Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for 1630 AD or search for 1630 AD in all documents.

Your search returned 7 results in 5 document sections:

Knight's Mechanical Encyclopedia (ed. Knight), B. (search)
s. The workman seats himself on the ground, and, placing the machine between his legs, grasps the ends of the bags, and by alternately raising each with the mouth open and pushing it into the calabash when closed, the contained air is forced into the tubes and a continuous blast maintained. Wooden bellows were known in Germany in the middle of the sixteenth century, but it is not certain by whom they were invented. Lobsinger of Nuremberg (1550), and Schelhorn of Schmalebuche, in Coburg (1630), are cited as having introduced them. They are described in a work by Reyner, professor at Kiel, 1669, as being pneumatic chests, and as consisting essentially of a lid moving in a closely fitting box. In another form we find that two boxes were used, one fitting closely within the other, and the two, being perhaps quadrantal segments of cylinders, were hinged together so that the movable one vibrated on the common axis. Forge-bellows. Old Roman lump. The ordinary bellows in its
Knight's Mechanical Encyclopedia (ed. Knight), D. (search)
y of the lapidary being to cut it so as to sacrifice as little as possible of the stone and obtain the greatest surface, refraction, and general beauty. Having decided upon the form, a model is made in lead and kept before the workman as a copy. The rough diamond is cemented to a handle called a dop (a, Fig. 1630), leaving the part exposed which is to be removed to form one facet. The projecting portion is then removed by attrition against another diamond similarly set in a handle (B, Fig. 1630), or by means of diamond-dust and oil upon a disk, wheel, or wire, according to circumstances. When a facet is finished, the stone is reset in the handle and the process repeated. Several months are expended in cutting large stones, as the work proceeds very slowly. Diamond-cutting. The polishing is performed upon a rapidly revolving iron wheel d, driven by a band g, and fed by hand with diamond-dust and oil (C, Fig. 1630). The diamond is set in a dop as before, on the end of a weigh
Knight's Mechanical Encyclopedia (ed. Knight), L. (search)
have hastened his death, which happened in 1615, by the fatigue and anxiety incurred in supporting his claims. Galileo had a hint of the invention, studied it out, and made a telescope which he soon put to use. See telescope. Kepler (1571 – 1630) was, perhaps, the first to state with precision the effects of lenses in making the pencils of light converge or diverge. He showed that a plano-convex lens makes rays that were parallel to its axis to meet at the distance of the diameter of the glasses is applicable to concave, with the difference that the focus is on the contrary side of the glass. Kepler, in his Catoptrics, explains the rationale of the system of lenses in a telescope. Scheiner constructed one on this principle in 1630. His description is as follows: If you insert two similar lenses (that is, both convex) in a tube, and place your eye at a convenient distance, you will see all terrestrial objects, inverted indeed, but magnified and very distinct, with a conside
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
father of the Marquis, the author of The century of inventions, and the person who was doing the mad-house. A French historian farther cites that Solomon De Caus could hardly have been seen at Bicetre in 1641 in a raving condition, as he died in 1630; and farther, that Bicetre was not a hospital in 1630 or 1641. At all events, the device of De Caus' fountain is inferior to that of Porta, as the boiler and water-chamber are not distinct in the former. Next in the line we behold the Marqui1630 or 1641. At all events, the device of De Caus' fountain is inferior to that of Porta, as the boiler and water-chamber are not distinct in the former. Next in the line we behold the Marquis of Worcester, who so faithfully adhered to the faithless Charles I and his fortunes, losing his own. Following the style of his day, he wrote in a mysterious manner, veiling his devices in superlatives, and leaving his Century of inventions as a hundred nuts to crack for future generations. Many teeth have been ruined on them, and it is shrewdly suspected that some of them are all shell, — a stony endocarp without a kernel. Powerful jaws are still at them. Marquis of Worcester's water-ele
Knight's Mechanical Encyclopedia (ed. Knight), T. (search)
n erect image of the object m n. Terrestrial telescope. This image p is seen by the eye at s through the lens b, as the rays diverging from p in the focus of b enter the eye in parallel pencils. When the first three lenses are equal, the magnifying-power is the same as that of the astronomical telescope, whose object and eye glasses are the same as a e. See telescope. Rheita was the first to employ the combination of three lenses, known as the terrestrial telescope. Scheiner, in 1630, had used a combination of two convex lenses, the image being inverted; to this he afterward added two other glasses which again reversed the images, making them appear in their natural position. Gig-saddle, with terrets. Ter′ret. （Saddlery.) A ring attached to the pad or saddle and hames of harness, through which the drivingreins pass. Ter′ri-er. An auger. A wimble. Ter′ro-met′al. A composition of several clays, possessing, when baked, peculiar hardness, introduced