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Updated: April 30, 2025
If you do not possess any brass strip, the lever may be supported on wooden uprights glued and screwed to the base. Contact M is a small piece of brass attached to the base by a screw at one end and by T1 at the other. K was drilled near the end to take the short coil of insulated wire joining it to T2, and O was similarly connected with T4. The spring, S, should be fairly strong.
The length of this period is controlled by the set screws at the free end of B2. The fly wheel may be a disc of wood. Oil all the rubbing parts slightly. Connect T1 to one terminal of the battery, T2 to the coil, and the other terminal of the battery to the coil. Set the engine going.
The strip must be bent so that it presses naturally against T2. A little trigger, B, which you can cut out of sheet brass, is pivoted at a, where it must be raised off the base by a small washer. It projects 1/4 inch beyond the base on the gong support side. A square nick is cut in it at such a distance from a that, when the wire spike on C is in the nick, the strip is held clear of T2.
A wooden lever, L, is pivoted on a support, A. Passing through it at the forward end is a metal bar having at the top a knob, K, which can be grasped conveniently in the fingers; at the other a brass screw, O, which is normally pulled down against the contact, N, by the spiral spring, S. The contact M under K is in connection with the binding post T1 and N with binding post T3; K is joined up to T2, and O to T4.
Attach this piece by first binding to its extremities two strips of aluminium, or by preference very thin tinned iron, Tl and T2. The Wheels and Chassis. WW are the two wheels on which the model runs. They are made of hollow brass curtain rings, 1 inch in diameter, such as can be bought at four a penny.
The two links, LL, are thin springy brass strips slightly curved, and at the rear end pivoted on the binding posts T1 T2. Underneath the other ends solder the heads of a couple of brass nails. The links are held parallel to one another by a wooden yoke, from the centre of which projects a handle.
The automatic safety bulkheads had all closed, and the big spoke Section T2 was the only section to blow its air, and Kieran was the only man caught in it. The alarms went off, and while the wreckage of the ferry, with three dead men in it, was still drifting close by, everyone in the Wheel was in his pressure-suit and emergency measures were in full force.
The tails of the terminals T1 T2 must be truncated sufficiently not to penetrate the base and make contact with the barrel, or a "short circuit" will be evident as soon as the battery is connected up.
To carry out this idea the inlet valves are furnished with two guides, which, passing upward through the stuffing-box, are attached to a hard steel cross piece, which receives the action of a bent catch turning on a pin attached to the levers, t1, t2, t3, t4.
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