It sits on

†† the back of the three tracks and the goes horizontally to the

†† right to go over the rear track of the next multi-track pulley 4.


†† Now it comes down vertically to the bottom right multi-track

†† Pulley 5. It loops round this and then goes up and slightly left

†† to go over the adjustable multi-track pulley 6. Then down to the

†† bottom left hand pulley 7. Round that and right up to the top

†† left hand multi-track pulley 3.


†† This sequence is now repeated until the length of the cipher

†† text tape has been absorbed.


†† Finally the tape leaves the bottom right hand pulley and goes

†† across to the lower of the two solid pulleys 8. By going round

†† this it joins up with the start of the tape which has come

†† down through the tape guide in front of the illuminating lamp.























The tension on the tape is set by moving up or down the centre multi-track pulley 6 on its girder and then by using the screw adjuster behind the pulley to get the final tension.


The tension is probably correct if the centre of the long vertical section can be moved by finger about one inch horizontally.


The tape reader is then switched on by putting down the 1940ís light switch on the left hand centre vertical girder of the bedstead.