US939379A - Extension-table lock. - Google Patents

Description

J. A. BARBRAKE.

EXTENSION TABLE LOCK.

APPLIOATION FILED 111113,22, 190s.

Patented Nov. 9, 1909.

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JOHN ALBERT BARBRAKE, OF CANTON, OHIO, ASSIGNOR TO THE SENG COMPANY, OF

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

EXTENSION-TABLE LocK.

Specification of Letters Patent.

Patented Nov. 9, 1909.

To all whom it may concern:

Be it known that I, JOHN ALBERT BAR- BRAKE, a subject of the Emperor of Germany, residing at Canton, in the county Vof Stark and State of Ohio, have invented a new and useful Extension-Table Lock, of which the following is a specification.

The invention relates to a mechanism for connecting and drawing and locking together the separable parts of an extension table or other object having separable abut ting parts; and the general objects of the i11- vention are to provide a lock which, after connecting the separable parts, will draw and hold them together by a direct pull and without any material sliding of one engaging element on the other; also, in which the locking device is applied directly to one of the engaging elements; and, furthermore, in which the movement of the handle of a somewhat elongated operating lever, in manipulating the lock, is reduced to a minimum. These objects are specially impor'- tant in connection with a lock designed to be applied to the separable parts of the top of an extension table, for the purpose of preventing any lateral movement of one sepa` rable part with reference to the other, as they are being drawn together; also, for the purpose of having the lookin device operate positively on the engaging elements to avoid any looseness or springing of in-` tervening connections; and, furthermore, forV the purpose of avoiding an extended movement of the handle of the operating lever whichnecessarily extends from the middle of the table to or near one edgethereof and is, therefore, lusually located in the somewhat narrow space between the ordinary table slides. These general objects and 'other advantages of neatness, adaptability and economy, are attained by the construction, mechanism and arrangement illustrated in the accompanying drawings, forming part hereof, and showing the lock as applied to the separable parts of the top of a divided pedestal extension table, in which'- Figure l is a longitudinal-vertical section of the upper portion of the table,`showing the lock applied thereto; Fig. 2, an inverted perspective view of the operating lpartsvof the lock; and Fig. 8, an under side fragmentary view of the divided parts of the table top, slightly separated, showing the lock in its open or disengaged position thereon in full lines, and in its closed and looked position in broken lines, with an intervenin position of the engaging hook in dotte lines.

Similar numerals refer to similar parts throughout the drawings.

The operating parts of the lock include the hooked arm l, the link 2 and the lever 3, which are preferably mounted on the plate t formed or attached on the under side of one separable part 5 of the table top, preferably 12 of the arm is pivoted to the swinging end of the link 2 by means of the oscillating pivot 18 which is passed through the L- shaped slot 14 formed in the end 15 of the lever, which end intervenes and is adapted to slide between the connected ends of the arm and the link. The other end of the link is connected to the bracket by means of the rock pivot 16, preferably with the intervening washer 17, and the lever is likewise connected to the bracket, eccentricto the rockpivot, by means of the fulcrum pivot 1S, preferably with the intervening Washer 19; and thehandle bar 20 is formed on or attached to the lever and is extended to bring the handle 21 in a convenient and accessible position underneath one end edge of the table top. The depending flange 22 is formed or attached on the plate, parallel with and adjacent to the edge of the top-part to which the plate is attached, and in this flange is provided the guide-slot 23 in which slot the shank of the lockarm is located and adapted'to operate.

