"When bodies of equal weight are supported by the arms of a lever, they will balance each other when…
A bridge which may be drawn up or let down to admit or hinder communication, or to leave a transverse…
"... shows one of the commonest (sic) forms in which this kind of lever appears,-the crowbar. The power…
Pliers are a hand tool used to hold objects firmly, or for cutting and bending tough materials such…
"A lever is an inflexible bar freely movable about a fixed axis called the fulcrum. If the fulcrum is…
"A Lever of the First Kind is one in which the fulcrum is between the power and the weight... where…
In the first order of levers, the fulcrum is between the power and the weight.
"In mechanics, the point of rest about which a lever turns in lifting a body; also, a prop or support…
"E represents the scape-wheel turning in a minute, and e its pinion, which is driven by the wheel D…
"The object W to be lifted is called the weight; the force is represented by P; the point, or pivot,…
"The object W to be lifted is called the weight; the force is represented by P; the point, or pivot,…
"The object W to be lifted is called the weight; the force is represented by P; the point, or pivot,…
Illustration of a lever with fulcrum F. W represents the weight lifted, P is the force that does the…
An illustration of a lever with weights m and n with distances a and b from fulcrum. Illustration could…
"The lever of the first class has the fulcrum between the power and the weight." Examples: a common…
This illustration shows the first class of lever. This class employs a fulcrum between the power and…
"In straight levers of the first kind, the fulcrum is between the power and the resistance, as in fig…
"The lever of the second class has the weight between the power and the fulcrum." Examples: a nutcracker,…
"In the second order of levers, the resistance is between the fulcrum and the power; and, as before,…
Illustration of an ordinary steel-yard being used as a lever. F represents the fulcrum. Weight P is…
"The lever of the third class has the power between the weight and the fulcrum." Examples: sewing machine…
"In the third order of lever the power acts between the prop and the resistance, where also P : W ::…
Images of different points about a fulcrum F. P is the power exerted on the object, W is the weight.
This is a corkscrew type bottle opener, or a device that enables the removal of metal bottle caps from…
Illustration of a hydraulic machine. "A principle known as Pascal's Law states that pressure exerted…
"In the single fixed pulley (fig. 1) there is no mechanical advantage, the power and weight being equal.…
"In a system of pulleys (figs. 3,4) in which the same string passes round any number of pulleys, and…
"In a system in which each pulley hangs by a separate cord and the strings are parallel (fig. 5), there…
"A common scale-beam, used for weighing, is a lever, suspended at the centre of gravity, so that the…
"Many instruments in common use are on the principle of this kind of lever. Scissors, consists of two…
"A lever is an inflexible bar freely movable about a fixed axis called the fulcrum. If the weight is…
"Two men carrying a load between them on a pole is also and example of this [second class] kind of lever.…
"A Lever of the Second Kind is one in which the weight is between the power and the fulcrum." —Quackenbos…
In the second order of levers, the weight is between the power and the fulcrum.
"Any rod, or bar, which is used in raising a weight, or surmounting a resistance, by being placed on…
"Suppose that A is the lever, B the fulcrum, D the weight to be raised, and C the power. Let D by considered…
"Suppose the weight, B to be sixteen pounds and suppose the fulrum to be placed so near it, as to be…
"But let the fulcrum be moved along to the middle of the lever, with the weight of sixteen pounds still…
"An apparatus for extracting spikes, as from a rail. a, rail; b, spike to be extracted; c, fulcrum-piece…
The steelyard is an instrument for weighing bodies by means of a single weight which can be hung at…
"Heterocercal Caudal Fin of a Sturgeon (Acipenser brevirostris), showing the series of fulcrums, Fl,…
"A lever is an inflexible bar freely movable about a fixed axis called the fulcrum. If the power is…
"In the third and last kind of lever, the weight is placed at one end, the fulcrum at the other end…
"A Lever of the Third Kind is one in which the power is between the weight and the fulcrum." —Quackenbos…
"Considered as a lever, the fulcrum is at the common axis, while the arms of the lever are the radii…