US1406289A - Locking mechanism - Google Patents

Description

J. F. SCHAEFER.

LOCKING MECHANISM.

APPLICATION FILED NAILS-31.1919.

LQQQQgQ, Patented Feb. 14, 1922.

I tumbler iiti " of Fig. 8;

UNITED STATES PATENT GFICE. X

JOSEPH F. SCHAEFER, OF SHAKER HEIGHTS VILLAGE, OHIO, ASSIGNOB TO THE VAN 0F CLEVELAND, OHIO, A CORPORATION OF OHIO.

BORN IRON WORKS,

LOCKING MECHANISM.

Specification of Letters l atent. Patented Feb, 14, 1922,

Application filed March 31, 1919. Serial No. 286,417.

T 0 all whom it may concern:

Be it known that I, J OSEPH F. SCHAE-FER, a citizen of the United States, residing at Shaker Heights Village, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Looking Mechanism, of which the following is a specification.

This invention relates to locks and par ticularly to those of the pin tumbler type.

The pin tumbler construction is utilized very extensively in connection with locking mechanism but heretofore the pin tumbler barrel itself has been utilized for throwing the locking mechanism by rotating it with a key. It is also customary to arrange the pin and plungers between the pin tumbler barrel and cylinder in a manner such that the key is necessary in the operation of the pin tumbler barrel. The object of the present invention is to arrange the mechanism so that a key must be used for releasing the pin barrel when moved to unlocked position, after which the key may be withdrawn and the pin tumbler barrel returned to locked position without the use of the key.

Further details of the invention will more fully and at large appear in the following description, drawings and claims.

Referring to the drawings, Fig. 1 is aview showing a type of locking mechanism employing my improved pin tumbler control and applied to a filing cabinet, parts of the cabinet being broken away to clearly illustrate the device; Fig. 2 is a front elevation of the front edge of the side wall of the cabinet showing the pin tumbler barrel and cylinder mechanism applied thereto; 3 is a side elevation of the pin tumbler barrel and cylinder mechanism with the former in locked position; Fig. 4c is a similar view with the pin tumbler or barrel in unlocked position; Fig. 5 is a section upon the line 5-5, of Fig. 2; Fig. 6 is a section upon the line 6-6, Fig. 7 is a detail view, partly in section. showing the locking lugs on the side of the drawer and the locking tongue on the locking bar; and Fig. 8 is a top plan view showing in plan and in dotted lines the arrangement of the two groups of plungers.

lin the drawings, 1 represents the side of a filing cabinet presenting a narrow flat front edge 2. Slidably mounted within the cabinet and suitably supported against the side 1 is a vertically disposed bar 8 having tending arm 10 having a flange tongues 4 extending from one side thereof and out of the plane of the bar, one of said tongues being shown in Figs. 1 and 7. These tongues are adapted to engage behind drawer lugs or blocks 5 secured to the sides 6 of the drawers. The arrangement of the bar 3, tongues 4 and lugs 5 is such that when the bar is elevated the tongues 4 are in position such that they are in the path of the lugs or blocks 5 and prevent the movement of the drawers if closed and permit the closing of a. drawer or drawers by the lugs or blocks 5 sliding past the tongues which yield outwardly for this purpose. The bar 3 is provided with a pin 7 near its upper end engaging in an arm 8 of a bell crank lever, which is pivoted to a pin 9 secured to the side of the cabinet. This lever is provided with a downwardly ex- 11 provided with an opening 12 for a purpose to be described. It will be is rocked in aclockwise direction the bar 3 will be elevated and the tongues 4 will be in the path of the lugs or blocks 5. When the lever is rocked in a counter-clockwise direction the tongues 4 are out of the path of these blocks or lugs so that the drawers may be opened freely.

The bell cranklever above described is operated and controlled by a pin tumbler and cylinder structure and it consists of a cylinder 13 having a flat portion or pad 14 provided with suitable threaded openings 15 for receiving screws 16 by which the cylinder is secured to the cabinet. This cylinder projects through a suitable opening in the front edge of the side wall, as shown in Fig. 2. The cylinder 13 is also provided with an eccentrically disposed opening 1'? adapted to receive the in tumbler barrel as will appear. The cylinder is still further provided with a group of openings 18 which are radial with respect to the opening 17'. These openings 18 receive springs 19 and plungers 20 of usual construction. The group of openings 18, and the plungers mounted therein, are to the rear of the cylinder and toward the front the cylinder is provided with a similar .series of openings 21 receiving springs 22 and plungers 23 larger in diameter than the plungers 20 for a purpose which will appear. The cylinder is still further provided with a portion 24 as shown in Figs. 3 and 4, which is concentric with the opening 17 and through this wall seen that when the lever there is a spiral slot for a purpose to be described.

Slidably and rotatably mounted in the opening 18 is a pin tumbler barrel 26 having the usual key slot 27 therein opening out through the front. This pin tumbler barrel is further provided with a flange or bead 28 seating in a suitable opening in the front face of the cylinder and limiting the rearward movement of the pin tumbler barrel. The pin tumbler barrel is provided at its inner end with an annular recess 26 adapted to receive the arm 10 of the bell crank lever. and engage in the opening 12 thereof;

Extending radially into the pin tumbler barrel 26 and cutting the key slot 27 are pins 29 of the usual construction and adapted to register with the opening 18 and the openings 21 when in certain positions. The pin tumbler barrel is still further provided with a pin 30 secured in the side thereof andengaging in the spiral slot 25 and the arrangement of this pin and slot is such that when the pin tumbler barrel is in its extreme in. ward position, as shown in Fig. 3, the pin 30 is at the inner end of the slot 25 when the pins 29 will align with the openings 18 and the plungers therein. When the pin tumbler barrel is moved outwardly, however, by rotary longitudinal movement, the pin 30 is at the outer end of the slot 25 and the pins register with the openings 21. When in this latter position the key may be withdrawn by reason of the fact that the pins 29 may move out freely against the plungers 23 but after withdrawal of the key these same tary and sliding movement for the locking i and unlocking operations, co-operating key actuated plungers and pins between the cylinder and barrel and means for moving said key barrel outward beyond the cylinder when unlocked and for returning said barrel to locked position when pushed in;

2. The combination with a cabinet wall of a lock flush with the outer face of said wall, and comprising a cylinder, a key receiving barrel having a rotary and sliding movement for the locking and unlocking operations, cooperating key actuated plungers and pins between the cylinder and barrel, means for releasing the key when the barrel is in unlocked position, means permitting the move ment of the barrel from unlocked to locked position without the use of the key, and means for moving said key barrel outward beyond the cylinder when unlocked and for returning said barrel to locked position when pushed in.

In testimony whereof I affix my signature.

JOSEPH F. SCHAEFER.

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