US1929056A - Table leaf lifting device - Google Patents

Description

` Oct. 3, 1933. A R DE BURGH I1,929,056

TABLE LEAF LIFTING DEVICE Original Filed July 2l, 1931 /Au/E/v TDR 5 A. 2. DE: BUQGH TTDF/vew/ Patented Oct. 3, 1933 I y Y Y NUNITED STATES PATENT oFFice .7 Albert a. no BorgirD Portiaod, orog.

Application July 21, 1931. Serial No. 552,203 1. Renewed February 17,V 1933 claims. (ores-11:0y Y' This invention relates generally to extension then turns abruptly downwardly at an angle Vof tables, and particularly to those having extra about 45 degrees from the horizontal. The porleaves which are raised and lowered. V 4 Y tion 23 joins with the portion 22 in a tangent .The mam object of this invention is theprocurve 24. l

5 vision of an automatic leaf operating"v device Between the ends 17 and 18 ispivotally mounted o0 Vwhich will not repeat, that is,` one in'which the a three-arm lever 25 by meansv of av shouldered leaf willfbe raised when the table'is pulled apart rivet 26. The lever 25 is kept from engaging once any distance greater than needed for the the plate by means of the Washer 27. An leaf, and heid m that position until .tnetop is arm 28 on the lever 25 is sufficiently long and 1o closed against the inserted leaf, and'in the second heaVy t0 Calls the face 29 0f this arm t0 rest g5 opening operation of the table top it will permit normally agarlllS Uh? Ilallg 20, Where 8S the `Cain the extra leaf to descend in order that .the table face 30 OIIIIS the leaf-lfllg Sid@ 0f the arm 28. may be restored to its contracted position. v A rs800126. all@ Shorter arm 31 iS 01313051196 the The second object is to construct a leaf-lifting afrm'zhnd engages the Curved fiarlgBvDOliOnZ v15 mechanism which V.will be simple tomanufacture When vthe afm 2B iS lafSed, OIIlinE a bridgbe- 7.

and not easily rendered inoperative. o Y tween 4the Til/el? 26 and the hnge` 22- The third p These and other objects, will beoom more aparm 32Y is still shorter andV points downward on parenti-rom `the specification following as illus; the same side of the vertical center of the rivet mated in the accompanying drawing, in which; 26 as is the arm 21, and its function is to prevent Fig. 1 isaside elevation of the device. repeetlhgg. '1" l5 Fig. 2 is a vertical section taken along the line The opeatloh 0f the device 1S 37S fohOWS Beal- 2 2 in Fig 1. ing in mind that the top portion 10 is capable of Fig 3 is a broken soot-,ion taken along the une horizontal slidable movement on its slides 11 and 3-3 in Fig. 1. that'the leaf portion 12 is capable only of vertical Fig. 4 is a perspective view of the bracket. moVemeht oh its Pins' 33 Whleh Dass Shdably 80 Fig. 5 is a longitudinal vertical section through through the. Cross tie 34 it Wh be Seen that if a portion of a table top Showing the table pulled the table 1s 1n a contracted positionland the top apart getting ready for the leaf-raising operation. P oftlohs 10 ar e Pulled apart there ,Wlu he a rela' Fig 6 is an elevation Showing the means for tive movement between the pin 14 and the arm 25.

