Eight-Lens Telescope.

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Description

Patent for improvements in refracting-telescopes in which the instrument may be readily and accurately focused by adjustment of the lenses within the telescoping sections; and by having one or more perforated diaphragms for avoiding errors due to spherical aberration, an adjustable and removable transmitter for the light passing through the object-glass, for the purpose of toning the quantity of light. Illustration is included.

Physical Description

[1], 3 p. : ill. ; 23 cm.

Creation Information

Riddle, William Nelson April 28, 1891.

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  • Main Title: Eight-Lens Telescope.
  • Added Title: Eight Lens Telescope,

Description

Patent for improvements in refracting-telescopes in which the instrument may be readily and accurately focused by adjustment of the lenses within the telescoping sections; and by having one or more perforated diaphragms for avoiding errors due to spherical aberration, an adjustable and removable transmitter for the light passing through the object-glass, for the purpose of toning the quantity of light. Illustration is included.

Physical Description

[1], 3 p. : ill. ; 23 cm.

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Texas Patents

United States patents filed by Texas inventors before 1900. A majority of the patents are for agricultural and industrial applications.

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  • April 28, 1891

Accepted Date

  • April 28, 1891

Added to The Portal to Texas History

  • Aug. 4, 2011, 5:55 p.m.

Description Last Updated

  • Aug. 6, 2020, 9:23 p.m.

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Riddle, William Nelson. Eight-Lens Telescope., patent, April 28, 1891; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth172681/: accessed April 16, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.

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