US2268879A

US2268879A - Extensible table

Info

Publication number: US2268879A
Application number: US274995A
Authority: US
Inventors: Kramer Charles
Original assignee: Mengel Co
Current assignee: Mengel Co
Priority date: 1939-05-22
Filing date: 1939-05-22
Publication date: 1942-01-06
Anticipated expiration: 1959-01-06

Description

Jang, 1942. c. KRAMER EXTENSIB'LE TABLE Filed May 22, 1959 ...I .nur

Patented Jan. 6, 1942 UNITEosTATEs PATENT OFFICE Charles Kramer, Jeiersonvillalnd., assignor to i The Mengel Company, Louisville, Ky., a corporation of New Jersey Application May 22, 1939, serial No. 274,995

3 Claims.

My invention relates to extension tablesof that type in which the extra leaves are carried at the outer ends on runner bars horizontally'slidably and'vertic'ally projected, with reference to the main top to extended position where the top surfaces of the extension member and the main top member are disposed in co-planar relation. f

.The principal object of this invention is to provide the incident ytype of extension table with leaves which are rigidly attached to the extension members, runners or bars, which project inwardly and under the main top member,` and which completely support the same `independently of the` table frame when the auxiliary leaf is extended and lodged in place for use.

A further object residesY in organizing the leaves and runners and the rsupports therefor that provide the extension feature so that adjustments can 'be made by the user of the table in the event some abnormal misadjustment of the parts that make up the table develop, as may be occasioned from the extreme weather conditions or from mechanical damage.

^ A still further object is to organize the operating parts of the table in a substantial and simple manner so as to effect a permanent co-planar alignment of the top surfacesfof .the extension members and the main top member at the time of manufacture and then maintain said relation throughout the useful life of the table.

These objects are obtained by the structure illustrated in the accompanying drawing, in Which- Figure 1 is a perspective top portion of avtable carrying my improvements with a portion of the top and supporting frame broken away to show one of the required four extension runners and the mechanism employed for guiding and locating same when the left hand extension leaf is inV the extended position, the right hand extension leaf being shown as lodged in the storage space between the top andthe frame at the right-hand end of the table. It being understood that both leaves are subject to extension for use, and stored when not in use.

Fig. 2 is a vertical sectional view of the cut away portion of Fig. 1 on an enlarged scale to show parts I1, 23 and I8 in full lines.

Fig. 3 is a view similar to Fig. 2, except that the extension leaf is shown lodged or housed in the storage space incident to the tab-le being reduced to minimum size.

Fig. 4 is an enlarged view in section of the runner, the engaging pin carried thereby, and a section 'of the supporting member 23, referred to hereinafter as a keepen engaged by pin 2l on a vertical plane .coincident with the rear surface of MA of lleg I4.

Numeral I0 indicates the rigid top member fixed tosills II, one of which is shown in Fig. 2, which in turn is securedto the frame of the table composed of longitudinal side members I2, end members I3, vat the juncture of the ends of which are mounted the legs I4. I5 designates the left hand leaf shown in the extended position, while the right hand leaf 'I6 is shown in the housed or folded'position, which is.in a space bounded by the undersurface of the fixed main top portion of the frame `and the top of the adjacent leg, as shownin Fig. 1. Il lis one of the four runners (the other three are not shown) sometimes referred to in the industry as an arm. The outer endl of said arm is permanently attached, by any suitable means, such as screws, pins and glue, or a combination thereof, to leaf. I5. The forward endv of this runner, when in the folded position, rests on end member I3, Fig. 3, which end has been provided witha: suitableslot through which it extends, while the central portion rests on stirrup I8, preferably made of metal, and which stirrup is secured to sill II by screws I9. It should be noted that the lower surface I'IA of runner I'I is fashioned on a straight line between its points ofv contact with rend. member I3 and stirrup I8 and fora distance extending beyond to the arcuate formation 20 which merges into a continuing straight surface IlB substantially parallel to I 1A.l This Varrangement is provided so that'as the leaf is withdrawn from the storage location, as shown in Fig. 3 to the position shown leaf is lodged in the YextendedA position for use as shown in Fig. 3.y

The keeper 23 is formed with a body portion 23B, whichA has an arcuate top surface 23C, this keeper is attached to the underneath or bottom side of the main top by means of

screws

24, 25 and 26, so that the keeper can be rocked for the Apurpose ofv effecting adjustments, which feature is explained more in detail hereinafter. Obviously, the leaf and runner, after having traveled sufficiently far to the left to effect a clearance between the engaging faces IBA, I5A of the main top and leaf, respectively, the reverse or backward movement, just referred to, effects the engagement. In other words, the leaf is slid beyond its outward operating position before being finally lodged in the position shown in Fig. 2. As a means for preventing the top surface of the slidable leafs from being marred by rubbing the under or bottom surface of the main top section I0, keeper 23 is fashioned with an inverted track or guard rail 23A, which is engaged by pin 2I in the event the leaf I5 is prematurely elevated during the extending operation. Fig. 4 shows pin 2| in broken lines and its relation to track 23A to indicate the cooperation of these parts during the operation of extending the leaf. This figure also shows the pin and rail II when the leaf is disposed in the extended position for use.

