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Updated: May 17, 2025
Man is a self-acting machine. He cannot cease to be a machine; but, though self-acting, he may lose the powers of self-guidance, and in a wrong course his very vitalities hurry him to perdition.
Here, for instance, is a self-acting galvano-hydraulic engine, which will entirely supersede the use of steam, and, by preventing the consumption of coal now going on, will avert, or at least postpone, the decline of the British Empire. Able men have calculated that, in the course of a couple of hundred years or so, our coal-beds will be exhausted.
The moral of the above tale is upon the surface, apparent, and, so to speak, self-acting a circumstance which happily obviates the necessity of our discussing it together.
"And this room could not be entered without your knowledge while you were about the place?" "It is impossible. The door is fitted with a powerful spring and a feather-touch self-acting lock. It cannot be left unlocked unless you deliberately prop it open." "And, with your knowledge, no one has had an opportunity of having access to this book?" "No," was the reply.
The self-acting discharging tubes emptied it in less than two minutes; and the crew, supported by their cork life-belts, caught the life-lines festooned round the boat's side for this very purpose, and clambered into her. Of the men of the wreck who had been tumbled into the sea along with them, some clung to their rescuers, whose belts could easily sustain two.
I thought I would have a sort of perpetual manger that should shake down the hay when it was wanted, and a self-acting machine that should cut up the turnips and pass them into the mangers, and water always flowing for the cattle and horses to drink. With these simple arrangements I could lie in bed, and know that the "chores" were doing themselves.
When forced up to a given point a self-acting stop-cock shut off the pressure of the descending column, while a self-acting valve enabled the water contained in the cylinder to be discharged, on which the piston again descended, and the process was repeated like the successive strokes of a steam-engine.
While they are thus forming and changing, one state follows quite connectedly on another. At first one is tempted to believe that they are self-acting and self-regulating, that they move freely and pass from one state to another according to causes within themselves.
Q. How is the strength of the fire regulated? A. The draught through the furnaces of land boilers is regulated by a plate of metal or a damper, as it is called, which slides like a sluice up and down in the flue, and this damper is closed more or less when the intensity of the fire has to be moderated. In wagon boilers this is generally accomplished by self-acting mechanism.
I have heard the tea-cups rattle in the cupboard in my house a quarter of a mile from the place where the hammer was at work. Hand-gear was the original system introduced in working the hammer. A method of self-acting was afterwards added. In 1843, I admitted steam above the piston, to aid gravitation. This was an important improvement.
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