Page:Rudimentary Treatise on the Construction of Locks (1853).djvu/223




 * Adytic lock, 176; machine for manufacturing the keys of the, 185, number of changes in the lock, 188; advantages of, 189; discussion on its value, 192.
 * Ainger on the Bramah lock, 111.
 * Ainger's lock, 61.
 * Alarum lock, 40.
 * American locks, 82; Stansbury's lock, 838; Yale's lock, 83; Dr. Andrews's lock, 84; Day and Newell's locks, 86; their Parautoptic lock, 89; Hobbs's Protector lock, 99.
 * Ancient locks, 8.
 * Andrews's lock, 84; snail wheel lock, 85.
 * Appendix, 173.
 * Aubin's lock trophy, 166; locks forming it described, 168.


 * Barron's tumbler lock, 49; Bramah on, 68.
 * Bird's tumbler lock, 52.
 * Bramah on Barron's tumbler lock, 68; on the defects of the tumbler lock, 68; on the defects of the warded lock, 66.
 * Bramah lock, 70; cylinder lock, 73; number of changes in the Bramah lock, 81; picked by Mr. Hobbs, 121; report of the arbitrators, 123, 124; a description of the lock picked, 125; letters from Messrs. Bramah questioning the fairness of the trial, 126; method of picking, 110; method employed by Mr. Hobbs, 129; Ainger on the Bramah lock, 110; Farey on the Bramah lock, 113; improvements made since 1851, 131.
 * Browu's letter lock, 23; picked by Mr. Hobbs, 139.
 * Bullion vaults of the Bank of France, 206.


 * Chatwood's safes described, 203.
 * Chinese locks, 171.
 * Chubb on Davies's lock, 112; on lock picking, 132.
 * Chubb's lock, 53; described, 54, 56; key of, 57; attempt to pick, 58; experiments on, 59; number of changes in the lock, 55; the detector lock picked by Mr. Hobbs, 115; value of the detector questioned, 117; improvements, 121; Mr. Hodge on the Chubb lock, 114; Chubb's new locks, 147; bank locks, 149.
 * Clockwork, application of, to locks, 39.
 * Closet-lock, 17.
 * Commercial importance of locks, 2.
 * Contrivances for adding to the security of locks, 35.
 * Cut locks, 18.