"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…

"Roller and Clearer Carding Machine." — Encyclopedia Britannica, 1893

Carding Machine

"Roller and Clearer Carding Machine." — Encyclopedia Britannica, 1893

A caster (or castor) is an undriven, single, double, or compound wheel mounted on an object to make movement easier.

Wheel Caster

A caster (or castor) is an undriven, single, double, or compound wheel mounted on an object to make…

"The Chica Ballapura engine consists of two upright rollers, A, the heads of which are formed into double spiral screws, B, which work in one another, so that when an ox is yoked to the long curved lever C, and goes round, one of the upright rollers, being connected with the lever, is made to revolve, and its screw carries the other one round but in the opposite direction." — Chambers, 1881

Chica Ballapure engine

"The Chica Ballapura engine consists of two upright rollers, A, the heads of which are formed into double…

Roller contact timer.

Contact Timer

Roller contact timer.

"Rollers of cube-cutting machine." — Encyclopedia Britannica, 1893

Cube-cutting

"Rollers of cube-cutting machine." — Encyclopedia Britannica, 1893

"Granulating machine. A, hopper, with raising arrangement; B, endless band; C, C, C, C, four pairs of rollers; D, D, D, short screens; E, E, long screens; F, box for dust; G, box for grain; H, box for chucks; K, bottom board." — Encyclopedia Britannica, 1893

Granulating Machine

"Granulating machine. A, hopper, with raising arrangement; B, endless band; C, C, C, C, four pairs of…

"Breaking-down Machine. H, hopper; B, endless band; R, rollers; M, boxes to receive meal." — Encyclopedia Britannica, 1893

Gunpowder Mill

"Breaking-down Machine. H, hopper; B, endless band; R, rollers; M, boxes to receive meal." — Encyclopedia…

"Finally, the leather is rolled and compressed on a level zinc-lined wooden bed by a heavy hand roller, or on the platform of one of the numerous forms of machines designed for that purpose." —The Encyclopedia Britannica, 1910

Hand Roller

"Finally, the leather is rolled and compressed on a level zinc-lined wooden bed by a heavy hand roller,…

"It is often essential that the land be compacted after it has been spaded or hoed, and some kind of hand-roller is then useful. Very efficient iron rollers are in the market, but a good one can be made from a hard cestnut or oak log." — Baily, 1898

Hand-roller

"It is often essential that the land be compacted after it has been spaded or hoed, and some kind of…

Atwater-Kent Interrupter.

Interrupter

Atwater-Kent Interrupter.

An agricultural tool used for flattening land and breaking up large pieces of dirt.

Iron Roller

An agricultural tool used for flattening land and breaking up large pieces of dirt.

"Morse magnetic telegraph will be understood by reference to the accompanying diagram, which represents the construction and arrangement of this form of telegraph. F and E are pieces of soft iron surrounded by coils of wire, which are connected at a and b with wires proceeding from a galvanic battery. When a current is transmitted from a battery located one, two, or three hundred miles, as the case may be, it passes along the wires and into the coils surrounding the pieces of soft iron F and E, thereby converting them into magnets. Above these pieces of soft iron is a metallic bar or lever, A, supported on its center, and haing at one end the arm D, and at the other a small steel point, o. A ribbon of paper, p h, rolled on the cylinder B, is drawn slowly and steadily off by a train of clock-work, K, moved by the action of the weight P on the cord C. This clock-work gives motion to two metal rollers, G and H, between which the ribbon of paper passes, and which, turnin in opposite directions, draw the paper from the cylinder B. The roller H has a groove arond its circumference (not represented in the engraving) above which the paper passes. The steel point, r, or the lever, A, is also directly opposite this groove. The spring r prevents the point from resting upon the paper when the telegraph is not in operation." —Wells, 1857

Magnetic Telegraph

"Morse magnetic telegraph will be understood by reference to the accompanying diagram, which represents…

An agricultural tool used for flattening land and breaking up large pieces of dirt.

Press-Wheel Roller

An agricultural tool used for flattening land and breaking up large pieces of dirt.

Rollers actually perform somersaults while flying.

Roller

Rollers actually perform somersaults while flying.

Rollers actually perform somersaults while flying.

Roller

Rollers actually perform somersaults while flying.

A roller. Crushes clods and packs the surface so as to keep the seed moist at the expense of increased evaporation.

Roller

A roller. Crushes clods and packs the surface so as to keep the seed moist at the expense of increased…

A cylinder of wood, stone, metal, etc., used in husbandry and the arts.

Roller

A cylinder of wood, stone, metal, etc., used in husbandry and the arts.

Roller, washing, machine,

Roller Washing Machine

Roller, washing, machine,

The common roller, which subsists on a diet of fruits and insects. It builds its nests in the holes of trees, or sometimes in the banks of rivers.

Common Roller

The common roller, which subsists on a diet of fruits and insects. It builds its nests in the holes…

A simple device to make holding towels easy.

Towel Roller

A simple device to make holding towels easy.

An implement used by plumbers in screwing together or unscrewing lengths of pipes.

Pipe Tongs

An implement used by plumbers in screwing together or unscrewing lengths of pipes.

A tool having one jaw movable and the other relatively fixed, the two being shaped as to bite together when placed on a pipe and rotated in one direction.

Pipe Wrench

A tool having one jaw movable and the other relatively fixed, the two being shaped as to bite together…