Electric motors : letters patent to Edward Henry Cradock Monckton, of Fineshade, Northamptonshire, for the invention of "Improvements in generating and applying the electric current and in producing motive power, and in the apparatus necessary for carrying the same into " : Sealed the 23rd February 1877, and dated the 28th November 1876.

  • Monckton, E. H. C. (Edward Henry Cradock)
Date:
1876
Catalogue details

Licence: Public Domain Mark

Credit: Electric motors : letters patent to Edward Henry Cradock Monckton, of Fineshade, Northamptonshire, for the invention of "Improvements in generating and applying the electric current and in producing motive power, and in the apparatus necessary for carrying the same into " : Sealed the 23rd February 1877, and dated the 28th November 1876. Source: Wellcome Collection.

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    MoncktoiCs Improvements in Electric Motors. Secondly. I construct all my circular electro-magnets by coiling insulated wire with thin sheet iron interposed between every successive two or more- coils over a hollow central iron tube; by preference the two polar ends of this tube are made very large, somewhat resembling those of a reel for winding thread on, except that they are by preference dished or carved, either outwardly, so that their rims or 5 edges project outwardly beyond the centre of the magnet tube, or inwardly, so as to pass over the top of the coil and to face inwards towards its centre, and thus the two magnetic poles are formed cup-shaped ; these polar discs or cups are by preference slotted, so that as they pass the poles of the magnets forming the circles, they alternately unite them into one complete circle and disunite them. Where I 10 use a series of electro-magnets, I unite by preference the coils on them from magnet to magnet so as to form one complete circle of magnetic coils, and in this manner I form two distinct and complete magnetic circles, the one fixed, the other rotating; the poles of such magnetic circles can be changed by using proper commutators. Thirdly. I vary the form of ordinary permanent and electro horse-shoe magnets 15 by curving their ends inwards so as to make them face each other, and by applying to them my novel bowl-shaped poles dished by preference inwardly, by which means the magnetic force is caused to lie chiefly in the outward edges or rims of the bowls and less in their centres which are least prominent, and I also when desired cut slots in the edges or rims to these bowls, so as to cut off magnetic contact at 20 those parts. I cause my globular magnet above described to revolve with its semi¬ circular poles curved inwards facing and lying within the hemispherical poles of a large magnet so constructed, the axle being arranged so as to pass through the centre of the former and between the poles of the latter, and I vary this construction by making the poles of the large magnet curved hollow and shaped semi-cylindrically, 25 and the rotating magnet with each of its poles curved round semi-cylindrically, so that they can rotate within the former. Fourthly. I attach also straight or curved electro or permanent magnets, as the case may be, by their centres in a circle round the periphery of a metallic disc or ring, making them to face outwardly in the former and inwardly in the latter case, 30 and I also insert their ends circularly into the sides of discs, uniting their coils together all round, and thus form a complete magnetic circle. I further construct a novel form of engine by placing a fixed circular or other shaped electric fluid reservoir or condenser between two electro-magnet cylinders, each rotating opposite to a similar fixed magnet circle, the axletree common to both passing through its 35 centre; these rotating magnets are arranged with their commutators so that their poles attract those of the magnets attached to the fixed circles, while simultaneously the poles of the magnets on the rotating circle repel the poles of the magnets attached to the fixed circle placed opposite to them ; just as the poles are passing the centres of attraction, a rotating commutator changes the direction of the current, 40 and those magnets which, before attracted now repel, while those that previously repelled now attract, so that by this means the power is applied continuously all lound the circle, one commutation serving for each entire circle. The poles may be similarly changed, and with the same effect on each circle. In addition to the condenser I sometimes add an intensity coil, so that the currents from the battery 45 lave to pass first through the condenser and then through the tension coil prior to entering the magnets, the condenser acting as a reservoir already charged from the a eiy, while the tension coil gives to the current the degree of intensity calculated o proc uce the best and strongest effect on magnets always in the closest possible proxmuty. It must be borne in mind that we are here dealing with a power vastly 50 .1 eien . rom ordinary. mechanical ones, and that the velocity produced by in nsi )ing the current is in its own action an element of great power, especially w eie e magnet poles as in the present instance are always in the closest possible approximation. r Fifthly. I fuither improve the above construction by causing the poles of each 55 magne o ac doubly, that is, to attract at the one side while repelling at the other Hi e, w ich eflect by placing the circle of rotating horse-shoe magnets with theiv 22503477840