A Grinnell – undated quartzoid sprinkler advertising paperweight. Marked Grinnell and Patented on on side; Grinnell and Quartzoid on the other. Also C37 on one side and 135 – or 185 – on the other. While threaded, the sprinkler does not detached from the base. History, per online resources: In 1851, Frank Grinnell established the first company to develop and manufacture fire sprinklers. In 1872, Philip W. Pratt invented and patented the first automatic sprinkler, with plugs that melted to release water. In 1874, Henry S. Parmelee patented the Parmelee Sprinkler with soldered holes that melted when heated releasing water. In 1878, Grinnell patented a sprinkler tube, Parmelee received patents for improvements, and Grinnell agreed to manufacture the Parmelee Sprinkler. The breakthrough occurred in 1871 when Grinnell patented the first sensitive automatic sprinkler, using a heat-activated fusible link – a water filled glass bulb – for responsive water release. Grinnell introduced the faster acting quartzoid glass bulb sprinkler in the early 1920s. About 3 3/8 x 1 3/4 x 1 3/4 inches
Weight: 0.435 LB
Measurement: 3.375 x 1.75 IN
Depth: 1.75
Condition report:
Gold finish shows some - nominal - wear on base. The glass holds orange - red liquid and, when tipped, an air bubble moves.
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