The coils of the electromagnets are differentially wound with silk-covered wire, 4 mils (= 004 inch) in diameter, to a total resistance of 400 ohms. This differential winding enables the instrument to be used for " duplex " working, but the connexions of the wires to the terminal screws are such that the relay can be used for ordinary single working. [Please select]
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(_b_) Intermediate rolls, grooved in varying designs and geared differentially. [Please select]
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The method eventually adopted consisted in "breaking down," "milling," or "masticating" the rubber by passing it continuously between differentially geared steam-heated rollers. [Please select]
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