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Manufacturing

On The Influence Of Durability On Price
197. Having now considered the circumstances that modify what...

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

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

On The Exportation Of Machinery
437. A few years only have elapsed, since our workmen were n...

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

On Combinations Of Masters Against The Public
376. A species of combination occasionally takes place among...

On The Effect Of Taxes And Of Legal Restrictions Upon Manufactures
414. As soon as a tax is put upon any article, the ingenuity ...

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...

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...

Registering Operations
65. One great advantage which we may derive from machinery is...

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

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

On The Cost Of Each Separate Process In A Manufacture
253. The great competition introduced by machinery, and the ...

Copying With Elongation
140. In this species of copying there exists but little rese...

On The Division Of Labour
217. Perhaps the most important principle on which the econo...

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

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

On A New System Of Manufacturing
305. A most erroneous and unfortunate opinion prevails among...

On The Method Of Observing Manufacturies
160. Having now reviewed the mechanical principles which reg...

On The Position Of Large Factories
277. It is found in every country, that the situation of lar...



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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