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Glass Radio Antenna Insulators

Click on the Photograph icon to view a photograph of the insulator. The / designation is used to separate embossing information appearing on opposite sides but on the same end of the insulator. The // designation is used to indicate embossing appearing on the opposite end of the insulator. All dimensions given have been rounded to the nearest 1/8".

Top of PageEmbossed Insulators

A.G.K.

    A.G.K. Radio Strains

  1. A.G.K. No 3 {31/2" L x 11/8" Dia., Clear} Photograph
  2. A.G.K. {31/2" L x 11/8" Dia., Clear} Photograph
  3. A.G.K. {31/2" L x 11/8" Dia., Clear} Photograph
  4. A.G.K. {41/2" L x 13/8" Dia., Clear} Photograph
  5. A.G.K. / D.C.J. {41/2" L x 13/8" Dia., Clear} Photograph
  6. A.G.K. No 5 {51/2" L x 11/2" Dia., Clear} Photograph

Fleron

    Fleron Radio Strains

  1. FLERON {33/8" L x 1" Dia., Clear} Photograph
  2. FLERON {4" L x 11/4" Dia., Clear} Photograph

Knox

    Knox Radio Strains

  1. KNOX / KNOX {31/4" L x 1" Dia., Clear} Photograph
  2. KNOX / KNOX {31/4" L x 1" Dia., Clear} Photograph
  3. KNOX / KNOX {37/8" L x 11/4" Dia., Clear} Photograph
  4. Original Box for Knox 31/4" Strain Photograph

LS Brach Mfg Co

    LS Brach Mfg Co Radio Strains

  1. LS BRACH MFG CO // NEWARK N.J. / PAT APLD FOR {31/2" L x 11/4" Dia., Clear} Photograph
  2. LS BRACH MFG CO / NEWARK N.J. // PAT APLD FOR {35/8" L x 13/8" Dia., Clear} Photograph
  3. LS BRACH MFG CO / NEWARK N.J. // PAT APLD FOR {35/8" L x 13/8" Dia., Light Purple SCA} Photograph
  4. LS BRACH MFG CO / NEWARK N.J. // PAT APLD FOR {37/8" L x 13/8" Dia., Purple} Photograph
  5. LC BRACH MFG CO / NEWARK N.J. // PAT APLD FOR {37/8" L x 13/8" Dia., Dark Purple - Embossing Error} Photograph Photograph Unlisted Embossing
  6. LS BRACH MFG CO / NEWARK N.J. // PAT APLD FOR {37/8" L x 13/8" Dia., Dark Purple} Photograph

Pyrex

    Pyrex Radio Strains

  1. PYREX {35/8" L x 11/4" Dia., Clear} Photograph
  2. PYREX {71/4" L x 17/8" Dia., Clear, 4-Rib Straight Style} Photograph
  3. PYREX {71/4" L x 17/8" Dia., Clear, 5-Rib Style} Photograph
  4. PYREX {71/4" L x 17/8" Dia., Clear, 5-Rib Reinforced Style} New Item
  5. PYREX {71/4" L x 17/8" Dia., Clear, 7-Rib Style} Photograph
  6. PYREX {12" L x 21/4" Dia., Clear, 8-Rib Straight Style} Photograph
  7. PYREX {12" L x 21/4" Dia., Clear, 11-Rib Style} Photograph
  8. Original Box for Pyrex 7" Strain Photograph
  9. Original Box for Pyrex 7" Strain New Item

Various Embossings

    Various Embossed Radio Strains

  1. GERMANY {33/8" L x 11/8" Dia., Smoky Clear} Photograph
  2. PAT. PEND. {31/2" L x 11/8" Dia., Clear} Photograph
  3. CONSOLIDATED {31/2" L x 11/8" Dia., Clear} Photograph
  4. INSULA GLASS {33/4" L x 11/4" Dia., Clear} Photograph

Top of PageNo Embossing Insulators - Clear

    Smaller Unembossed Radio Strains

  1. NO EMBOSSING {3" L x 11/8" Dia., Clear} Photograph New Item
  2. NO EMBOSSING {31/8" L x 1" Dia., Clear} Photograph
  3. NO EMBOSSING {31/8" L x 1" Dia., Clear} Photograph
  4. NO EMBOSSING {33/8" L x 11/8" Dia., Light Straw} Photograph
  5. NO EMBOSSING {31/2" L x 11/8" Dia., Clear} Photograph
  6. NO EMBOSSING {35/8" L x 11/4" Dia., Clear} Photograph
  7. NO EMBOSSING {35/8" L x 11/4" Dia., Clear} Photograph

