US957705A - Padlock. - Google Patents

Description

A. NERHAPT.

PADLOGK. APPLICATION FILED fBB.,19oa.

957/3705. Patented may 1o, 1910.

j u staf-ras BEST AVAILABLE COPY ANTON NERHAFT, OF BUDAPEST, AUSTRIA-HUNGARY.

PADLOCK.

Specification of Letters Patent.

Application filed February 8, 1908.

Serial No. 414,953.

vertical section showing the movable plates:

in position when the shackle is withdrawn: Fig. 2 a horizontal section of one form of the improvedlock. Fig. 3 shows the key for the same: Fig. 4 shows the shackle in side elevation: Fig. 5 is an end view of the same: Fig. 6 shows a base plate in plan and elevation: Fig. 7 shows a locking plate in plan and elevation: Figs. 8 and 9 show a modified construction of the lock and the key.

In the casing 2 of the padlock, arranged in a preferably oval case 1 are arranged movable locking plates 3 shown in Fig. 7 lo cated one above another and separated from one another by fixed plates 4. The plates 3 are arranged on the plates 4 in such manner that the shoulders 5 of the locking plates engage with projections 6 on the plates 4 (Fig. 2) in the manner hereinafter described. The plates 4 are provided with circular apertures 8 for guiding the two ends of the shackle 7. Each plate 3 has a longitudinal slot 9 which at the places where the shackle 7 passes through has segmental parts 10 cut out corresponding to the size of the shackle. The longitudinal slots 9 are of uniform length in the various plates but in each plate are not symmetrical about the central line A-B (Fig. 7) but are transposed or staggered either to the right or to the left of the same. If, therefore, the various plates 3 are arranged one above another the slots 10 will not be in register (Fig. 1) In order to bring the slots 10 into register the plates 3 must be shifted in horizontal planes so that the transversemedian line of the plate does not coincide with the transverse median line of the slot. On the shackle 7 which is of the same diameter as the slot 10 notches 11 are provided on both sides (Figs. 4 and 5) so that the plates or the inner edges of the slots 9 engage the notches 11 and prevent the withdrawal of the shackle. lVhen the plates 3 are in a position in which the perforations 10 and 8 are in register the shackle 7 can be its free end a lug 19.

freely inserted. In order to move the plates 3 into this position a key 12 is used the bitsI 13 of which are of a length corresponding tc Patented May 10, 1910. A

the desired movement. When this key is i."

.serted through the opening 14 in the casing 1 the bits 13 come against the plates 3 corl responding to the same and move the samel back until the key body comes against the plates 4. Thus the shackle 7 can beinse'rted` in the lock. Each of the locking plates is' provided with spiral springs 16 bearing at one end on the projections 6 on the plates 4 and at the other end on the shoulders 15 or the plates 3. If the key is withdrawn the springs 16 shift the plates 3 so far that the shoulders 5 coincide with the projections on the plates 4. The free movement of the plates under the action of the spiral spring 16 is not prevented by the shackle l7' as the same is provided with notches 11. The withdrawal of the shackle is however prevented by the inner edges 17 of the slots 9 which as mentioned engage the notches in the shackle.

Fig. 8 shows a modied form in which the@ to the bottom of the casing is hollow and contains in its bore a helical spring 204 If the key is inserted it moves the locking plates into the correct position and th(` shackle 7 is released and the compressedy spring 20 raises the same out of the lockl casing. In order to prevent complete re-f moval of the shackle, the under end of the same is provided with a flange 22.4 In orde] to retain the key in the key hole after its insertion under the last of the plates 4 2 blade spring 18 is arranged which has or The key shown ir Fig. 9 has also a lug 21. When the key has been inserted and the shackle has beer withdrawn the spring 18, previously de pressed by the shackle is released and en gages with its lug 19 behind the lug 21 o1 the key and prevents the same from falling out, the locking plates being held in posi tion. If the shackle is inserted its end de presses the spring 18, the key isreleased an( purpose i?" is pressed out by the plates 3 returning intr key. The combinations are given by altering the number of locking plates and the position of the slots 9.

Having described my invention what I claim and desire to secure by Letters Patent of the United States is l. In a safety lock the combination with a casing of a shackle attached to said casing said shackle being formed with notches, fixed plates secured in the interior of said casing, movable plates interposed between said fixed plates, said xed plates being `-rmed with orifices and said movable plates having orifices out of line with each other and connected by slots, said orifices serving to receive said shackle, said movable plates adapted to be moved longitudinally in one direction through varying distances under the action of a key, and a spring tending to move the movable plates in the opposite direct-ion.

2. In a safety lock the combination of a casing, of fixed plates mounted in said cas ing and formed with oriiices, movable plates interposed between said fixed plates and formed with orifices out of line with each other and connected by slots, a tubular shackle one shank of which is shorter than the other, a helical spring mounted in the longer limb of the shackle and interposed between the same and the casing, and a blade spring fitted below the plates and provided with a lug adapted to be engagedby a lug on the key, as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ANTGN NERHAFT.

Witnesses:

. ERNEST MILLER,

THEO. A. GAsoUoHI.

BEST Mamani COPY

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