J Citutific !tutricau. 121 RECENTLY PATENTED INVENTIONS,. Engineering. ROTARY ENGINE.-GeorgeH. Graham, Ridgeland, III. This engine is designed to be simple and durable in con.truction ",hile being very effectIVe in operation and utilizing the motive power to the fullest advantage. The invention provides principally a spring-pressed valve within a casing in which a friction roller is journaled and from which a valve stem extends, a lever being pivoted on the stem and springs pressing against the

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... lever, there being a lubricant-re ceiving space in the rear of the roller. Three of these valves, arranged radially and sliding in suitable bear ings in the rim of the cy linder, are locate!l on the peri pheral surface of the piston, between the vanishmg points of curved flanges arranged near the ends of a radIally extending head of tbe piston, close to the inner sides of the cylinder. ling is practically a double one, and should one of the latches be broken by a strain, the other one would hold to prevent the separation of the cars. RAILROAD SWITCH.-Clifford E. Now· lin, Battle Creek, MICh. This switch is designed to be conveniently operated from an engine or car to facili tate the switching of trains and allow them to make a SIding quickly and with perfect safety. The switch rails are supported by a movable switch plate to which are s�cured cables extending parallel with the track and extending over guide pulleys and "procket wheels, above which are mounted spring.pressed castings, con nected with the sprocket wheels by a pitman and crank. Side rails arranged parallel with the track are pivoted to the castings, and means are provided for depreSSIng the side rails from the train, the mechanislll consisting of a sleeve on the locomotive in which is held a spring pressed shaft carryine: a contact wheel, there bein!' a cushion for the shaft and a screw mechanism for ad justing it. vertical portion at its rear, on the front edge of which upon which the npper cutters work. An improved ie a series of gauge marks to serve as a wind gauge, and means is also provided of applying pressure to the indicate the degree to which thn supplemental base upper cutters, to maintain a constant steady pressure should be moved to one side or the other; The sight is suffiCient to insure efficient cutting action without re designed to be easily brought to any desired adjustment quiring great nicety or care in making the adjust to enable the rifie to be quickly and accurately aimed. ment. CAPODASTRO. -Henry D a hIm a n, PNEUMATIC TIRE.-William R. Foster, BOILER FEEDER. -Heinrich Rauser, In combination with the boiler aLd feed pump is an ejector connected with the boiler and in communication Cambridge, Minn., and Theodor Blomgren, Stanch-Bermondsey, England. A tubular tire with closed ends field, Minn. This invention consists of a cushioned plate wrapped around the wheel rim, the ends tapered to lap adapted to extend across the strings on the neck of the over each other and make a scarf joint, is combined mstrument, a yoke pivotally connected with the plate, with a pcket or cover in the forIfl of a complete annulus a clamping arm pivoted OIl the yoke and adapted to enof nearly tubular cross section, but with a slot ex gage with its free end the under side of the neck, and a tending around its inner circumference, the jacket hand lever to press the arm into contact with the neck being adapted to envelop the tire and its edges, and of the instrument. The device can be quickly and con-being detachably secured at intervals to the back of veniently placed andlocked in position. and is designed the wheel rim. With·this improvement the tire may to uniformly hold, quickly tie:hten, and shorten the be readily removed and replaced by another in case of vibrations of the several strin!!s on the neck of the in-injury without entirely removing the cover of the tire strument whenever it is desired to raIse the tone to a from the wheel, and without dismounting the wheel higher key. from the machine. WATCH IMPROVEMENT. -Roswell E.