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Cleartron Vacuum Tube Company

Cleartron Vacuum Tube Company, 28 West 44th Street, New York, New York, USA



First seen: 02-Jun-1924
Last seen: 14-Mar-1926

Brand(s): Cleartron

Founded by Maurice S. Haynes, Cleartron registers several trademarks in 1925, indicating they have been in business since 2-Jun-1924. Further research is planned to see if there is a relation between this Haynes and the Haynes brands of the 20's.

As a major technical aquisition, Haynes hired Capt. Samuel C. Miller as the chief engineer and researcher for Cleartron. Miller had worked for Deforest during the war, then joined RCA's research department from inception. Sam Miller brought what must have been a treasure trove of first hand experience in designing and producing tubes. Mr. Miller's obituary gives insight into his impressive accomplishments and career.


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Cleartron stands out as unusual, in that they seem to never have switched to tipless tubes. This may be a clue to their production situation, as BKTT tubes are quite specific to a small window of time.

 


Registered 17-Feb-1925
claiming use since 2-Jun-1924.[1]

Registered 14-Apr-1925
claiming use since 2-Jun-1924. [2]

Registered 25-Aug-1925
claiming use since 13-Mar-1925. [3]


Cleartron tubes appear in the Nov 1927 issue of Radio Retailing, pg. 94. They did not appear in the Nov 1926 issue.

Cleartron Vacuum Tube Co. took part in the original anti-trust lawsuit against RCA. They did not receive a license in 1930.

Cleartron variants:

 
C T
L R
E O
A N
R
CT-201-A
1
Tube
{v1} Globe, short bakelite base, tipped


variantname
Brand variant
 
 
 
 

{v1} "Cleartron" "CT-201-A" with envelope label.


C T
L R
E O
A N
R
CTX-201-RF
1
Tube
{v1} Globe, short bakelite base, tipped


C T
L R
E O
A N
R
CTX-101-A
1
Tube
{v1} 'High Constron', tipped


C T
L R
E O
A N
R
CTX-200-A
1
Tube
{v1} Globe, short bakelite base, 6v DC, 45v plate, 0.25amps, detector


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Bibliography references:
  1. Proceedings of the Institute of Radio Engineers, 1953, pg 807, excerpt. 
  2. Official Gazettt US Patent Office, 17-Feb-1925, vol. 331, pg. 508. From Hathitrust.org. Retrieved 02-May-2019 *
  3. Official Gazette US Patent Office, 14-Apr-1925, vol. 333, pg. 296. From Hathitrust.org. Retrieved 02-May-2019 *
  4. Official Gazette US Patent Office, 25-Aug-1925, vol. 337, pg. 758. From Hathitrust.org. Retrieved 02-May-2019 *
  5. The Hartford Courant, 14-Mar-1925, pg. 17. From Newspapers.com. Retrieved 02-May-2019 *
  6. The Des Moines Register, 05-Apr-1925, pg. 74. From Newspapers.com. Retrieved 02-May-2019 *
  7. The Standard-Union, Brooklyn, NY, 17-May-1925, pg. 14. From Newspapers.com. Retrieved 02-May-2019 *
  8. Radio Broadcast, Oct-1925, pg. 832. From AmericanRadioHistory.com. Retrieved 01-May-2019. *

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