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- Servant Call System from the Charles F. Brush Residence, Cleveland, Ohio, circa 1885 - Annunciators were call systems that alerted servants to the needs of the household in which they worked. Each room contained a button to trigger the annunciator housed in servant's quarters. Primitive 18th-century bell systems evolved with the rise of battery power, telegraphy, and home electrification. This device was from the Charles F. Brush mansion, inventor of the arc lamp.

- circa 1885
- Collections - Artifact
Servant Call System from the Charles F. Brush Residence, Cleveland, Ohio, circa 1885
Annunciators were call systems that alerted servants to the needs of the household in which they worked. Each room contained a button to trigger the annunciator housed in servant's quarters. Primitive 18th-century bell systems evolved with the rise of battery power, telegraphy, and home electrification. This device was from the Charles F. Brush mansion, inventor of the arc lamp.
- Servant Call System from the Walker Residence, Detroit, Michigan, circa 1896 - Annunciators were call systems that alerted servants to the needs of a household. Each room contained a button to trigger the annunciator housed in servant's quarters. Primitive 18th-century bell systems evolved with the rise of battery power, telegraphy, and home electrification. This device was installed in Franklin Walker's Residence, son of Hiram Walker and president of the distillery.

- circa 1896
- Collections - Artifact
Servant Call System from the Walker Residence, Detroit, Michigan, circa 1896
Annunciators were call systems that alerted servants to the needs of a household. Each room contained a button to trigger the annunciator housed in servant's quarters. Primitive 18th-century bell systems evolved with the rise of battery power, telegraphy, and home electrification. This device was installed in Franklin Walker's Residence, son of Hiram Walker and president of the distillery.