Feb. 21.] THE NEW ZEALAND GAZETTE. 511

tight, a switch contained within the case, the operating-spindle thereof passing through the side of the said case, means for detachably connecting the said end of the switch-spindle to the mechanically operated spindle within the box, and means for connecting the electric terminals of the switch located within the switch-case to the electric connections within the box, as set forth. (3.) In a switch-box for electric traction, to enclose an electric switch worked by mechanical means, the combination with an outer box, mechanism therein to mechanically operate a switch-shaft, a removable cover to the box and a seating within the box, of a case formed with an open base, and containing an electric switch, a switch-spindle for operating same projecting through a watertight bearing in the side of the case, the said case being placed within the box, and means for holding the lower edges of the open base of the case upon the seating in the box to render the case watertight, means for detachably connecting the switch-spindle to the operating mechanism within the outer box, and means for detachably connecting the electric terminals of the switch within the switch-case to electric connections covered by the switch-case, substantially as set forth. (4.) In a switch-box for electric traction, to enclose an electric switch worked by mechanical means, the combination with an outer box, a removable cover to the box, a spindle carried on bearings within the box, and mechanical means for operating the spindle, a removable case to be placed inside the box, a switch contained within the case, an operating-spindle from the switch extending through the said case, means for effecting the electrical connection of the switch and conductor-terminals upon the insertion of the switch-case within the box, and means for rendering the said switch-case watertight when fixed in position within the box, of means for adjusting and securing the switch-case within the box to bring the axes of the switch-spindle and the operating-spindle as nearly coincident as possible, and a detachable coupling of universal-joint character between the ends of the switch-spindle and the operating-spindle, substantially as set forth. (5.) In a switch-box for electric traction, to enclose an electric switch, worked by mechanical means, the combination with an outer box, a removable cover to the box, and mechanism in the box to mechanically operate a switch-spindle, a case to be placed inside the box, through the cover-aperture thereof, a switch contained within the case, a spindle projecting through the case for operating the switch, and a detachable connection between the projecting switch-spindle and the operating-mechanism in the outer box, of an opening in the base of the switch-case, means for making a watertight joint between the edges of the said opening, and a seating in the box, switch-terminals with downwardly extending spring sockets, carried within the open base of the switch-case, and electric connections in the box terminating in upstanding parts adapted to enter the spring sockets forming switch-terminals carried by the switch-case when the latter is placed in position, and thereby effect electrical connection, substantially as set forth. (6.) In a switch-box for electric traction, to enclose an electric switch worked by mechanical means, the combination with an outer box, a removable cover to the box, and a mechanically operated shaft in the box to work a switch-spindle, a case to be placed inside the box-aperture, a switch contained within the case, a spindle from the switch projecting through the case, an opening in the base of the switch-case, means for making a watertight joint between the edges of the said opening of the case and a seating in the outer box, and electrical connections to the switch, of a universal-joint connection between the ends of the mechanically operated shaft in the outer box and the projecting end of the switch-spindle, consisting of a disc on the end of the switch-spindle, a projecting rib on the face of the disc, a similar disc and rib on the end of the operating-shaft, and an intermediate loose disc located between the two ribbed discs aforesaid, and having a groove upon each face, the said grooves extending at right angles to each other and receiving the ribs of the discs, whereby rotary motion can be communicated from the shaft to the switch-spindle even when not perfectly aligned, and the coupling can be connected and detached by the act of inserting or withdrawing the inner case, as set forth. (7.) In a switch-box for electric traction, to enclose an electric switch worked by mechanical means, the combination with an outer box, a removable cover to the box, a case to be placed in the interior of the box, a switch contained within the case, a spindle projecting through the case for operating the switch, and means for rendering the case watertight when inserted in the outer box, of mechanism mounted within the box, arranged at the sides of the case to mechanically operate the switch-spindle, a detachable connection between the projecting switch-spindle and the operating-mechanism in the outer box, the said operating-mechanism being capable of ready removal from the outer box after the removal of the switch-case, as set forth.

(Specification, 9s. ; drawings, 1s.)

No. 13294.—4th January, 1901.—ROBERT WOOLLEY GIBBS, of Nile Street, Nelson, New Zealand, Poultry-farmer. A new window-sash hanger.

