US2807826A - Snap-type molding and frame for carpet - Google Patents

Description

Oct. l, 1957 J. E. DE VAULT SNAP-TYPE MOLDING AND FRAME FOR CARPET Filed July 12, 1954 2 Sheets-Sheet 1 INVENTOR- Jss e l/dz/zzf 1 79 fo KNK/@ Oct. 1, 1957 J. E. DE vAuLT 2,807,826

SNAP-TYPE MOLDING AND FRAME FR CARPET Filed July 12, 1954 2 Sheets-Sheet 2 lUnited States Patent 2,807,826 SNAP-TYPE MOLDIN G AND FRAME FOR CARPET Jess E. De Vault, Birmingham, Mich., assignor to Jed Products Company, Detroit, Mich., a corporation of Michigan Application July 12, 1954, Serial No. 442,594 4 Claims. (Cl. 16-7) The present invention relates generally to power-operated door opening and closing devices such as are employed in public buildings. More particularly, the present invention relates 4to a molding and frame for installation of the electric or pneumatic carpet-type of triggering devices for power-operated door opening and closing devices.

At the present time, there are several general types of door opening devices in use. One is the type operated by a photo-electric cell. Another type employs a carpet or mat having pneumatic cells disposed therein which, when stepped on, operate a switch or valve connected to a power-operated door opening device. Still another type employs a mat or carpet, usually of rubber or plastic, containing a plurality of electrical contacts which are brought together by the weight of a person stepping thereon, thereby completing an electric circuit to trigger a power-operated door opening device. The present invention is primarily concerned with the latter type although the novel molding of this invention also has application to the pneumatic type of carpet.

In the installation of these electric or pneumatic carpets, the latter must be firmly held inI position and protected against injury lest their electrical or pneumatic contacts be ruptured or otherwise injured. Yet, they must be easily demountable for inspection, adjustment, replacement and repair. For best results, these carpets are mounted flush with the surrounding oor and with all electrical and pneumatic connections, etc., buried or concealed. In order to mount these carpets in this manner, it has been necessary heretofore to dig or cut a trench in concrete lloors or other type of floor, place a form for'pouring a level surface therein, and mount the carpets with screw-held mountings, trim pieces and the like. It is very diicult to prepare a level supporting surface in this manner and it is a time-consuming operation to install the multitudinous screws, etc. required for a secure installation. The screws, bolts or other fastening devices, moreover, work loose and lead to damage to the carpet itself.

It is a principal object of this invention, therefore, to provide a snap-type molding which does not require screws, bolts, etc., which rmly and securely anchors the carpet and which also serves as a form for thelaying of a new concreteV or composition surface at the correct elevation to perfectly support the carpet installed thereon.

Another object is to provide a molding which anchors itself to concrete and composition-type tloors.

Still another object is to provide `a carpet molding which employs a' simple, rugged, snap-type fastening device which does not work loose in use.

Yet another object is Vto provide a simple two-piece molding embodying `a self-anchoring device, a rugged snap-on outer molding piece, and an integral leveling member for determining the interior level of concrete and other pourable composition ooring materials.

Another object is to provide a molding incorporating electrical, pneumatic. or other connecting devices for simplifying the connectionof electrical and pneumatic carets. p Still other objects and advantages Vof the present invention will be apparent or will become apparent in the detailed description of the invention to follow when taken in conjunction with the accompanying drawings, in whichz` lCC Figure 1 is a plan view of a door installation, with portions broken away, showing the anchor half of the molding of this invention in place as a frame and a smooth interior surface therewithin ready to receive the carpet;

Fig. 2 is a plan view of the door installation of Fig. l, showing a two-piece electrical carpet in place and the snap-on upper molding piece in position;

Fig. 3 is an enlarged longitudinal sectional view of the single assembly of Fig. 2, with portions broken out, the section being taken along the line 3-3 of Fig. 2;

Fig. 4 is an enlarged transverse sectional view of the assembly employing the moldings of this invention, with portions broken out, the section being taken along the line 4 4 of Fig. 3;

Fig. 5 is an enlarged transverse sectional view through the upper snap-on portion of the molding of this invention; and

Fig. 6 is an enlarged transverse sectional view through the lower or anchor portion of the molding of this invention.

