DENTAL IMPRESSION CUP FOR LOWER JAW.--Robert V. Jenks, Paterson, N.J.--This invention has for its object to furnish an improved impression cup for use in taking a cast of the lower jaw, to form a model of said jaw to fit the plate upon, which shall be so constructed as to enable the dentist to take a more perfect cast than is possible with impression cups constructed in the ordinary manner. SHOW CARD SUSPENSION RING.--H.S. Griffiths, New York city.--This invention has for its object to furnish an improved suspension ring for suspending show cards, which shall be simple in construction and easily attached to the cards, and which shall, at the same time, be so formed as to take a firm hold upon the card, and not be liable to tear out. REFRIGERATOR.--Samuel Ayres, Danville, Ky.--This invention relates to improvements in refrigerators, and consists in certain improvements in the construction and arrangement for excluding the external atmosphere, distributing the cold by means of the ice, and also the water resulting therefrom; for economizing space, and for providing convenient access to all the different parts. CINDER AND DUST ARRESTER FOR CAR WINDOWS.--Edwin Norton, Brooklyn, N.Y.--This invention relates to improvements in apparatus for preventing the cinders and dust from being blown into the cars, when in motion, through the open windows, and consists in the application to the cars at the sides of the windows, on the exterior, by hinging thereto or by other equivalent connection, small guard plates of wood or other substance to project outwardly in a right or other suitable or preferred angle, at the side of the window, to arrest the cinder and dust moving rearward alongside of the car, and conduct it below the windows, the said guard plates being arranged so that those on the side of the windows in the direction of the movement of the train may be adjusted to the operating position while the others are folded back against the side of the car. HOSE COUPLING.--William J. Osbourne, New York city.--This invention relates to a new and useful improvement in couplings for hose pipe, whereby the parts of a hose are united in a more perfect manner than by the ordinary hose coupling. SAW GUIDE.--John Trunick, Muscatine, Iowa.--This invention relates to a new and useful improvement in means for guiding circular saws and keeping them to the true saw line. SQUARE, GAGE, AND LEVEL.--Josiah Potts, Milwaukee, Wis.--This invention relates to a new and useful improvement in a tool for mechanics' use and consists in combining with a try square, a spirit level and a surface gage. EXTENSION MUFF BLOCK.--C.F. Butterworth, Troy, N.Y.--This invention relates to a new and useful improvement in blocks for forming and stretching muffs in the process of manufacturing that article.