As a means of perfecting the desired planar alignment of the upper faces of the leaf and the main top, adjustments have been provided since all wooden material is subject to change in response to temperature, humidity and variations in manufacture, and further by reason of the ubiquitous errors occurring in fabricated wood parts. Hence the following provisions have been incorporated into this structure:

The extending oval head of the engaging pin 2I is eccentric to the axis of the shank which is shown threaded into rail I'I, however, the threads can be eliminated and a friction engagement substituted, obviously, the leaf I5 can be adjusted in terms of th'e main topby turning the pin. The top surface of keeper 23, which is secured to the bottom of the main top with

screws

24, 25 and 26, is formed on an arc to provide another means for adjusting the leaf. When screw 24 is unscrewed and screw 26 is screwed inwardly, as viewed in Fig. 2, the nosing of the keeper and leaf are lowered in terms of the main top, likewise by manipulating the screws in the opposite order the leaf will be raised. Adjacent the extreme right hand end of bar I'I, at its point of contact with the under surface of the main top, screw 2l is provided not only to provide a further adjustment as when wear takes place but to provide a metal face since this point of contact is in engagement with the main top while the leaf travels from the stored to the active location, also when it is at rest in the extended position.

It will now be noted that the leaf and its runner are permanently attached to the main top by stirrup I8 and keeper 23 and that alignment therewith is effected by instrumentalities carried entirely by these members. Thus th'e main top extension leaves and the supporting means therefor can be completely assembled and aligned independently of the table frame and the legs therefor.

Although I have herein shown and described only one embodiment of my invention, it is to be understood that various changes and modifications can be made therein without departing from the spirit of my invention and the spirit and scope of the appended claims.

I claim:

1. An extension table, comprising; a main top; an under supporting frame to wh'ich said top Iand legs are rigidly attached; a space at the end of the table between the main top and the supporting frame; an extension leaf adapted to be stored within said open space'when not in use; an extension runner having the outer end portion thereof attached to said leaf and slidably mounted for outward movement of the leaf beyond the main top and an inter-engaging device for holding the extension leaf in a fixed location with the top surfaces of the leaf and main top in planar alignment when the leaf with the attached runner are withdrawn and moved backward to bring the inner edge of said leaf into abutting engagement with the adjacent end of the main top; said device consisting of a keeper attached to the under surface of said main top and a pin projecting laterally from said runner, the projecting end of saidpin being eccentric to the axis thereof and rotatable for effecting alignment of the top surfaces of the leaf and main top; said keeper having a nosing fashioned with -a downwardly inclined surface for receiving said pin.

2. The combination in an extension table having a main top and an extension leaf equipped with a runner projecting under said top and inter-engaging and aligning apparatus cooperating with' said top and runner for retaining said leaf in the extended position; said apparatus comprising a pin laterally projecting from said runner and engaging an adjustable arm carried on the under surface of said top; said arm having an arched face disposed longitudinally thereof and juxtaposed to the under surface of the said top and in engagement therewith; a plurality of screws for securing said arm to said top, said screws extending through said arm and intersecting said face and providing means for arcuately adjusting said arm.

3. An extension table, comprising; a main top; an under supporting frame tcwhich said top and legs are rigidly attached; a space at the end of the table between the main top and the supporting frame; an extension leaf adapted to be stored within said open space wh'en not in use; an lextension runner having the outer end portion thereof attached to said leaf and slidably mounted for outward movement of the leaf beyond the main ltop, and an inter-engaging device for holding the extension leaf in va xed extended location with the top surfaces of the leaf and main top in planar alignment when the leaf with the attached runner are withdrawn, elevated and moved backward to bring the inner edge of said leaf into abutting engagement with' the adjacent end of the main top; saidr device consisting of a keeper attached to the under surface of said main top and a pin projecting laterally from said runner, the projecting end of said pin engaging an open notch in the top edge of said keeper when the leaf is lodged in the extended position; said keeper having a guard rail on the bottom edge thereof for transitory engagement with said pin during the sliding movement of the leaf in the event said leaf is prematurely elevated.

CHARLES KRAMER.