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- Hydraulic press, a hydrostatic press. See under Hydrostatic. -- Hydraulic propeller, a device for propelling ships by means of a stream of water ejected under water rearward from the ship. -- Hydraulic ram, a machine for raising water by means of the energy of the moving water of which a portion is to be raised. Wh…

A device for raising water by the direct action of steam; a pulsometer.

A device on a shield or seal, or used as a bookplate or the like. [Written also imprese and impress.] My impresa to your lordship; a swain Flying to a laurel for shelter. J. Webster.

A device. See Impresa. An imprese, as the Italians call it, is a device in picture with his motto or word, borne by noble or learned personages. Camden.

A device. See Impresa. Cussans. To describe . . . emblazoned shields, Impresses quaint. Milton.

A small vessel for holding ink, to dip the pen into; also, a device for holding ink and writing materials.

A device for opening and closing an electrical circuit; a vibrating spring or tuning fork, arranged to make and break a circuit at rapidly recurring intervals, by the action of the current itself.

That which is invented; an original contrivance or construction; a device; as, this fable was the invention of Esop; that falsehood was her own invention. We entered by the drawbridge, which has an invention to let one fall if not premonished. Evelyn.

o invents or finds out something new; a contriver; especially, one who invents mechanical devices.

A proposition or device for securing peace, especially in the church. South.

A device to pull off boots.

y, Jacquard, a French mechanician, who died in 1834. Jacquard apparatus or arrangement, a device applied to looms for weaving figured goods, consisting of mechanism controlled by a chain of variously perforated cards, which cause the warp threads to be lifted in the proper succession for producing the required figure.…

In deep well boring, a device resembling two long chain links, for connecting a percussion drill to the rod or rope which works it, so that the drill is driven down by impact and is jerked loose when jammed.

f a type, which is broken from it when the type is cold. Knight. Jet propeller (Naut.), a device for propelling vessels by means of a forcible jet of water ejected from the vessel, as by a centrifugal pump. -- Jet pump, a device in which a small jet of steam, air, water, or other fluid, in rapid motion, lifts or other…

ecious metal, and having enamel or precious stones as a part of its design. Plate of rare device, and jewels Of rich and exquisite form. Shak.

A ring, strap, clamp, or any device for holding an object in place; as: (a) The box on a door jamb into which the bolt of a lock protrudes, when shot. (b) A ring serving to keep another ring on the finger. (c) A loop near the buckle of a strap to receive the end of the strap.

Something performed, or to be done, requiring aptness and dexterity; a trick; a device. "The knacks of japers." Chaucer. For how should equal colors do the knack ! Pope.

" A knock at the door." Longfellow. A loud cry or some great knock. Holland. Knock off, a device in a knitting machine to remove loops from the needles.

a cam or the like for disconnecting something, as a device in a knitting machine to remove loops from the needles.

A device or mechanism for producing light by electricity. See Incandescent lamp, under Incandescent. Æolipile lamp, a hollow ball of copper containing alcohol which is converted into vapor by a lamp beneath, so as to make a powerful blowpipe flame when the vapor is ignited. Weale. -- Arc lamp (Elec.), a form of lamp i…