Browse Items (114 total)

The Duane D. Pearsall manuscript collection MS055 at WPI, includes business and personal records of Duane Pearsall, developer of the battery-powered home smoke detector. Records of Statitrol, the smoke detector company Mr. Pearsall founded, plus…

Duane describes his experience of enlisting in the Navy.

A scrapbook Pearsall compiled from his years at Statitrol.

Statitrol Commercial Smoke Detector #14 Experimental model; Silver in color with round metal housing.

Back of the Statitrol Commercial Smoke Detector #14 Experimental model; view of direct wire AC line (cut).

Model 700A is UL Listed as a single station fire alarm device; use (3) 4.5V Alkaline batteries mallory PX-21. Install per owner's manual and NFPA Standard 74.

Model 700A battery compartment on top; UL Listed single station fire alarm device; use (3) 4.5V Alkaline batteries mallory PX-21. Install per owner's manual and NFPA Standard 74.

Model 710 is a Factory Mutual Approved model made by Statitrol for Sears prior to UL approval.

Model 710 battery compartment on top; uses (3) 4.5V Alkaline batteries, mallory PX-21. Made by Statitrol for Sears prior to UL approval.

Smokegard model 720 is ICBO listed product-see report No. 2892 BOCA 74-26; U.S. Patent 3778800, Pat.Pending Worldwide. Factory Mutual approved, no UL listing; uses(3) 4.5V Batteries, mallory PX-21.

Smokegard Model 720 battery compartment in back. Install per owner's manual 0173-2 and NFPA STD 74 Manufactured by Statitrol Corporation, 140 S Union Blvd, Lakewood Colorado 80228. Contains radioactive material of 1 microcurie Americium 241.

SmokShield Home Smoke Detector Model 801A8101-1, patent pending, was UL Listed as a single station fire alarm device; Manufactured by Statitrol Corporation, 140 S Union Blvd, Lakewood Colorado 80228. Contains radioactive material of 1 microcurie…

SmokShield Home Smoke Detector battery compartment on back of unit. Install per owner's manual LC5106 and NFPA STD 74 Manufactured by Statitrol Corporation, 140 S Union Blvd, Lakewood Colorado 80228. Contains radioactive material of 1 microcurie…

Model 730 patent pending; Note inside says, special plug to inter-connect more than one unit. Design was too expensive.

Model 730 did not use batteries; Note inside says special plug to inter-connect more than one unit. Design was too expensive. patent pending.

The package for the Smokegard Duo Centric Chamber Model 800A8 is a battery powered home smoke detector manufactured by Statitrol after the company became a division of Emerson Electric; UL listed as a single station fire alarm device.

Smokegard Duo Centric Chamber Model 800A8; US Patent 3,899,732, other patents pending; Install per owner's manual LC5184 and NPFA 74; BOCA 75-35.

Smokegard Duo Centric Chamber Model 800A8 battery compartment on the back of unit. Manufactured by Statitrol Div., Emerson Electric Co., 140 S Union Blvd, Lakewood Colorado 80228. Contains radioactive material of 1 microcurie Americium 241. Uses (6)…

Direct wire AC line powered home smoke detector; Patent Pending; UL Listed as a single station fire alarm device

Smokegard Early Warning Smoke Detector Model 900A2101 wiring in back of unit. Install per owner's manual LC5117 and NFPA STD 74. Manufactured by Statitrol Corporation, 140 S Union Blvd, Lakewood Colorado 80228. Contains radioactive material of 1…

Smokegard Dual Chamber Model 907B2 is a direct wire AC line powered home smoke detector. UL listed as a sinlge or multiple station smoke detector. U.S.Patent No 4,335,378, Other patents pending.

Smokegard Dual Chamber Modle 907B2 wiring found on back of unit. Install per owner's manual 0907-0033 and NFPA STD. 74. Reference Owner's Instruction Notice 0108-0523 for vital information in unit operation. NRB-158 seal; Council of American Building…

Letter of congratulations from President Gerald Ford. Gold plated letter mounted on wood from President Ford to Duane Pearsall. Measures 11x15 inches

SBA award Plaque. U.S. Small Business Administration presents the National Small Business Person of the Year award 1976 to Duane Pearsall, May 13, 1976.Mounted gold plated award to Duane Pearsall. Measures 11x15 inches.

Certificate from the State of Colorado Small Business Association. The United States of America Small Business Administration presents the 1976 Small Business Person of the Year Award to Duane D Pearsall for exemplifying the imagination, initiative,…