Practical Mechanics for Boys Part 21

In making an application for a patent, a pet.i.tion is required, a specification showing its object, use, and particular construction, followed by a claim, or claims, and accompanied by a drawing, if the invention will permit of it, (which must be made in black, with India ink), and an oath.

The oath requires the following a.s.sertions: That the applicant is the first and original inventor of the device, and that he does not know and does not believe the same was ever known or used before his invention or more than two years before his application.

He must also further allege that the invention was not patented or described in any printed publication here or abroad, and not manufactured more than two years prior to the application, and that he has not made an application, nor authorized any one to do so more than two years prior to his application.

The first Government fee is $15, payable at the time of filing, and the second and final fee is $20, payable at the time the patent is ordered to issue.

The filing of an application for patent is a secret act, and the Patent Office will not give any information to others concerning it, prior to the issue of the patent.

GLOSSARY OF WORDS

USED IN TEXT OF THIS VOLUME

Abrupt. Suddenly; coming without warning.

Abrasive. A material which wears away.

Actuate. Influenced, as by sudden motive; incited to action.

Acc.u.mulate. To bring together; to ama.s.s; to collect.

Acoustics. The branch of physics which treats of sound.

Adhesion. To hold together; a molecular force by means of which particles stick together.

Affinity. Any natural drawing together; the property or force in chemicals to move toward each other.

Aggravate. To incite; to make worse or more burdensome.

Alloy. A combination of two or more metals.

Alt.i.tude. Height; a vertical distance above any point.

Alkali. Any substance which will neutralize an acid, as lime, magnesia, and the like.

Amalgam. Any compound of metal which has mercury as one of the elements.

Amiss. Wrong, fault, misdeed.

Annealing. A process of gradually heating and cooling metals, whereby hardness and toughness are brought about.

Angle plate. A metal structure which has two bodies, or limbs, at right angles to each other.

a.n.a.lysis. The separating of substances into their elementary forms.

Anchor bolt. A structure intended to be placed in a hole in a wall, and held there by a brew which expands a part of the structure.

Apprentice. One who is learning a trade or occupation.

Artificial. That which resembles the original; made in imitation of.

Arbor. A shaft, spindle, mandrel, or axle.

Armature. A metallic body within the magnetic field of a magnet.

Arbitrary. Stubborn determination. Doing a thing without regard to consequences.

Artisan. One skilled in any mechanical art.

Attributable. That which belongs to or is a.s.sociated with.

Automatically. Operating by its own structure, or without outside aid.

Augmented. Added to; to increase.

Auxiliary. To aid; giving or furnishing aid.

Avoirdupois. The system of weights, of which the unit is sixteen ounces.

Back-saw. A saw which has a rib at its upper margin.

Barleycorn. A grain of barley.

b.a.s.t.a.r.d. A coa.r.s.e-grained file.

B. T. U. British Thermal Unit.

Back-gear. That gear on a lathe for changing the feed.

Bevel. Not in a right line; slanting; oblique.

Bibb. A form of water faucet.

Bit, or bitt. A form of tool for cutting purposes on a lathe, planer, shaper, or drilling machine.

Borax. A white crystalline compound, of a sweetish taste.

Chemically it is sodium biborate.

Buffs. Usually a wheel covered with leather or cloth, and having emery dust on it, for fine polishing purposes.

Buffeted. Thrown back.

Bronze. An alloy of copper and tin.

Calcium. Lime.