ClipArt ETC
"The "roller" chain consists of a series of outside and inside links. The outside link A is made up of two steel side plates P united by two shouldered rivets R. The inside link B consists of two side plates P united by two tubular pieces T, which form bushes for the rivets R and pivots for the rollers L. The rivets, bushes and rollers are case-hardened." — The Encyclopedia Britannica, 1910

Bicycle Chain

"The "roller" chain consists of a series of outside and inside links. The outside link A is made up…

A coupling is a device used to connect two shafts together at their ends for the purpose of transmitting power. Couplings do not normally allow disconnection of shafts during operation, though there do exist torque limiting couplings which can slip or disconnect when some torque limit is exceeded.

Electrical Coupling

A coupling is a device used to connect two shafts together at their ends for the purpose of transmitting…

Circuit protecting fuse contained within a wire.

Fusible Link

Circuit protecting fuse contained within a wire.

Padlocks are portable locks used to protect against theft, vandalism, sabotage, espionage, unauthorized use, and harm. They are designed to protect against some degree of forced and surreptitious entry.

Mechanism Depiction of a, Padlock

Padlocks are portable locks used to protect against theft, vandalism, sabotage, espionage, unauthorized…