The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . age, a clock of beautiful construction which is now in Windsor is a clock at Hampton Court Palace bearing the date 1540, and theinitials N. O. There is a clock at Berne, Switzerland, constructed by Gaspard Brun-ner, a locksmith, but improved and repaired by Angely, a French clock-maker, in 1686. In 1758 James Ferguson invented what was known as the SimpleClock. Fig. 94 illustrates the dial and wheel work of this clock. Itshowed the hours, minutes and seconds, by means of onl
The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . age, a clock of beautiful construction which is now in Windsor is a clock at Hampton Court Palace bearing the date 1540, and theinitials N. O. There is a clock at Berne, Switzerland, constructed by Gaspard Brun-ner, a locksmith, but improved and repaired by Angely, a French clock-maker, in 1686. In 1758 James Ferguson invented what was known as the SimpleClock. Fig. 94 illustrates the dial and wheel work of this clock. Itshowed the hours, minutes and seconds, by means of only three wheelsand two pinions. The great wheel contained 120 teeth and turnedaround in twelve hours, and on its axis was the plate on which the 99 Clocks. twelve hours were engraved. This wheel turned a pinion of ten leavesand the minute hand was on the axis of this pinion. On this axis wasalso a wheel of 120 teeth which geared into a pinion of six leaves, and onthe axis of this pinion was a wheel of 90 teeth, going around in threeminutes and keeping a pendulum m motion that vibrated seconds, by DML-PUTC. ar wuHUtftNC Fig. 94. pallets, as in a common clock, where the scape wheel has thirty teethand revolves in a minute. As this wheel only revolved in three minutesit was necessary, in order to show the seconds, that a thin plate be fastenedto the axis and divided into 180 equal parts, and divided as shown in theillustration, 10, 20, 30, 40, 50, 60; 10, 20, 30, etc. Annual and 400 Day Clocks. These clocks are made to run muchlonger than usual with one winding, by simply interposing a number ofgears and pinions between the barrel and the usual train, and using alonger and stronger spring to overcome the increased friction in thetrain. These clocks are usually provided with torsion pendulums. Theyare made chieflly as curiosities. Astronomical Clock. A clock having twenty-four hours shown onthe dial and a pendulum of such length as to show stellar time, which isthree minutes
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Keywords: ., bookcentury1800, bookdecade1890, bookidamericanwatc, bookyear1892
