US79388A - Eric h - Google Patents

Description

tui-teh tats; jsttnt fitte.

OLIVER E. PlIlLAR-D, OF `NE W BRITAIN, GONNEOTIOUTASSIGNOR TO FRED- ERIC H. NORTH, OF SAME PLACE.

Letters Patent No. 79,388, dated June' 30, 1868.

IMPROVEMENT IN PERMTATION-LOGKS-.

TO ALL WHOM IT LNIAY'CONCERN:

Be it known that I, OLIVER E. PILLARD, of New Britain, in'the lcounty oi' Hartford, andState of Connectiout, have invented, made, and applied tonse, a certain new and useful Improvement in Locks and I do hereby declare the following to bea full, clear, and exact description of the said invention, reference being had to the annexed drawing, making part of this specification, whereini v Figure 1 is an elevation of the lock, the back plate and circnlar-tumblers being removed.

Figure 2 is a section of the lock at the spindle, and l Figure 3 is a similar sectin, in larger size, of the disk `andring atthe end of the spindle.

Similar marks of reference denote the sameparts.

The object of my invention is toprevent any indication of the position of the interior parts by a movement of the knob and spindle in any direction, and thus render it impossible to tell, byfeeling, whenthe parts are properly placed for opening the lock.

Heretofore an inclined end to the spindle has been employed to -raise the dog that acts between-the tumbler andbolt, but that incline allowed oi' a'measurement being taken ofrthe relative position of the dog and l incline, according to the extent et' end motion of the spindle. Y

The nature of my said invention consists in an'irregular circular incline or truncated cone at the end of the spindle, for raising the dog, so as to prevent reliability in the measurements of any end movement, and thus increase the diculty in picking the lock.

And I make this truncated con-e as a loose ring, that may be turned with the spindle, or be stopped by the contact therewith of the dog, while the spindle continues to be turned, and thus prevent measurements being taken at one definite pnint todetermine ,the position of the'dog'relatively to the tumblers.

vI combine, with this conical ring and dog, a ring that hangs from thedog, and prevents the spindle engaging with the belt until the tumbler-s are all properly placed.

In the drawing, a is the lock-case, the bolt, e the spindle d the index and handle, and e Athe circular tumbler to be set separately and in succession. These parts are to he of any desired character,.and,rbeing well known, do not require further description. l

`fis the dog on the fulcrum g, taking the stop z'. On the'bolt k is afootto the'dog f.

The periphery'of the incline or truncated cone n, at the end of the' spindle c, may be circular orundulating. I have shown the same as circulan-with an undulating disk :e between the hub s and ring n, said disk being :fixed to and moving withythe hub s. The irregular shape of the periphery ofthe disk ze, as seen at the points 1 and 2, utterly derangcs anyebrt to effect a measurement to determine any of the positions of Athe parts by an end motion of the spindle or otherwise, and the 'ring n will turn with the spindle `whenthe dog is raisedby one of the projections 2', and be stoppedby the Contact ofthe dog with its edge.

The incline n, at the end of the spindle, is not regular, being fuller on one side than on the otl1er,`as seen in larger size in iig.- 3, so that if the dog is dropped by drawing the ring n from under the foot k, andthe stud o rests upon the edges ofthe tumblers,any measurement of the position of thatA dog, by reason ofthe end motion allowed to said Vspindle to the point of contact of n and lc, would be valueless in efforts to pick the lock,

because ofthe irregularity ofthe cone or inelinen; and as an additional security, the' conical ring n is loose, so l as to be stopped by the contactA therewith ofthe footc, and hence' the position ofthe irregularities of that cone to the dial; will be varied by the spindlebeing turned while the ring is stationary.

The bplt is moved by' the teeth 3 on the hub sk taking the teeth 4 on the bolt, but these parts cannot be brought into contact until the coinciding of the notches in the tumblers e-allows the dog f to fall, and move down with it the ring r, that has an opening just large enough to admit said hub s to be drawn back into it as the teeth 3 and 4 engage together. l'

What I claim, and desire to secure by Letters Patent, is-

1. The incline n at the inner end of the spindle, with an irregular surface, in combination with the dogf, and series of Itumblers e, as and for the purposes setforth.

2.`The ring n, tted loosely upon the inner end of the spindle, so that it may be stopped by conizact with .the dogf, as and for the purposes set forth. l

3. The disk x, withan irregular periphery, in combination with the spindle c and incline n, substantially as and for the purposes specified.

In witness whereof,'I have hereunto set; my signature, this thirteth day of November, A. D. 1867.

OLIVER E. PILLARD.

Witnesses:

Y HENRY NASH,

JOSEPH D. AMEN.

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