1. Field of the Invention
This invention relates to the installation of an optical fiber or cable over a desired span at a customer premises.
2. Discussion of the Known Art
U.S. Pat. No. 7,266,283 (Sep. 4, 2007) describes fiber optic storing and dispensing apparatus. The patented apparatus includes a casing containing a rotatable spool, wherein a long and a short length of a fiber optic jumper cable are coiled in corresponding grooves on the spool. Both ends of the cable are coupled to connectors. One length of the jumper cable is extendable a certain distance from the casing to establish a first connection at one end of the cable. The other length is then manually uncoiled from the spool for making a second connection at the opposite end of the cable. The patent notes (col. 5, lines 32-39) that once the jumper cable is connected at both ends, the casing may be mounted on a junction box via magnetic strips to provide a removable support for the casing.
U.S. Patent Application Pub. No. 2008/0187276 (Aug. 7, 2008) discloses a flexible optical fiber tape including an adhesive substrate strip, and at least one optical fiber maintained by the strip. According to the patent, the strip may be adhered along with the fiber to a wall, floor, or ceiling in indoor applications.
As far as is known, no tool, system or technique has been disclosed that will enable an installer to route an optical fiber or cable and simultaneously apply adhesive to adhere the optical fiber or cable on a surface.
According to the invention, a tool for routing an optical fiber or cable over a desired span on a visible supporting surface at a given premises, includes a hand-held gun device with a cartridge, and a reel or spool is attached to the gun device or to the cartridge for storing a length of the fiber or cable to be routed. The cartridge dispenses an adhesive material on the fiber when the fiber is unwound from the spool during use of the tool. A fiber-routing applicator is disposed at the distal end of the cartridge. The routing applicator is configured to receive the optical fiber from the spool and to enable both adhesive material and fiber to be simultaneously dispensed as the applicator travels over the desired span.
According to another aspect of the invention, a tool for routing an optical fiber or cable over a desired span on a visible supporting surface at a given premises, includes a cartridge having a first nozzle, a spool and a device attached to the first nozzle. The cartridge contains adhesive material that is dispensed from the first nozzle the distal end of the cartridge. The spool contains a length of the optical fiber to be routed over the desired span, and the spool is attached to the cartridge. The device attached to the first nozzle at the distal end of the cartridge is configured to receive the optical fiber from the spool and to enable both adhesive material and fiber to be simultaneously dispensed as the cartridge travels over the desired span.
According to another aspect of the invention, a method for routing an optical fiber over a desired span on a structural surface inside a building or living unit comprises the steps of: storing a length of the optical fiber in a container; applying a bead of adhesive material to at least a portion of the desired span; and removing the length of optical fiber from the container and pressing same into the bead of adhesive material.
According to another aspect of the invention, a method for routing an optical fiber over a desired span on a structural surface inside a building or living unit comprises the steps of: storing a length of the optical fiber in a container; removing the length of optical fiber from the container and attaching same to the structural surface at two or more points along the desired span; and applying a bead of adhesive material to the optical fiber between the points of attachment.
According to another aspect of the invention, a method for routing an optical fiber along a desired path on a structural surface between first and second locations within a building or living unit comprises the steps of: storing the optical fiber within a fiber storage module, said fiber being wound on a spool within the module and terminated at each end with an optical connector; applying a bead of adhesive material along a portion of the desired path; unwinding a portion of the stored fiber from the fiber storage module; positioning one of the connectors at the first location for connection to a source of incoming optical signals; pressing the unwound fiber into the bead of adhesive material; and attaching the fiber storage module to a surface at the second location within the building or living unit.
For a better understanding of the invention, reference is made to the following description taken in conjunction with the accompanying drawing and the appended claims.
In the drawing:
The inventive system allows an optical fiber or cable to be routed along a structural surface (e.g., a wall or ceiling) associated with a living unit at a given premises, using a limited amount of hardware and with little if any visible profile. Unless otherwise stated, the terms “optical fiber” and “cable” are used interchangeably herein to connote one or more lengths of optical fibers, each of which may or may not be protectively enclosed by an outer cable jacket. Further, as used herein, the term “structural surface” refers to any visible or exposed surface of the walls, ceiling, or floor associated with a given living unit (e.g., a room or an office) at a customer premises.
