Author: A. C. Hobbs
Publisher:
Published: 2020-10-24
Total Pages: 312
ISBN-13:
DOWNLOAD EBOOK →The manufacture of locks, and a consideration of the mechanical principles involved in their construction and security, have never yet been treated with any degree of fulness in an English work. Lock-making has occupied a large amount of ingenuity, and lock-patents have been obtained in considerable number, though not always, we are satisfied, with a commensurate return for the expense incurred,--but lock-philosophy (if so it may be designated) has not been largely attended to.And yet it may safely be said that much which is both mechanically and commercially important is comprised in a lock. Every improvement in the manufacture of iron, steel, and brass--that is, in the tool-making and machine-making processes--may be made to reflect its light on the lock-manufacture; the stamping, the casting, the planing, the slotting, the screw-cutting, the polishing of metals,--all, in proportion as they are improved, impart some of their aid to the lock-maker. Then, in the finer kinds of locks, the works are so delicate as to approach to the nicety of clockwork; thereby combining the manipulative skill of a talented artisan with the rougher mechanical work of the smith. The principles of mechanical science are also appreciated by many lock-makers. The lever, the inclined plane, the eccentric, the cam, the screw, the wheel and pinion, the ratchet, the spring,--all are brought to bear on the internal mechanism of locks, frequently in many novel combinations.
Author: William R. Cheswick
Publisher: Addison-Wesley Professional
Published: 2003
Total Pages: 466
ISBN-13: 9780201634662
DOWNLOAD EBOOK →Introduces the authors' philosophy of Internet security, explores possible attacks on hosts and networks, discusses firewalls and virtual private networks, and analyzes the state of communication security.
Author: George Price (of Wolverhampton.)
Publisher: London : Simpkin, Marshall
Published: 1856
Total Pages: 1000
ISBN-13:
DOWNLOAD EBOOK →Author: George Drysdale Dempsey
Publisher:
Published: 1867
Total Pages: 274
ISBN-13:
DOWNLOAD EBOOK →Author: A. C. HOBBS (of New York.)
Publisher:
Published: 1868
Total Pages: 256
ISBN-13:
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