APRIL 6.] THE NEW ZEALAND GAZETTE. 873

The block carrying the cylinder and ports which are connected to duplex valves by which the fluid passing through same may be controlled or regulated.

[NOTE.—The above extract from the specification is inserted in place of the claims.]

(Specification, 8s. 6d.; drawing, 2s.)

No. 19174.—7th March, 1905.—JAMES MCGINNESS and JAMES PATRICK MCGINNESS, of “River View,” Framlingham, Victoria, Australia, Dairymen. Improvements in and relating to teat-cups.

Claims.—(1.) In combination, a teat-cup and means for the production of sterilised, pneumatic, or equivalent fluid as set forth. (2.) In combination, a teat-cup, means for producing vacuum or fluid pressure pulsations within said teat-cup, and means for the sterilisation of the pulsating fluid as set forth. (3.) A teat-cup constructed to resist external pressure, and having a prescribed area constructed to respond to pulsations produced within the cup. (4.) A teat-cup constructed to resist external pressure, and having an area on opposite sides constructed to respond to pulsations produced within the cup. (5.) A teat-cup having fluid-inlet united to the wall of the cup. (6.) In a teat-cup, constructing the cup and fluid-inlet in substantially one piece. (7.) A teat-cup having the lower portion formed parabolically or approximating thereto. (8.) In combination with a teat-cup a cap provided with a serrated inlet for a teat. (9.) In combination with a teat-cup constructed to resist external pressure, and having a prescribed area or areas constructed to respond to pulsations produced within the cup of a flexible cap provided with a serrated inlet for a teat, and held in position on the cup by its own elasticity. (10.) In combination, a teat-cup and means for the production of sterilised fluid, said means including a containing-vessel, a cover, a pneumatic or equivalent fluid-inlet, a perforated duct, a series of perforated plates, a filtering medium, and a sterilising agent, as set forth. (11.) In combination with a teat-cup, the sterilising apparatus as described and illustrated. (12.) The improved teat-cup as described and illustrated in Fig. 1. (13.) The improved teat-cup as described and illustrated in Figs. 3 and 4. (14.) The combination with either of the cups as described and illustrated in Figs. 3 and 4, with the sterilising apparatus as described and illustrated in Fig. 1.

(Specification, 3s. 3d.; drawing, 1s.)

No. 19176.—7th March, 1905.—PAUL BÉVENOT, of 7, Rue Laffitte, Paris, France, Engineer, and EDWARD DE NÈVEU, of 42, Avenue Chevreul, Asnières, Seine, France, Landlord. Process for desiccation and preservation of milk.

Claims.—A process for the desiccation and preservation of milk consisting essentially: (1.) In effecting the desiccation at the temperature of pasteurisation and preferably between 85° and 95°. (2.) In effecting this desiccation by atomisation under pressure in order to homogenise the milk and divide the same into very tenuous particles, each of which contains all the constitutive elements of milk and produces a solid particle containing all these elements. (3.) Of desiccating the atomized milk by means of a hot-air current in a determined quantity and previously heated within the indicated limits of temperature.

(Specification, 4s. 9d.; drawing, 1s.)

No. 19177.—7th March, 1905.—FRANÇOIS FERNAND BOURDIL, of 56, Avenue d’Téna, Paris, France, Engineer. Improvements in microphones.

Claims.—(1.) An improved microphone, the active parts of which are immersed in a liquid medium of sufficient insulating power in order to prevent the production of sparks and allow the use of electrical currents of higher intensity and tension, substantially as described. (2.) In an improved microphone as above described, the use of oils such as petroleum oil, glycerine, and the like as a liquid medium of sufficient insulating power in order to prevent the production of sparks and allow the use of electrical currents of higher intensity and tension, substantially as described. (3.) In an improved microphone as above described, the combination of a vibratory diaphragm, a receptacle containing the active parts of the microphone, and an insulating liquid medium, substantially as described.

(Specification, 2s. 9d.; drawing, 1s.)

No. 19179.—7th March, 1905.—ROBERT TEMPLE, of Fourteenth and Blake Streets, Denver, Colorado, United States of America, Engineer. Improvements in pneumatically actuated tools.

