Specification for a Machine.

of the invention], which he verily believes has not been known or used prior to the invention thereof by your petitioner. He therefore prays that letters patent of the United States may be granted to him therefor, vesting in him and his legal representatives the exclusive right to the same, upon the terms and conditions expressed in the acts of Congress in that case made and provided; he having paid fifteen dollars into the treasury, and complied with the other provisions of the said acts. A. B.

1120. General Form of Specification for a New Machine.(b)

BE IT KNOWN, that I, A. B., of

have invented a new and useful machine for [state the use and title of the machine], * and I do hereby declare that the following is a full, clear and exact description of the construction and operation of the same;

Drawings and Models.

reference being had to the annexed drawings, making a part of this precation-in which, figure one is a perspective view; figure two a longitudina elevation; figure three a transverse section, etc. [thus describe all the sec’ins of the drawings, and then refer to the parts by letters].

[Then follows the description of the construction and operation of tha machine; and lastly the claim, which should express the nature and characte of the invention, and identify the parts claimed separately or in combinaʻin

venient size to exhibit advantageously its other soft wood, it should be p several parts."

The drawings must be signed by the applicant, and attested by two witnesses. They must be neatly and artistically executed in fast colors, on one or more sheets separate from the specification, the size of the sheets to be twenty inches from top to bottom, and fifteen across, this being the size of the patent. One of these drawings, to be kept in the office for reference, must be on thick drawingpaper, sufficiently stiff to support itself upright in the portfolios. Tracings upon cloth, pasted upon thick paper, will not be admitted. The other drawing, which is to be attached to the patent, must have a margin of one inch at least for that purpose on the right-hand side, and should be on tracing muslin, which will bear folding and transportation, and not on paper. The drawings should generally be in perspective, with such detached sectional and plane views as to clearly show what is the invention, its construction and operation. All thick drawings should be colored and shaded; and when different materials are united in a machine, as steel and iron, or wood and metal, the distinction should be indicated by different colors on the drawings. Each part must be distinguished by the same number or letter, whenever that part is delineated in the drawings.

Applicants are advised to employ competent artists to make the drawings, which will be returned if not executed in conformity with these rules. Thick drawings should never be folded for transmission.

A model is required in every case where the nature of the invention admits of such illustration.

The model must be neatly and substantially made of durable material, and not more than one foot in length or in height, unless a larger model is necessary to exhibit the invention. If made of pine or

stained or varnished. Models Bed a exhibits, in interference and other may be returned to the applicant, at thi discretion of the commissioner.

A working model is always desaslı, in order to enable the office fa readily to understand the precise per tion of the machine. The name of the inventor (and also of the assignee, f invention has been assigned), and as the title of the invention, must be re upon it in a permanent manner. When the invention is a composition a matter, a specimen of each of the gredients and of the composition as accompany the application, and the nat of the inventor and of the assigne there be one) must be permanenty thereto.

When a work of design can be sa ficiently represented by a drawing a model will not be required.

Photographs are admitted for the las tration of works of design, and must be pasted on thick drawing-paper and trading muslin, of the size prescribed for drașings; but in every case where this of illustration is employed by an appa for a patent, he will be required to depos in the office the glass or other "negative" from which the photograph is printed, s that exact official copies may be mad therefrom when desirable.

It is strongly recommended thst every thing needed to make the applicatist complete, the petition, specification and oath, the drawings and models, or specmens of ingredients, and the fee, or Und States officer's receipt for payment of the amount, should all be forwarded ston and the same time. No advantage > gained by forwarding one before anche, as no application is put upon file in tat office for examination, until all have beea received.

Specification for an Improvement.

1121. General Form of Specification for an Improvement Upon an Existing

Machine.

BE IT KNOWN, that I, A. B., of in the county of

and State of , have invented a new and useful improvement on a [or, on the] machine, etc. [continue as in preceding form from the *, except that in stating the claim, the existing machine should be disclaimed, and the claim confined to the improvement].

1122. Example of a Specification for an Improvement in the Steam-Engine.(c)
TO ALL WHOM IT MAY CONCERN:

of

in the county of V in the State

Be it known, that I, A. B., of
have invented a new and improved mode of preventing steam-
boilers from bursting; and I do hereby declare that the following is a full
and exact description thereof, reference being had to the accompanying
drawings, and to the letters of reference marked thereon.

