US2277449A

US2277449A - Retractable anchorage device

Info

Publication number: US2277449A
Application number: US337035A
Authority: US
Inventors: Mathew H Paine
Original assignee: PAINE Co
Current assignee: PAINE Co
Priority date: 1940-05-24
Filing date: 1940-05-24
Publication date: 1942-03-24
Anticipated expiration: 1959-03-24

Description

March 24, E942.. M, H. PAINE RETRAGTABLE ANCHORAGE DEVICE Filed May 24, 1940 Patented Mar. 24, 1942 RETRACTABLE ANCHORAGE DEVICE Mathew H. Paine, Glen Ellyn, Ill., assignor to The Paine Company, Chicago, Ill., a corporation of Illinois Application May 24, 1940, Serial No. 337,035

4 Claims.

This invention has to do with an anchorage device placeable within a building wall or the like to facilitate the attachment thereto of auxiliaries, parts or equipment. The invention more particularly relates to such a device comprising an open ended casing adapted to have the concrete of a Wall poured and hardened thereabout, and a connecting member normally retracted into the casing at the time the concrete is poured but subsequently projectable outwardly through such casing opening into a readily accessible position eXteriorly of the Wall.

Prior devices of the general 'nature of the present device have employed a connecting member which is detached from the casing at the time the latter is embedded in the wall, and this connecting member is reassembled with the casing after the wall has hardened and the forms removed. Thus the anchorage devices currently in use have necessitated an additional time consuming assembly operation upon the job. Considerable time, in addition to that required for the reassembly, is frequently wasted when the disassociated connecting members become misplaced or lost.

An important object of the present invention is the provision of an improved anchorage device of the above character in which the casing for immersion in the concrete and the attaching or connecting member housed thereby are permanently associated in such a manner that the connecting member is disposable within the casing while the concrete is poured and is projectable from the casing into an accessible position after the concrete hardens.

A further object of the invention is the provision of an anchorage device as the above in which the connecting member is operable by the force of gravity to project outwardly of the casing when said casing is inverted as it normally is when disposed within the lower part of a ceiling wall, so that subsequent to the hardening of the concrete and the removal ofthe forms from the lower surface of such Wall, the connectingA member will :automatically drop into the accessible position.

Still a further object of the present invention is the provision of an anchorage device of a simple, novel, economically fabricatable structure, which, for the most part, is composed of sheet metal stampings that are easily formed and assembled.

Additional desirable objects of the invention Will become Iapparent upon reading the following description with reference to the annexed single sheet of drawings, wherein:

Fig. 1 is a fragmentary sectional view of a concrete Wall and form therefor, and taken longitudinallythrough a preferred embodiment of .the invention which is embedded in such wall and attached to said form;

Fig. 2 is a View similar to Fig. 1, but illustrating the wall with the form removed and said device with the connecting member projecting outwardly of its casing; and

Fig. 3 is a sectional View taken on the line 3 3 of Fig. 2.

Referring now to the drawing, where the same reference characters appearing in the various iigures designate the same respective parts, and particularly to Fig. 1, the device generally designated I 0, which is a preferred embodiment of my invention, is shown as it may be installed within a concrete wall II. In the illustrated typical nstallation a Wooden form I2 is assumed to lie in a horizontal plane for initially supporting the concrete kwall II at the time it is poured and for molding the lower surface of such wall.

When equipment 'such as air ducts, soundproong structures, and the like are to be suspended from and supported adjacently to the undersurface of the wall II, a plurality of the devices I0 will be placed within the wall at preselected positions where connection can be expediently made with the apparatus or equipment. Said devices l0 will be inverted and fastened to the upper side of the form I2 in respective registry with those positions by means of any standard fastening means such as nails I3. These nails I3 are passed through holes I4 in flanges I5 Iand I 6 upon opposite ends of a wide U-shaped strap I'l of pressed steel or other suitable material, comprising a part of the device.

A housing for the device I is formed of a cylindrical member I8, open at both ends and having diametrically opposite side wall openings I9 and 2G. In assembling the device the cylindrical member I8 is disposed between opposed legs 2| and 22 of the strap Il, the bridge portion 23 of said strap being swaged inwardly by die means to effect a -circular boss 24 which projects inwardly of an end of the member I8 to prevent relative lateral movement between said member and the bracket or strap Il. A pair of axially aligned holes 25 and 26 are placed for alignment With the holes I9 and 20 in the member I8 when the latter is in the assembled position shown, and a restraining member in the form of a pin 21 is inserted through the holes I9, 20, 25 and 26 for cooperating with the boss 24 for holding the parts I1 and I8 in assembly. Prior to inserting the pin 21 through an adjacent pair oi the aligned holes as and I9, a connecting means or member 28 having an elongated opening or slot 29 therein (see Fig. 3) is projected into the housing with said opening 29 in registry with the holes I9, 20, 25 and 2S whereupon the pin 21 is inserted through all of these holes prior to being swaged upon one or more of its ends for holding it permanently in position. The opening 29 in the connecting member 23 is suiiciently long to permit reciprocal movement of said connecting member between a retracted position within the housing I8 as illustrated in Fig. 1 and a projected position as illustrated in Figs. 2 and 3, where a substantial portion of the opening 29 extends axially beyond the lower end of said housing, the sections of the connecting member at the ends of the opening 29 serving as stop means for determining the limits of said reciprocal movement.

