Take good linseed oil and boil it along with as much litharge as will make it of the consistency to be laid on with the brush. Lampblack is also put on at the rate of one part to every ten, by weight, of the litharge ; boil three hours over a gentle fire. The first coat should be thinner than the others ; experience has proven this to be the correct method of applying the paint. List of Patent Claims Issued from the United States Patent Office FOR THE WEEK ENDING MARCH 1, 1853 BEDSTEAD FASTENINGS—By Asa N. & Alden Case, of Gustavus. Ohio—We do not claim the pawl aDd ratchet, but we claim the combination of the inclined plane and head, with the pawl aDd two ratchets for the purpose of fastening bedsteads aDd tightening the cord, as specified. SWIVEL NIBBED KEYS FOB DOOR LOCKS—By A C. Ilarig, of Louisville, Ky. : lam aware that the ni1) of the key has been fitted into the tubular shank, and so secured therein by a pin fitting into a groove that the burglars instrument, when applied to the nib, would rotate it without moving the key; also ihat the key, by a plate attached to the inner lock pate, has been held so that it could not be rotated; but I claim the guard bit attached to the swivel nib in combination with the ordinary bit and shank of the key, constructed and operating as set forth. ROTARY STEAM ENGINES—By James McKay, of Philadelphia, Pa. ; I claim the passages for the exhaust steam, arranged BO that they shall cover and encircle the entiie periphery ef the stationary cylinder, and have their ingress and egress openings so arranged as to cause the exhaust steam, as it escapes, to envelope the whole surface of the cylinder, as ele-scribed. In combination with the ordinary valves and parts which form a passage for the steam, to and from the engine, I claim the supplemental exhaust parts and valves, which act ]? conjuDCtion with the ordinary exhiusfc valves, whereby a free egress for the ox-haust steam is afforded without leaving largo open passages for the steam to waste in. Also, the combination of the sliding pistons, with self-adjusting valvesandsteam-waye, whichadmita portion of the steam that propelB the piston, behiDd its inner end. to act as a spring to press it out imo the steam space, whichever way the engine may be turning. Also mountiog or hanging the two cylinders on radial and axial journals, respectively, arraoged in a common plane, and at right angles to each other, whereby the two cylinders can accommodate them selves to each other, so as to avoid binding, as set forth. MACHINE FOR MAKING AXES—By Jonas Simmons of Cohoes, N. Y. : I do not claim the employment of rolling dies f or shaping an axe ; but I claim the arrangement of the rolling dies with a rest bar to support the iron whilst being rolled, and an eye bar, arranged not only to serve as a mandrel to shape the eye of the axe, but with the rest bar to hold the iron firm during tho process ot rolling, the rest bar and eye bar being oounected with the machinery, to give them appropriate movements, to cause them to co operate with the rolls, in shaping the axe, and these parts, further in combination with a scarfing bar, for the purpose of shaping the blade to receive the steel point in order to complete the axe, substantially ae set forth. SUPPLEMENTAL VALVE IN RECIPROCATING STEAM ENGINES—Uhas. A Spring, of Kensington, Pa. : I claim the arrangement of a valve in the lid ofthe steam chest, or the equivalent thereof, between the cylinder of a steam engine and the boiler, in such manner that it will prevent the reflux of the lead steam, by dosing, whenever the pressure of the stsam in the engine excludes toat in the boiler, and opening again whenever the pressure in the boiler is greater, substantially as herein set forth. LOOMS—Wm, Townshend, of Hinsdale, Mass.: I do not claim actuating the pickers by the backward motion of the lay alone, but, first, I claim the cam wheel on the chain shaft, right angle lever, and sta pies or slide bolts combined and acting as described to bring the picking motion into operation alter nately on each side by the backward motion of the lay as specified. Second, actuating the picker staffs by the lay on its backward motion by means of the vibrating studs, when combined with levers attached to the swords of the lay, and two bent levers, arranged and combined in the manner described. Third, the two levers are connected together by the adjustable pin so as to give greater or lass motion to the selvage warp, when actuated by the cam as described. -Fourth, the apron or straps connected to the bar, and kept to the cloth by proper weight or power, so as to cause sufficient friction to wind the cloth on the cloth beam, whensaid apron and bar aremoved or actuated from the lay or otherwise, so as to produce the effects herein described. BEDSTEAD FASTENINGS—E. Sumner Taylor, of Cleveland Ohio : I do not claim separately the pawl aud ratchet, nor a continuous right and left hand screw, but, I claim the combination of the pawl and ratchet with the spiral grooved sections attached to the tenons arranged and applied in the manner and for the purpose herein specified, namely ; the tenons of one side rail and one end rail, being furnished with the plate, having the spiral groove turning to the right and left as described, making a tight joint with the post; the other side and end rails having on their tenons a groove, passing around the tenon at right angles to the axis and fitting the pins, as described, so that by having one side ofthe tenon on each end flattened to enable it to pass the pin, in order to allow it to enter the groove, when by turning in either direction, less than a comple-plete revolution, the pin fitting into the groove prevents the posts and rails from separating, and by attaching the ratchets to the end of this side rail and one end of the end rail, with the pawls attached to the posts ,as specified, by tightening of the cord put on in the manner described, the whole frame of the bedstead is held firmly together by the combined action of all the parts described, one end rail and one side rail remaining stationary, the other end rail and side rail turning as described for the purpose of tightening the cord, both being secured by the pawl and ratchet. CURRY COMBS—By Wm. Wheeler, of Troy, N. Y. : I claim the application of a ring, loop, or fixture on carry combe, for the insertion of a thumb ae a guard and rest therefor, the ring or loop being made in one piece with the back strap, as eet forth. RE-ISSUE. FOR CARS—By Nehemiah Hodge, of V ?orth. Adams, Mass. Dated Oct. 2,1849 : I am aware that the brakee of a car made with trucks or truck frames have been connected in different ways, so that the brakes of both trucks could be brought down simultaneously upon the wheels by the action of either windlass. I therefore do not claim any machinery for doiog merely this, but when this has been done the machinery applied to the windlasses and brakee of the trucks has not been such as to cause, under all, or nearly all circumstances, while the car is in operation, or running on a railway track, in which there may be curves or deflections from straight lines in the laying of its rails, and when either windlass is put in operation, the like amount of force which maybe brought to act upon the brake lever of one truck, to act (through movable rod, or connecting mechanism) upon the brakes ofthe opposite truck. I therefore claim my improvement in actuating the brakes of a car having two trucks, that is to say, a combination of four levers and three rods, asapplied to the brakes and two windlasses of the car, and operated by either of the windlasses so as to bringdown at the same time the brakes of both trucksnpon the wheels thereof with the same or practically the same degree of force, and whether when the car is running on the railway the axles of one truck or of the wheels of one truck are thrown or moved out of parallelism with those of the other truck, or the rubbers, or brakes become unequally worn, or of an unequal thickness as above stated.