US2005213A - Extension slide device - Google Patents

Description

June 18, 1935. M. WURM EXTENSION SLIDE DEVICE Filed Sept. l, 1934 INVENTOR.

ATTORNEY.

Patented June 18, 1935 I y UNITED .STATES PATENT OFFICE l 2,005,213 v K EXTENSION SLIDE DEVICEv Max Wurm, Brooklyn, N. n I application September 1, 1934, Serial No. 742,376 p 3 Claims. (Cl. 311-69) My invention is related to extension slide members 3, 4 and 5, havingrelativesliding movemechanism which is adapted for use with orments longitudinally in the horizontal. The cendinary` extension tables in which one or more trai-member 4 is fixed upon a subjacent support, table top-members are slid back and forth in the such as an ordinary bridge or stretcher or other 5, horizontal, and also for use with a shelf or horisuitable-part, which is not here. shown, and, it 5 zontal ledge. Some of the important features 0f servesjas a guide and support for the two rasthe invention are, that simplicity of construction sociated side- members 3 and 5, which are mountis obtained; that the peculiar construction and ed to slide upon the opposite sides of the centralarrangement of the guide fixtures maintain the y member; the member or section 3 being secured sliding members parallel and retain them against by screws E to the underside of the top-member 10 vertical movement so that they keep the same 2, and the member or section 5 being secured by level; that the guide fixtures also serve as gaging screws 1 to the underside of top member I. means for setting and positioning the fixtures The side- members 3 and 5 are constructed and parallel and in -a1inement; that outwardly prooperate alike so that a description of one will jecting stops may be conveniently provided atthe serve for both, the same reference numeral bel5 respective ends of the sliding-members; that the ing used for member 3 but with a prime mark device may be made entirely of metal or partly thereon. The member 5 is a channel-iron with of metal and partly of wood, and the metal parts aflat back 8 sliding along the side of the central-v made from angle or channel-irons; that it may member 4 with its upper right-angled iiange 9 be manufactured at relatively low cost, and that attached to the underside of top-member I.by 20 itsv structure and arrangement is such that the screws I. TheY lower flange I!) of member 5 is manufacturer need only produce and keepin Stock narrower than the upper flange and forms a about three different sizes and will be able to'exguide-rib which slides back and forth in guidetend such sizes to any desired extension by merely ways or grooves I I and I2 formed in the fixtures moving a guide-fixture to the right or left in or brackets I3 and I4, respectively, which are se- 25 order to increase or decrease the extension of cured by screws- I5 and I6, respectively, to the the slides. Other advantages of my improved sidey of the central-member 4, as indicated in slide device will be understood from the detailed Figs. 2 and 3. l A description hereinafter given inv connection with The xturesv I3 and I4 are spaced apart a certhe drawing herein. tain distance and the latter isengaged by a fixed 30 I have illustrated types of my invention in the Stop I1 'which is formed at the inner end of side accompanying drawing, wherein; member 5 by a bent extensionl of the guide-rib Figure l shows a top plan view of an extension I il, and the xture I3 is engaged by an outwardly table embodying my improvements, the form of projecting stop I8, which is struck up from the the slide being of the equalizing kind, and only back portion 8 of the member 5, as shown in Fig. 35 one longitudinal half of the table being shown. 2. These stops, by engaging or colliding with Figure 2 shows an enlarged vertical sectional the sides of the respective fixtures, act to limit View of the structure shown in Fig. 1, the plane of the range 0f relative IOIEIldIIa-l mOVement 0f the section being indicated by the broken-line the sliding member 5; ythe stopsbeing formed 22, in Fig. l. integral with said member. 40

