US2082013A

US2082013A - Folding table

Info

Publication number: US2082013A
Application number: US19541A
Authority: US
Inventors: Dewey S Lewis
Original assignee: ADLER Manufacturing CO Inc
Current assignee: ADLER Manufacturing CO Inc
Priority date: 1935-05-03
Filing date: 1935-05-03
Publication date: 1937-06-01
Anticipated expiration: 1954-06-01

Description

June 1, 1937. D. s. Lewis 2,082,013

' FOLDING TABLE Filed May 5, 1935 I l l Patented June l, i9377 UNITED sTArEs ztsaoi Para erica FOLDING TABLE Application May 3, 1935, Serial No. 19,541

7 Claims.

My invention relates to tables equipped with mechanisms organized to provide a pivot and locking means for each individual supporting leg, whereby the latter can be folded for the closed 5 position or extended in terms of the top for the open position and then secured in either of the selected positions.

The primary object of the invention is to provide sturdy hinges of simple structure for the ly legs of tables known in the furniture industry as folding or card tables.

An important object of the invention is the embodiment of principles, structure and matef; rials to enable the uninitiated user to readily un- 15 derstand the operations incident to extending the legs or opening the table for use, also for folding or closing the legs for storage.

A still further object of the invention contemplates an organization of metal and wood parts having superior enduring mechanical properties, the component parts of which can be readily produced expeditiously, assembled and iinished to constitute the nal product.

With the foregoing and other objects, which g'will be revealed as the description of the details of the construction proceeds and hereinafter claimed, it must be understood that changes from the selected embodiment of my inventionI can be indulged without departing from the 30 scope of my invention.

Drawing Figure l is a fragmentary elevational View of the upper section of a table leg attached to a 3 portion of a top to illustrate the former in full lines in extended or open position, the dotted lines indicating the folded or closed position.

Fig. 2 is a similar view taken at right anglesv Structure 5() Numeral I0 indicates the top portion of a leg of a folding table in extended position. II is a yokel secured by screws I4 to flange I 2 which with the top slab I3 is to be regarded herein as the 55 table top. The leg is pivotally mounted on the shaft I 5 which is suitably secured in holes, preferably riveted.

Coincident with the blanking operation for producing part II as shown in Fig. 3, tongue III is also cut as indicated. A subsequent operation 5 shapes the blank into the yoke as illustrated in Fig. 4 with the tongue I i i having been orientated through 180, and the inner faces I i 2 of arms I Ill forced into parallel relation to receive the parallel faces of leg i0, said faces iI being corelated to contribute to a desired free but iirml swinging action. Hole Il@ in tongue III is provided to receive a screw I4 while ear M5 received another screw M. For assembly, the leg is iirst equipped with the hardware, dealt with herein,

when it is transferred to the` table top and secured in working relation thereto by screws Irl. Numeral I represents a sleeve driven into the leg and has slidably mounted therein a hollowy plunger II in which is disposed compression spring i8, the bottom endof which is fixed into the reduced portion iS of the sleeve. The arms 200 of 20 are pivoted onto the leg by shaft 2l which is located in xed spaced parallel relation to shaft I5 to effect a denite operating relation between the yoke and latch arm. The plunger and spring are provided and located to normally press surface 203 or arcuate lobe 2EME of the latch arm against-the cam or tracky IM or arcuate notches II of yoke II.

In Figs. 1 and 5 lobe 204 is eccentric to axis 20|.of shaft 2I to produce a wedging action with notch II'I (Fig. 1) which is concentric to said axis. A similar vwedging action can be effected by reversing the relation of these faces, i. e. notch 5:5

Ill is made eccentric and lobe Zilli concentric to axis 20| as shown in Fig. 7. In each case the travel of the locking lever is stopped by the wedgrsteel are not formed with true surfaces or even consistent irregular ones, all of which is recognized by producers of stamped sheet metal. When rst assembled spring I8 forces cam surfaces, i. e., one or both of same, into engagement with arcuate notches II1, usually for a single tion.

point contact. Repeated operations as in normal usage, develops the contacts into a long line bearing for one or both cams and then into enduring surface contacts for both sets of cam locks. While the irregular areas and burred edges of the bearings are Wearing to more durable surfaces the eccentric relations of the faces of the cams and notches compensate for all the Wear as Well as irregularities and thereby prevent a loose and rickety condition from developing.

