US1240530A - Manufacture of locks. - Google Patents

Description

E. P. BAIHD.

MANUFACTURE 0F LOCKS.

APPLICATION HLED Nov. 5. 1915.

Patented Sept. 18, 1917.

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'key with any UNITED STATES PATENT OFFICE.

EDWARD '.P. BAIRD,

OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MANUFACTURE OF LOCKS.

Specication of Letters Patent.

Patented Sept. 18, 1917.

Application led November 5, 1915. Serial No. 59,819.

Illinois, have invented certain new and us'eful Improvements in the Manufacture .of Locks, of which the following is a description.

My invention belongs to that general class of devices known as locks and the manufacture thereof, and particularly to that type of lock which may be termed a plate tumbler lock. It is customary to vary the construction of locks and keys so that any particular lock can be operated only by its individual key, or where desired, by a master key adapted to control a plurality of locks. The invention has among its objects the production of a simple, convenient, eicient and satisfactory lock of the kind described in a comparatively simple manner, which lock is constructed of a minimum of parts, and more particularly among the objects is the inexpensive manufacture of a lock suitable for innumerable key changes, and which may be easily mastered, if so desired. The ease with which the lock may be constructed, each lock having a different key, or the same number of them for a master key, is one of the desirable features of the invention.

To this end my invention consists in the novel construction, arrangement, combination of parts and construction thereof herein shown and described, and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like or corresponding parts,

Figure 1 is a side elevation of a complete lock;

Fig. 2 is a view in elevation of the inner end of the spindle with its plates inserted before cutting same olf;

Fig. 3 .is a side elevation of the spindle and plates with the key in position;

Fig. 4 is a sectional view through a p0rtion of the spindles and plates, the key inserted with the projecting ends, with the plates cut off so that the ends aline;

Fig. 5 is a similar'view with another key inserted;

Fig. 6 is a sectional view through the spindle with the key in place, the plates proyecting beyond, the spindle, cut off, with key shown in Fig. 4 inserted,

Fig. 7 is a sectional view similar to Fig. 6, including the barrel into which the spindle is inserted and associated parts of the lock, a key similar to that shown in Fig. 5 inserted;

Fig. 8 is a sectional view taken substantially on line 8, 8 of Fig. 7

Fig. 9 is a view lsimilar to Fig. 8, the spindle rotated and the key withdrawn;

Fig. 10 is a reduced sectional view taken substantially on line 10, 10 of Fig. 7; and

Fig. 11 is a view of one of the plates.

Referring to the drawings, in which one form of the lock is shown, 1 represents a lock or latch bolt operatively connected with a spindle 2, so that when the spindle is rotated, the bolt 1 will be thrown in or out of locking position, as the case may be. `Two forms of key are shown, key 3 being in place in Figs. l, 3, 4v and' 6, the other key 13 in Figs. 5 and Y7. A barrel 4 is provided to receive the spindle 2, and is carried by a casing part 5, in which the bolt 1 is arranged. The spindle is also provided with a keyway 6 at the front and rear thereof, the front keyway being more particularly described hereafter.

The spindle 2 is also preferably slotted for a portion of its length as indicated at 7 and of a size to receive the tumblers 7, which are each formed with a' keyway 8 therethrough, as most clearly shown in Fig. 11. In constructing the lock it may be mentioned that with this particular type of lock OF CHICAGO, ILLINOIS, ASSIGNOR TO '.ll'rIllli KING- LOCK COMPANY. I

-keys, this being the most simple and economical way of constructing the lock. The key 3 is provided with a shank 10 and the edges 11 preferably arranged with a series of undulations, which on the illustrative keys are shown parallel. The plates 7, as formed are of greater length than the diameter of the barrel or spindle 2, and are inserted in place substantially as shown in Fig. 3. The shank 10 of the key 3 is then inserted in the keyway 6, causing the plates to take positions, for example, substantially as shown in Fig. 3 referred to. The ends of the plates 7 are then suitably cut oif, either by turning, or in any other preferred Way, so that they are alined at their ends and substantially conform to the contour of the barrel 2, and entirely confined within the spindle, as shown in Fig. 4. The spindle is then inserted in the barrel 4 and the same operatively connected with the bolt 1. The barrel 4 is provided with a slot or' groove 16, preferably on opposite sides thereof, as most clearly shown in Figs. 8 to 9, so that when the key is in place the spindle may be rotated in the barrel, but when the spindle is turned so as to aline the plates with the slot 16 and the key withdrawn the spindle will be locked against rotation by the plates. As is obvious, cutting off the plates to lit the key determines the relative positions of the apertures 8 in the plates, so that the plates will only be alined when the same, or an identical key is inserted. When only a primary key is desired the lock is complete as described.

