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Manufacturing

Of Copying By Moulding
112. This method of producing multitudes of individuals havi...

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

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

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 The Future Prospects Of Manufactures As Connected With Science
453. In reviewing the various processes offered as illustrat...

On The Division Of Labour
241. We have already mentioned what may, perhaps, appear par...

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

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

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

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

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

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

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

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

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

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

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

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

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

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



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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