A plurality of holes as may be provided in the U-shaped strap IG, if desired, to facilitate the entrance of soft concrete into and about the strap to enable the device to serve as a reinforcing means for the concrete as Well as to become well anchored therein. The anges i5 and I6 are spaced axially upwardly from the lower end of the housing member I8 to permit such lower end tov seat upon the form l2' in a manner enabling the device to exclude concrete from the housing interior. This spacing of the anges l5 and I6 further provides for space beneath them into which concrete may flow so they will be embedded and hence concealed within the wall.

Subsequent to hardening of the concrete the form I2 will be removed in the conventional manner incident to which the Shanks of the nails I3 will be extracted from the form. The downwardly projecting Shanks of the nails will then be clipped off, whereupon the lower surface of the wall will appear as illustrated in Fig, 2. Also, upon removal of the form, the connecting member 28 will be permitted to drop from the position shown in Fig. 1 to the position shown in Figs. 2 g

and 3, thereby providing a section of its opening 29 in an easily accessible position below the wall surface. Consequently wire, as 3|, or any kind of fastening means for the apparatus or xtures which are to be suspended from the ceiling, may

be readily inserted through openings 29 for attachment with the connecting means of a desired number of said devices.

The device is exceedingly easy to manufacture, it being constructed of but four simple parts which are economically produced and assembled. In addition to this advantage of the device, it provides the highly desirable feature of having the connecting member permanently associated therewith and in a manner that said member will drop automatically into the accessible position when the forms are removed from the wall of a ceiling installation.

While I have thus described my invention, I do not wish to be limited to the precise details described as changes may be readily made without departing from the spirit of my invention, but having thus described my invention I claim as new and desire to secure by Letters Patent the following:

1. An anchorage device comprising a casing having an end. opening and a side wall thereabout, securing flange means projecting outwardly from said side wall adjacently to said opening, a restraining pin traversing said casing and said flange means for holding the same in assembly, a connecting member mounted in said casing and reversibly movable axially of and within said opening, said connecting member being completely retractable into said casing when moved in one direction, and stop means movable with said connecting member and abuttable against said restraining pin to preclude movement ci said member in the opposite direction beyond a limit at which said member projects a predetermined distance outwardly of said opening.

2. In an anchorage device7 the combination of a casing comprising a tubular member and a strap-like U-shaped member including a bridge section disposed in closing relation with an end of the tubular member, opposite leg sections extending along diametrically opposite sides of said tubular member and out-turned anges respectively at the ends of said leg sections and adjacently to the opposite end of said tubular member, a restraining pin mutually traversing said leg sections and said tubular member and being thus effective for maintaining said bridge section against said end of the tubular member, a connecting member in said casing and reversibly movable axially of and within the opposite end thereof, said connecting member being movable in one direction into a retracted position completely within the tubular member, and stop means upon said connecting member and abuttable against said restraining pin to preclude movement of said connecting member in the opposite direction beyond a limit at which said connecting member projects a predetermined distance outwardly of said other end of the tubular member.

3. In an anchorage device, the combination of a casing comprising a tubular member and a strap-like U-shaped member including a bridge section disposed in closing relation with an end of the tubular member, opposite leg sections extending along diametrically opposite sides of said tubular member and out-turned flanges respectively at the ends of said leg sections and adjacently to but spaced from the opposite end of said tubular member, a restraining pin mutually traversing said leg sections and said tubular member and being thus effective for maintaining said bridge section against said end of the tubular member, and a slotted connecting member in said casing and reversibly movable axially of and within the opposite end thereof, said connecting member being movable in one direction into a retracted position completely within the tubular member, the slot in said connecting member embracing said restraining pin and one end of said slot being disposed for abutting against said restraining pin to preclude movement of said connecting member in the opposite direction beyond a limit at which said connecting member projects a predetermined distance outwardly of said other end of the tubular member.

4. In an anchorage device, the combinationof a casing comprising a tubular member and a strap-like U-shaped member including a bridge section disposed in closing relation with an end of the tubular member, an inwardly swaged boss upon said bridge section and projecting downwardly into said end of the tubular member, opposite leg sections extending along diametrically opposite sides of said tubular member and outturned iianges respectively at the ends of said leg sections and adjacently to but spaced from the opposite end of said tubular member, a restraining pin mutually traversing said leg sections and said tubular member and being thus effective for maintaining said boss Within said end of the tubular member, and a slotted connecting member in said casing and reversibly movable axially of and Within the opposite end thereof, said connecting member being movable in one direction into a retracted position com- 10