PATENTS SUMMARIZED.
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Motor Digging Machine.
The need foe tractive effort, and the was4.: ol energy coasequent upon the insertam and withdrawal of wheel spuds Will seem alike to be obviated by the self-contained motor tilling machine which is the subject of specification No. 116,291, by an Italian, F. Filiasi. Specially' designed digging tools are fitted to the rims of all the wheels of the machine. The implements are an conetructed that as the machine travels, these diggers penetrate the earth, re
move and throw laterally the equivalent
of about ft spadefal of soil. They are spaced evenly round the rim of 'each wheel, being more or less pointed, but as regards width of base, this. corresponds to that of the rim of the wheel. In the typical design Which is illustrated, four wheels are employed, and they are so disposed that as the machine progresses the equivalent of four furrows are dug. The action is not so much like that of a plough as that of -an exagger-: ated hoe. It is agreed that this'inethed of cultivation .wouki;not be universally applicable or advisable, and in certain cases it is recommended that the motor digger go first and be followed by a plough which may turn over the pound in customary fashion, but perhaps more d 'eply than could otherwise be effected.
Another patent in connection with agricultural marlines is No. 121,530, by J. Joiner. 'This is an attachment which is meant to be used in connection with an ordinary motorcar chassis. A framework so disposed as to hinge on the outer casing 'of the vehicle back axle carries at its rear end the tractor axle and its framework, the front ends being connected through nut and worm gear to a lifting and lowering gear. Thera are two main positions for the framework. In one, by manipulation of the lifting gear, the tractor axle is lifted so that the wle..e's age clear of the ground., and the vehicle can be used at normal speeds for traversieg die roads. In the alternative eosition the lifting gear is operated so that the tractor wheel takes up a position below the level of the car axle, and this lifts the wheels of the latter off the ground. . The driving connection between car axle and tractor wheels is by outside roller chains. The adjustment for the tension of these chains is provided by carrying the tractor axle in an eccentric bracket., and'aufficient movement is provided by means of this eccentricity to allow of the chains being readily removed when the vehicle is intended to be used on the wads.
An interesting hydraulic power transmission is the subjectiof No. 121,515, by
Lampiough. A hydraulic pump and a hydraulic motor similar in design and dimensions are enclosed within a casing. The engine drives the•pump, which forces fluid through suitable ports to the motor, which transmits the power to the secondary shaft. Means are provided for varying the eccentricity or length of crank aria of the pimp. With the eccentricity at a maximum, it large quantity of water is pumped at. a comparatively low pressure. This drives the hydraulic motor at the highest speed. With the eccentricity reduced, the quantity of water is likewise diminished, but the pressure is higher. This gives us a motor revolving more slowly, but with a greater torque. An 'infinite gradation of speeds between highest and lowest is possible, and in one modification of this invention; a pair' of dog clutches are in. terposed between driving and driven shaft, thus providing for a direct drive cm top gear.
A useful complement of the motor wagon is a loading skid. . An improved form of this device is patented in No. 121,559, by W. Alexander, who fits the skid with small rollers, with the object of reducing the resistance to large parcels which may be slid along the -skid.
A qpiekly-removable and completely insulated connector between high-tension leads and sparking plugs, in No. 112,463, Jouveau. An ebonite holder is bored to receive two 'cylindrical metal pieces which slide telescopically one within another, and are held apart bya spring. In one position of these cylinders, holes suitable for the reception of the sparking plug terminal coincide. The cylinders are brought into this position by means of a press button, and once sped over the plug, the spring prevents accidental disconnection. A similar manipulatioe. of the press.huttan releases the terminal as required.
No. 121,511, by E. W. Petter, relates to engines in which the liquid fuel is injected just before and/or just after .cornpression. W. H. Bentley, in No. 121,514. describes an arrangement of gas container for a motorcar. He uses a number of comparatively small cylinders fixed upoz
the footboard of a touring car. The cylinders are specially constructed so as to be able to withstand gas under pressure, and they are suitably interconnected, one with another.
wo. 121,542, by C. A. Miller and another, describes brackets for vehicle side lamps, the special feature being that profision is made to allow of the lamp showing a red light to the rear through an aperture in the bracket.