US863892A - Lock and key. - Google Patents

Description

PATENTED AUG. 20, 1907.

sis i i, 5522 W AGOSTINI LOOK AND KEY.

.APPLIOATIQN FILED JAN. 26. 1907.

THE NORRIS PETERS cn., WASHINGTON, n. c

WILLIAM AGOSTINI, OF FALL RIVER, MASSACHUSETTS.

LOCK AND KEY.

Specification of Letters Patent.

Patented Aug. 20, 1907.

Application filed January 26, 1907- Serial No. 354,204.

To all whom it may concern:

Be it known that I, WILLIAM Asos'rmr, a citizen of the United States, residing at Fall River, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Locks and Keys, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to locks and keys.

The principal object is so to design the eye and slot, bolt and key, that to gain access to the bolt of the lock, the web and pin of the key must bear one relation to each other, while after having gained said access, the web must, to operate the bolt, bear another relation to the pin. Broadly speaking, I accomplish thisobject by providing a key with a movably mounted web, and means to move said web in relation to the pin of the key, so that when in one position the pin and web can pass through the eye and slot of the look, but cannot operate the bolt, and when in the lock, the web can be moved into another position which would not have permitted the passage of the key through the slot, but which does permit the web to move the bolt.

Figure 1 is a side view of a key embodying one featm-e of my invention; Fig. 2 is a bottom view of the pin and web of same; Fig. 3 is a longitudinal section showing the movable web, and means for moving it; Fig. 4 shows the web moved into operative position; Fig. 5 is a perspective view showing the interior of a bolt case; a bolt and its tumbler; Fig. 6 is alike view of the lockplate, web lockplate, and key therein; all detached from the bolt case for the sake of clearness; the key being sustained in the eye and the slot of the plates. Fig. 7 is a cross section of the bolt case, web lockplate and lockplate, and shows how the web of the key is held in operative position after the key has been turned in the lock; Fig. 8 shows the relative positions of the key and the bolt, when the key just contacts the bolt case, and the web is in normal position; Fig. 9 shows the web of the key moved into operative position; and Fig. 10 shows the web in engagement with the bolt, and as having moved the same into locking position.

In the drawings is shown a key 1, embodying one feature of my invention. Its stem 2, Figs. 1, 2, 3, 4, has a longitudinal opening 3 in the pin portion 4 thereof; and movably mounted therein is a rod 5; the free end of which projects from the opening by reason of a spiral spring 6, abutting the inner end of the rod, and the innor end of the opening. The pin portion 4 has two cars 7, between which is a web 8, pivoted on a pin 9; and a link 10, Fig. 3, connects the rod 5 and the web 8, so that a movement of the rod, causes amovement of the web. A bolt case 11, Fig. 5, has movably mounted therein a bolt 12. One or more notches 13, 13", are cut in the bolt 12, to be engaged by the web 8 of the key,

for the purpose of moving the bolt. A tumbler 14 mounted upon a pin 15, has one spring end 16, in engagement with the case 11; another spring portion 17 is adapted to snap into engagement with one or more notches 18, 18, 18 in the bolt, for the purpose of locking the bolt in position; while still another portion 19 of the tumbler 14, lies parallel with and adjacent to notched portion 13 of the bolt. In the back of the bolt case is a depression 20, which is the axis of the eye 22 of the keyhole in key plate 21, Fig. 6, and which is for the reception of the projecting end of the rod 5 in the key. This plate 21 is secured to the back of the bolt case 11, by means of supporting members 23, shown in Figs. 6 and 7. A second plate 24, which for convenience may be called a web locking plate, is at right angles to the axis of the key, Fig. 6, and at such a distance from the back plate 11 of the bolt case, as will, when the key is in operative position and turned, see Figs. 7, 9 and 10,

permit the side of the web 8 of the key to engage the plate 23, Fig. 7, and thus be prevented by the latter,

from closing and assuming normal position, until the web and the slot in the plate coincide. The eye 22 and the slot 25 in the key plate 21 correspond in size with a cross section of the stem 2 and the closed web 8 of the key;

while the eye 25 and slot 26 of the web locking plate 24,

are of such size as will permit the key and its web, when closed, to pass through the same, as is shown in Fig. 6,

and, also to be opened, to assume position shown in Fig. 9. If desired the size of the slot 26, and the eye 25, may be such that the key cannot be turned unless the web has been completely opened.

