Feb. 20.] THE NEW ZEALAND GAZETTE. 675

proportionate to the whole circumference and approximating to the proportion the several stampers bear in value to the stamper of highest value; a mechanical counter and indicator; a shaft for operating it; a pinion upon the shaft; and means for sliding the drum along its shaft so that a row of its teeth will gear with the pinion when the quadrant is swung to bring the stamper of corresponding value beneath the plunger: substantially as specified. (5.) In machines for stamping envelopes and the like, the combination with a pivoted swinging quadrant and a number of stampers of different value carried radially therein, of a spring-controlled plunger mounted in a vertical plane above the stampers, a drum slidably mounted on a shaft, a number of parallel rows of teeth on the drum’s periphery, counting and indicating mechanism, a shaft for operating such mechanism, a pinion secured upon such shaft and adapted to gear with any one row of teeth on the drum, a sliding sleeve loosely mounted on a shaft, an arm on such sleeve connected to the drum and a second arm thereon formed with a vertical slot therein and a rod projecting from the swinging quadrant and passing through such slot, substantially as specified. (6.) In machines for stamping letters or the like, the combination with a pivoted swinging quadrant and a number of stampers carried radially therein, of a spring-controlled plunger mounted vertically above the stampers, a main operating-shaft for conveying motion to the plunger and having a crank on one end, an inking-ribbon carried beneath the stampers, a spool mounted on each side of the machine, upon which spools the ribbon-ends are wound, a shaft for conveying rotary motion to one of such spools at a time, a ratchet-wheel secured upon such shaft, a collar loosely mounted on the shaft, pawls upon the collar engaging with the ratchet-wheel, and a connecting-rod extending between the collar and the crank on the main operating-shaft, substantially as specified. (7.) The improved machine for use in stamping and franking letters, telegrams, and the like, constructed and operating substantially as described and explained, and as illustrated in the drawings.

(Specification, 10s.; drawing, 3s.)

No. 22571.—20th March, 1907.—UNITED SHOE MACHINERY COMPANY, of Paterson, State of New Jersey, United States of America, a corporation duly organized under the laws of said State of New Jersey, carrying on business as Shoe-machinery Manufacturers at 205 Lincoln Street, Boston, Massachusetts, United States of America (the assignees of John Vinton Allen, of South Weymouth, Norfolk, Massachusetts, United States of America, Machinist). Improvements in or relating to grooving or channelling attachments for sewing or like machines.*

Claims.—(1.) In a channelling attachment for sewing-machines, the provision of means whereby the knife or blade may be thrown into or out of operation during, and without interruption of, the stitching operation. (2.) In a channelling attachment for sewing-machines which comprise a movable work-gauge or means for varying the length of stitch during each cycle of operation, or both, the provision of means whereby the channelling knife or blade is thrown into or out of operation by the same operation as effects the movement of the gauge or varies the length of stitch, or both. (3.) In a sewing-machine, in combination, a work-support, a channelling-knife arranged to cut a stitch-receiving channel in the work, and a support for the knife mounted independently of the work-support and movable parallel or approximately parallel to the work-supporting surface to project or retract the knife for the purpose described. (4.) In a sewing-machine having stitch-forming mechanism with or without feed-changing mechanism or a movable work-gauge, in combination, a slotted work-support, a channelling-knife arranged to cut a stitch-receiving channel in the work, a pivotally mounted knife-supporting arm having its free end extending into the slot in the work-support, and a slide, operatively connected with said feed-changing mechanism or with the gauge, or with both, if present, to which slide said arm is pivoted, said slide being movable, at the will of the operator, parallel with the work-engaging surface of the work-support to project the knife above or retract it below said surface for the purpose described. (5.) In a sewing-machine, in combination, a work-support, a channelling-knife formed at the end of a wire and arranged to cut a stitch-receiving channel in the work, and a support for the wire in which the wire may be rotatively or longitudinally adjusted to put the knife in position to cut properly or to a desired depth, said wire at the knife-end being arranged to engage and co-operate with the work-support. (6.) The channelling attachment for sewing-ma-

chines and its operating mechanism, substantially as described, or illustrated in Figs. 1 to 10 or in Figs. 11 to 14 of the drawings.

