Page:Rudimentary Treatise on the Construction of Locks (1853).djvu/225

Rh :, 132, contrivances to prevent the picking of locks, 105.
 * Lock trophy, Aubin's, 166; locks composing the, described, 165.
 * Lock and key, improved, 176.
 * Locks, English patents for, 164; Jury Report, Exhibition of 1851, on, 131; observations on the Report, 133; effects of the Exhibition of 1851 in improving English locks, 140; use of machinery in the manufacture of, 163, 200.
 * Locks, &c., invented by the Marquis of Worcester, 35.
 * Locks and keys, literature of, 4; list of references in the "Transactions of the Society of Arts" relating to, 166.
 * Louis XVI, his fondness for lockmaking, 26, 35.


 * Machin's web key, 61.
 * Mackinnon's key, 62.
 * Manufacture of locks and keys at Wolverhampton, state of the, 154.
 * Marshall's secret escutcheon, 37.
 * Master keys, 31.
 * Meighan's alarum lock, 40.
 * Mitchell and Lawton's tumbler lock, 52.
 * Mortise locks, 17, 18.
 * Maltiple-bolt locks, 41.
 * Nettlefold's lock, 60. Newell's parautoptic lock, 89.


 * O'Brien, Captain, on Davies's lock, 112.
 * Owen's experiments on Chubb and Bramah locks, 59.


 * Parautoptic lock, 89; key, 91; Austrian Report on, 93; English patent for, 98; attempts to pick the, in America, 106; Report of the American Institute on the lock, 107; latest challenge issued by Messrs. Day and Newell, 108; Mr. Garbutt's attempt to pick the, 184; failure of the attempt, 135.
 * Parnell's defiance lock, 141.
 * Parson's lock, 61.
 * Patents, English, for locks, 164.
 * Pin-lock of Egypt, 14.
 * Puzzle-lock, 19.


 * Regnier's puzzle locks, 21.
 * Right-hand lock, 17.
 * Ring lock, 17.
 * Roman locks, 10.
 * Rowntree's tumbler lock, 50.
 * Russell's screw-lock for casks, 38.
 * Russian locks, 171.
 * Rutherford's lock, 39.
 * Ruxton's detector for tumbler locks, 5d.


 * Safes, value of iron, 901; Chatwood's, 203; see also Iron Safes.
 * Saxby's prize lock, 152; picked by Mr. Hobbs, 153.
 * Screw locks, $8.
 * Skeleton keys, 30.
 * Society of Arts' prize look, 30.
 * Somerford's lock, 60.
 * Spring-stock luck, 17.
 * Stansbury's lock, $3.
 * Stop lock, Fenby's, 196.
 * Straight locks, 18.


 * Tentative process of lock-picking, 110.
 * Three-bolt lock, 17.
 * Tumbler locks, 43; lock described by M. de Réaumnur, 46 5 modern tumbler lock, 82; introduction of the detector, 53; Chubb's lock, 53, 56; key of, 57; advantages and defects of tumbler locks, 63; Hobbs's method of adjustment, 63.
 * Tumbler locks, Mr. Fenby on, 174; method of picking, 118; double action, 49.
 * Two-bolt lock, 17.


 * Ward locks, 18.
 * Warded locks, 27; action of the key on the wards, 28; insecurity of, 29; warded locks of the last