the action of the slide valve of the auxiliary engine, by the aid of the tappets, the vibrating piece, (trip lever) the sliding (wedge) piece, and their appendages, as set forth; I claim the so regulating of this action, whether the apparatus be constructed precisely in the form represented, or in any other in which a like effect is produced, by means substantially the same."

35. For an improvement in the mode of Setting Logs on the Carriage of a Saw-Mill; Waterman B. Palmer, Brookfield, Madison county, New York, July 24.

For the general principle of the mode of setting logs, described in the specification of this patent, the reader is referred to the notice given of a patent granted to Henry Stanton, on the 16th of this month, (July,) number 26 of this list, the present patent having been granted for a combination and arrangement of parts for operating the long shaft that forms the connexion between the slides on the head and tail blocks. The claim refers to and is wholly dependent on the drawings, and therefore we are under the necessity of omitting it.

36. For an improvement in the Paddle-Wheels of Steamboats, &c.; Richard D. Chatterton, Derby, Great Britain, July 24: to run fourteen years from the 11th of January, 1842, the date of the British patent.

This is for an alleged improvement on that kind of side paddle wheels in which the paddles, or floats, are placed at an angle with the shaft, as fully explained in the following

Claim. "I declare that what I claim as of my invention in paddle wheels of steamboats, and all other vessels, machines, or bodies which are propelled, or moved, by the action of floats, or other like contrivances, in and against water, in oblique positions relatively to the shafts, or axes, and in series of pairs in oblique directions the reverse of one another; is the placing of the inner extremity of each of the individual paddles, or floats, so as to project beyond the inner termination of the one opposite thereto, and said inner extremities being at such distances from each other as to admit of the passage of water between them. I do not claim the use of pairs of floats, or paddles, inclined towards each other, when such pairs meet and form an angular point, this having been often done; but I limit my claim to the particular arrangement of such pairs of floats, or paddles, as herein set forth, but without confining myself to the precise angles, or relative distances at which the floats are represented to be fixed, and reserving to myself a right to place them at any more suitable angles, or distances, by which the like beneficial results may be ob

tained."

37. For an improvement in the Bolter for Flouring Mills; Ryburn Buchanan, Sullivan county, Tennessee, July 24.

Claim. "What I claim as my invention, is the combination with

the bolting reel of the long, vibrating, re-acting knocker, or knockers, suspended within the reel, and acting, when in operation, upon the arms of the same from one side to the other of the same, and reacting when revolved to the opposite side, so as to keep the bolting cloth clear of dust, as described, without injury to the cloth, and preventing its slipping on the ribs of the bolter."

38. For improvements in machinery for making Wrought-Iron Spikes, or Nails; S. G. Reynolds, of Bristol, Rhode Island, now residing in Cecil street, Strand, Westminster, England, July 26. The claims under this patent refer throughout to, and are wholly dependent upon, the drawings, which are very numerous, and we are, therefore, under the necessity of omitting them.

The nails, or spikes, are made in this machine by cutting from a plate, instead of a rod, as heretofore; the piece after being cut off from the plate, is griped and held against the die, by which it was severed from the plate, which becomes the bed against which it is rolled into the required form by a roller. After the operations of cutting and rolling, the head is struck, and the point formed by appropriate dies.

39. For a machine for Trimming the Blanks in the manufacture of Butt Hinges; Cyrus Kenney, Troy, Renssalaer county, New York, July 26.

"The butt hinges that are to be manufactured by the aid of my machine, are such as are formed from wrought-iron, or other malleable metal. In the manufacture of such hinges the flaps, or halves, of the hinge are first cut out of rolled, or sheet, metal, with the pieces projecting from one side thereof, which, when bent, are to form the knuckles of the hinges, this cutting being effected in a manner well known. In the process of bending the knuckles formed from the projecting pieces, these become elongated, so that the two sides, or halves, of the hinge will not come together until reduced to the width they had before being bent. The machine covered by this is intended to remove this difficulty by cutting, or trimming, off a small portion from the sides of the projecting pieces, before they are bent, and made into knuckles." For this purpose there are gauges that fit between the projecting pieces before being trimmed, attached to the under part of the trimming cutters, or dies, operated by a lever, and acting against bed dies which aid in shearing off the surplus metal. The dies and gauges are regulated by set screws.

Claim. "What I claim is the manner of arranging and combining the dies and gauges substantially as described and set forth in the specification."

40. For improvements in machinery for making Barrels, Firkins, Se.; Horace Baker, McLean, Tompkins county, N. York, July 30. After the staves have been shaved in the usual way, they are

bed in a curved bed attached to a swinging frame, the centre of tion of which corresponds with the centre of the barrel, and by is of this swinging frame they are presented, first, to a circular which cuts off the surplus wood, and then to a straight reciprog jointer. After this operation all the staves for a barrel are put her between two circular plates, on a lathe, with teeth for holding firmly, and then turned off by means of cutters attached to a : which slides transversely on a carriage that moves from end to on ways; the stock being so arranged as to embrace a guide of rve corresponding with the bilge of the barrel.

aim.-"What I claim is the employment of the swing frame coneted and arranged as described, in combination with the edging jointing machines, in the manner and for the purpose specified. so claim the method of holding the staves for turning, in combinawith the movable, double-motion, cutter carriage, arranged and structed as before specified."