The operation of my invention is as follows: The key in its normal position, Fig. 1, is inserted into the lock through the eye 22 and slot 25 in the key plate 21, Fig. 6, until the free end portion 5 of the rod in the pin portion 4 of the key, contacts the depression 20, Fig. 5, in the back of the bolt case 11, and the relations of the key, web, key plate and web lock plate are, as shown in Fig. 6. A person not understanding the use of the key, cannot move the bolt; first, because the side of the eye 25 and slot 26 in the web lock plate 24, contact the closed web 8; and further, should there be no web lock plate used, the key would be of no use; for as long as the web 8 remains closed, as in Fig. 8, the key can be rotated forever, without moving the bolt, for 100 the web being closed, cannot engage the notches in the bolt. If however, the rod 5 of key is pushed hard against the back 11 of the bolt case, see Fig. 9, and the tension of spring 6 in the key, is overcome, then the inward movement of the rod 5 moves the link 10, and 105 the web 8 assumes the position shown in Fig. 9; the inner edge of the web being inside of the web lock plate 24. Now, by turning the key while the web is open, the web engages the web lock plate 24, Fig. 7,

and hence by means of the bolt plate 11 and the lock web 1 1 0 plate, the web is held in operative position. As the web moves up and around, Figs. 9 and 10, it engages a portion 19 of the tumbler, overcomes the spring 16, lifts the catch 17 from the notch 18 of the bolt and unlocks the latter, engages a side of the notch 13, and moves the bolt, as shown in Fig. 10; and as it disengages the notch, the catch 17 of the tumbler engages the second notch as 18 in the bolt, and locks the bolt. When the key has completed its revolution, and its web registers into the eye 25 and slot 26 in the web lock plate 24, the spring 6, Fig. 3, in the key, being unopposed, snaps the web 8 back into normal position, and the key assumes the position shown in Fig. 6. To make the lock doubly secure, the key may be inserted and turned once again in the manner described. This time it engages the tumbler 19, unlocks the bolt, and moves against the sides of a second notch 13; a bolt is again moved, and locked by the tumbler catching in a third slot 18 in the bolt; and the key, upon returning to registering position, again assumes the position shown in Fig. 6.

It is plain that the web locking plate may be dispensed with, and the web of the key held in operative position by a constant pressure on the key to hold the web open. While means might be embodied in the key to hold the web open, such means render the parts of the key numerous and complicated. The web lock plate seems to be the simplest solution to the problem. However, I do not intend by the above explanation, to be understood as limiting myself to only a web locking plate.

In conclusion, by means of my invention, I provide a lock that cannot be unlocked by a solid key which may be passed through the eye and slot of the plate. For the sake of convenience, I provide a lever 30, and cam 31, shown in dotted lines, by which the bolt may be unlocked from that side of the lock opposite to the key plate, but this feature together with the hand bolt shown, constitute no part of my invention. If desired wards as 34, and pins as 35, may be provided for web 8 of the key, as shown, for example in Fig. 7.

What I claim is:

1. A key having a web pivotally secured to the shank of the key; a plunger in the free end of the key; a link connecting the plunger and the web, all designed so that when the plunger is pressed against a body, as the side of a lock case, it will fully open the web and the relation between the open web and engaged end of the plunger will be such that the web will be in the exact position required for it to be turned and moved into engagement with the bolt for which it is designed.

2. A lock having a back plate, a web lock plate, a bolt, and a key slot; a key having a web pivotally secured to the shank of the key; a plunger mounted in the free end of the key, and to be pushed into engagement with the back plate of the lock; a link connecting the plunger and the web; the length and movement of the plunger, the position of the web lock plate, and of the bolt, being such that when the plunger is pressed against the back plate, to its full extent, the web is wide open and can be turned, free of the web lock to engage the bolt.

In testimony whereof I aflix my signature in presence of two witnesses.

IVILLIAM AGOSTINI.

Witnesses RICHARD P. BORDEN, JENNIE ALCOCK.

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