1300 THE COLLIERY GUARDIAN June 13, 1913. disc. Fig. 1 is a sectional elevation of a portion of a frame, cutter disc and associated parts. Fig. 2 is a sectional plan of a pump. Fig. 3 is a plan with a cap removed, drawn on a smaller scale, of the construction shown at fig. 1. In use, a charge of lubricant is introduced into the circular recess G and the cap G1 applied, and as the cutter disc B rotates, the cam L operates the plunger Ml of the pump, and a practically constant flow of lubricant is forced to the .o — o __o bearings in addition to that which gravitates thereto. In the construction illustrated, the inlet N1 of the pump is •disposed in a region where oil tends to accumulate under the influence of contrifugal force due to the rotation of the parts, and consequently enters the pump barrel N at a slight pressure. Disc K, which practically constitutes the base of the oil reservoir, rotates when the cutter disc B is operated. (Eight claims.) 19508 (1912). Improvements in or Relating to Rock Drills, G. H. Gilman, of 17, Bond-street, Claremont, Sullivan County, New Hampshire, U.S.A.—Relates to rock drills of the kind operated by a piston working in a cylinder and actuated by fluid pressure. The invention has for its object to provide a drill of this kind with improved means for supplying and regulating the supply of the mixed pressure ffiuid and water or the like to the drill bit or tool. One end of the water supply tube is caused to co-operate with the reciprocation of the drill-actuating piston to act as a valvQ ■for intermittently opening the fluid supply passage in the drill bit or tool to the live or exhaust pressure fluid of the drill actuating cylinder. In the accompanying drawing a longitudinal section of a common type of rock drilling machine is shown, having one form of the invention applied thereto. By proper adjustment of the water tube, the pressure-fluid supply through the drill bit may be regulated to suit the conditions of the work on which the tool is operated, it being possible to secure the delivery from the drill bit of water alone, water and exhaust pressure fluid •or water and live pressure fluid. If desired the supply of water might be wholly cut off and the tool used with pressure fluid alone in the known manner, the water being introduced independently into the hole. (Six claims.) 20226 (1912). Miner's Pick Head. J. Johnson, 12, War sop-vale, Mansfield, Notts, and G. Morris, 116, Lang- with-road, Shirebrook, Derbyshire. The invention is of the class of pick heads made of cast steel or like suitable metal, and formed with an eye for'receiving a handle or shaft, the said handle having a collar of cast steel or like suitable metal, around which the eye of the head fits tightly when in position, but from which it can be readily removed by the user and afresh head put on as required. In this invention the eye of the pick head is so shaped that it fits tightly around the collar of the shaft when put on with either of its edges upwards, so that the head after being used and detached can be turned over and reattached for use before being replaced by a fresh one. In virtue of the shape of the eye together with the uniform taper of the sides of the pick head from the ends of the eye to the points, the pick head can be used with either edge upwards as required, and may be taken off the shaft after being used with one edge upwards, turned over, put on again and used with the other edge upwards before being replaced by a fresh one, the said turning over or reversing being the object which this invention is designed to attain. (One claim.) 20445 (1912). Improved Device for use in Blasting Coal, Rock or the like. J. Lamour, of Riegelsberg, Saarbrucken, Rhineland, Germany.—Consists in a powerfully-built casing adapted to resist the force of the blasting explosion except at one place in its side, where there is an opening closed watertight by a plate called a pressure member. This casing fits the borehole, so that when in position the pres- sure member is in contact with or very close to the lateral surface of the bore. When now the casing is filled with 1 water and closed by a cover, and a blasting cartridge is exploded in it at a place removed from the said opening, the explosion pressure is transferred by the water to the pressure member, and therefore to the rock or coal. There is no substantial ejection of water from the casing until the rock or coal has been shattered, so that there is sufficient time for the quenching of the hot products of explosion before they follow the water expelled. No tamping or other means for keeping the casing in the borehole is required. In the accompanying drawing the device is shown in longitudinal section. (Two claims.) 22867 (1912). Improvements in or connected with Safety Couplings for Colliery Trams and Similar Wagons. J. C. Alford, of Weghor Copper Works, Under Bridge, Oakwood, near Port Talbot, L. T. W. Rees, of 2, Gladys-street, Aberavon, and D. J. Jones, of Brynlluest, Gwarycaeau, Port Talbot.