ing fillings.
Per-mu-ta′tion-lock.
(Locksmithing.) A lock which the moving parts are capable of transposition, so that, being arranged in any concerted order, it becomes necessary before shooting the bolt to arrange the tumblers.
The letter-lock (which see) appears to have been the earliest of this class; and locks on the same principle, but of more complicated mechanism, still form a favorite subject of invention.
The permutation principle was introduced into tumbler-locks by Dr. Andrews of New Jersey, about 1841.
The tumblers are capable of variable adjustment, and the key has a series of small shiftable steel rings of such radii as to suit the variable tumblers.
To this succeeded the Hobbs lock, invented by Newell of New York, which is provided with a series of secondary tumblers separated from the main tumblers by a wall; the secondary tumblers have notches corresponding to teeth on a series of intermediate tumblers, which teeth correspond to the hights of the main
n chamber, the water being driven around its margin by the centrifugal power of the wheel.
For early inventions in this line, see,--
Le Demour1732
Inverted Barker's mill
Jorge-West.1816
Massachusetts centrifugal1818 and 1830
Blake1831
Andrews1839
Whitelaw1841 and 1846
Gynne1844
Bessemer1846 and 1851
Andrew1846 and 1850
Van Schmidt1846
Appold1848
See also centrifugal pump.
Fig. 4467 is a (so-called) rotary pump.
All that is rotary about it is the wheel, on which are the
72,729.Fink31, 12, 1867
72,831.Ferry31, 12, 1867
66,312.Donehoo2, 7, 1867
59,965.Chapman27, 11, 1866
59,819.Clark20, 11, 1866
73,875.Clark28, 1, 1868
61,522.Donehoo29, 1, 1867
52,139.Christ and
Stehman23, 1, 1866 Running-Rein.
67,837.Andrews (over-head)20, 8, 1867
69,893.Beans15, 10, 1867
66,941.Brown23, 7, 1867
80,897.Barnes11, 8, 1868
Running-Reins to pull on the Bit to check Horses, mostly in connection with Gag and Check Hook.
74,623.Smokey18, 2, 1868
Seitz26, 9, 1
nterApr. 13, 1869.
89,040GuinnessApr. 20, 1869.
89,064MuirApr. 20, 1869.
89,489LyonApr. 27, 1869.
89,987GriswoldMay 11, 1869.
90,552JonesMay 25, 1869.
93,511AndrewsAug. 10, 1869.
93,921Stoops et al.Aug. 17, 1869.
93,881HeckendornAug. 17, 1869.
93,962ButterworthAug. 24, 1869.
94,112HoffmanAug. 24, 1869.
94,467BradishSept.v. 8, 1864.
45,059MackNov. 15, 1864.
45,528SmithDec. 20, 1864.
49,023ZuckermanJuly 25, 1865.
52,847HarlowFeb. 27, 1866.
56,805SchwalbachJuly 31, 1866.
58,366AndrewsOct. 2, 1866.
60,433SingerDec. 11, 1866.
61,270SingerJan. 15, 1867.
76,807PepperApr. 14, 1868.
76,950SherwoodApr. 21, 1868.
77,715ChabotMay 12, 1868.
80,907Bng Surface above Cloth. (continued).
No.Name.Date.
12,577RobertsonMar. 20, 1855.
(Reissue.)343RobertsonJan. 15, 1856.
16,850RobertsonMar. 17, 1857.
18,566AndrewsNov. 3, 1857.
19,171BoydJan. 19, 1858.
22,225BerryDec. 7, 1858.
22,269TylerDec. 7, 1858.
(Reissue.)1,073TylerNov. 13, 1861.
48,007WittnebenMay 30, 1865.