US1886648A - Slide for extension tables - Google Patents

Description

NOV. 8, 1932. J COOPER 1,886,648

SLIDE FOR EXTENSION TABLES Filed Nov. 6, 1930 2 Sheets-Sheet l 8 I L, (k I t] INVENTOR ATTORNEY Nov. 8, 1932. J. COOPER 1,886,648

SLIDE FOR EXTENSION TABLES Filed Nov. 6, 1930 2 Sheets-Sheet 2 g m A x 9x r'\ 1 20 221 EL? INVENTOR %/Q 25 Z ZOE 20 22 f ,L' W Y/ ATTORNEY Patented Nov. 8, 1932 JOSEPH COOPER, OF NEW YORK, N. Y.

SLIDE FOB EXTENSION TABLES Application filed November 6, 1930. Serial No. 493,777.

The object of the present invention is to provide a slide for automatic extension tables, the slide so controlling the outer leaves, employed in conjunction with a fixed centre leaf, that upon the outward movement of one underlying leaf the slide will act to carry the second leaf outwardly and the two upwardly to the plane of the centre leaf, a final and reverse movement carrying the movable leaves into contact with the stationary leaf.

The invention particularly relates to the means for controlling cam action of theslides so that when the table isextended and it is 5 desired to contract the table by restoring the movable leaves to their position underlying the centre leaf, such action may readily be effected. I

I The invention will be described with reference to the accompanying drawings, in

which Fig. l is a transverse section through a table in which the slides are incorporated showing the position of the elements when the table is contracted and the movable leaves are lying under the stationary leaf, certain parts of the table being broken away.

Fig. 2 is a plan view, partly broken away, showing the leaves in contracted position and also in the position of the cross sectional view, Fig. 6.

Fig. 3 is a view similar to Fig. 2 showing the table extended and the movable leaves in contact with the fixed centre leaf.

Fig. 4c is a horizontal fragmentary section on the line t4:, Fig. 1.

Fig. 5 is a vertical section on the line 55, Fig. 4.

Fig. 6 is a transverse section of a table embodying the invention showing the parts in position after the movable leaves have been carried outwardly preliminary to bringing them into contact with the centre leaf in the plane of the latter.

Fig. 7 is an enlarged view similar to Fig. 6 showing the position of the parts when the table is extended and the movable leaves in contact with the centre leaf.

Fig. 8 shows the position of the elements when, after table has been extended, themovable leaves have been moved outwardly and certain switch elements have been actuated to the point where a reverse movement of the movable leaves will carry them down from the plane of the centre'leafto a position below the latter.

Fig. 9 is a fragmentary view, partly in section, showing the construction of the switch mechanism.

Fig. 10 is a perspective view of certain 00 elements of the switch mechanism. 7

Fig. .11 isa fragmentary horizontal section on the line 1111, Fig. 10.

Referring to Fig. 2 of the drawings, it will be seen that the embodiment of the invention herein illustrated is applied to a tablehaving a stationary centre leaf 1 mounted on two sets of blocks 2, each set being mounted on a horizontal frame member 3 which serves as a support for the slides 4 and 5. Each of 110 these slides is formed with a rack 6, the racks of the opposed slides 4 and 5 being engaged by a pinion 7 Slide 4 at each end of the table may carry a movable leaf 8 and slide 5 at 7 each end of the table may carry a movable leaf 9. Leaf 8 may be provided with a longitudinal apron 8m and leaf 9 may be provided with a longitudinal apron 900. The slides 4 and 5 are alike in construction and a description of one will suflice for the second. The horizontal frame member 3 is, as to function, the stationary member of the slide construction comprising the slides 4' and 5. To this end at each side thereof frame member 3 is cut with a longitudinal channel to receive 5 a slide bar 10 provided with anti-friction rollers 11 for free running in the channel, the slide bar in each case also carrying a headed stud 12 entering cam slot 13 formed in the V slide member now being described, to wit, 4. The bar carries a second headed stud 14 entering a cam slot 15 formed in the said slide member 4, the cam slots 13 and 15 being identical. At one end of the channel 305' is a pin 16 which serves as a stop against any but predetermined movement of bar 10 toward the pin. Y I

Now assuming the parts to be in position of Fig. 1, it will be seen that an outward movement of leaf 8 will, assuming bar 10 to 4 as by a loop piece 21.

position underlying the stationary leaf were it not for the provision of certain stop and switch members now to be described.