—Consists in constructing one of the hooked members of the device to form an integral part of a fixed or longi- tudinally slidable drawbar, and in hinging or jointing thereto the other and oppositely-disposed hooked member by a hinge, the axes of which is parallel to the face of the integral hooked member, so that the drawbar itself will take the load on the coupling, and such load will not be borne by the other hooked member hinged thereto, which is intended to serve only as a lock. In the second place, the invention consists in constructing the openings of the oppositely-disposed hooks of the shape shown in the HlUu- .'Wi a drawings to facilitate coupling and uncoupling. Fig. 1 is a view in perspective of the improved coupling shown in the open position; fig. 2 is a side elevation thereof when closed. (Two claims.) 24687 (1912). Reducing Valve for Diving Equipments. Maschinenfabrik "Westfalia” Aktien - Gesellschaft, Gel- senkirchen, Westphalia, Germany. — Consists of a new or improved reducing valve for use with diving equip- ments of the kind wherein the compressed gas for supporting the respiration of the wearer is delivered from a steel vessel through a reducing valve. The necessary instan- taneous and automatic regulation of the air supply is attained by employing a reducing valve provided with holes in the cover of the diaphragm casing so that the external water pressure acts directly on the diaphragm in proportion to the depth of immersion and thereby increases the air delivery immediately and directly as the depth increases. The accompanying drawing illustrates in mid section a reducing valve constructed in accordance with the invention. (One claim.) 28149 (1912). Improvements in or relating to Respiratory Apparatus. J. H. Thorne, of the Rhondda Rescue Station, Dinas, Glamorgan, and H. C. Jenkins, of 240, Carter Knowle- road, Sheffield, Yorkshire.—Relates to an improvement in or modification of the invention described in former specifi- cation No. 7832, dated April 1, 1912, wherein the cartridge is formed in two parts, either separate or hinged, each part being provided with curved horizontal trays, which, when the two parts of the cartridge are brought together, interlie one with another. Fig. 1 is a front view of the improved cartridge; fig. 2 is an end view; and fig. 3 is a plan of the same. Fig. 4 is a front view of the cuirass or case con- taining the cartridge; fig. 5 is a section of the same on the line A.B. fig. 4. In the present invention the cartridge a, instead of being made in two parts, is constructed of a con- tinuous piece of gauze of non-corrosive substance which ie formed into a number of horizontal folds, leaving open spaces alternately at the front and the back, the spaces c between the folds on the front side being wider than those d on the opposite side. In the divisions forming the deeper spaces c is placed the regenerative substance, such as caustic potash, caustic soda or the like in granular form, the divisions forming the shallow spaces d being open for the circulation of the air. This folded gauze cartridge is threaded on three or four vertical rods e, which, after being passed through each fold, are provided with ferrules f which form distance pieces between each of the folds, and the ends of the cartridge are secured to perforated plates g. At opposite ends, alternately, of the divisions in which the regenerative substance is placed are fixed transverse baffles h. The cuirass or case b is also of curved form, and is constructed d c- c c c- IIBll o o “IT ---it- j e r/^.3 * £ —— - ’Jmr- MF >r -ft - Hl Hi- r - -H- with a removable cover b1 faced on its inner side with rubber b2 or other suitable material. In the bottom of the case is provided an air space or jacket i with an inlet j in the centre for the admission of foul air, and near one end of the case is an opening k in the upper wall of the jacket i through which the foul air passes into the case. Near the top of the case, at the opposite end to the inlet, is provided an outlet I for the purified air. (One claim.) HEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. 12751. Generator in suction gas plant. J. Maude. 12764. Means for automatically controlling and regulating winding engines or the like. Butterley Company Limited and C. E. Drabble. 12781. Bricks and the like. T. Priestnail. 12819. Trucks. H. E. Meacham and W. J. Perkins. 12832. Buffer coupling apparatus. R. T. Glasco dine. 12833. Process for the utilisation of exhausted gas-puri- fying materials. C. J. H. Madsen. 12838. Packing devices for centrifugal pumps, compressors and the like. British Thomson-Houston Company Limited and R. H. Collingham. 12864. Railway goods wagons. T. Flint and H. Beckwith. 12880. Treatment of tar, tar distillates and their products. I. McDougall, S. McDougall and F. Howies. 12902. Self-adjusting feed for rock or coal hand-drilling machines. J. E. Brown. 12912. Turbines, rotary pumps and the like. E. L. Cart- wright. 12913. Apparatus for washing coal. Clifton and Kersley Coal Company Limited, H. V. Hart-Davis and J. Greenhalgh. 12915. Separating or grading apparatus. T. F. Wilkinson and H. T. Wilkinson. 12928. Elevating and hauling belt. J. Parker. 12933. Processes for recovering tin from tin ores, tailing and other tin-bearing substances, applicable also to other metals. H. Dixon. 12952. Furnaces and the like. C. D. McCourt. 12960. Manufacture of iron and other metals. A. E. Bourcoud. 12961. Manufacture of steel. G. J. Boyle, Viscount Chetwynd. 19968. Wood refuse suction gas producer. H. Dormand. 12976. Apparatus for drawing and charging gas retorts. H. Bird and G. Hayter. Continued on page 1302.