US172899A - Improvement in locks for drawers - Google Patents

Description

'distance.

PATENT QFrrc-RQ WARREN H. TAYLOR, or STAMFORD, CONNECTICUT.

IMPROVEMENT IN LOCKS FOR DRAWERS,'&0.

. Specification forming part of Letters Patent No. 172,899, dated February 1, 1876; application filed December 9, 1875.

To all whom it may concern:

Be it known that I, WARREN H. TAYLOR, of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Dra-Weror Cabinet Locks 5 and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make 7 and use it, reference being bad to the accoma vertical section, of my improved lock. Figs.

1V to VIII are details of the same, and Fig. IX represents the key, like letters of reference mdicating like part in all the figures.

The general construction of my improved lock is as follows: X is the back plate of the lock. Y is the cap formed with a barrel, Z. A, Fig. IX, is the key, having an end pivot, a, guide-notches a a bits a a and wings a a, both edges being alike. B Bare double tumblers vibrating in opposite directions. For economy I pivot them upon one fixed center, b and b b are the usual tumbler-springs. O, Fig. VIII, is the talon-lever, which turns on a stationary pivot, 0 the free or vibratory end 0 of which fits into the talon d of the bolt D. The inwardly-curved edge of the lever end 0 forms the intermediate talon against which the key-wing a strikes, throwing the bolt the full The bolt D has the usual fence d for engagement with the tum blcrs.

Fig. VI represents the double tumblers closed. Fig. VII represents them fully open.

E, Fig. 111, is the guide-disk. (Shown in elevation, Fig. IV.) It is secured in the outer end of the barrel Z, and capable of rotation therein, and its key-hole conforms to the section of the key. The barrel Z is bored to form the cylinder or stationary guide 2 for guiding the key in its sliding motion toward and into the end bearing an, and in this cylinder zis formed the divided ring F, (shown in front-elevations, Fig. V,) with the disk E removed.

E, and through the vertical slots, separating the half-rings F, its pivot end a, being guided by the fixed longitudinal key-guide or cylinder 2 into the bearing an. The notches a a 'then coinciding with thecut ends of the half-rings, the key can turn a half-revolution either way, for lockin g or unlocking, and during such halfrevolution the half -rings engage with the notches a a and prevent the withdrawal of the key until it is again vertical, and the bolt is fully in or out. In the act of locking, the key, on being turned a quarter revolution in the direction of the arrow, Fig. VIII, reaches the position there shown. At this point the bits of a being horizontal, fully open the tumblers, and the fence at can escape, as in Fig. VII. Simultaneously with the said quarterturn of the key its wing a by impact upon the talon-lever O, has carried the latter upward to the horizontal position, half throwing the bolt D, as shown in FigsJVII and VIII. In the succeeding quarter-turn the key again becomes'vertical for withdrawal, as in Fig. VI, leaving the tumblers closed beneath the fence d and the bolt D looked, as in Fig. I. The backward half-revolution of the key effects the aforesaid movements in reverse order for unlocking.

In the said operations of lockin g and unlocking, the key is perfectly guided in its semi-rotatory axial motion and confined to its work by the end bearing m and guide-disk E, so that I dispense with the plug or rotatory cylinder heretofore used in looks of this class which have sheet-metal keys. The plug thus rendered unnecessary and dispensed with is, in other locks of this class, slotted lengthwise to receive the body of the keyand rotate therewith in the barrel. This plug necessarily inclos'es. the key on one side, requiring a correspondingly-larger diameter or working space within the barrel.

My invention, by dispensing with the plug, reduces the working diameter of the cylinder 2 to the bare width of the key, efleeting fur-.

ther economy in materials and labor, and, by compactness, reducing the cutting away or removal of Wood in attaching the lock to adrawer or other article to which it is to be applied. Although thus reducing the diameter of the guide-barrel and the width of the key, I still secure the long-throwing action of a broader key on the bolt by employing the intermediate talon-lever hereinbei'ore described.

Having described my invention, whatI claim as new, and desire to secure by Letters Patent, is as follows, viz:

1. Alock constructed for aflat or plate key, the said lock having at one end of its keyway a rotary guiding-disk, and at the other end thereot'a fixed hearing or center, both on the same axial line, when constructed substantially as and for the purposes specified.

2. In a lock constructed for a flat or plate key, the combination of a rotary guiding-disk at one end of the keyway of the said lock, a

stationary hearing at the other end, and interposed between the said guiding-disk and said bearing a fixed longitudinal key-guide, when Witnesses:

JOHN HEINs, E. STOGKWELL.

Images