US320124A - Extension-table - Google Patents

Description

(N0 ModeL) 2 SheetsSheet 1.

A. E. FRENCH.

EXTENSION TABLE.

Patented June 16, 1885.

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2 Sheets-Sheet 2.

(No Model.)

A. E. FRENCH.

EXTENSION TABLE.

Patented June 16, 1885.

BY 77mm ATTORNEYS.

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ALBERT E. FRENCH, OF EAST TAVVAS, MICHIGAN.

EXTENSION-TABLE.

SPECIFICATION forming part of Letters Patent No. 320,12 dated June 16,1885.

(No model.)

To. all whom it may concern:

Be it known that I, ALBERT E. FRENCH, of East Tawas, in the county of Iosco and State of Michigan, have invented a new and useful Improvement in Extension-Tables, of which the following is a full, clear, and exact description, reference being had to the annexed drawings, forming part of this specification.

This invention relates to extensiontables which are provided with folding websections for forming the top of the table; and the invention consists of the novel construction hereinafter described and claimed.

In the drawings, Figure 1 is a side elevation, partly in section, of my improved eX- tension-table, the same being partly extended. Fig. 2 is a plan view of the table with the top or leaf sections removed, the same being partly in section and partly extended. Fig. 3 is a partial bottom view of the same partly broken away. Fig. 4 is a partial plan view closed up, and Fig. 5 is a'detail view enlarged. Fig. 6 is a cross-section on linear m, Fig. 2.

The table is formed with a stationary middle part, A, having a central leg, B, and extensible end parts, 0 0, having legs D D,

pockets E, and folding hinged leaves F. The

legs D D of each end part, 0, are connected together by a cross-beam, G, which is provided with two parallel extension-arms, H, which slide in ways formed in the middle part, A. The under surfaces of the arms H are provided with rack-bars I, which engage with pinions J K, secured to a shaft, L, arranged transversely in the part A. The pinions J of the two shafts L are made of sufficient length to extend from their appropriate rack-bars-I to the intermediate space between said rackbars, where they engage with each other. The said pinions J are thus adapted both to connect the shafts L L together, so that they may be rotated in opposite directions by a key or crank applied to one of the shafts, and to engage and operate the two parallel arms H by means of the rack-bars I. The pinions K do not gear with each other, but are set to engage their appropriate rackbars I only. Each arm H slides in a separate way, I, the two ways I at each side of the table being separated from each other by the partition M, which serves to add strength to the middle part, A, as is needed in a long extension-table. Each of the ways in middle part, A, for nearly one-half its length, is made of double the width of its remaining portion, to form a recess, N, Fig. 2, for'receiving a bevel-ended section, H, of the arm H, which section is adapted to be shifted to one side into said recess N, to allow the main part of arm H, which also is beveled at one end, to be moved in alongside of the same in shortening up the ta ble, and to be drawn out of said recess into alignment with the main section in lengthening out the table.

In' order to give the section H the abovedeseribed action, a hooked lever, O, is pivoted in a recess, P, at one side of and communicating with the way in part A, and the short end of the lever is formed with two projections, Q R, arranged in parallel planes and set at an obtuse angle with each other. The hooked end of the lever extends forward a short distance into the recess N, while the projections Q R extend toward the way at its narrower portion and engage with the main section of the arm H by means of recesses S T formed in the adjacent side of said section. These recesses consist of two grooves beginning at opposite points, one above the other, near the inner end of the main section of arm H, and extend ing in opposite directions on parallel lines. The ends of the grooves nearest to each other are formed with inclines U, sloping in opposite directions, which inclines serve as cams for oscillating the lever O by means of the projections Q R, and thereby causing the hooked end of the lever to move the section H laterally by means of a stationary catch, V, on the said section. The inclines U are so lo cated that as the main section of H is drawn out from the wider portion of the way the proj ection Q will be moved out of said way, causing the hooked end of the lever to press the section H out of the recess N into alignment with the main section and into engagement with a rigid hook, \V, projecting inward from the opposite side of the main section from the inclines U. The hook N is arranged to engage with a recess, Y, in the side of section II adj acent thereto, and the lever O is held against the section H by the contact of said section with the projection Q. As the section continues tobedrawn out the projection R and hooked end of lever O are accommodated in a groove, Z, in the said section H, the projection Q fitting against the side of said section above the groove Z to hold said parts in said relation. As the sectional arm H is pushed inward again, as soon as the section H is brought alongside of the recess N the inclines U on the main section will be in position for the one in groove S to bear against the projection R of the lever O, and cause said lever to swing back toward the said recess N, drawing the end of section H with it out of align- -ment with the main section and allowing the said main section to pass in behind said section H and press it completely into recess N as the table continues to be shortened up.

The partition M is formed with a longitudinal groove, A, and a longitudinal rib, B, on opposite sides thereof,with which a corresponding groove and rib on the two sectional arms H at either side of the table, respectively, engage to prevent said arms from being disengaged from the ways by any accidental lifting of either end part 0. i The above description of the arm H and its operation applies to each of the four arms H, and the arrangement of two arms H at one side of the table as described is simply du-' plicated on the opposite side of the table.

The cross bars or beams G are provided with recesses O, for accommodating the pro-' jecting ends of the sections of arm H when the table is folded. The outer ends of the main sections are provided with friction-rollers D for the purpose hereinafter described.

On top of the middle part, A, of the table is secured a broad leaf, E, to each end of which is attached a web leaf-section consist ing of narrow boards G, connected together by flexible strips H These web-sections are adapted to fold into the pooketsE of each end part 0 as the table is shortened up. To adapt the boards G to fold right and left alternately as they descend by gravity into the pockets, the connecting strips H are run through oblique transverse mortises in the boards, whereby the adjacent edges of the boards are eonnected together at the top and bottom alter-;

5o natel y. This means of connecting the boards;

enables themto be moved in and out with less friction than is incident to the use of ordinary metal hinges for such purpose, besides avoiding the objectionable feature of the projection of the joints of such hinges above the surface of the boards when the table is extended.

The friction-rollers D support the web-sections out of contact with the cross-beams G as they descend into the pockets. The pockets are each formed of two castings, K, which are bolted to opposite sides of an end 'part 0, and are provided with a continuous flange, L, turned inward toward one of the web-sections and adapted to receive and support the ends thereof. The bottoms of the pockets are to be made of a width corresponding to the breadth of the boards G, while their upper parts are to be made somewhat wider, as shown.

What I claim is- 1. The combination, with the middle part, A, having guideways or passages, and the end parts, 0 O, of the extensible or sliding arms, each formed of two separate sections having catches for connecting them, whereby said sec tions are aligned when the table is extended, but are disconnected and one of them forced laterally when the table is contracted, substant-ially as shown and described.

I 2. Th'e'combination of the part A, having ways with lateral recess N, the extensible arms H, provided with grooves S T, separated by incline U, a separate sliding section, H, having groove Z, catch V, and recess Y, and the hooked levers O,'pivoted in a recess at one side of said ways and having projections Q R, adapted to be engaged in turn by said inclines for the purpose of oscillating the lever and causing its hooked end to shift the section H by means of the catch V, substantially as shown and described.

3. The web leaf-section formed of boards G, having oblique transverse inortises, and the flexible connecting strips H passed through said mortises, substantially as shown and described.

ALBERT n. FRENCH.

Witnesses:

J. HENRY SoHMEcK, MARY F. SoHMEcK.

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