In
The spool 12 may also have an optical termination unit or box (also known as a “rosette”) detachably fastened on one side of the spool. See the fiber storage spool 202 with attached rosette 208 in the embodiment of
The fiber 14 may comprise, for example but not be limited to, a 200 μm optical fiber, a 250 μm bare optical fiber, a 500 μm tight buffered fiber, a 900 μm tight buffered fiber, or cordage comprising a buffered fiber covered with aramid yarn and an outer jacket. Preferably, the diameter of the cordage is 900 μm, 1.6 mm, 2 mm, 3 mm or 4.8 mm.
The spool 12 may be constructed and arranged in a known manner for easy mounting on the gun device 10, and for quick removal when the wound fiber 14 is exhausted or when another spool containing a different type of fiber or cable is desired. The fixture for mounting spool 12 on gun device 10 may allow spool 12 to be re-positioned on the gun device 10 prior to or during the installation process to bypass obstacles to the passage of the gun device 10/spool 12 assembly. One or more rings or loops 20 are preferably fixed at intervals along the length of the cartridge 16 or other portion of the device body, for guiding the fiber 14 as it unwinds from the spool 12 toward the applicator tip 18.
During use of the gun device 10, the fiber 14 unwinds or pays out from the spool 12 to be deposited on a structural surface over the desired span, together with the caulking or the adhesive 22 from the device cartridge 16. The applicator tip 18 and the guide rings 20 are dimensioned and arranged so that the fiber 14 is guided along the desired pathway and the adhesive 22 will flow over the fiber and bind the fiber to the surface, while providing strain relief for the fiber at the same time.
The cartridge 16 may contain and dispense a commercially available silicone or acrylic based caulking. If it is necessary to recess the fiber or cable 14 below a structural surface (for example, the surface may be a living room ceiling or a sheet rock wall), the gun device 10 may also be provided with a cutting blade arranged at the distal end of the device for forming a furrow or a trough in the surface, in situ. This would allow the device to lay the fiber 14 in the cut trough before the caulking or adhesive 22 from the applicator tip 18 is deposited over the fiber.
Alternatively, the fiber 14 may be pre-coated with a dry adhesive, and the cartridge 16 can be arranged to dispense water or other liquid substance for activating the adhesive on the fiber as it passes in the vicinity of the cartridge applicator tip 18. For routing over rough surfaces, the fiber 14 may include an outer foam layer in which the adhesive is impregnated and becomes subject to activation when a liquid is applied on the outer surface of the foam layer. Liquid activated adhesives are disclosed in, e.g., U.S. Pat. No. 7,235,608 (Jun. 26, 2007), U.S. Pat. No. 5,296,535 (Mar. 22, 1994), U.S. Pat. No. 4,719,264 (Jan. 12, 1988), U.S. Pat. No. 4,639,395 (Jan. 27, 1987), U.S. Pat. No. 4,575,525 (Mar. 11, 1986), U.S. Pat. No. 4,322,472 (Mar. 30, 1982), and U.S. Pat. No. 3,988,495 (Oct. 26, 1976), all relevant portions of which are incorporated by reference.
An advantage of the tool 50 in
An adhesive coating assembly 56, including an associated adhesive applicator tube or passage 58 and an adhesive cartridge 60, are mounted on the applicator tool 50 downstream from the spool 52. The fiber 54 is guided to pass through the passage 58 after leaving the spool 52. The assembly 56 is operative to supply a determined amount of an adhesive substance from the cartridge 60 into the interior of the passage 58 as the fiber 54 moves through the passage, so that a thin coating of the adhesive is applied on the outside surface of the fiber 54.
