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Knight's Mechanical Encyclopedia (ed. Knight) 3 3 Browse Search
John Bell Hood., Advance and Retreat: Personal Experiences in the United States and Confederate Armies 1 1 Browse Search
Col. O. M. Roberts, Confederate Military History, a library of Confederate States Military History: Volume 12.1, Alabama (ed. Clement Anselm Evans) 1 1 Browse Search
Southern Historical Society Papers, Volume 30. (ed. Reverend J. William Jones) 1 1 Browse Search
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Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for 1288 AD or search for 1288 AD in all documents.

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Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
eight-driven clocks commenced, cannot now be determined, but it is certain that the clocks of the Spanish Saracens were driven by weights. The renowned Gerbert studied philosophy and common-sense at the Saracenic University of Cordova, became successively a schoolmaster at Rheims (where he had a clock), Archbishop of Ravenna, and Pope Sylvester II., to which latter dignity he was advanced by the Emperor Otho III.; and they died by poison, both of them. To follow up the recital: — A. D. 1288, a clock was placed in the old palace yard, London, and remained till the reign of Queen Elizabeth. A. D. 1292, a clock was placed in Canterbury Cathedral. A. D. 1300, Dante refers to a clock which struck the hours. Chaucer refers to the horologe. No certain mention is made, up to this time, of the means of regulating the speed of the machine, and that the pendulum had not been adopted to any extent, is certain. It may be presumed that the device used was a fly (see fly); a wheel
Knight's Mechanical Encyclopedia (ed. Knight), F. (search)
of impact upon the air, thus increasing or diminishing the resistance of a given surface of wing and modifying the speed. This regulator was probably the first device attached to the going works of a clock, many centuries before the oscillating arm or the pendulum were adapted to the purpose. See pendulum. Among the clocks thus regulated may be cited that of Richard of Wallingford, abbot of St. Albans, A. D. 1380. It is likely that the clock erected in the Old Palace-Yard, London, in 1288, and that of Canterbury Cathedral, A. D. 1292, were similarly constructed. To go a step farther back, we may suppose that the clocks presented by Pope Paul 1. to Pepin of France, A. D. 760, and to Charlemagne by the Caliph Haroun Al Raschid, A. D. 810, were of similar construction; or perhaps were clepsydras. 2. (Printing.) A vibrating frame b with fingers, taking a printed sheet from the tapes and delivering it on to the heap. 3. (Knitting-machine.) Another name for the latch (wh
Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
ic, as the hygrometric pendulum, ballistic pendulum, etc. Previous to the application of the pendulum, a fly-wheel was used, the vanes meeting the resistance of the air, forming a limit to the speed, as in the musical boxes of the present day. Such was probably the regulator in the clocks of the Saracens, which were moved by weights as early as the eleventh century; the clock which struck the hours, referred to by Dante (1265-1321); the clock in the old Palace Yard, London, put up about 1288 and remaining till the time of Elizabeth; the clock made by William of Wallingford in the reign of Richard II. （1377-85). Ebn Junis, of the University of Cordova, invented the timemeasuring pendulum, and his friend and fellow-philosopher, Gerbert, invented the escapement, as it is believed. Gerbert became, successively, schoolmaster at Rheims (where he had a clock), Archbishop of Ravenna, and Pope Sylvester II. He died by poison in 1002. So did his patron, Otho III., about the same tim