In accordance with the present invention, the composite molding of this invention comprises two portions, one .being the anchor or base half shown in Fig. 6 and the other being the snap-on top hold-down molding portion shown in Fig. 5. The anchor half of the molding, indicated generally by the numeral 10 in Fig. l, is installed or supported in a trench or slot dug into a surrounding oor 20. In this position, the straight top edge 11 of the straightsided upstanding leg 12 of the anchor molding 10 is brought llush with the surrounding floor level. Concrete or other plastic flooring composition is poured on both sides of the anchor molding 10 so as to flow about the lower wavy or crimped self-anchoring portion 13. On the inside of the frame, thus dened, the concrete or other material is leveled off flush with the top edge of horizontal leveler leg 14. When the concrete is set, the crimped lower portion 13 of the leg 12 firmly anchors the base molding and the leveler leg 14 provides lateral support. When completed, this part of the installation will appear as in Fig. l, the molding being installed beneath a door 15. The door jamb structure 16 serves as a channel for an electric lead wire or cable. (or pneumatic connection) which passes through a short section of conduit 17 set in the concrete floor and from thence under anchor molding 10 to terminate in an electrical lead wire receptacle 19 (see Fig. 2) located near the center of the carpet. For rigidity of structure, the receptacle 19 may be attached to the molding by suitable screw-type connections, as will be more fully described Ibelow.

In Fig. 2, the snap-on upper half 30 of the molding is shown snapped into position on the frame of Fig. 4 provided by the anchor molding 10. The snap-on molding 30, shown in greater detail in Fig. 5, comprises a top piece or cap 31 having decorative, non-skid grooves 32, 32 in its top surface and on its underside, two downwardlypointing, horizontal planar support bosses 33, 33, one of the latter serving as a bearing on the lioor surface outside the frame and the other for pressing downwardly on the held-down electrical carpet 40. On the underside of the top piece 31 are two downwardly-depending legs 34, 35 located at an intermediate position thereon. The left leg 34 is straight sided and adapted to fit down into a corresponding slot 36 located in the anchor molding lil. The leg 35, however, has an enlarged or thickened portion onV its lower end on what is the side facing away from the anchor leg 12-13 of the anchor molding 10, the thickened, lower portion having autapered face 37 designed to snap down over a complementary tapered face 38 on the thickened upper portion of the leg 39 of the anchor molding 10. Thus, the snap-engaging leg 35 of the snap-on molding 30 usually is somewhat thinner and more flexible than its matching counterpart 39 so as to ex slightly to allow the curved corner 40 on leg 35 to engage itself under the shoulder 41 formed beneath the tapered face 38 of leg 39. Both the anchor and snap-on sections also may have more than one guiding member and more than one snap-engaging mem-ber, if desired. This situation may be reversed, if desired; that is, the snap-engaging leg 39 of anchor molding may be more flexible, if desired. Dis engagement of the snap-on molding piece 30 is accomplished simply by prying upwardly with a tool inserted under the outer supporting boss 33. The design and proportioning of the snap-engaged members, it should be understood, may be varied to take into account the flexibility, strength and other physical properties of the material of construction of the two pieces. These are made, preferably though not necessarily, of aluminum or aluminum alloy, stainless steel, or other bright tinished metal or alloy.

In Figs. 2 and 3, the two halves of the electric carpet 40 are shown in place and the snap-on top molding piece 30 is shown engaged in position on the frame formed by the lower anchor molding 10. At the middle, the two halves of the carpet 40 are shown connected by a carpet dovetail clamp 41, the molded edges of the carpets being secured by screws or bolts 42, 42 connecting the two halves of the clamp 41. The carpet dovetail clamp 41 can be bolted between the anchor frame members, if desired. Near each end of the dovetail clamp 41, there are located the electrical lead wire receptacles 19, 19.

In Fig. 4, there is shown in greater detail a method of bringing the electrical lead wire conduit 17 through the concrete floor either for a single door installation or when interconnecting a number of parallel carpets in a multiple door installation. As shown, the lead wire conduit 17 is brought down from the door jamb structure 16, or from another carpet installation, down through the concrete and up through or connected to a hole (not shown) drilled under the anchor half 10 of the molding and the wire 50 brought thence through the hole in horizontal leg 14 into an electrical receptacle 19 built into the carpet. The latter may be attached to the holes in the leg 14 of the anchor molding, if desired. In this way, all electrical connections may be protected and held in alignment by means of the molding itself.

