"Arc lamp mechanism with series regulating coil." —Croft 1917

Arc Lamp Series Regulating Coil

"Arc lamp mechanism with series regulating coil." —Croft 1917

An illustration of an electric bell. "The magnetizing coils are a a, and they are connected with their terminals at binding posts b1, b2. When these binding posts are connected with the electric current and the circuit is closed, the armature, at d, will be attracted, and will push the hammer e upon the bell. When the armature is attracted, the spring f leaves the screw contact g, against which it rests." -Foster, 1921

Electric Bell

An illustration of an electric bell. "The magnetizing coils are a a, and they are connected with their…

"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;…

"Place the cutoff at the center notch; cock the arm and turn the safety lock to a vertical position, raise the bolt handle and draw out the bolt." — Moss, 1914

Bolt mechanism dismounting

"Place the cutoff at the center notch; cock the arm and turn the safety lock to a vertical position,…

An illustration of the interior of a common English House Clock.

English House Clock

An illustration of the interior of a common English House Clock.

"A drill to which a steady momentum is imparted by means of a fly-wheel having a reciprocating motion like that of the balance-wheel of a watch." -Whitney, 1911

Fly Drill

"A drill to which a steady momentum is imparted by means of a fly-wheel having a reciprocating motion…

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.

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.

This invention relates to heat presses and, more particularly, to heat presses that are easy to use and expandable for greater workloads.

Hat Pressing Machine

This invention relates to heat presses and, more particularly, to heat presses that are easy to use…

"Its mechanism may be understood by the means of the subjoined figure, B represents the end of the beam, which is pulled downward, and pushed upward, by the motion of the piston-rod R P; the motion of B is in the direction of the dotted curve; that of R P is rectilinear." —Comstock, 1850

Parallel Motion

"Its mechanism may be understood by the means of the subjoined figure, B represents the end of the beam,…

For removing a hinge pin, a tool having a wedge-shaped head mounted on a shank equipped with a support projection to receive the hinge. The head includes an impact surface for hammering the wedge portion between the hinge and the head of the hinge pin. A striker plate perpendicular to the tool shank receives impact blows to dislodge the pin from the hinge.

Pin Removal Tool

For removing a hinge pin, a tool having a wedge-shaped head mounted on a shank equipped with a support…

Pressure regulator is a valve that automatically cuts off the flow of a liquid or gas at a certain pressure.

Pressure Regulator

Pressure regulator is a valve that automatically cuts off the flow of a liquid or gas at a certain pressure.

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

Control consisting of a mechanical device for controlling the flow of a fluid

Fluid Valve

Control consisting of a mechanical device for controlling the flow of a fluid

A road vehicle like this one is a mechanical means of conveyance, a carriage or transport. Vehicles may be propelled or pulled by engines or animals including humans, for instance, a chariot, a stagecoach, a mule-drawn barge, an ox-cart or rickshaw. However, animals on their own, though used as a means of transport, are not called vehicles, but rather beasts of burden or draft animals. This distinction includes humans carrying another human, for example a child or a disabled person.

Road Vehicle

A road vehicle like this one is a mechanical means of conveyance, a carriage or transport. Vehicles…

A tracked vehicle is a vehicle that runs on continuous tracks instead of wheels. The principal design advantages of tracked over wheeled vehicles are that they are in contact with a larger surface area than would generally be the case with a wheeled vehicle, and as a result exert a much lower force per unit area on the ground being traversed than a conventional wheeled vehicle of the same weight.

Traction Vehicle

A tracked vehicle is a vehicle that runs on continuous tracks instead of wheels. The principal design…