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Manufacturing

Of Copying By Casting
105. The art of casting, by pouring substances in a fluid st...

On The Effect Of Machinery In Reducing The Demand For Labour
404. One of the objections most frequently urged against mac...

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

Enquiries Previous To Commencing Any Manufactory
298. There are many enquiries which ought always to be made ...

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

On The Duration Of Machinery
340. The time during which a machine will continue to perform...

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

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

Of Copying By Punching
133. This mode of copying consists in driving a steel punch ...

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

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

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

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

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

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

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

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

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

Of Copying By Stamping
128. This mode of copying is extensively employed in the art...

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



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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