Recorder as Received 



68 Fig, 22 is a general plan view of the recorder as received, It is 

 especially to be noted that the gauge plate on the left has no stop, thus 

 allowing the writing scriber to operate to the position, 



Altered Recorder 



69 Fig, 23 shows an altered recorder with the time indexing mechanism in 

 place , Here a stop plate for the writing scriber has been added , The stop 

 plate must be adjusted so that the writing scriber clears the timing stylus 

 shank. The shank must operate between the db trace and the perforated holes 

 in the tape. 



Timing Stylus Mechanism 



70o Fig, 24 is a front view of the timing stylus mechanism mounted on the 

 main writing scriber bracket. The spring adjustment for the magnet bar at 

 the top of the relay solenoid is clearly shown at the upper righto The 

 spring tension must be sufficiently light to allow the solenoid to pull the 

 magnet bar freely, and yet return it to the off position without sticking, 



71, The position of the magnet bar in relation to the horizontal holding 

 plate is important because the guiding hinge slots in the magnet bar must 

 be free to move in the horizontal plate „ and yet must not allow the magnet 

 bar to become disengaged,, 



72, Figo 24 also shows the timing stylus shank at the right of the latch 

 lever. This shank makes possible a vertical adjustment for the timing 

 stylus, For this adjustment the lock nut is loosened and the shank is 

 screwed either up or down to permit legible time indexes without tearing the 

 paper*. It is very important that the timing stylus be perpendicular to the 

 paper tape.. If necessary , the spring on the timing stylus slide bar csn be 

 bent to meet this requirement. The tension of the timing stylus slide bar 

 spring against the paper tape is important, but this spring cannot be finally 

 adjusted until all other adjustments are completed, 



73° Fig, 24 clearly shows the marking pins below the writing scriber 

 bracket which impress the db lines on the -waxed-paper tape, Spring tension 

 on the individual marking pins must be enough to permit legible marking 

 but not enough to tear the paper. Accumulation of wax residue must not be 

 permitted , 



Bottom View 



74o Fig 25 is a view of the bottom of the writing scriber bracket with the 

 timing stylus mechanism attached. The upper part of the photograph shows 

 the two terminal screws on which the index relay feed wires terminate. 

 Directly below the terminal screws are the two screws for the horizontal 



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