US2010221A

US2010221A - Extension table

Info

Publication number: US2010221A
Application number: US718544A
Authority: US
Inventors: Cooper Joseph
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-04-02
Filing date: 1934-04-02
Publication date: 1935-08-06
Anticipated expiration: 1952-08-06

Description

Aug. 6, 1935.

J. COOPER EXTENSION TABLE Filed April 2, 1934 2 Sheets-Sheet 1 'INVENTQR ATTORNEY Aug. 6, 1935. J. COOPER 2,010,221

EXTENSION TABLE Filed April 2, 1954 2 Sheets-Sheet 2 INVENTOR l w E ne nu AWLNLIIQ V M k m ATTORNEY Patented Aug. 6, 1935 UNITED STATES PATENT OFFICE Joseph Cooper, New York, N. T Application April 2, 1934, Serial No.

3 Claims. (Cl. 311-41) The object of the present invention is to provide an extension table comprising a plurality of top members adapted to lie one above the other when the table is closed and which are so supported as to have relative outward movements, without mutual interference, in order that the table may be extended with the top members, when two are employed. abutting in a line centrally of the supporting frame. 7

The invention relates particularly to the means by which the movement of the top members is controlled.

The invention will be described with reference to the accompanying drawings, in which Fig. l is a plan view of the table in closed position, indicating, in dotted lines, certain elements of the support and controlling means for the top members. i i

Fig. 2 is a transverse line 2-2, Fig. l. T

Fig. 3 is a longitudinal sectional elevation on the line 3--3, Fig. '7. i

Fig. 4 is a fragmentary horizontal section on the line 4-4, Fig. 3.

Fig. 5 is a vertical section Fig. 10.

Fig. 6 is a perspective view, partly in section, and partly broken away, taken at the corner of a table constructed in accordance with the invention.

Fig. '7 is a sectional elevation on the line 1-1, Fig. 1, showing the table in closed position.

Fig. 8 is a view similar to Fig. 7, showing the upper top member extended and the normally under top member partially extended.

Fig. 9 is a view similar to Fig. '7 showing the normally under top member in fully extended position.

Fig. 10 is a view similar to Fig. '1 showing the normally under top member moved inwardly from its position in Fig. 9 to abutment with the upper top member in the same plane.

A characteristic of the present invention, is the provision of opposed guiding rails, abutting opposed edges of two top members and serving to support and guide an upper top member for movement outwardly when the table is to be extended, and inwardly when the table is to be contracted, in combination with means for supporting and controlling the normally under top member from a position underlying the upper top member to a position in the same plane thereof.

In the drawings, Fig. 4, I have shown a customary form of supporting frame I to which are applied the usual legs 2. The opposed guide rails sectional elevation on the on the line 5--5,

are indicated at 3, and they are of a height equal to the combined height of the upper and normally under top members plus the distance they are separated when the normally under top member is in retracted position. This degree of separation may be 25 or even less, it only being required that the top members may be sufiiciently spaced so that the movement of the normally under top member to open position and its return may be effected without friction. It will also be understood that all or part of the lower face of the upper top member may be covered with felt to prevent any marring of the normally under top member in such relative movement.

In the present embodiment, the rails 3 are held projected outwardly from the frame I by means of opposed cam plates 4 shown in plan, Fig 4, these plates being secured to frame I by means of screws 5 and projecting laterally of their respective frame supports, the lateral projections being apertured as at 6 to receive screws by means of which the rails 3 may be secured. Each cam plate is formed with a depressed cam section 4a: for a purpose hereinafter to be explained.

Each side rail 3 is formed with a longitudinally extending horizontal channel indicated at 3x to receive supporting lugs Ir carried by the upper top member 1 as shown more particularly in Figs. 4 and 6. When the top member '1 lies in the position of Fig. '7, that is to say, retracted, one of said lugs Ia: abuts a stop pin 8, Fig; 4, and when top member I is moved to open or projected position, one of said lugs engages a stop pin 9 atthe opposite end of channel 30:.

As noted more particularly in Fig. 3, the lower top member 10 abuts rails 3 at opposite edges, and therefore is guided by said rails. When the lower top member is in retracted position, it rests upon the opposed cam plates 4, as shown more particularly in Fig. 3 in conjunction with Fig. 4. When, however, the normally under top member is moved outwardly, it reaches a point where it is elevated above the cam plates 4 and finds support through other means, although still guided by rails 3.

The means for supporting the lower top member include spaced cam bars fixed to said top member at the lower surface thereof, and shown more particularly in Figs. '7 to 10 inclusive, at H. Cam bars H are wholly inactive when the normally under top member is retracted, but when said normally under top member is moved outwardly to the position of Fig. 8, the cam surface a of each of the two cam bars engages a contiguous vertical member of frame I and the outward movement causes the lower top member to be elevated centrally thereof, requiring the inner end to drop, the depressed cam section 49: of each cam plate 4 coming into register mally under top member, it reaches a point where it is rocked on a horizontal axis substantially centrally thereof, the outer end being moved upwardly and the inner end downwardly, as shown in Fig. 8. In the continued movement of the normally under shoulder 12 of each with the adjacent member of frame i. When the elements reach the position of Fig. 9, a horizontal section of an L-shaped supporting bracket I2 will lie in a line just above a strong supporting fin- 3, two brackets [2 indicated in Fig. 1, one of the supporting fingers Thus, when of said normally lower top member is firmly su ported by said fingers, also the horizontal section of each bracket 52 engages the lower surface of the corresponding cam plate which prevents tilting of the said top member. a

The operation of the table has been brought out in conjunction with the description of its construction. It will be understood that various Said side rails may be supported by frame I through intermediaries other than the plates 4. However, I prefer that the plates 4 be employed and as a major support for the top member ID when the latter is in retracted position. the cam-like depression the may readily by a die when plates 4 are constructed of sheet metal.

Having described my invention, what I claim and desire to is as follows:

secure by Letters Patent,

member for supporting and permitting bodily movement of the latter carried by said extendible top member and co-acting with a fixed member of the frame to cause bodily elevation of said extendible top member when JOSEPH COOPER.