Claim.—A grooved bar of iron, brass, or other suitable material for the purpose, fitted into the frames of house-windows, carriages and other vehicles, and a steel spring fitted to the sides of window-sash acting in concert with the grooved bar, for the purpose and in the manner described.

(Specification, 1s. 6d. ; drawings, 1s.)

No. 13301.—7th January, 1901.—THE BETHLEHEM STEEL COMPANY, a corporation organized and existing under the laws of the State of Pennsylvania, having its principal place of business at South Bethlehem, Pennsylvania, United States of America (assignees of Frederick Winslow Taylor, of Third and Seneca Streets, South Bethlehem aforesaid, Engineer, and Maunsel White, of the Eagle Hotel, Bethlehem, Pennsylvania aforesaid, Engineer). Metal-cutting tool, and method of making and treating the same.

Claims.—(1.) A metal-cutting tool formed of air hardening tool steel, containing not less than one-half of 1 per cent. of chromium and not less than 1 per cent. of tungsten or molybdenum, or of a mixture of these substances, said tool, or its cutting-portion, being heated prior to use to a temperature of not less than 1,725° Fahr., in order to make it capable of efficient use at high temperatures. (2.) A metal-cutting tool formed of air hardening tool steel, containing not less than 1 per cent. of chromium and not less than 4 per cent. of tungsten, or its equivalent as specified, said tool, or its cutting-portion, being heated prior to use to a temperature of not less than 1,725° Fahr., in order to make it capable of efficient use at high temperatures. (3.) A metal-cutting tool formed of air hardening tool steel, containing not less than 3 per cent. of chromium and not less than 6 per cent. of tungsten, or its equivalent as specified, said tool, or its cutting-portion, being heated prior to use to a temperature of not less than 1,725° Fahr., in order to make it capable of efficient use at high temperatures. (4.) The method of producing a metal-cutting tool adapted to retain its efficiency at high temperatures which consists in forming the tool of air hardening tool steel, containing not less than one-half of 1 per cent. of chromium and not less than 1 per cent. of tungsten or molybdenum, or of a mixture of these substances, and heating it, or its cutting-portion, to a temperature of or over 1,725° Fahr. (5.) The method of producing a metal-cutting tool adapted to retain its efficiency at high temperatures which consists in forming the tool of air hardening tool steel containing not less than one-half of 1 per cent. of chromium and not less than 1 per cent. of tungsten or molybdenum, or of a mixture of these substances, and heating it, or its cutting-portion, to a temperature of or over 1,850° Fahr. (6.) The method of producing a metal-cutting tool adapted to retain its efficiency at high temperatures which consists in forming the tool of air hardening tool steel containing not less than one-half of 1 per cent. of chromium and not less than 1 per cent. of tungsten or molybdenum, or of a mixture of these substances, heating it, or its cutting-portion, to a temperature of or over 1,725° Fahr., then cooling the tool rapidly to a temperature below 1,550° Fahr. (7.) The method of producing a metal-cutting tool adapted to retain its efficiency at high temperatures which consists in forming the tool of air hardening tool steel containing not less than one-half of 1 per cent. of chromium and not less than 1 per cent. of tungsten or molybdenum, or of a mixture of these substances, heating it, or its cutting-portion, to a temperature of or over 1,725° Fahr., then cooling the tool, and then reheating it to a temperature above 450° Fahr. and below 1,350° Fahr. (8.) The method of producing a metal-cutting tool adapted to retain its efficiency at high temperatures which consists in forming the tool of air hardening tool steel containing not less than one-half of 1 per cent. of chromium and not less than 1 per cent. of tungsten or molybdenum, or of a mixture of these substances, heating it, or its cutting-portion, to a temperature of or over 1,725° Fahr., then cooling the tool to a temperature of not over 1,240° Fahr., and afterwards maintaining the tool at temperatures between 1,240° Fahr. and 450° Fahr. for several minutes. (10.) The method of producing a metal-cutting tool adapted to retain its efficiency at high temperatures which consists in forming the tool of air hardening tool steel containing not less than one-half of 1 per cent. of chromium and not less than 1 per cent. of tungsten or molyb-