The nature of my invention consists in providing the upper part of a
steam-boiler with an aperture in addition to that for the safety-valve; which
aperture is to be closed by a plug or disk of alloy, which will fuse at any
given degree of heat, and permit the steam to escape, should the safety-
valve fail to perform its functions.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation. I construct my steamboiler in any of the known forms, and apply thereto gauge-cocks, a safetyvalve, and the other appendages of such boilers; but, in order to obviate

4, 1836, prescribes the general requisites
of the oath, as follows: The applicant
shall make oath or affirmation that he
does verily believe that he is the original
and first inventor or discoverer of the art,
machine, composition or improvement,
for which he solicits a patent; and that he
does not know or believe that the same
was ever before known or used; and also
of what country he is a citizen; which
oath or affirmation may be made before
any person authorized by law to admin-
ister oaths.

(c) The chief demand for pains and skill in the preparation of patent papers is in the drafting the specification and claim. It is impracticable, however, to give forms which can be of much aid as guides in this part of the work, since every part of the phraseology employed depends on the character and peculiarities of the invention to be patented. A thorough and exact knowledge of the nature of the invention, a general acquaintance with the branch of art or science to which it belongs, or with which it is most nearly connected, a conversance with existing By section 4 of the act of Congress of inventions in the same department, and August 29, 1842, it is enacted, that the habits of clearness, conciseness and ac- oath required for applicants for patents curacy, in the use of terms of art and may be taken, when the applicant is not, science, are indispensable to success in for the time being, residing in the United this branch of drafting. The forms given States, before any, minister plenipotenin the text follow closely those which have tiary, chargé d'affaires, consul or combeen officially issued by the Patent office, mercial agent, holding commission under and will show the general outline to be the Government of the United States, or adopted. before any notary public of the foreign Section 6 of the act of Congress of July country in which such applicant may be.

Oath.

Petition.

the danger arising from the adhesion of the safety-valve, and from other causes, I make a second opening in the top of the boiler, similar to that made for the safety-valve, as shown at A, in the accompanying drawing; and in this opening I insert a plug or disk of fusible alloy, securing it in its place by a metal ring and screws, or otherwise. In general, I compose this fusible metal of a mixture of lead, tin and bismuth, in such proportions as will insure its melting at a given temperature, which must be that to which it is intended to limit the steam; it will, of course, vary with the pressure the boiler is intended to sustain.

I surround the opening containing the fusible alloy by a tube B, intended to conduct off any steam which may be discharged therefrom. When the temperature of the steam in such a boiler rises to its assigned limit, the fusible alloy will melt and allow the steam to escape freely, thereby securing it from all danger of explosion.

WHAT I CLAIM as my invention, and desire to secure by letters patent, is the application to steam-boilers of a fusible alloy which will melt at a given temperature and allow the steam to escape, as herein described, using for the purpose the aforesaid metallic compound, or any other substantially the same, and which will produce the intended effect.

Witnesses:

M. N.
O. P.

A. B.

STATE OF

County of
On this

day of

1123. Oath; By a Citizen.

, per

18 before me, the subscriber, a sonally appeared the within-named A. B., and made solemn oath [or, affirmation] that he verily believes himself to be the original and first inventor of the mode herein described for preventing steam-boilers from bursting; and that he does not know or believe the same was ever before known or used; and that he is a citizen of the United States.

[Signature of officer.]

1124. Oath by an Alien who has Taken Steps to Become Naturalized.(d) [As in the preceding form to the *, continuing thus:] a native of the kingdom of ; that he has resided within the United States for the whole of the past year, and has taken the oath prescribed by law for becoming naturalized in this country.

[Signature of officer.]

THAT your petitioner has invented or produced a new and original design

(d) If the applicant is an alien, not residing in the United States, or if he has not taken the necessary steps to become

naturalized, the oath should be modified accordingly.

(e) Patents for designs are granted un

Specification for Design.

for [state the general nature of the design], which he verily believes has not been known prior to the production thereof by your petitioner. He therefore prays that letters patent of the United States may be granted to him therefor, for the term of three and a half [or, seven, or, fourteen] years, vesting in him and his legal representatives the exclusive right to the same, upon the terms and conditions expressed in the act of Congress in that case made and provided, he having paid ten [or, fifteen, or, thirty] dollars into the treasury, and complied with the other provisions of the said act.

1126. Specification for a Design.

Be it known, that I, A. B., of the town [or city] of

have originated and designed a new pattern [for carpets or other fabrics, or, a design for a trade-mark], of which the following is a full, clear and exact description, reference being had to the accompanying specimens or drawings, making part of this specification.

[Here give a description of the design, with references to the specimen or drawing, concluding with a "claim," as follows:] WHAT I CLAIM as my invention, and desire to secure by letters patent, is the design or pattern [for carpets or other fabrics, or, the design for a trade-mark] herein set forth. Witnesses: