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US Patent: 1,312,610
Variably pitched and actuated bell
Patentees: Roland Harry Robinson (exact or similar names) - St. Louis, MO Penrose E. Chapman (exact or similar names) - St. Louis, MO USPTO Classifications: 116/149, 340/392.1 Tool Categories: specialty tools : firefighting tools : fire alarms Assignees: Penrose E. Chapman - St. Louis, MO Manufacturer: P. E. Chapman Electrical Works, Inc. - St. Louis, MO Witnesses: E. F. Seidler Justine E. Kossman	Patent Dates: Applied: Jul. 29, 1915 Granted: Aug. 12, 1919 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for P. E. Chapman Electrical Works, Inc.

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