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2. L. S. Starrett Company - Wikipedia

   en.wikipedia.org/wiki/L._S._Starrett_Company

   The Starrett corporation has continuously expanded through its history through the patenting of products and takeovers of other manufacturers. In 1878 Laroy S. Starrett invented and patented the first combination square, [4] and in 1880 he founded the L.S. Starrett Company in Athol, Massachusetts, in order to produce it and other precision ...

3. Indicator (distance amplifying instrument) - Wikipedia

   en.wikipedia.org/wiki/Indicator_(distance...

   Dial indicators typically measure ranges from 0.25 mm to 300 mm (0.015in to 12.0in), with graduations of 0.001 mm to 0.01 mm or 0.00005in to 0.001in (imperial/customary). Various names are used for indicators of different types and purposes, including dial gauge , clock , probe indicator , pointer , test indicator , dial test indicator , drop ...

4. Panel call indicator - Wikipedia

   en.wikipedia.org/wiki/Panel_call_indicator

   Panel Call Indicator, or PCI, is a form of signalling used between two telephone offices.It was also originally called Relay Call Indicator (RCI). Originally designed along with the panel type telephone office, PCI was intended to allow subscribers in fully automated exchanges to dial numbers in manual offices the same way they dialed numbers in their own exchange.

5. Total indicator reading - Wikipedia

   en.wikipedia.org/wiki/Total_indicator_reading

   The indicator traditionally would be a dial indicator; today dial-type and digital indicators coexist. The earliest expansion of "TIR" was total indicated run-out and concerned cylindrical or tapered (conical) parts, where " run-out " (noun) refers to any imperfection of form that causes a rotating part such as a shaft to "run out" (verb), that ...

6. Dial (measurement) - Wikipedia

   en.wikipedia.org/wiki/Dial_(measurement)

   A dial is generally a flat surface, circular or rectangular, with numbers or similar markings on it, used for displaying the setting or output of a timepiece, radio, clock, watch, or measuring instrument. [1] Many scientific and industrial instruments use dials with pointers to indicate physical properties.

7. Candlestick telephone - Wikipedia

   en.wikipedia.org/wiki/Candlestick_telephone

   Most recognizable, candlesticks featured a base with a vertical cylindrical neck extending upright for up to 10 inches (25 cm) in length. At the top of the stand was mounted a carbon microphone ( transmitter ) to speak into, and a switch hook extending sideways upon which an earpiece ( receiver ) was hung.