Extract from Specification.—In the art to which this invention relates, it is well known that in the use of a rock-drill, for instance, the drill is shoved forward under tremendous pressure, and has to go forward a predetermined distance before it can be retracted, so that when operating certain kinds of rock the engine will sometimes give out a short blow and refuse to move backward. This invention, therefore, is intended primarily to be an improvement on that type of engine, in that instead of using the compressed air and exhausting it by the usual method, air under pressure is maintained in the system and pulsed so as to reciprocate the tool-piston with its tool in any desired manner, such piston with its tool being adapted to be moved backward and forward at any position of its stroke.

[NOTE.—The above extract from the specification is inserted in place of the claims.]

(Specification, 12s.; drawing, 1s.)

No. 19180.—7th March, 1905.—ROBERT TEMPLE, of Fourteenth and Blake Streets, Denver, Colorado, United States of America, Engineer. Improvements in pneumatically actuated tools.

Extract from Specification.—In constructing a tool in accordance with these improvements, and describing first the reciprocating tool parts, the tool-cylinder a is provided, having a passage b leading from one end of the cylinder to the other. This passage is provided with a rotary controlling-valve c, adapted to be opened or closed, as will more fully hereinafter appear. A tool-piston d is provided and reciprocatingly mounted within the tool-cylinder, having a piston-rod e, which is secured to the tool-piston. This piston-rod is adapted to hold or operate any desired operating-tool, such as a hammer, chisel, riveting or cutting tool. To reciprocate the tool-piston a single-acting pulsating-engine is provided, formed of an engine-cylinder f, and a trunk-piston g reciprocatingly mounted therein. This single-acting pulsating engine-cylinder is connected by means of a single flexible pipe h, with a passage b in the tool-cylinder. When the parts are constructed and arranged as shown in the drawings, the pulsations of the piston g will force air into both ends of the tool-cylinder when the passage b is opened to the chamber l at the rear of the tool-piston. In operation, however, the controlling-valve in said plunger is closed after both ends of the cylinder have been charged, so that the pulsations of air pass into the chamber 2 of the tool-cylinder below the tool-piston only, moving it upwardly and further compressing the air in chamber 1 above the same. During the backward or downward movement of the pulsating-piston a reduction in pressure is formed in the pulsating engine-cylinder, so that the air below the tool-piston rushes back therein to equalise the pressure between the two cylinders. At the same time the superior pressure which has been confined in chamber 1 above the tool-piston acts to drive the tool-piston forward at a rapid pace to act upon the desired tool. In order to pulsate the piston g in the desired manner—that is, to move it upwardly slowly so as to give time for the pulsations of the air and permit it to enter below the tool-piston as above described, and to reciprocate said pulsating-piston in a rapid manner, a main driving crank-shaft i is provided and connected with the said pulsating trunk-piston g by means of a compound connecting-rod formed in two parts, j and k, one part of which is pivotally secured to the wrist-pin l of the crank-shaft, and the other to the trunk-piston, as shown in the drawings. Ordinarily, if but a single connecting-rod were employed, both movements of the trunk-piston would occupy equal periods of time. As above suggested, however, it is desirable that the trunk-piston should be retracted in a shorter period of time than is occupied by raising or pushing it forward. In order to accomplish this, a controlling-link m is provided and pivotally and adjustably secured to the frame of the machine at n by means of the slotted bracket p. This controlling-link is also pivotally secured at q to the common fulcrum-point of the compound connecting-levers. The crank-shaft rotates in the direction indicated by the arrow, and it will be seen as the common fulcrum-point passes the line of centres between the wrist-pin, crank-shaft, and pivotal connection of the trunk-piston it is depressed quite rapidly, but as it starts to raise the trunk-piston such raising movement is accomplished slowly, or, in other words, occupies a longer period of time than the depressing of said trunk-piston. To furnish a supply of compressed air this frame portion is provided with a reservoir r, and connected by means of a pipe s with the chamber t of the pulsating engine-cylinder. This pipe is further provided with a check-valve u, of the usual construction, to prevent the return of compressed air to the