`550 preventing the repetition of the lifting operation. It Wu be assumed that the table is so ma' 85 Similar numbers of reference refer to similar npulated that ho horizontal movement Wu be parts throughout the Several views. imparted to the leaf 12. A pulling movement on Referring in detail to the drawing, in order to the top 10. W111 Cause the lever 25 o move to simplify the illustration there is shown only those Ward the pm 14 over Whloh passes the afm 32 `3.5 portions of atable which are intimately connected and' if the top 10 is pulled Sufeently for it Will 90 with the invention, namely the top portion 10 cause the am? 28 to. be ralseo- (es shoWh 1h Flgto which is attached a slide 11 above which is 5), and when 1t nas passed the pin 14 the arm 28 mounted an extra leaf 12. The extra leaf has Wm again feu under its oWh Weight trapping attached thereto on its under side a pair of the pm 14 between the Semi-Circular hahge 19 brackets 13 from the side of which projects a and its own face 30. When the table top portions 95 horizontal pin 14, which 'may be solid or in roller 10 are again move@ toward each other the pin form as desired. VOn the side of each slide 11 is .14 Whlch 15;9 ,m Contact Wlth 'the face 30 secured a curved plate 15. each end of which is 1s ra'lsed until 1t rides upon the top 51de 0f.the secured to the slide 11 by means of a screw 16. arm 31 Causmg the arm 3l to be depressed mto The plate 15 is secured to the slide 11 so that the` engagement with the Curved flange portion 24 100 from which the pin 14 descends upon the flange lllgreseorugr 51de and the end v22 and again releasing the arm 28 permitting it to descend to the position shown in Fig. l. The end 18 1s provided with a laterallyturned It wm be understood that the table is now in flange 19 which is in the form of a half circle an tend d o t' t` htl l A. and terminates in a horizontal flange 20 which ex e p s1 lon 1g y C Osed upon the ex 105 tra leaf. If it is desired to lower this leaf the top portions 10 are pulled apart as before, but, this time the pin 14 comes into contact with the under side ofthe arm 3l. The opening movementof the portions 10 is now limited by the is tangent to the main flange at its lower side. The upper end 17 is also provided with a semicircular ange 21 which is tangent to the horizontal flange 22 which extends in the direction of the ange 20, although in a higher plane, and arm 32 (as shown in Fig. 6) which holds the moving parts against the pin 14. The only other movement which the operator can make is to close the table, which he does by reason of the fact that the extra leaf is now on the under side thereof. From the foregoing it can be seen that there is provided a fully automatic table which is simple to construct and incapable of repeating in the sense referred to in the second paragraph of the specification. l,

I claim: 1. A table leaf lifting device consisting of a rocker arm adapted to be pivotally mounted on a table slide, said arm having a stopforholding a top portion thereof in an inclined position, a'

shelf forming a relatively stationary extension for the upper portion of said arm, a leaf supporting pin adapted to ride over the top ofsaid'arm and rest upon said shelf in a manner to raise and sustain a leaf in an elevated position or to pass under said rocker arm in a manner to permit said leaf to lower for storage purposes.

lf2. A table leaf lifting device consisting of an inclined rock lever adapted to swing in a vertical plane having one portion thereof above its pivotal point and the other portion thereof below its pivotal point, stop means for holding said rock lever to a limited movement in each direction, a relatively stationary extension for the upper portion of said rock lever, a second stop means across the path between the upper portion of said rrock lever and said extension, and a pin having supportingmeans for attaching same to the under side of a table leaf, said pin being adapted to ride upon the upper side of said inv.lined arm over the top thereof and rest upon saidextension orto ride off of said extension under the upperuend of said arm against saidV second stop.

v3. AV table leaf lifting device consisting of a rocker arm having an inclined top, side-portions of which extend abve and below its pivotal point, a repeat prevention arm projecting from the under side of said rocker arm, an extension for the upper end of said rocker arm having its end nearest said rocker arm downturned toward said repeat prevention arm, and a vertically movable pin adapted to ride on the top side of said rocker arm or to pass beneath the under side thereof.

4.: In a table the combination of horizontally slidable top portions and aninterposed vertically movable leaf portion, said leaf portion having a bracket secured to the under side thereof including a horizontal pin member attached to the bracket, said slidable top portions having slides of a slide Vadapted'to receive horizontal movement therefrom, said rocker arm having its upper side `inclined from the horizontal, an extension for the upper end of said inclined arm forming al stop therefor, and stop means for limiting the downward movement of the lower end of said arm.

5. An elevator for extension leaf tables consisting of a horizontally movable member, a rocker arm pivotally mounted on said movable member adapted to swing in a vertical plane, said rocker arm having three extensions pivoted about an intermediate point two of said extensions lying diametrically opposite each other and the third extending one side thereof normal to the line connecting said two first mentioned extensions, a bracket adapted to be secured to the under side of an extra leaf, said bracket having a horizontalpin extending therefrom adapted to ride over the top side of said rocker arm and be raised thereby until said pin passes over the vertical center line of said rocker arm pin.

yALBERT R. DE- -BURGH.

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