Figure 3 shows an enlarged vertical cross-sec- The `fixtures or brackets I3 and I4 may be tionalview of the structure shown in Fig.2 the formed from suitable sheet-metal, likewise the plane of the section being indicated by the side-members 3 and 5and they are so shaped as broken-line 3 3, in Fig. 2. to pass upwardly around the guide-rib I0 of slid-4 Figures 4, 5 and 6 show cross-sectional views ing member 5 with the upwardly extending flat 45 similar to Fig. 3, but of different modifications part engaging the side of said member to provide of the three membered slide. a suitable guiding means for the same, and the Referring to the drawing, in which like nuxtures serve to prevent vertical movement of merals of reference designate like parts throughthe Sliding Sdememb1`5 and keep them on the out, and considering the structure shown in Figs. same level, and also act to prevent lateral or 1, 2 and 3, I and 2 indicate two cooperating table. wabbling movement of said members. top members which are Vadjustable toward and An important feature of the guide-fixtures is away from each other horizontally to vary the the provision of positioning-means therefor, length of the table in the usual way. In this which consists of an inwardly projecting ilange form, my device consists in three juxtaposed I9 on fixture I4 taking intoa horizontal slot or cut 20 formed in the side of central-member 4, and a similar flange 2I on fixture I3 taking into a slot 22 in the side of member 4, the slots 20 and 22 being in horizontal alinement. By means of this simple construction, the guide way fixtures may be mounted in their true positions with certainty of parallelism and alinement on the central member, so that the parts may be assembled quickly without necessitating the taking of measurements in order to get the xtures in their proper places, since they are practically duplicates and the positioning-flange and guide way of each are the same distance apart vertically. If preferred, in all of the forms, the two iixtures or brackets I3 and I4, may be merged into one long bracket covering the horizontal distance of the two separate brackets, the rectilinear movements of the sliding members being the same in each form.

In the form shown in Figs. 1, 2 and 3, the device is constructed with equalizing means comprising a rack 23 formed in the back of side-member 5 and a similar rack`23 formed in side-member 3, with an intermeshing cog-wheel 24 turning on a vertical pivot 25 on the upper face of the central member 4, so that the slides move longitudinally and simultaneously in opposite directions the same distance, in a manner well known. The bracket I4 has its upper edge cut-away at 26, to clear the teeth of the cog-wheel.

In the modified form shown in Fig. 4, which may be of the equalizing type or not, the structure `is the same as that shown in Figs. 1 toy 3, with the difference that instead of having the gage ange I9 thereof forced into a slot in the central member, this flange I9a of bracket I4a takes under the lower edge of central-member 4a and a screw I6a secures the bracket to the member.

In the modified form shown in Fig. 5, the sliding side-member b is like that of the previously described forms, but its cooperating bracket or fixture I4b is bent back on itself in a U-shape, the inner limb being carried up above the central-member 4b with the positioning-flange I9b extending over the top edge thereof, and the outer limb forming a groove I2b to guide the lower edge of the sliding member 5b, as previously described.

In the modification shown in Fig. 6, the construction is the same as that of Figs. 1 to 3, the sliding side-member 5c cooperating with the fixture I4c in the same way, but the gage-flange at the foot of the xture is omitted and a gage screw I5c is used to secure the xture to the side of central-member 4C.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:--

1. An extension slide device comprising a unit of three juxtaposed members having relative longitudinal sliding movement, the central one of which serves as a xed guide-member for each of the engaging sliding side-members and the latter being provided with outwardly extending guideribs, guide-fixtures provided with inwardly disposed guide-ways engaged by said guide-ribs, said fixtures being mounted on said central member below and exteriorly of said side-members and serving to guide the side members in parallel longitudinal movement Fand in the same horizontal plane.

2. An extension slide device comprising a unit of three juxtaposed members having relative longitudinal sliding movement, the central one of which serves as a xed guide-member for each of the sliding side members and the latter being provided with outwardly extending guide-ribs, guide-xtures provided with inwardly disposed guide-Ways engaged by said guide-ribs, said lixtures being mounted on said central member below and exteriorly of said side-members and serving to guide the side-members in parallel longitudinal movement, and means on the lower part of each xture adapted to engage said centralmember and serving as positioning means to set the guide-Way of each fixture in horizontal alinement on said central member.

3. An extension slide device comprising a unit of three juxtaposed members having relative longitudinal sliding movements, the central one of which serves as a. fixed guide member for each of the sliding side members, each side member consisting of a channel-iron having outwardly extending ilanges with its back opposite to and.

in sliding relation with said central member and with its lower flange serving as a guide-rib, one or more brackets or fixtures mounted upon each side of said central member and provided with guide grooves or Ways for receiving the guideribs of said side members, and the upper flange of each said channel-iron serving as an attaching part to the under side of a table top member.

MAX WURM.

Images