Treatise on Clock and Watch Making: Theoretical and Practical |
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Common terms and phrases
arbor astronomical clock axis balance spring balance wheel barrel bell Berthoud brass carries centre chronometer circle circumference cock compensation contrate wheel contrived cylinder degree detent dial distance ditto divided divisors dulum edge endless screw equal equation Fahrenheit Ferdinand Berthoud fixed force fourth wheel fraction frame fusee give given gridiron pendulum half hammer hole isochronism lever locking lower end means minute wheel month wheel motion multiplied nearly notch number of teeth number of turns number of vibrations pallet pendulum ball pendulum rod pendulum spring piece of brass pitching pivots plate pulley pyrometer quarter quotient rack ratchet ratio regulating remontoir Required the numbers revolution roller round scapement sector side socket space square steel rods striking stud supposed swing wheel thick third wheel time-keeper tion tooth tube turret clocks verge watch weight wheel teeth wheels and pinions zinc
Popular passages
Page 471 - Eclaircissements sur l'invention, la théorie, la construction et les épreuves des nouvelles machines proposées en France, pour la détermination des longitudes en mer par la mesure du temps...
Page 471 - Traité des horloges marines ; contenant la théorie, la construction, la main-d'œuvre de ces machines, et la manière de les éprouver, pour parvenir, par leur moyen, à la rectification des cartes marines, et à la détermination des longitudes en mer.
Page 316 - Before the introduction of railways, people used to set their clocks by the sun. But owing to the obliquity of the ecliptic and the eccentricity of the earth's orbit around the sun, the intervals between successive passages of the sun are not exactly equal. The consequence is that, if a clock keeps exact time, the sun will sometimes pass the meridian before and sometimes after twelve by the clock. When this was understood, a distinction was made between apparent...
Page 470 - Traite' d'Horlogerie, contenant tout ce qui est nécessaire pour bien connaître et pour régler les pendules et les montres, la description des Pièces d'Horlogerie les plus utiles.
Page 470 - Règle artificielle du Temps ; Traité de la Division naturelle et artificielle du Temps ; des Horloges et des Montres de différentes constructions ; de la manière de les connaître, et de les régler avec justesse.
Page 271 - Put a quantity of the best olive oil into a phial with two or three times as much water, so that the phial may be about half full. Shake the phial briskly for a little time, turn the cork downwards, and let most part of the water flow out between the side of the cork and the neck of the phial.
Page 164 - To three times the square of the radius of its base add the square of its height; multiply this sum by the height and the product by 0.5236.
Page 178 - Of late, another candidate for the application of the pendulum to a clock has been brought forward by such respectable authority, that leaves little or no room to doubt of its authenticity. Mr. Grignion informs us, " that a clock was made in 1642, by Richard Harris of London, for the church of St. Paul's, Covent Garden, and that this clock had a pendulum to it.
Page 471 - Les Longitudes par la Mesure du Temps, ou Méthode pour déterminer les Longitudes en Mer, avec le secours des Horloges marines...
Page 231 - There is only one way to do this, and that is by transferring all state power to the Soviets of Workers', Soldiers' and Peasants' Deputies both in Russia and in other countries.