Manufacturer: PHILIPS
Model: P249
AKA: 8700 251 11 999
Year: 1969
Display: -
Circuits: DTL IC's (163)
Dimensions: 485x350x210 mm
Power type: 220V
Origin: Germany
S/N: 31352
Owner: DEVIDTS Serge
Info: Thanks to VAN DER VEEN Gerard
to help me obtaining this calculator.




The original state of the calculator ^
when receiving on 08 apr. 2001

 

Rather messy solution to hide the absent keys ^
which the P251 model does have.



Internals ^


Internal Prints:
Detail of print 1
Detail of print 2
Detail of print 3
Detail of print 4
Detail of print 5


Mechanical keyboard with Reed-switches ^




Decimal Switch ^


   

 7 Print 'Heads' Assembly ^
 One of the first Dot-Matrix / Mosaic printing systems.
In essence needles which are electronically driven, speed: about 600 points/second.
This made it possible to print about 90 characters/second.
 Publication


   

Printer driving system ^
The white eccentric disc is rotating,
therefore the printhead-assembly is moving horizontally.

 

  

Printer driving system ^
The whole printer-mechanisme is driven by a belt,
(left, underneath the three screws), which is unfortunately broken.
On the same transmission, there's a electronic control,
carried out by a thin disc and sensor.

 



Tranformer and motor for the transmission ^
On the back of the machine.

 



Label on the bottom ^