Operation To open the table when legs Ill are lodged in closed position as indicated by the dotted position in Fig. l, each leg is drawn outwardly, rotating substantially D on shaft I5 until it reaches the full line position Where a portion of lobe 204 is forced into notch II'I by spring i8 and plunger I'I. At this position the leg is firmly secured, the Wedging action referred to hereinbefore-having been organized to prevent any lost motion or looseness and to compensate for Wear of the main bearing and the elements constituting the latch. Pressure exerted on latch 20 by the human hand releases the lock when the leg can be readily returned to the dotted or closed posi- As this pressure is released the spring forces the lever back against cam or track II4, or returns the cam faces '204 to engagement With notches II'I, which in turn forces the back side of leg I0 (as vieWed'fro'm Fig. 2) against the yoke I I and effects the Wedging action mentioned heretofore.

I claim:

l. A folding table comprising a top and a leg swingably connected thereto by a pivot mounted in a yoke secured to the top, said yoke having a pair of arms which embrace correlated faces of the leg, the edge of each arm being fashioned v with a cam face terminating in a concave notch, a spring pressed locking lever pivoted tov the leg and equipped vvithl a pair of convex cam faces Which cooperate with said notches to secure the leg in the extended position, the free end of said lever being pressed .outwardly by a spring lodged i in said leg.

2. A folding table comprising a topi and a leg swingably connected thereto by a pivot mounted' in a yoke secured to the top, said yoke having a pair of arms which embrace corelated faces of the leg, the edge of each arm being fashioned With acam face substantially concentric to said pivot and terminating ina concave notch.- a spring pressed locking lever pivoted to the leg and equipped with a pair of individual camk faces concentric to the pivot ofthe locking lever and each of said faces cooperating with its related notch to secure the leg in the extended, position.

3. A folding table comprising a top and a leg swingably connected thereto by a pivot mounted in a yoke secured to the top, said yoke having a pair of arms formed with substantially parallel faces which embrace corelated faces of the leg, the edge of each arm being fashioned with a cam face substantially concentric to said pivot and terminating in an arcuate notch, a spring pressed locking lever pivoted to, also embracing the leg and equipped With arcuate cam faces concentric to the pivot of the locking lever and organized to cooperate with said notches to secure the leg in the extended position, said notches being eccentric to the pivot of the locking lever.

4. A folding table comprising a top and a leg swingarbly connected thereto by a pivot mounted in a yoke secured to the top, said yoke having a pair of arms which embrace corelated faces of the leg, the edge of each arm being fashioned with a cam face and terminating in a concave notch, a spring pressed locking lever pivoted to, also embracing the leg and equipped with cam faces eccentric to the pivot of the locking lever which mesh with said notches to secure the leg in the extendedk position, said notches being concentric tov said pivotto effect a Wedging action between said faces and the notches.

5. A folding table comprisingl a topy and a leg swingably connected thereto by a pivot mounted in a yoke secured to the top, said yoke having a pair of arms formed with substantially parallel faces which embrace corelated faces of the leg, the edge of each arm being fashioned with a cam face concentric to said pivot andv terminating in an arcuate notch, a spring pressed locking lever pivoted to the leg and equipped with arcuate cam faces eccentric to the pivot of the locking lever and organized to cooperate With said notches to secure the leg in the. extended position.

6. A folding table comprising a top and-a leg swingably connected thereto by a shaft mounted in a yoke secured to the top, said yoke having a pair of arms which embrace corelated faces of the leg, a spring pressed locking lever pivoted to the leg and-having concentric arcuate cam faces formed in the edge of same, the edge of each arm of said yoke being formed with a cam which terminates in a deep notch to receive the faces of said lever and form a stop for the latter and thereby secure the leg in the extended position.

7. A folding table comprising a top and a leg swingably connected thereto by a shaft mounted in a yoke secured to the top, said yoke having a pair of arms Which embrace corelated faces of the leg, a spring pressed locking lever pivoted to the leg and equipped With arcuate cam faces,`

the edge of each arm of said yoke being formed with a cam which terminates in a deep arcuate notch to receive .only a portion of the faces of said lever and thereby effect a Wedging action when in the extended position.

DEWEY Si. LEWIS.