69:, an Indianapolis architect, the two men developed and were awarded a series of nine patents relating to new and improved exit door hardware. All of the patent designs focused on a single lever bar (and related hardware) that would cause a locked door to pop open when simple interior pressure was exerted upon it. The bar would be mounted waist high from the ground.
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distributed by the
Vonnegut Hardware Company. Manufacturing took place in Indianapolis (also in Chicago and Canada in later years). In 1908, Prinzler was named manager over the manufacturing process. He was elected to the Board of Directors of Vonnegut in 1910. Dupont would continue his career as an architect and would leave an impressive legacy.
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to German immigrants. In 1886, Prinzler, then 16 years of age, found employment as a sales clerk at the Lilly and
Stalnaker Hardware Company in downtown Indianapolis. Prinzler would later recall that, as a naive young man with no real hardware experience, he once mistakenly sold a wash machine to a
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Through an extensive, national network of independent sales representatives, the Von Duprin Safe Exit
Devices were widely sold and installed in schools, hospitals, theaters, public assembly buildings, and other public and private buildings throughout the United States and in some foreign countries.
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entered into an arrangement providing for the manufacture, marketing and distribution of the patent protected hardware. Under the trade name Von Duprin (a blend of the three principals names, VONnegut, DUpont, PRINzler) the Von Duprin Safe Exit Device, as it was called, was manufactured and
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Prinzler resided at 3535 N. Central Avenue, Indianapolis. He was a member of the
Indianapolis Athenaeum, the Hardware Age Club, the Shriners, the Scottish Rite and the Peniaipha Masonic Lodge. Prinzler died in Indianapolis on May 30, 1949 (aged 78) and was interred in Crown Hill Cemetery,
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which claimed 600 lives. Prinzler, personally moved by the experience and loss of life, committed his thinking to developing door hardware that could remain locked from the outside while allowing safe and reliable emergency exit to people on the inside. Working with his neighbor,
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female customer in search of a butter churn. The following year, 1887, Prinzler would change employment to the
Vonnegut Hardware Company which was located nearby at 342 E. Washington Street.
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In 1898, Vonnegut would move its retail store into a building located at 120-124 W. Washington Street. Prinzler maintained an office in this building over most of his
Vonnegut career.
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and the
Vonnegut family. His employment there spanned over 50 years. He continued to manage the manufacturing process and serve as a director of the company until his retirement.
179:"Eighth Annual Business Education Day - Teachers Visit Vonnegut's" The Try Square - December 1956, published by and for The Employees of The Vonnegut Hardware Company
30:" device for doors that allowed them to be opened from the inside despite being locked on the outside. He was manager of the Builders Hardware Department at the
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142:"Mr Homer Eichacker's Retirement Party", The Try Square - October 1961, published by and for The Employees of The Vonnegut Hardware Company
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Prinzler had been in
Chicago on December 30, 1903, and, by some fortunate twist of fate, escaped becoming a victim of the tragic
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133:"Friends surprise Vonnegut Officer as he enters 51st Year with Firm", The Indianapolis Star, November 2, 1937
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In 1895, Prinzler was promoted to manager of the firm's art hardware and building materials department.
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188:"Carl Prinzler, Designer, Vonnegut Director, Dies", The Indianapolis Star, June 1, 1949
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26:(June 6, 1870 – May 30, 1949) was an American engineer who invented the "
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in 1903, when, along with his architect and engineer neighbor
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109:"Carl J. Prinzler, Fire Device Inventor, Dies"
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72:Circa 1908, Prinzler, Dupont and the
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229:American people of German descent
219:People in building engineering
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86:Vonnegut Hardware Company
74:Vonnegut Hardware Company
32:Vonnegut Hardware Company
234:People from Indianapolis
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113:The Indianapolis News
62:Iroquois Theatre Fire
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156:"Panic Bar"
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166:2024-01-23
96:References
42:Biography
28:panic bar
119:14 April
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