This bicycle stand features vertically adjustable brace bars which are hinged to an intermediate part of the upright.

Upright Bicycle Stand

This bicycle stand features vertically adjustable brace bars which are hinged to an intermediate part…

"Parts shown are handle, A; sleeve, B; safety lock, C; cocking peice, D; safety lug, E; extractor, F; extractor collar, G; locking lugs, H; extractor tongue groove, I, and gas escape hole, J." — Moss, 1914

Bolt mechanism

"Parts shown are handle, A; sleeve, B; safety lock, C; cocking peice, D; safety lug, E; extractor, F;…

"A key. The key was used in very early times, and was probably introduced into Greece from Egypt; although Eustathius states, that in early times all fastenings were made by chains, and that keys were comparatively of a much later invention, which invention he attributes to the Laconians. We have no evidence respecting the materials of which the Greeks made their keys, but among te Romans the larger and coarser sort were made of iron. Those discovered at Pompeii and elsewhere are mostly of bronze. The annexed woodcut represents a key found at Pompeii, the size of which indicated that it was used as a door key." — Smith, 1873

Clavis

"A key. The key was used in very early times, and was probably introduced into Greece from Egypt; although…

A fastener is a hardware device that mechanically joins or affixes two or more objects together. Fasteners can also be used to close a container such as a bag, a box, or an envelope; or they may involve keeping together the sides of an opening of flexible material, attaching a lid to a container, etc.

Fastening Device

A fastener is a hardware device that mechanically joins or affixes two or more objects together. Fasteners…

"Gun. A, breech; B, barrel; C, band; D, breech-block; E, butt; F, butt- or heel-plate; G, front sight or bead; H, guard- or trigger-plate; I, guard-bow; K, hammer; L, lock; M, peep-sight; N, N, pipes; O, pistol-grip; P, rear sight; Q, receiver; R, side-screws or -nails; S, S, stock; T, tip; U, trigger; V, wiping-rod." -Whitney, 1911

Parts of the Gun

"Gun. A, breech; B, barrel; C, band; D, breech-block; E, butt; F, butt- or heel-plate; G, front sight…

An illustration of a key.

Key

An illustration of a key.

Decorative lock and key.

Lock and Key

Decorative lock and key.

A key is an instrument that is used to operate a lock. A typical key consists of two parts like the one shown, the blade, which is the part that slides into the key way of the lock and distinguishes between different keys and the bow, which is left protruding so that torque can be applied by the user.

Multiple Purpose Key

A key is an instrument that is used to operate a lock. A typical key consists of two parts like the…

A fastening, as for a door or gate, typically consisting of a bar that fits into a notch or slot and is lifted from either side by a lever or string.

Door Latch

A fastening, as for a door or gate, typically consisting of a bar that fits into a notch or slot and…

A device for holding a door, gate, or the like, closed, consisting basically of a bar falling or sliding into a catch, groove, hole, etc.

Gate Latch

A device for holding a door, gate, or the like, closed, consisting basically of a bar falling or sliding…

Lock and key.

Lock

Lock and key.

This lock mechanism was improved for security allowing a two section stop where the key locks both directions.

Lock Mechanism

This lock mechanism was improved for security allowing a two section stop where the key locks both directions.

A device operated by a key, combination, or keycard and used, as on a door, for holding, closing, or securing.

Door Lock

A device operated by a key, combination, or keycard and used, as on a door, for holding, closing, or…

This is a lock for gate intended use; a device for opening and closing entrance to or from a passageway.

Gate Lock

This is a lock for gate intended use; a device for opening and closing entrance to or from a passageway.

A fastener fitted to a door or drawer to keep it firmly closed.

General Lock

A fastener fitted to a door or drawer to keep it firmly closed.

This is sash lock is a locking device which serves as a lock and release mechanism.

Sash Lock

This is sash lock is a locking device which serves as a lock and release mechanism.

A lock attached to the sashes of a double hung window that can fix both in the shut position

Window Lock

A lock attached to the sashes of a double hung window that can fix both in the shut position

"The lock C is a controllable compartment with raise-able and lower-able gates D and E. Since water always finds its level, by raising and lowering the gates, two separate water levels can be maintained and still provide water transportation through the lock." —Quackenbos 1859

Locks

"The lock C is a controllable compartment with raise-able and lower-able gates D and E. Since water…

This Melting Grotesque Mask has an escutcheon design of a lock during the German Renaissance.

Melting Grotesque Mask

This Melting Grotesque Mask has an escutcheon design of a lock during the German Renaissance.

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.

Early Use Padlock

Portable locks used to protect against theft, vandalism, sabotage, espionage, unauthorized use, and…

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…

A device used to attach an oar to a row boat.

Rowlock

A device used to attach an oar to a row boat.

A common household safe used to store valuable items.

Safe

A common household safe used to store valuable items.

This mechanism features an automatic lock that also operates a latch action with lever handles

Automatic Sashlock

This mechanism features an automatic lock that also operates a latch action with lever handles