A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.

Circuit Breaker

A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit…

A hollow sphere of ball attached to the end of a lever, which turns the stop—cock of a water pipe and regulates the supply of water.

Ball Cock

A hollow sphere of ball attached to the end of a lever, which turns the stop—cock of a water pipe…

The electrical symbol for contact points such as switches or distributors.

Contact Points

The electrical symbol for contact points such as switches or distributors.

In the electrical distribution utility industry a cutout is a combination fuse and switch used in primary overhead feeder lines and taps to protect step down transformers from current surges and overloads.

Electric Cut Out

In the electrical distribution utility industry a cutout is a combination fuse and switch used in primary…

Part section of Delco starting switch.

Delco

Part section of Delco starting switch.

Prior to the toggle switch a popular design was the push-button switch, composed of a depressed button oriented below or beside a raised button. Pushing the raised button opens or closes the contacts while popping out the previously depressed button so the process can be reversed. Push button switch reproductions are available on the market today for vintage or authentic styling.

Electric Push Button

Prior to the toggle switch a popular design was the push-button switch, composed of a depressed button…

This faucet includes a self closing faucet handle having an escapement mechanism in series with both a release ratchet and a slip clutch to provide ease in turning on the faucet and the option of a quick manual closing of the faucet valve. The ratchet escapement mechanism and slip clutch are all concealed within the shell of a blade handle that is rotated between the on and off positions.

Self Closing Faucet

This faucet includes a self closing faucet handle having an escapement mechanism in series with both…

Gray & Davis starting motor with reduction gearing for open flywheel. 1-Motor Pinion; 2-Intermediate Gear; 5-Intermediate Shaft; 6-Sliding Pinion; 7-Shifter Fork; 8-Shifter Rod; 10-Clevis; 12-Switch Rod; 23, 24, and 25-Oilers; 26-Oil Plug.

Gray and Davis Motor

Gray & Davis starting motor with reduction gearing for open flywheel. 1-Motor Pinion; 2-Intermediate…

A device for connecting wires from a battery.

Du Bois-Reymond's Key

A device for connecting wires from a battery.

A key used to connect wires from a battery using mercury.

Mercury Key

A key used to connect wires from a battery using mercury.

Remote control oil switch in masonry-cell mounting.

Oil Switch

Remote control oil switch in masonry-cell mounting.

Shaft carrying switch-contact and gear-shifting.

Shaft

Shaft carrying switch-contact and gear-shifting.

Wiring diagram for Gray & Davis single-wire system with grounded switch.

Single-Wire System

Wiring diagram for Gray & Davis single-wire system with grounded switch.

Dean Knife starting switch.

Starting Switch

Dean Knife starting switch.

Gray & Davis starting switch with both terminals insulated.

Starting Switch

Gray & Davis starting switch with both terminals insulated.

In electronics, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another.

Electric Switch Handle

In electronics, a switch is an electrical component that can break an electrical circuit, interrupting…

A Westinghouse canopy switch. This switch is used in powering trolleys. They are used to break circuits from 200 to 300 amperes.

Canopy Switch

A Westinghouse canopy switch. This switch is used in powering trolleys. They are used to break circuits…

a mechanical, electrical, electronic, or optical device for opening or closing a circuit or for diverting energy from one part of a circuit to another

Electrical Switch

a mechanical, electrical, electronic, or optical device for opening or closing a circuit or for diverting…

"Showing the construction of a quick-break knife switch." —Croft 1920

Quick-brake Knife Switch

"Showing the construction of a quick-break knife switch." —Croft 1920

"A series-circuit service switch or cut-out." —Croft 1920

Series Circuit Switch

"A series-circuit service switch or cut-out." —Croft 1920

A three-way switch that was used to cut the headlights of a trolley and subsequently turn on the taillights. K is the switch blade, and L is a spring contact clip, three of which are raised on 'posts' (L1 is not raised).

Three-way Switch

A three-way switch that was used to cut the headlights of a trolley and subsequently turn on the taillights.…

"A two-pole front-connected knife switch fused a the handle end." —Croft 1920

Two-pole Knife Switch

"A two-pole front-connected knife switch fused a the handle end." —Croft 1920

A cup shaped or conical valve which is guided by a stem to and from its flaring seat.

Cup Vavle

A cup shaped or conical valve which is guided by a stem to and from its flaring seat.