Where it is desired to have the lock with any desired other locks controlled by a master key, a master key is provided. I have shown, for example, a master key 13, having a shank 14 with the edges 15 differing in contour from the edges of the shank 10 of key 3. However, with a key of this design the plates are not alined at both ends, as shown in Fig. 5, or perhaps at either end, this depending on the contour of the master key. The plates are then cut 0E again so as to aline at their ends where they would have otherwise projected beyond the spindle. If now the spindle is inserted in the lock barrel 4, as shown in Fig. 7, and the key is inserted, the plates will be moved substantially to the position shown in Fig. 6, but the vsame not projecting beyond the spindle, the spindle may be turned in the barrel 4. Likewise, wher. the key 13 is inserted, as shown in Fig. 7 the plates are not projected beyond the spindle. This method or process of constructing the lock may be repeated as to other keys, so that a lock might have a master key. In this wayeach individual lock would have its in-V dividual key, and a portion or all of the locks could be actuated by a master key, or a portion of the locks could have one master key and a portion another, and all have a key that would be a common master key, and actuate any, and so the operations could be continued. It will be noted that in a construction of this kind the lock in itself is not varied in its essential details in mastering, but merely the lock constructed in a lsimple manner, to-wit, again cutting olf the plates the same is mastered without adding an additional element except a master key.

I have also shown a built up keyway constructed of plates 12 in Figs. 6 and 7. As most clearly shown in Figs. 1, 7 and 10, the spindle 2 is secured to a plate 18 formed to engage the shoulder 19 of the inner barrel and provided with an extension or lug 20 adapted to coperate and work in a slot 21 with the bolt 1. 'Ihe plate 18 may be very when the other key for positively throwing the plates out of alinement when the key is withdrawn after.

the barrel has been turned into the position shown in Fig. 9. It happens that the keys shown in the gures with the upper ends of the plates shown in Fig. 6 are alined when one key is inserted, and the bottom ends is inserted; that is, as the devices are shown in the drawings, but it is, of course, obvious that this depends entirely on the contour of the keys and that either of the keys shown might be the master and the other the primary, and that the I have shown a spring operation might be performed with either key being used rst.

The advantages of the construction have been previously pointed out, to-wit the sim plicity and low cost of manufacture, together with the extreme sensitiveness of the lock, as one plate out of proper position would prevent the lock from being actuated; and the many other advantages will appear to those skilled in the art. I am aware that various modifications and changes in the method of manufacture may be adapted from the disclosures herein given.

Having thus described my invention, it is obvious that various immaterial modilications may be made in the same within the scope of the appended claims without departing from the spirit of my invention; hence, I do not wish to be understood as limiting myself to the exact construction, arrangement or combination of parts herein shown and described, or uses mentioned.

What I claim as new by Letters Patent is:-

l. The herein described manufacture of locks, consisting in associating a plurality of tumblers and inserting a key in the tumblers, then cutting olf the ends of the tumblers so that they aline at the ends, then withdrawing the key and inserting a different key in the tumblers, and then again cutting off the ends of the tumblers.

2. The manufacture of plate tumbler master locks of the kind described, operable by a common key, consisting in inserting a suitable master key in the locks and cutting ol" the tumblers at lthe ends, whereby the same will clear a coperating engaging part when the key7 is in the lock.

3. The herein 'described manufacture of locks, consisting in associating a plurality of suitably formed plate tumblers in a slotted spindle, said tumblers being of a length to project beyond the spindle, then inserting a key to adjust the tumblers and cutting olf and desire to secure.

the tumblers flush with the spindle, whereby when the spindle is inserted in a suitable barrel arranged for engagement with said tumblers, the tumblers will be moved out of or in operative engagement with the barel upon the insertion or withdrawal of the 4. The herein described manufacture of locks, consisting in associating a plurality of plate tumblers and arranging them with a suitable key, then cutting away portions whereby when the same are inserted within a suitable spindle the same will be entirely contained within the eonines thereof, then again arranging them and cutting away portions whereby when a dissimilar key is einployed to rearrange the tuinhlers they will also be entirely contained within the confines of the spindle.

En testimony whereof, l have hereunto signed my name in the presence o' two subscribing witnesses.

EDWARD P. BAKED.

Witnesses:

ROY HILL,

1 Coe-ea

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