How to make inventions; or, Inventing as a science and an art . t out, as they need no match to light it with,and they will reply that it is not a question of economy alone,but of convenience for a night lamp, or as a means of showing asa signal where a lamp is, in an otherwise dark room. Thisproblem has been solved in three distinct directions. Can thatreader who is ignorant of the means invented, re-invent themfor the sake of practice ? 18. Reference has been made to a substitute for the carbontelephone transmitter, in order to give another inventor a chanceto benefit himself and others, aft
How to make inventions; or, Inventing as a science and an art . t out, as they need no match to light it with,and they will reply that it is not a question of economy alone,but of convenience for a night lamp, or as a means of showing asa signal where a lamp is, in an otherwise dark room. Thisproblem has been solved in three distinct directions. Can thatreader who is ignorant of the means invented, re-invent themfor the sake of practice ? 18. Reference has been made to a substitute for the carbontelephone transmitter, in order to give another inventor a chanceto benefit himself and others, after the monoply has been so longheld by another party. A similar case is found in time locks forsafes. A time lock is of no value if it can be opened by anysecret, before the time set. But suppose the clockwork stopsbefore that time. There should be secret means of opening itunder this condition. In the present system, the time lock iscombined in such a manner with a combination lock that if theclock should stop before the time set for opening the safe the 165. iiiiniiniiiiiiill^IllllllllfllllSS t I
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Keywords: ., bookcentury1800, bookdecade1890, bookidhow, booksubjectinventions
