Weller Manufacturing Co.
810 Packer Street, Easton, PA (1948)

Weller Electric Corporation
806 Packer Street, Easton, PA (1951)

The company started with transformer type soldering guns called Speed Iron. Later production also included resistive type soldering irons.

Weller was founded in the USA in 1945 by Carl E. Weller.

They were aquired by Cooper Tools in 1970; subsequently Weller was one of the brands used by Cooper.

In 2010, Cooper Industries and Danaher Corp. formed the joint-venture Apex Tool Group, with headquarters in Maryland, by merging their Tools and Components segments.

Weller has and had many subisidiaries both as Weller and as part of Cooper Tools and Apex. Known subsidiaries and related companies are (incomplete list):

• Germany
  • The Cooper Group Deutschland GmbH, Carl-Benz-Str. 2, D-7122 Besigheim 2
  • Weller Elektrowerkzeuge GmbH, Besigheim (founded 1959)
  • Weller Tools GmbH, Besigheim (renamed from Cooper Tools GmbH in 2010)
• UK
  • Cooper Tools Ltd., Sedling Road, Wear, Washington, Tyne & Wear NE38 9BZ
• USA
  • CooperTools, The Cooper Group, Apex, NC 27502
• USA, Puerto Rico
  • Weller Mfg. Co., Inc., Bayamón, PR (not to be confused with the company in Chicago)
• Japan
  • Production plant