We invite the attention of all persons using window blinds or shutters to the improved bolt here illustrated, which is adapted to fasten the blinds securely in a closed position, or to hold them partly open, as may be desired. Allong bolt, a, Figs. 1 and 2, is fitted to slide in a case, b, fastened to one of the blinds, and to enter the case. c, on the other blind of the pair. A hutton, e, is secured to the holt with its shank passing through a slot in the case, and the case is mnde a little wider than the bolt, allowing the lattcl' a little ,'e"tical piny, so that the shank of the buttoQ, e, may fall into the notches, ddd, in the case, to hold the bolt in place, or may be lifted out of them when it is desired to slide the bolt along. The blinds are fastened in a closed position by sliding the bolt forward with its end entirely through the case, e, as shown in Fig. l. For holding the shutters open, as shown in Fig. 2, a slot is cut through the casc, c, for the end of the bolt to enter, where it is hcld in place by the lip or hook projecting downward upon its end, the shank of the button, e, falling into one of the notches, d, to prevent the bolt from slipping in thecase,a. The end of the bolt is prevented from wearIng the wood of the blind where it passes through the slot in the case, c, by the curved plate, f, Fig. 3, which is fitted into tbe wood behind the plate, c. This shutter bolt is as simple in its construction as it is posi. tive, reliable and convenient in its operation, and we predict its introduction into vcry general usc. Patents for this invention have heen procured, thro11gh the Scientific American Patent Agency, both in this country and Great Britain, the American patent bearing date Sept. 18, 1860, and fnrther information in relation to it may he obtained by arldressing the inventor, Augustus Hcel'e, at Allowaystown, N. J.CHIMNEY PATENT CASE..—Judge Leavitt has furnished the Cincinnati Gazette with his Inte dccision in the Suit of C. Dodge and J. B. Ryan against T. F. Caird, for an infringement of their pateuts granted on the 18th of March, 1856, for an improvement in chimney flues. This improvement consists of the combination of a flat iron plnte placed horizontally above thc grate clOSing the throat of a chimney, with the exception of a narrow opening in front, for the escape of smoke, in connection with a small recess below the plate. The utility c1aimcd for the invention is that the uncomumed gas from the fire strikes against the plate in the chimney tbroat and is deflected into the recess below, where it is burned. The defendant denicd that he had infringed this patent. He also had obtained a patent in April last for an iron plate placed in an arched position in the chimney, which plate was cnpable ot being adjusted to suit the size of any fiue, without alteration. This arrangement prevented, to some extent, the hent from escaping up the chimncy without being utilized. This was the invention which he was using, and the Judge decided that it was different from the plaintiffs' patent, and refused to grant the injunction. STEAM FIRE ENGINES.— The recent accident to the Croton pipes brought most of the members of our Board of Aldermen to the conrlusion that it is best to provide every fire company iu the city with a steum fire engine; so this great reform seems about to be introduced by the strength of its own inherent merits. BINDING.—We are prepared to bind the yolume just closing, or any ot the previous volumes, in handsome muslin covers, with illuminated sides, and to furnish covers for other hinders. Price for hinding, 50 cents. Price for covers by mail, 50 cents; by express or delivered at the office, 40 cents.