Original 1921 electrical trade vintage magazine ad for GEORGE ALLEN & SON, INC. Main office and plants were located in New York, NY, Cleveland, OH and Philadelphia, PA.

Manufacturers of Boiler Settings.  'The blocks which are made to fit'.

Allen Header Blocks are made to conform to the outline of Boiler Headers. They dispense with expensive and unsatisfactory methods of cutting and fitting each individual brick into its place. The perfect fit of Allen Blocks makes loosening and displacement due to boiler vibrations practically impossible.

Allen Blocks allow maximum expansion, prevent air leaks and protect header from hot gases. By eliminating faulty workmanship, they eliminate a cause for serious trouble and for time consuming shutdowns.

The Allen Dusting Door Blocks are an improved brick, completely insulating boiler dusting doors, within the duster openings are provided and integral blocks. These, like the Allen Header Blocks, cut down repairs and increase the efficiency of the boiler.

Both types of Allen Blocks are guaranteed to last the life of the boiler. Over 30 years experience as Boiler Setters is at your service.

Has product images, description and applications to provide product details.

Unbound from a rare 1921 Electrical World magazine, this unique old one-page technical magazine advertisement would display beautifully matted and framed. Nice graphics. A fabulous addition to your retro electrical industry library.