    Largerr Unembossed Radio Strains

  8. NO EMBOSSING {35/8" L x 11/4" Dia., Off Clear} Photograph
  9. NO EMBOSSING {33/4" L x 13/8" Dia., Very Light Straw} Photograph
  10. NO EMBOSSING {37/8" L x 11/8" Dia., Clear} Photograph
  11. NO EMBOSSING {45/8" L x 13/8" Dia., Very Light Straw} Photograph
  12. NO EMBOSSING {45/8" L x 13/8" Dia., Clear} Photograph
  13. NO EMBOSSING {5" L x 11/2" Dia., Light Straw} Photograph
  14. NO EMBOSSING {53/4" L x 11/2" W, Clear} New Item

Top of PageNo Embossing Insulators - Spirals

    Spiral Unembossed Radio Strains

  1. NO EMBOSSING {3" L x 1" Dia., Light Straw - Left Hand Spiral} Photograph
  2. NO EMBOSSING {3" L x 1" Dia., Off Clear} Photograph
  3. NO EMBOSSING {3" L x 1" Dia., Clear} Photograph
  4. NO EMBOSSING {3" L x 1" Dia., Ice Green} Photograph

Top of PageNo Embossing Insulators - Colours

    No Embossing Insulators - Colours

  1. NO EMBOSSING {31/8" L x 1" Dia., Light Blue} Photograph
  2. NO EMBOSSING {31/8" L x 1" Dia., Bright Blue } Photograph
  3. NO EMBOSSING {31/8" L x 1" Dia., Fizzy Light Green} Photograph
  4. NO EMBOSSING {31/8" L x 1" Dia., Green} Photograph

    No Embossing Insulators - Colours

  5. NO EMBOSSING {33/8" L x 11/8" Dia., Very Light SCA } Photograph
  6. NO EMBOSSING {33/4" L x 13/8" Dia., Very Light SCA or Light Pink?} Photograph
  7. NO EMBOSSING {33/4" L x 13/8" Dia., Very Light SCA with Milky String} Photograph
  8. NO EMBOSSING {33/4" L x 13/8" Dia., Light Purple} Photograph
  9. NO EMBOSSING {33/4" L x 13/8" Dia., Dark Green Blackglass}

Top of PageLightning Arresters

A lightning arrester was a vital component of any home radio antenna setup. The arrester provided a path to ground for excess electric currents should the antenna should be struck by lightning. This served to protect the radio equipment from surge damage, as well as the house. Some of the companies that produced radio antenna insulators, also produced lightning arresters. Most were made of porcelain, but some were made of glass, bakelite or plastic.

Judging by the markings on some of my arresters, they were also used for early television sets, as I have two that are marked "Television Lightning Arrester".

  1. VIS-O-GLOW Radio Arrester
    Mfg. by L.S. BRACH MFG. CORP.
    Neon-Tube / Radio's Finest Arrester / You can see it work.
    {41/2" L x 13/8" W x 13/4" H, clear glass}
    This arrester is in mint condition and appears to have never been used.

  2. Original Box for VIS-O-GLOW Arrester
    A slightly beat-up, but still original box for the VIS-O-GLOW arrester. It includes installation notes, company product list, and company information.

  3. VIS-O-GLOW Radio Arrester New Item
    Mfg. by L.S. BRACH MFG. CORP.
    Neon-Tube / Radio's Finest Arrester / You can see it work.
    {41/2" L x 13/8" W x 13/4" H, clear glass}

  4. HOME GUARD / M.M. FLERON & SON
    {33/4" L x 11/4" W x 13/8" H, cobalt blue porcelain}

  5. CORWICO / No 825 RADIO / LIGHTNING ARRESTER
    {33/4" L x 11/8" W x 11/8" H, cobalt blue porcelain}

  6. CORWICO
    {33/4" L x 11/8" W x 11/8" H, cobalt blue porcelain}

  7. SilverTone / LIGHTNING ARRESTOR New Item
    {41/8" L x 13/8" W x 13/4" H, blue porcelain}

  8. Belden / RADIO / LIGHTNING ARRESTOR / Resistor Type New Item
    {33/4" L x 1" W x 11/2" H, NOS, brown bakelite}

  9. Original Box for Belden Arrester New Item
    A new condition original box for the Belden arrester. It includes installation hardware, instructions, and the "One Hundred Dollar Guarantee". This box and arrester are in "New Old Stock" condition.

  10. TV / LIGHTNING ARRESTOR / R M S / N.Y. N.Y. / LA-4
    {31/2" L x 2" W x 21/8" H, cobalt blue porcelain}

  11. Airline / TELEVISION LIGHTNING ARRESTOR / 63-2985 / Montgomery Ward USA New Item
    {31/2" L x 13/4" W x 15/8" H, sea foam green porcelain}

  12. TWIN TOWERS / ELECTRIC FENCE / LIGHTNING ARRESTOR
    / PARRIS BURNS CORP / KANSA CITY USA New Item
    {43/4" L x 11/8" W x 2" H, white porcelain}


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