4The parts are so proportioned and arranged that when the lever is rotated to the position which, for convenience herein is called the open position, the oscillating pivot is located in the end of the longer longitudinal section of the lock-slot, with the swinging end of the link and the pivoted end of the arm located quite close to the plateflange, in which position the hooked end of the arm is extended outward its maximum distance from the flange and its shank is held at a considerable inclination from the perpendicular thereto by the abutment of the inner edge 24 of the guide-slot against the inner edge l0 of the arm, as shown by full lines in Fig. 3. The engaging post on the opposing part of the table top is so located that when the top-parts are closed toward each other, the post will freely pass the nose 25 of the hook when the same is in the open position described above. Then the engaging post has passed within the line of the engaging face of the hook, the lever is rotated by its handle to swing the pivoted ends of the link and the arm away from the bracket flange, which is accomplished by the sliding of the oscillating pivot in the longitudinal section of the lever-slot. The irst result of this movement throws the hooked end of the arm laterally, to bring the engaging face of the hook in contact with the remote side of the engaging post, as shown by dotted lines in Fig. 3, which movement is controlled by the abutment of the outer edge 26 of the guide-slot against the outer edge 27 of the arm. The hook and the post being thus engaged, a further movement of the lever in the same direction draws the pivoted ends of the link and the arm farther away from the bracket iange, in which movement the locus of the oscillating pivot is so nearly perpendicular to the bracket flange and its curvature so slight, that the lock-arm is drawn substantially longitudinally through its guide-slot and, therefore, the hook pulls against the engaging post in a line substantially perpendicular to the adjacent edges of the top-parts. When the table parts have been drawn tightly together, the oscillating bolt is adapted, by a. further rotation of the lever, to enter the shorter transverse section of the lever-slot and to rest inthe end thereof, in which relation the engaging elements are locked with the table parts tightly closed together, by the abutment of the oscillatingpivot against the shoulder 28 of the leverslot. To unlock and disengage the table parts, it is only necessary to rotate the lever arm in the reverse direction.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. A lock for two separable table parts including a post on one part, a guide on the other part, a link and a lever eccentrically pivoted on the lsame part, there being an L- essere shaped slot in the lever, an arm controlled by the guide: and having` a hook on its free end, and a pivot in the lever-slot connecting the other end of the arm with the link, whereby the link-arm pivot is adapted to bc oscillated by the lever to engage and draw the hooked end of the arm against the )0st, and then to be locked by the shoulder ot the lever-slot. l

2. A lock for two separable table parts including a post on one part, a guide on the other aart, a link and a lever cccentrically pivoteld on the same part, there being a slot in the lever, an arm controlled by the guide and having a hook on its free end, and a pivot in the lever slot connecting the other end of the arm with the link, whereby the link-arm pivot is adapted to be oscillated b v the lever to engage and draw the hooked end of the arm against the post.

3. A lock for two separable table parts including a post on one part, a guide on the other part, a lever pivotcd to the same part and having an L-shaped slot therein, an arm controlled by the guide and having a hook on its free end, a pivot on the other end of the arm adapted to operate in the leverslot, and means for guiding the arm pivot whereby the same is adapted to be oscillated by a rotation of the lever to engage and draw the hooked end of the arm against the post and then to be locked by the shoulder of the lever-slot.

4. A lock Jfor two separable table )arts including a post on one part, a gui e on the other part, a lever pivoted to the same part and having a slot therein, an arm controlled by the guide and having a hook on its free end, a pivot on the other end of the arm adapted to operate in the lever-slot, and means for guiding the arm pivot whereby it is adapted to be oscillated by a rotation of the lever to engage and draw the hooked end of the arm against the post.

5. A lock for two separable table parts including a post on one part, a guide on the other part, a link pivoted to the same part, an arm controlled by the guide and having a hook on its free end, and a pivot connecting the other end of the arm with the link, with means for oscillating the link-arm pivot to engage and draw the hooked end of the arm against the post, and means for locking the parts in this relation.

6. A lock for two separable table parts including a post on one part, a guide on the other part, a link pivoted to the same part, an arm controlled by the guide and having a hook on its free end, and a pivot connecting the other end of the arm with the link, with means for oscillating the link-arm pivot to engage and draw the hooked end of the arm against the post.

7. A lock for two separable table parts comprising' a' posi; on one part, at lever fulf to lock the parts in this relation by entering cume o? thehother par and having an L- the other branch of the slot. s ape s o't t ere'in, an a post-engaging mechanism on the same part having a pivot JOHN ALBERT BARBRAKE 5 thereon adapted to o erate in one branch of Witnesses:

the slot to engage t e mechanism With the RUTH A. MILLER, post and draw the table parts together, and JOSEPH FREASE.

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