Simple Machines, Levers

Simple Machines, Levers

Record 1 to 25 of 42

Clipart illustrations of a simple machine, levers. Levers use a rigid object with a fulcrum or pivot point, and by doing so multiply the mechanical force applied to another object.

Chipping knife
"The common chipping-knife, used by apothecaries, and represented [here], is a familiar illustration of levers of the second kind [class]." —Quackenbos 1859...

Compound lever
"When several simple levers are connected together, and act one upon the other, the machine is called a compound lever." -Comstock 1850...

Compound lever
"In compound levers, equilibrium is established when the power, multiplied by the first arms of all the levers, is equal to the weight multiplied by the last arms of all the levers." —Quackenbos...

Crowbar
"... shows one of the commonest (sic) forms in which this kind of lever appears,-the crowbar. The power is applied at the handle. The weight is at the other end, and consists of something to be moved....

Crowbar and stone
"... a farmer with a crowbar, as shown, can move a rock which with his hands alone he could not stir." —Quackenbos 1859...

First class
A lever of the first class...

First class lever
"A lever is an inflexible bar freely movable about a fixed axis called the fulcrum. If the fulcrum is between the power and weight, the lever is of the first class." — Avery, 1895...

First class lever
"First class lever." -Comstock 1850...

First class lever
"A Lever of the First Kind is one in which the fulcrum is between the power and the weight... where F represents the fulcrum, P the power, and W the weight." —Quackenbos 1859...

First-class lever
"First class lever." -Comstock 1850...

Fulcrum, Man with Lever and
"In mechanics, the point of rest about which a lever turns in lifting a body; also, a prop or support for a lever at this point. F, Fulcrum; L, lever." -Whitney, 1911...

Lever
"In mechanics, the word 'machine' signifies an instrument for the conversion of motion or the transference of energy." -Avery 1895...

Lever
"The object W to be lifted is called the weight; the force is represented by P; the point, or pivot, F is called the fulcrum." —Hallock 1905...

Lever
"The object W to be lifted is called the weight; the force is represented by P; the point, or pivot, F is called the fulcrum." —Hallock 1905...

Lever
"The object W to be lifted is called the weight; the force is represented by P; the point, or pivot, F is called the fulcrum." —Hallock 1905...

Lever of the first class
Lever of the first class....

Lever of the second class
Lever of the second class....

Lever of the third class
Lever of the third class....

Lever, First Class
"The lever of the first class has the fulcrum between the power and the weight." Examples: a common crowbar, a pump handle, scissors, a seesaw. -Foster, 1921...

Lever, First Kind of
"In straight levers of the first kind, the fulcrum is between the power and the resistance, as in fig 1, where F is the fulcrum of the lever AB; P is the power, and W the weight or resistance."—...

Lever, Second Class
"The lever of the second class has the weight between the power and the fulcrum." Examples: a nutcracker, a wheelbarrow. -Foster, 1921...

Lever, Second Kind of
"In the second order of levers, the resistance is between the fulcrum and the power; and, as before, P : W :: BF : AF, but the pressure of the fulcrum is equal to W-P, or the weight less the power."&m...

Lever, Third Class
"The lever of the third class has the power between the weight and the fulcrum." Examples: sewing machine treadle, forearm. -Foster, 1921...

Lever, Third Kind of
"In the third order of lever the power acts between the prop and the resistance, where also P : W :: BF : AF, and the pressure on the fulcrum is P-W, or the power less the weight."——Pettig...

Safety-valve, Lever
A safety-valve, in which a weight is employed. Here a is the valve, b b the boiler, c c the valve-seat, usually, like the valve itself, made of gunmetal, d the lever turning upon a fixed center at e, ...

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	Chipping knife "The common chipping-knife, used by apothecaries, and represented [here], is a familiar illustration of levers of the second kind [class]." —Quackenbos 1859...
	Compound lever "When several simple levers are connected together, and act one upon the other, the machine is called a compound lever." -Comstock 1850...
	Compound lever "In compound levers, equilibrium is established when the power, multiplied by the first arms of all the levers, is equal to the weight multiplied by the last arms of all the levers." —Quackenbos...
	Crowbar "... shows one of the commonest (sic) forms in which this kind of lever appears,-the crowbar. The power is applied at the handle. The weight is at the other end, and consists of something to be moved....
	Crowbar and stone "... a farmer with a crowbar, as shown, can move a rock which with his hands alone he could not stir." —Quackenbos 1859...
	First class A lever of the first class...
	First class lever "A lever is an inflexible bar freely movable about a fixed axis called the fulcrum. If the fulcrum is between the power and weight, the lever is of the first class." — Avery, 1895...
	First class lever "First class lever." -Comstock 1850...
	First class lever "A Lever of the First Kind is one in which the fulcrum is between the power and the weight... where F represents the fulcrum, P the power, and W the weight." —Quackenbos 1859...
	First-class lever "First class lever." -Comstock 1850...
	Fulcrum, Man with Lever and "In mechanics, the point of rest about which a lever turns in lifting a body; also, a prop or support for a lever at this point. F, Fulcrum; L, lever." -Whitney, 1911...
	Lever "In mechanics, the word 'machine' signifies an instrument for the conversion of motion or the transference of energy." -Avery 1895...
	Lever "The object W to be lifted is called the weight; the force is represented by P; the point, or pivot, F is called the fulcrum." —Hallock 1905...
	Lever "The object W to be lifted is called the weight; the force is represented by P; the point, or pivot, F is called the fulcrum." —Hallock 1905...
	Lever "The object W to be lifted is called the weight; the force is represented by P; the point, or pivot, F is called the fulcrum." —Hallock 1905...
	Lever of the first class Lever of the first class....
	Lever of the second class Lever of the second class....
	Lever of the third class Lever of the third class....
	Lever, First Class "The lever of the first class has the fulcrum between the power and the weight." Examples: a common crowbar, a pump handle, scissors, a seesaw. -Foster, 1921...
	Lever, First Kind of "In straight levers of the first kind, the fulcrum is between the power and the resistance, as in fig 1, where F is the fulcrum of the lever AB; P is the power, and W the weight or resistance."—...
	Lever, Second Class "The lever of the second class has the weight between the power and the fulcrum." Examples: a nutcracker, a wheelbarrow. -Foster, 1921...
	Lever, Second Kind of "In the second order of levers, the resistance is between the fulcrum and the power; and, as before, P : W :: BF : AF, but the pressure of the fulcrum is equal to W-P, or the weight less the power."&m...
	Lever, Third Class "The lever of the third class has the power between the weight and the fulcrum." Examples: sewing machine treadle, forearm. -Foster, 1921...
	Lever, Third Kind of "In the third order of lever the power acts between the prop and the resistance, where also P : W :: BF : AF, and the pressure on the fulcrum is P-W, or the power less the weight."——Pettig...
	Safety-valve, Lever A safety-valve, in which a weight is employed. Here a is the valve, b b the boiler, c c the valve-seat, usually, like the valve itself, made of gunmetal, d the lever turning upon a fixed center at e, ...