Pivotally mounted on slide member 4 at 17 is a stop bar 18 the latter normally being thrown in such position that its active end obstructs the downwardly extending portion of cam slot 13 of the said slide member 4. Stop bar 18 has an outwardly bent end 1890 in register with the cam surface 20% of a sliding member 20 suitably held upon member Switch member 20 pivotally carries a tooth 22 normally held in the position: of Fig. 10 by a spring 23. The left hand edgeof tooth 22 (in the position of Fig. 10) is bevelled.

When slide 14 is moved from the position shown in Fig. 1 to the position shown in Fig. 6 the leaf 8 will be brought beyond the marginal edge of thestationary leaf 1 and then raised by the action of studs 12 and 14 on the cam faces of the slide formed by cutting the cam slots 13 and 15. In the final outward movement of slide 4 stud 12 will rideover the top of stop 18 and will depress the end of the latter whereupon-spring 19 will snap the stop back into position to obstruct the cam slot 13 as'shown in Figs. 6 and 7. Slide 4 with leaf 8 may then be moved inwardly in a straight line inasmuch as the slide will be lockedto slide bar 10. When, however, slide 4 is moved outwardly from the position shown in Fig. 7 to the position shown in Fig. 8, tooth 22 will come into contact with finger 24 and inas much as tooth 22 normally rests against a stop 22%, Fig. 11, the switch device iscaused to move bodily to the left until its cam surface 20a: swings pivoted stop 18 to position shown in Fig. 8, and the switch member remains in that position while movable leaf 8 with slide4 is moved to the left causing descent of the leaf to initial closed position as" shown in Fig. 1. In its movement from the position shown in Fig. 1 to the position shown in Fig. 6, the tooth 22 passes under finger 24 and thence is carried to a plane intersecting the finger asshownin Fig. 6. When the slide 4 is moved from the position of Fig. 6 to Fig. 7 thebevelled edge of the tooth enables it to be idly swung back, by the finger until it clears the latter and assumes the position shown in Fig. 7. When, however, slide 4 is moved to position of Fig. 8 the tooth 22 will be caused to engage the finger and the switch will be actuated to slide members, stud carrying members having studs engaging said cam surfaces and permitting relativefmovement between the slides and said stud carrying members during a movement of an underlying leaf outwardly into the plane of the centre leaf, a

member adapted to automatically lock together a slide and its co-acting stud carrying member, a movable switch device adapted to throw said locking member to inactive positon, and means for actuating said switch device. U

2. An automatic extension table comprising a centre leaf and leaves adapted tolie under. the centre, leafa slide combination for the underleaves comprising a centre slide member, movable slide members adjacent the centre slide member, rackand pinion connections intermediate. the movable slide members, cam surfaces earned by the movable slide members, stud carrying members having'studs engaging said cam surfaces and i permitting relative movement between the slides and said stud carrying members during a movement of an underlying leaf outwardlyinto the plane of the centre leaf, a

member adapted to automatically lock to-L gether a slide and its co-actingstud carrying member and means acting thereafter to release the slide and its co-acting stud carrying member.

, 3. An extension table structure comprising fixed and movable leaves, a central structure connected to the fixed leaf, slides movably mounted at opposite sides of the central structure and connected to the respective movable leaves, roller bars mounted for reciprocation on the central structure, rollers thereon engaging in. slots in the slides having horizontal and angular portions, latches to connect the roller bars operatively to the slides, and latch releasing means carried by the slides.

4. An extension table structure comprising fixed and movable leaves, a central structure connected to the fixed leaf, slides movably mounted at opposite sides of the central structure and connected to the respective movable leaves, pin bars mounted for reciprocation on the central structure, portions thereon engaging in slots in the slides having horizontal and angular portions,

latches to connect the pin bars operatively to the slides, and latch releasing means carried by the slides, the latch releasing means comprising strips mounted for reciprocation on the slides and having cam faces to operate the latches, and pawls pivotally mounted tomove the releasing strips in one direction; said strips being moved in the opposite direction by engagement with members vof the movable leaves.

In testimony whereof, I have signed my name to this specification.

JOSEPH COOPER.

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