For an improvement in the Silk Reel for Reeling Silk; James . Harris, Poultney, Rutland county, Vermont, July 30. To prevent any injury to the silk upon the reel by undue tension, 1 to facilitate the removal of the silk from the reel," one arm is mected with the hub by a spring and slide.

Claim. "What I claim is the spring graduated by the screw, in mbination with the sliding arm of the reel, constructed and operatg as described."

2. For an improvement in the manner of Constructing large Wrought-Iron Cannon; Richard F. Loper, Philadelphia, Pennsylvania, July 30.

Claim. "I am aware that it has been proposed to make large guns Istaves and hoops, but not like those constructed by me. I do not, erefore, claim simply making guns of hoops, or rings, and staves, ut what I do claim as my invention, and desire to secure by letters atent, is making guns by uniting the rings of each layer by screwing em into each other, and also by screwing other layers, or tiers, on o the first, second, third, and so on to any extent, as described."

3. For improvements in Fire Arms; Edward Savage, and Simeon North, Middletown, Middlesex county, Connecticut, July 30. This is for an alleged improvement in the mode of constructing guns, &c., that load at the breech, by making the breech part of the carrel separate and movable, the back part of this section turning on joint pin in a socket, that the forward part may be thrown up suficiently to receive the charge, and consists in a mode of insuring the Coincidence of the movable section with the permanent part of the barrel, after being charged, and an arrangement of parts for giving the requisite movements.

On each side of the movable section there is a strap, one of which is cut out to receive a shoulder, (called in the VOL. IX, 3RD SERIES-No. 3—MARCH, 1845.

16

specification a permanent chock,) on the side of the movable section, and the other adapted to receive the joint pin, or spindle, of a tumbler that embraces a circular projection on the other side of the movable breech, so that by the turning of this tumbler it is thrown up, or down; the spindle of the tumbler being provided with a hand lever, one end of which is cam-formed, and acted upon by a spring, to insure the complete movement of the parts.

Claim. "What we claim is the combination of the tumbler chock with the receiver, (breech) in the manner and for the purpose set forth. We also claim, in combination therewith, the permanent chock, constructed and arranged as set forth. We also claim the lever and spring, in combination with the tumbler, chock, and receiver, arranged substantially in the manner and for the purpose described." 44. For a Rotary Printing Press; Richard M. Hoe, New York City, July 30.

We make the following extract from the specification, viz.,-"The distinguishing feature of this press, is its being provided with a number of cylinders, say from two to six, or eight, or more, each of which is to receive a sheet of paper that is to be carried by it to the form of types to receive an impression. The whole of these cylinders are to be carried round, by the continuous motion, in one direction, of an axis which is their common centre of motion; or the cylinders may be attached to one or two chains, or bands, in a manner similar to that of the inking rollers, the form of type remaining at rest during the whole operation, so that the reciprocating action of the platen, or bed, or any other part having considerable momentum, is avoided." The journals of the cylinders are so arranged and connected with this common central axis as to slide towards and from it, and have a horizontal movement in passing over the form of type, and give the required impression. The practical application of this general principle, with the adaptation of all the details necessary to the operation of printing, is fully described and represented in the specification and drawings, and claim is made to the general character stated above, and to many of the details, but as the claim refers to the drawings, the publication of which would carry us beyond the limits of this work, we are under the necessity of omitting them; the reader will, however, from the above, be able to form a pretty clear notion of this novel and ingenious device.

Improvements added to existing Letters Patent during the month of July, 1844.

1. For improvements in Boxes for Railroad Carriages; John H. Tims, Newark, New Jersey, July 1.

This is for an improvement added to letters patent granted to Mr. Tims on the 31st of October, 1839, and noticed in 2d series of this Journal, vol. xxvi, page 394, to which the reader is referred.

Claim. "What I claim is the employment of two caps, or washers,

provided with packing between them, in combination with the grooved ring, by which arrangement the dust is effectually kept out of the oil box, and the oil kept in, as described, and this I claim as an improvement on the method employed by me heretofore, and secured to me by letters patent, and consisting of a single washer and grooves on the axle."

Patents for Designs which issued in the month of July, 1844, under the third section of the Act of August 29, 1842. For Ornaments to be cast, or stamped, upon iron, or other plates, used in the construction of Stoves; Amaziah Whitney, Albany, New York, July 19.

MECHANICS, PHYSICS, AND CHEMISTRY.

Notice of the Manufacture of Glass in Bohemia. By M. L. P. DEBETTE. [Annales des Mines, 4th series, volume iv, page 553; December, 1843.]

TRANSLATED FOR THE JOURNAL OF THE FRANKLIN INSTITUTE.

(Continued from Page 122.)

CHAPTER IV.-Manufacture of Table Glass and Fine Glass.

As soon as the glass of the preceding casting has been worked up, each crucible is charged with about 154 lbs. of materials previously fritted, taking care to put the arsenic first, at the bottom of the crucible. This mixture varies, in a very notable degree, in different establishments, as may be seen from the following table:

(1) White table glass, first quality, from Schwarzthal, a little white arsenic, and a very little peroxide of manganese are added. (2) White table glass, from Neuwelt, (M. Perdonnet,) a small quantity of nitre, oxide of manganese, and white arsenic are added. (3) Very white table glass (M. Penhok.)

(4) Common table glass (M. Hermbstädt.)