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Classic Maltese Cross Crookes Tube

Classic Maltese Cross Crookes Tube

$68.56
SKU
683405203971
Weight
1.75 LBS
Availability
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Product Description

Classic Maltese Cross Crookes Tube

Although William Crookes did not directly invent this tube it still bares his name. In 1868 during the last year of his life, Julius Plücker developed a gas discharge tube featuring a cross shaped anode. Plücker wanted to determine wheather cathode rays travle in straight lines. His hypothesis was correct as demonstrated by the cross shaped shadow produced by the anode while electrified. 

Features:

  • Heavy glass construction. 
  • Phosphor coated front which allows for easy viewing of cross shaped shadow. 
  • Cross anode features hinge which is extended or retracted by simply facing the tube up or down.
  • Durable eyelet tube leads, perfect for aligator clips. 
  • Sturdy plastic base.

Operating the Classic Magnetic Deflection Tube:

  • As with all of our Crookes tube, we reccomend either our Classic Ruhmkorff Coil or Classic Induction Coil as a high voltage power supply.  
  • Connect high voltage negative output to round emitter plate lead at the back of tube and and positive electrod to the lead below the main tube via alligator clips.
  • Turn on high voltage power supply and watch as a straight beam is projected across the phosphor screen. 
  • Cross may be extended or retracted by movng tube at a 90 degree angle. Never attempt while tube is energized.
  • Shadow may be manapulated by waiving magnet near tube while operating.
  • Use caution and never handle tube when energized. 

 

 

Product Videos

Maltese Cross Crookes Tube by Active Statics (00:58)
The Maltese Cross Crookes' Tube was invented by Julius Plücker in 1868. Although William Crookes did not directly invent this style of cathode ray tube, it still bares his name as his work had been expanded upon by Plücker. Just as with Crooke's Y tube, it was hypothesized that cathode rays traveled in straight lines. To prove this theory, a hinged cross was placed inside of a partially evacuated tube with a green phosphor screen. When the cross is extended to the uptight position, a shadow appears on the phosphors. In this video, the tube is energized with 50kV from one of our classic induction coils. A magnet is used to attract and repel the charged particles, thus distorting the cross...very similar in operating principle to the television "boob tube" which gained ubiquity almost 100 years later.
  • Maltese Cross Crookes Tube by Active Statics
    The Maltese Cross Crookes' Tube was invented by Julius Plücker...

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