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Manufacturing

Increase And Diminution Of Velocity
32. The fatigue produced on the muscles of the human frame d...

Of The Identity Of The Work When It Is Of The Same Kind And Its Accuracy When Of Different Kinds
79. Nothing is more remarkable, and yet less unexpected, than...

Of Copying
82. The two last-mentioned sources of excellence in the work ...

Of Raw Materials
210. Although the cost of any article may be reduced in its ...

Distinction Between Making And Manufacturing
163. The economical principles which regulate the application...

Accumulating Power
20. Whenever the work to be done requires more force for its ...

Sources Of The Advantages Arising From Machinery And Manufactures
1. There exists, perhaps, no single circumstance which disti...

Saving Time In Natural Operations
47. The process of tanning will furnish us with a striking i...

Of Printing From Cavities
83. The art of printing, in all its numerous departments, is ...

Exerting Forces Too Great For Human Power And Executing Operations Too Delicate For Human Touch
56. It requires some skill and a considerable apparatus to e...

On Over Manufacturing
284. One of the natural and almost inevitable consequences of...

Extending The Time Of Action Of Forces
45. This is one of the most common and most useful of the em...

On Combinations Amongst Masters Or Workmen Against Each Other
353. There exist amongst the workmen of almost all classes, ...

Regulating Power
27. Uniformity and steadiness in the rate at which machinery ...

On Contriving Machinery
318. The power of inventing mechanical contrivances, and of ...

Proper Circumstances For The Application Of Machinery
329. The first object of machinery, the chief cause of its e...

Of Money As A Medium Of Exchange
166. In the earlier stages of societies the interchange of t...

Economy Of The Materials Employed
77. The precision with which all operations by machinery are ...

Of Copying With Altered Dimensions
147. Of the pentagraph. This mode of copying is chiefly used ...

On The Influence Of Verification On Price
181. The money price of an article at any given period is us...



Extending The Time Of Action Of Forces








45. This is one of the most common and most useful of the
employments of machinery. The half minute which we daily devote
to the winding-up of our watches is an exertion of labour almost
insensible; yet, by the aid of a few wheels, its effect is spread
over the whole twenty-four hours. In our clocks, this extension
of the time of action of the original force impressed is carried
still further; the better kind usually require winding up once in
eight days, and some are occasionally made to continue in action
during a month, or even a year. Another familiar illustration may
be noticed in our domestic furniture: the common jack by which
our meat is roasted, is a contrivance to enable the cook in a few
minutes to exert a force which the machine retails out during the
succeeding hour in turning the loaded spit; thus enabling her to
bestow her undivided attention on the other important duties of
her vocation. A great number of automatons and mechanical toys
moved by springs, may be classed under this division.

46. A small moving power, in the shape of a jack or a spring
with a train of wheels, is often of great convenience to the
experimental philosopher, and has been used with advantage in
magnetic and electric experiments where the rotation of a disk of
metal or other body is necessary, thus allowing to the enquirer
the unimpeded use of both his hands. A vane connected by a train
of wheels, and set in motion by a heavy weight, has also, on some
occasions, been employed in chemical processes, to keep a
solution in a state of agitation. Another object to which a
similar apparatus may be applied, is the polishing of small
specimens of minerals for optical experiments.





Next: Saving Time In Natural Operations

Previous: Increase And Diminution Of Velocity



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