United States Electrical Manufacturing Co., a maker of electric motors and grinders, was established in 1908. In 1935 the name changed to U. S. Electrical Motors, Inc. In 1962 they became the "U.S. Electrical Motors Division of Emerson Electric Co.".

We have seen some grinders from this firm labeled, simply, as "U. S. Motors". They also used a decal that said "U.S. Motors / Asbestos Protected". They used the trade marks "AutoStart" on various grinder/polishers and motors, and "Uniclosed" on some totally enclosed motors.

Information Sources

• A restored example can be seen in an owwm.org discussion.
• From the 1921-01-01 issue of Electrical World:

  Pacific Coast Motor Pioneers Reorganized

  The U. S. Electrical Manufacturing Company of Los Angeles has recently reorganized through the affiliation of the interests of H. G. Steele, formerly vice-president of the Pittsburgh Transformer Company, and C. E. Johnston of Los Angeles, Cal., vice-president of the U. S. Electrical Manufacturing Company. Mr. Steele, who is now the president of the U. S. Electrical Manufacturing Company, resigned from the Pittsburgh Transformer Company in the summer of 1919.

  The U. S. Electrical Manufacturing Company, which is the pioneer manufacturer of electrical motors in the West, has been in existence for twelve years and now does a business of more than $2,000,000 annually. It is understood that plans for enlarging the business and the building of an additional factory are being made.

• The 1921-05-21 issue of Electrical World had the following biography.

  H. G. Steele, formerly vice-president and manager of the Pittsburgh Transformer Company, is now the president and treasurer of the U. S. Electrical Manufacturing Company of Los Angeles. Mr. Steele was born in Harrisonburg, Va., in 1881, and attended the public schools in Pittsburgh, Pa. Immediately after graduation from school he became associated with the Pittsburgh Transformer Company at the time of its formation in 1899. Beginning with a capital of $10,000 and a total volume of business of $20,000, that company expanded so greatly in twenty years that least year its business totaled more than $2,000,000. Mr. Steele then sold his interests and became associated with C. E. Johnson of the U. S. Electrical Manufacturing Company of Los Angeles, the latter company being reorganized and Mr. Steele become its president and treasurer. This reorganization has been effected with a view toward greatly increased activity. During the war Mr. Steele served as chairman of the transformer committee of the War Industries Board.

• The 1921-06-18 issue of Electrical World had the following biography.

  Carl E. Johnson, who was made vice-president and secretary of the U. S. Electrical Manufacturing Company of Los Angeles at the time of its recent reorganization, has been in the electrical manufacturing business almost all of his life. Upon graduation from public school he entered the employ of a small manufacturing company which produced direct-current generators. This was in the days when metal brushes were used on direct-current machinery. Later he was employed by the Western Electric Company and the Cutler-Hammer Manufacturing Company in various capacities. Mr. Johnson was born in Chicago, but early removed to San Francisco and entered the employ of the Union Iron Works in the winding department, where he remained two years. In 1906 he organized the Dynamo Electric Company of Los Angeles and engaged in the manufacture of electric motors. In 1908 the U. S. Electrical Manufacturing Company was organized and took over the Dynamo Electric Machine Company. Mr. Johnson served in the capacity of general manager of the former company until the later part of 1920, when H. G. Steele, formerly of the Pittsburgh Transformer Company, became associated with the U. S. Electrical Manufacturing Company, Mr. Johnson then becoming vice-president and secretary. He has taken a leading part in the affairs of the local technical societies, where he counsel has always proved of great usefulness.

• Advertisements in various 1921 issues of Western Machinery World.
• A 1935 issue of Electrical Manufacturing had the following snippet.

  U. S. Electrical Mfg. Co., 200 E. Slauson Ave., Los Angeles, Calif., has changed its name to U. S. Electrical Motors, Inc. There has been no change in ownership or management.