US8603A - Improvement in chronometric locks - Google Patents

Description

UNITED' STaTns PATENT Genion.

`nv:PR'oven/laurier koi-lnonownarulc: LOCKS. l

Specification forming poi-t of Letters Patent No. 8,603, dated December LVS, 185i.

` To all whom t may concern:

Be it known that I,.WILLIAM L. Bass, 'of Boston, in the county of ASntfollt and Stute of Massachusetts, have invented certain new and useful Improvements in the Manner of Fastening the Doors f Safes, Bank-Vaults, Sie.; and that the following description, taken in connection with the accompanying drawings, hereinafter referred to,forms a full and exact specification of the same, wherein I have set forth the nature and prin'ciplesof iny'said improvements, by which my invention vmay be distinguished from others of a similar class, together with such parts as I claim and desire to have secured to me by Letters Patent.

The figures of the accompanying plates of drawings represent my improvements.

In Plate 1,Figu re1 isa side eleva-tion of my apparatus with the front plate of the clockwork and the pendulum removed. In Plate 2, Fig. 2 .is a front eleva-tion of the door, Sac., showin g the manner of moving the bolt. Figs. 3, 4, and 5 are detail views of the lifting apparatus; and Figs. 6 and '7 are detail views, which will be hereinafter referred to.

The peculiar features of my invention con.

-sist in certain additions' to the known machinery for relieving the pawl from a bolt, by means of machinery inside of the door, and actuated by a time-piece in the same locality, which additions consist in a peculiar arrange ment of mechanism, hereinafterl referred to and explained, which permits the door to be opened from the outside in case the clock should stop from 'any cause, while the door cannot be opened by the same arrangement while the clock-work is in motion.. ,A

c c a in the drawings' is the door, which, it will be observed, hasnothing on the outside but the knob or handle b. c c is the lock or frame-work, of iron, on the inside of the door, in which is the bolt e, moved in and out by means of a pinion, f, (shown by ,dotted lines in, Fig. 2, Plate 2,) attached to the' shaft of the knob b, and playing in a geared rack, g.

The bolt c has a notch in it, into which tits the'pawl or projection h of the lever 11.13(secured on theinsde of the partition, near the door,} which lever swings freely on a fulcrum at la. In the end of the weight fi is la'hook, l, which iits over a projecting arm, on., 011 the hinged slotted plate n, (shown more particuliirl ing against the thebolt, as will readily be understood by inspection ofthe drawings. l

should stop from any disarrangcment of its part-s the door could not be openedI by the above mechanism, which would prove a sethis contingency, l lia-ve contrived aliftin gapparatus,'by which the lever h can be lifted very slowly from theybolt from the outside when the clock is stopped, but which lever cannot be raised when the clock is in motion,

thus 'proving'an eflicient bar to bnrglars or ,other malicious persons.

The lifting apparatus above referred to is representedl in Figs. 3, 4, and v5, Plate 2, of which Fig. 3 is a side elevation, Fig. 4, a section taken in the` plane of the line A B, Fig. l, Plate l, shcwin g the horizontal'screw-shaft, partition, &c., and Fig. 5 is a section taken in the plane! of the line B C of the said Fig. 1, showing the' vertical lifting-screw, 810. v

A A A is a frame of Vmetal or other suitable material fastened tothe partition, through which frame is inserted vertically, a fine threaded screw, B B, on which pla-ys a burrwheel, C C, having shoulders which bear against the rightangular projections of said frame A A A. This burr-wheel is turned by an endless screwon the horizontal shaft D l), which passes through the partition, as shown in Fig. 4. Theturning of the nut G C raises the vertical screw B B, to the lower end of which is fastened a chain or cord, E E, which runs on a pulley, F, attached to the lever la. c', and passes up to a forked lever, G, Fig. "7, Y'Plate 2, the other end of said chain passing over a pulley, H, and ending in a Weight, I, as represented in the drawings. The forked lever Gr turns on a fulcrum-at K, and has snsthe arm m from the hook l and -the pawl from But-it will be evident that in case the clock rions'inconvenience. In order to provide for Y another.A

pnded in its 'forked end a' swinging loop, L, there being in the ends -of the fork pins or stops to lprevent the loop 'from swinging in beyond a right angle with the lever G.' The loop hangs under a ratchet-wheel, M, placed on the shaft of the third wheel t f By applying `a thumb nntor crank tothe endless-screw shaft D l). on the outside'of the partition, the vertical screw4 B B will raise the cord' E E, and consequently the .lever In,

from the holt, when the clock isstopped, -the loop Lin thel forked lever G catching in the teeth of the wheel M, and thereby holding' the lever Gr firmly in itsv place. The ratchet-- wheel cannot revolve when the'clock is stopped,

i asthe wheels are all held rlnly in'tlieir places by means' of the motionless pendulumin the guide; but Whenthe. clock -is in motion, and also the ratchet-wheel M, lthe loop, instead of catching in the teeth of -said wheel, will drop from one tooth to another, because therat'chet-wheel yrevolves in the saine direction as the loop is raised, and not against it, and the yratchet-ve'hee'l revolves much faster than the 'vertical screwcan be raised by means ot' the -cr'a-nk on the endless-,screw shaft. Thus, if

the loop is' raised by.the lifting-screw while the Works are in motion, the ratchet-teeth will continuallypass the' bend of the loop, said loop. as aforesaid, dropping from one toot-h to In a Working-machine Vit. is better to fasten the upper end ot' fthe c ord to the top of the screw B B, instead of to the small weight I,

as said weight causes some strain on the lever-l 11, t', though not enough to raise thesalne. `When it is fastened to-.the top ofthe screw,

the screw Willv give outl the cord at the top,

the forked lever Gr yielding at the same time,

said cord being taken up in the same propor- -endless-screw shaft as there are burrs or cuts on the Wheel, in order torais'e-the liftingrlscrew the thickness of one thread.

It may be observed that the sweep of the outer end of the forked lever, where the cord isfastened, must be as long` or longer than the lift ofthe vertical "screw, so that the said without causing .any strain on the forked lever; lotherwise the pawl might be lifted from the notch in the bolt.

Having thus described my improv shall state my claim 'as follows:

What Irclaim as my invention, and'desire e to have secured to me by Letters Patent, is The manner of disen'gaging the droplever the partition when the clock is stopped, and

the clock is in motion by means of the lifting` screws, in combination with the forked lever,

in the manner above described.

WM. L. BASS.; Witnesses:

JOSEPH GAvn'rT, LznAtLINcoLN.

tion at the bottom of the vertical screw, and;

Wouldtake the same number of turns of the y screw can be raised or lowered its f ull length` ement, l

from the notclr of the bolt from the outside of l 'preventing the same from being effected when i swingingloop, and ratchet-wheel, substantially Y

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