A Manual of Carpentry and Joinery

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Macmillan and Company, limited, 1905 - 500 páginas
 

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Página 309 - If three forces acting at a point are in equilibrium, they can be represented in magnitude and direction by the three sides of a triangle taken in order.
Página 306 - ... forces will be represented in magnitude and direction by that diagonal of the parallelogram which passes through this point.
Página 483 - INSTRUCTIONS. The candidate must confine himself to one grade only, the Ordinary or Honours, and must state at the top of his paper of answers which grade he has selected. He must not answer questions in more than one grade. If he has already passed in this subject in the first class of the Ordinary Grade, he must select his questions from those of the Honours Grade. The number of the question must be placed before the answer in the worked paper.
Página 156 - ... 2. To place each abutting surface in a joint as nearly as possible perpendicular to the pressure which it has to transmit. 3. To proportion the area of each surface to the pressure which it has to bear, so that the timber may be safe against injury under the heaviest load which occurs in practice, and to form and fit every pair of such surfaces accurately, in order to distribute the stress uniformly.
Página 89 - Prove that parallelograms on the same base and between the same parallels are equal in area.
Página 22 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Página 22 - A circle is a plane figure bounded by a line, every point of which is equally distant from a point within, called the center.
Página 343 - A man sitting upon a board suspended from a single moveable pulley pulls downwards at one end of a rope which passes under the moveable pulley and over a pulley fixed to a beam overhead, the other end of the rope being fixed to the same beam. What is the smallest proportion of his whole weight with which the man must pull in order to raise himself?
Página 334 - Each beam therefore has what is called a natural constant, which must be considered in the calculation of its carrying capacity. To obtain this constant, it is usual to take a bar of similar wood, 1 inch square in section, and long enough to allow of its being placed on supports 1 foot apart. The constant is the weight of the central load, which is just sufficient to break the bar. The constant may be expressed in Ibs., cwts.,. tons, etc., and the carrying capacity will always be in the same terms....
Página 24 - To describe a circle which shall pass through three • given points not in the same straight line.

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