CONSTRUCTIONS. The insulating material should be indicated as provided in the charts. Whitney, 110 O. G. 603. See Journal of American Society of Mechanical Engineers, Dec., 1912, page 48. As to colors, see M. Zimmerman Company, 127 O. G. 1991. "While a full and complete disclosure is essential, on the other hand, the invention should be disclosed in its simplest aspect. For instance, where the invention resides in a motor provided with a main field, an armature and a compensating winding, bearing certain space relations to each other, the invention is best illustrated by the simplest form of diagrammatic view (see Chart for Draftsmen, Rules of Practice) showing these parts conventionally in their proper space relations (Illus.-Pats., 946, 502; 1, 138, 673; 931, 336). To present working drawings or a photographic view of such a motor showing details of base supports, casings, journals and bearings, or even the specific form of pole pieces and windings, where such specific forms are not of the essence of the invention, not only places needless labor upon the office, but obscures the real invention. This is even more true of complicated systems of wiring involving many circuits Only circuits typical of the invention should be illustrated, and they in the simplest form possible, duplication being ordinarily avoided. An intricate working drawing of such a system is the bane of all who have to deal with it, and the amount of unnecessary time and labor in the aggregate, spent by the office, attorneys and the courts in deciphering it, both before and after patent, can not be estimated. If we multiply one such patent by the total number of this character among nearly one and a quarter million patents granted by our office we can appreciate what an unnecessary load our system labors under. "The main circuit and all apparatus connected in series therewith should be shown in heavy lines and, so far as practicable, in the same horizontal or vertical direction, while the shunt and control circuits should be shown in lighter lines, preferably at right angles thereto. Lines should cross as little as possible. The arrangement of apparatus should be such as to keep the groups distinct and clearly show their relations at a glance (Illus.-Pats., 1, 113, 199; 900, 707; 1, 170, 211). Much ingenuity can be displayed in skillfully arranging the parts of electrical systems and all work in connection therewith is ever afterward facilitated thereby. So vital is this to a clear understanding of the invention that in some cases in division 26, it is necessary for the examiner to make his own layout of the system in working up the case. "In the case of methods, each step of which involves a different particular arrangement of parts of an electrical system, in addition to the showing of the system the arrangement of parts for each step should be diagrammatically illustrated in the most conventional manner, the diagrams being arranged in the order of the steps. This is more important to a clear disclosure, even, than a complete layout of the system, including the controller features and connections, since given the sequence of steps desired the designer or draftsman may well supply the latter (Illus.-Pats., 527, 947; 516, 834; 1, 199, 453; 587, 340). "Where the drawing alone can not be made to tell the whole story of an invention, often a legend ap plied to a part will facilitate search. For instance, where it is essential that the field magnet of a dynamo electric machine be normally saturated, the addition of the words "normally saturated" discloses at a glance the essential characteristic of the device." -Richard E. Marine, Paper before Examining Corps. APPENDIX B. FORMS. PETITIONS. The forms given in the Rules of Practice are merely suggestive and not mandatory. Cook, 1892 C. D. 232, 61 O. G. 1480. No. 1. By a Sole Inventor. To the Commissioner of Patents: Your petitioner, zen of the United States and a resident of in the county of and State of subject, etc.), whose post-office address is ... ....., prays that letters patent may be granted to him for the improvement in .... set forth in the annexed specification. in the county Signed at (or, subjects, etc.), whose post-office addresses are, respectively, and ... ., pray that letters patent may be granted to them, as joint inventors, for the improve Two petitions may be used. S. T. and C. H. Wellman, 88 O. G. 2065. No. 3. By an Inventor, for Himself and Assignee. To the Commissioner of Patents: Your petitioner, zen of the United States and a resident of in the county of ... and State of .... subject, etc.), whose post-office address is ... a citi (or, prays that letters patent may be granted to himself and citizen of the United States and a resident of in the county of .. and State of whose post-office address is ... as his assignee, for the improvement in No. 4. Petition with Power of Attorney. To the Commissioner of Patents: Your petitioner, zen of the United States and a resident of in the county of ... and State of subject, etc.), whose post-office address is ... a citi (or, .. prays that letters patent may be granted to him for the improvement in ... set forth in the annexed specification; and he hereby appoints State of of his attorney, with full power of substitution and revocation, to prosecute this application, to make alterations and amendments therein, to receive the patent, and to transact all business in the Patent Office connected therewith. Last sentence sufficient authorization for signing and prosecuting renewal application. Agee, 101 0. G. 1609. No. 5. By an Administrator. To the Commissioner of Patents: Your petitioner, zen of the United States and a resident of in the county of .. and State of subject, etc.), whose post-office address is .. ... administrator of the estate of a citi (or, |