(Specification, 10s.; drawing, 2s.)

No. 22572.—20th March, 1907.—SIDNEY WILMOT WINSLOW, of Beverly, Massachusetts, United States of America, Manufacturer (the assignee of Andrew Wilson Rogers, of said Beverly, Manufacturer). Improvements in or relating to buffing, abrading, and like machines.*

Claims.—(1.) In a buffing or abrading machine, the combination of a plurality of inflatable rotary pneumatic devices, an air-compressor common to them, and means (such, for example, as 40) to regulate the air delivered by the compressor, whereby in relation to one of said pneumatic devices the pressure in another can be adjustably regulated or can be shut off. (2.) A machine of the kind described in claiming clause No. 1, in which one of the pneumatic devices can be kept fully supplied with air while the pressure in another is being increased or diminished. (3.) In a buffing or abrading machine, the air supplying and regulating means substantially as described, and illustrated in the drawings.

(Specification, 8s.; drawing, 2s.)

No. 22602.—27th March, 1907.—HENRY ELI WHITE, of Dundas Street, Christchurch, Canterbury, New Zealand, Contractor. Improved concrete-mixing machine.*

Claims.—(1.) In a concrete-mixing machine, a drum formed of two conjoined truncated cones having flat sides, substantially as set forth. (2.) In a drum of the class described in claim 1, the employment of two doors kept closed by spring fastenings, and so disposed that while one door is in position to receive sand and cement the other is in position to receive shingle, substantially as set forth. (3.) In a concrete-mixing machine, the combination with a drum constructed as described in claim 1, of an elevator for raising shingle, and a hopper having a shute to receive the material from the elevator and direct the said material into the drum, substantially as set forth. (4.) In a concrete-mixing machine, the employment of a water-service cistern fitted with a ball cock for delivering predetermined quantities of water to a drum, substantially as set forth. (5.) The combination with a drum for mixing concrete, of a hollow shaft provided with perforations, substantially as set forth. (6.) The combination and arrangement of parts comprising the improved mixing-machine, substantially as and for the purposes set forth, and illustrated on the drawings.

(Specification, 3s. 9d.; drawing, 2s.)

No. 22661.—10th April, 1907.—UNITED SHOE MACHINERY COMPANY, of Paterson, State of New Jersey, United States of America, a corporation duly organized under the laws of said State of New Jersey, carrying on business as Shoe-machinery Manufacturers at 205 Lincoln Street, Boston, Massachusetts, United States of America (the assignees of Frederick Henry Perry, of Beverly, Essex, Massachusetts, Inventor). An improved construction of wire for the manufacture of metallic fasteners.*

Claims.—(1.) In a fastener or in fastener wire, the combination of either an uninterrupted helical rib having smooth side-faces that produced intersect at an angle the surface of the core, or a plurality of such ribs and an interrupted face on the core between the turns of the rib or ribs. (2.) As a new article of manufacture, a screw wire having a series of depressions formed in that portion of its surface which is between the ribs forming the threads, each of said depressions having a nib or raised portion which projects from its surface. (3.) A construction according to preceding claiming clause No. 2, characterized by a nib or raised portion of a height substantially equal to the depth of the depressions. (4.) A screw-threaded fastener device having the surface of the spaces between the threads provided with a series of depressions, the marginal portion of said depressions forming for the purpose described obtuse angles with the surface of said space. (5.) The screw-threaded fastener substantially as described, and illustrated in Fig. 2, or Fig. 5, or Fig. 6 of the drawings.

(Specification, 5s. 6d.; drawing, 1s.)