Patent GB-190627637-A (GB)
Title: Improvements in Locks of Every Description.
Inventor: MEWS FRIEDRICH WILHELM
Filed: 1906-12-04
Granted: 1907-10-10
Abstract: 27,637. Mews, F. W. May 19, [date applied for under Patents Act, 1901]. Locks, key; padlocks.- The lock casing is made in one piece with a single opening ; the bolt and locking-mechanism are so arranged that they can be inserted into the casing through the opening, a removable cover to the casing being there by obviated. In the padlock shown in Figs. 1 and 3, the shackle 1 is locked in the closed position by spring-controlled sliding bolts 6, mounted on the shank 2 of the shackle and adapted to engage recesses 5 in the casing. The bolts 6 are operable by a pin key 8 which arranges them under the opening in the casing so that the shackle can be pulled upwards. The motion of the shackle is limited by the shoulder 10 on the case. In assembling the parts, the bolts 6 are arranged on the shank 2, and the whole is then inserted into the casing, the bolts immediately springing out under the shoulder 10 and preventing subsequent removal. Any number of bolts 6 may be used, and the parts 12 of the casing may be stepped, so that these have to be pushed various distances by the key ; any bolt that is pushed too far engages with the opposite recess 5, thus preventing withdrawal of the shackle. In a modification, the bolts 6, instead of being operable by a pin key, are provided with ordinary locking-levers and adapted to be operated by ordinary bitted keys. In the modification shown in Figs. 7 and 8, the bolts 6 are provided with slots 25, which co-operate with projections 32, 33 on the plate 22, which is held in the recess 35 in the casing. In assembling the parts of this lock, the shackle 3 and bolts 6 are inserted into the case with the plate 22 in the recess 28 of the shackle and the projection 32 passing into a slot in the plate 27. As the shackle is forced down, the bevel on the projection 32 engages the side of the slot in the plate 27 and forces the plate 22 into the recess 35 of the case, where it is held by the projection 32 which has been removed from a position opposite the slot in the plate 27, and by the heel 29 on the plate 22: In Fig. 10 is shown a box lock, the case of which is formed from a sheet of metal bent into U -shape ; the bolt 47 is provided with locking-bolts 6, which slide between guides 48 bent up from the metal blank forming the bolt and are adapted to co-operate with the projection 34 struck up from the side of the case. The bolt can be used with its engaging end at the open end of the case, as shown, or with it passing through an aperture in the end plate 40, the face-plate for the edge of the door being screwed on either end, as desired. In the modification shown in Fig. 18, the plate 66, carrying the projections 65 with which the locking-bolts (not shown) are adapted to co-operate, is secured in place by pins, screws, or rivets 69, the inner ends of which are adapted to be covered by the bolt when the padlock is locked, so that the mechanism can only be removed from the casing when in the open position. This provision is also made in the lock shown in Fig. 20, the plate 22 carrying tho projections 34 being held in position by the free end 71 of the shackle, which cannot be opened until after the bolts 6 have been raised by the key. A modification of this is shown with a sliding shackle. In the padlock shown in Fig. 17, the bolts 6, engaging with pins 62 on the casing, are provided with stepped slots 25, so that there is a double unlocking action. The key 8 first sets the bolts so that the pins 62 can enter the slots 25 and the shackle can be pulled partly out, and then the same or a different key is used to press the bolts 6 in further, until the pins 62 are opposite the slots 64, after which the shackle can be completely disengaged. Any number of bolts 6 may be used in each form of the lock, and variation may be given to the keys by having these bolts of different thicknesses, or by means of distancepieces placed between them. Means may also be provided by which the key for any particular lock may be changed from time to time. For this purpose, the bolts 6 are made in two parts, as shown in Fig. 16, the one with the co-operating slot 25 being adjustable in the other part 6<a> which is to be acted on by the key. In those forms in which a rotatable key is employed, a rim 38, Fig. 12, is stamped out from the casing to serve as a guide for the key, a notch 39 being cut in the key bit to accommodate it.