AT THE HEART OF THE ROAD TRANSPORT INDUSTRY.

Call our Sales Team on 0208 912 2120

Patents Completed.

24th November 1910
Page 22
Page 22, 24th November 1910 — Patents Completed.
Close
Noticed an error?
If you've noticed an error in this article please click here to report it so we can fix it.

Which of the following most accurately describes the problem?

ELECTRIC-DYNAMO MACHINERY. —Midgley and Vandervell.—No. 16,447, dated 14th :July, 1909.—This invention is for an electric-dynamo machine, in which the rate of revolution is variable, as, for example, in dynamos for train lighting, and it can be used in either direction of

rotation so that, it, will give a constant, output at varying speeds. The machine consists of a suitable armature and of a pair of wound poles which may be excited by any suitable means. Between the excited poles is placed a pair of special poles having no winding. An armature coil cutting the flux from the wound poles is arranged to he short-circuited by the commutator brush, and the current thus produced in this short-circuited coil generates a magnetic flux at right angles to the plane of the coil. The resultant of this flux and of the flux from the wound poles is a flux into the unwound poles which, being cut by the armature coils, generates the working current. According to the direction of rotation of the armature so depends the direction of distortion of the magnetic flux ; consequently the working current always flows in the same direction whatever the direction of rotation of the armature. As the working current taken increases, the armature reaction thereby produced is increased, the flux from the mould poles is weakened, the local current generated in the short-circuited coils is reduced, while the output is kept practically constant.

MOTOR PLOUGHS.— Stock. —No. 8,960/1910, dated under International Convention 29th April, 1909,—This specification describes a self-propelled motor plough, wherein a single vertically-adjustable steering wheel is arranged at the rear end of the plough on one side of the frame. This steering wheel is provided with a projecting kid fe-like flange on its circumference, that engages with the unploughed ground, thus exercising the lateral pressure required for steering the plough.

The steering wheel is carried on a toothed rack mounted in vertical guides on the rear of the main frame. The rack is engaged by a pinion mounted on the frame, which is rotated through the medium of a chain and chain wheels from a handle arranged in such position to be within easy reach of the operator. The steering wheel is mounted so that it can rotate in a horizontal plane and is operated by links, which are controlled by means of a hand wheel through the medium of a worm and a toothed sector.

CARBURETTER. — Hamilton.—No, 24,544, dated 26th October, 1909.—This specification describes an automatic carburetter. According to one construction, the nozzle in the mixing chamber has mounted upon, and arranged to slide thereon, an air-controlling valve. This air-controlling valve is of colloidal shape. The seat for this air valve is provided with vertical walls. Directly connected to the air valve, and in such manner as to be operated simultaneously with the same, is a conical needle valve controlling the fuel inlet. The air valve is held on its seat by a helical spring, and thus, as the depression in the mixing chamber varies, the valve automatically moves until it assumes aposition of equilibrium. The fuel nozzle is preferably provided with annular and circumferential grooves, and the hollow stem of the air valve closely fits around the air body, so as to form an annular air pocket or cushion which, during the movement of the valve, will prevent it from hunting or dancing. It will be seen that the admission of fuel and that of th e air are cont rolled situulta I ieu ugly by the coincident movement of the two valves. The walls of the air valve are of determined configuration, that is arrived at by acalculation which is described in the specification.

H1GH-TENSION MAGNETO MACHINE.--De Dion-Bouton.—No. 2,883, 1910, dated under the International Colo yetition 6th February, I909.—This invention describes a high-tension-magneto machine of the geared-distributor type, and it particularly relates to the means for establishing electrical connection be. tween the armature of the magneto and the contact members of the distributor. The two-to-one gear of the magneto machine is insulated front the earth and effects its electrical connection between the armature and distributing device. The pinion on the armature spindle which gears with the two-to-one wheel, instead of being keyed direct to the spindle, is carried on an insulated sleeve which may be secured to the spindle in any convenient manner. Parallel to the spindle is a tube. This tube has metallic contact with the pillion on the armature spindle and one end of the armature coil is introduced in the tube and makes electrical contact therewith. The two-to-one wheel is formed of insulating material, and has on OLIO face an annular plate that extends to the periphery of the wheel ; it has teeth cut in it, corresponding to the teeth in the wheel, so that it meshes with the pinion on the armature spindle. Secured to the same face of the two-to-one wheel as the plate just mentioned, is a carbon carrier, which is fixed bv means of a screw that enters this plate, so that metallic contact is established between the plate and the carbon

Tags


comments powered by Disqus