The advantages of the molding of this invention thus are (l) rm anchoring of the carpet; (2) ease of installation, the molding serving as its own form and its own anchor, and the ease of attaching the upper snap-on top molding piece; (3) the ease of incorporating electrical or pneumatic connections; (4) the ease of removal of the molding for replacement, adjustment or repair of the carpet or its electrical connections; and (5) the simplicity of the molding and its freedom from screw or bolt heads making for artistic clean surfaces which are easy to keep clean.

What is claimed is:

l. A molding for electrical and pneumatic carpets comprising an anchor portion and a snap-on portion, said anchor portion having a substantially vertical guiding, anchoring and leveling member having at one end a ush edge adapted to be set substantially level with a surrounding iloor and at'the other a crimped section for anchoring it in a surrounding structure, an inwardly-projecting horizontal member dening a carpet-retaining depression., and at least one upstanding member attached to said horizontal member for .snap-engaging said snap-on portion, said snap-on portion having a head portion and at least a pair of downwardly-depending members for guiding and engaging with the like members of said anchor portion, at least one of said depending and one of said upstanding members having complementary tapered faces and shoulders designed for rm engagement one with the other.

2. A hold-down molding for installation in a surrounding structure, comprising an anchor section and a snap-on section, said anchor section comprising a vertical leg designed for vertical installation ush with said surrounding structure, the lower portion of said leg being crimped to permanently engage itself in said structure, a horizontal leg intersecting said vertical leg at a depth defining a suitable depression for a held-down object, and at least one upstanding snap-engaging leg joined to said horizontal leg and spaced from said vertical leg to form a positioning slot for a complementary member on said snap-on section, said snap-engaging leg having a thickened upper end cut on a taper and shaped to define a snap-engaging shoulder, and said snap-on section having a top member adapted to fit down on a surrounding structure on one edge and to engage the held-down object on the other and at least a pair of downwardly-depending legs located intermediate the edges of said top, at least one of said legs being straight-sided and positioned to iit into said slot in said anchor section and at least one of the other said legs having a thickened lower end cut on a taper to form a shoulder complementary to that on said like upstanding member on said anchor section, and at least one of said thickened snap-engaging legs being generally thinner and more flexible than its counterpart on the other said section.

3. A hold-dow molding for electrical carpets comprising an anchor section adapted for Hush installation in a surrounding oor and a snap-on section adapted to engage with said anchor section and to rest ilat on said surrounding oor, said anchor section comprising a vertical outside leg adapted to be incorporated in a composition iloor with its top edge ush therewith and having its lower end crimped to anchor itself therein, a horizontal leg intersecting said vertical leg at an intermediate point therein and at a depth corresponding to said held-down carpet, and a second upstanding leg integral withsaid horizontal leg and spaced from said vertical leg so as to define a guide slot therebetween, the upper end of said last-named upstanding leg being thickened on its side facing away from said vertical leg so as to form a shoulder with the rest of said leg and having the said thickened portion cut on a taper on said side facing away from said vertical leg, and said snap-on section having a cap adapted to tit down on said floor on one side and to rmly engage said carpet on the other side, when engaged with said anchor section, and a pair of downwardly-depending members attached to the underside of said cap, one of the latter being shaped and proportioned to fit into said guide slot of said anchor section, and the other of said members having a complementary tapered surface and shoulder for engagement with the like surface and shoulder on said anchor section, the last-named member being more flexible than its counterpart on said anchor section.

4. A molding for carpets comprising a frame member adapted to be anchored in a supporting surface to define an enclosing frame surrounding a carpet-receiving depression in said surface and a carpet-retaining member adapted to releasably engage said frame member around the enclosing frame and hold the carpet in said depression, said frame member comprising an element having a ush edge adapted to be set substantially flush with said surface, an inwardly-extending leveling element defining the depth of said depression, an engaging means to engage and retain said carpet-securing member, and an anchor portion to anchor said frame member in composition material poured around the frame member to the level of said leveling element, and said carpet-retaining member having a head portion and downwardly-extending engaging means adapted to releasably engage the engaging means of said frame member.

References Cited in the iile of this patent UNITED STATES PATENTS 66,588 Hicks July 9, 1867 1,185,488 Ellery May 30, 1916 1,576,527 McBride Mar. 16, 1926 1,592,923 Butterworth July 20, 1926 2,449,904 Lorraine Sept. 2l, 1948

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