In the 20th century this firm made grinding machines.
Information Sources
- History of Bridgeport and Vicinity, by George Curtis Waldo, Jr., 1917, has a biography of Elwyn R. Hyde, which contains the following snippet.
...at which time the name was changed to the Springfield Emery Wheel Manufacturing Company. They erected a factory building on Howard avenue. Mr. Hyde left that company about 1892 and for a decade conducted a private business in the same line, establishing a factory in that line at 82 Knowlton street, where the plant has ever since been located. In 1903, however, he organized the business as the Bridgeport Safety Emery Wheel Company, Incorporated, of which he became the treasurer and manager, with D. T. Homan as president and M. P. Hyde as secretary...
- Directory of Metalworking Machinery, 1951, pg. 7