Alternatively, and as described above in relation to the embodiment of
The applicator tool 50 preferably has a small wheel, roller, or other fiber routing applicator 64 disposed at the distal end 57 of the tool to aid the installer to position the coated fiber 54 accurately on a structural surface, and to urge the fiber against the surface so that the fiber will bond properly with the surface over the desired span. Further, a portion of the tool 50 between the handle and the distal end 57 may be made to telescope or be extendable, so that the installer can route the fiber over the desired span on the structural surface while holding the tool a distance away from the surface and while standing. A desired minimum bend radius of, e.g., 7 mm may be maintained for the fiber 54 using a conventional outside corner guide.
According to a third embodiment of the invention, a conventional adhesive transfer tape dispenser is loaded with a reel or spool containing a supply of adhesive tape. Before the tape is wound on the spool, an optical fiber or cable is adhered along the length of the tape, on either side of the tape. Alternatively, the dispenser may be constructed and arranged to pay out the adhesive tape and the fiber separately and simultaneously from two different spools. The tape and the fiber may then be guided from the spools to approach one another near the structural surface so that the tape overlies the fiber when the tape is adhered on the surface. Dual spool tape dispensers, such as, e.g., models ATG-700, -714 or -752 from 3M Company, or model H-1221 from ULINE, are presently available and may be modified accordingly in a known manner.
Either arrangement has the advantage that once the tape and the underlying fiber are applied by the dispenser along a wall, ceiling or other structural surface, the fiber will not become embedded in a caulking or adhesive material that would prevent the fiber from being removed safely after routing in a home or office environment. The grade of the adhesive tape may be selected according to the degree of permanency desired for the fiber installation.
The optical termination boxes 206, 208 may be commercially available units such as, e.g., type J424 or type J418 from OFS Fitel, LLC. One of the termination boxes 206, 208 is illustrated in
The fiber storage spool 202 and the termination boxes or rosettes 206, 208 may be fabricated and assembled in a factory environment, so that the installer only needs to:
1. Detach one of the termination boxes (e.g., box 206) from the fiber storage spool 202, and attach the box at a first location (via a screw or other fastener) at or near one end of a span 224 over which the fiber 204 is to be routed on a structural surface 230. See
2. Load the other termination box 208 with the attached fiber storage spool 202 into a corresponding mount or cradle 228 on the application tool 50. See
3. Route the fiber 204 over the desired path 224 on the structural surface 230 using the application tool 50. See
4. Remove the other termination box 208 and the storage spool 202 containing any remaining fiber 204 from the tool mount 228, and affix the box and spool at a second location at or near the opposite end of the span 224 over which the fiber was routed on the surface 230. See
In
The cartridge 16 contains adhesive material 22 that is dispensed from the nozzle 180 at the distal end of the cartridge 16. The adhesive material 22 in the cartridge 16 may be a monomeric or polymeric caulking material containing acrylic, polyurethane or silicone material.. For example, suitable Premium Indoor/Outdoor Sealant—Clear commercially available from DAP Products Inc. in Baltimore, MD, and Loctite POLYSEAMSEAL® ALL-PURPOSE Adhesive Caulk commercially available from Loctite in Westlake, Ohio.
The spool 12 contains a length of the optical fiber 14 to be routed over the desired span, and the spool 12 may be attached to the gun device 101 or to the cartridge 16. In
The spool 12 may be constructed and arranged in a known manner for easy mounting on the gun device 101, and for quick removal when the wound fiber 14 is exhausted or when another spool containing a different type of fiber or cable is desired. For example, as shown in
In
Referring back to
In
Preferably, the nozzle 180 includes a hole 183 that is positioned at one end of the slot 181 for receiving the optical fiber 14, the diameter of the hole 183 being larger than the width of the slot 181, and the width of the slot 181 being narrower than the diameter of the fiber 14 such that fiber 14 pressed into the hollow passageway 185 is retained within the passageway 185 as the adhesive material 22 and the fiber 14 are simultaneously dispensed.
Preferably, as shown in
The nozzle 180 at the distal end of the cartridge 16 may be use directly to dispense adhesive material and fiber simultaneously. However, a second nozzle 280 that attaches to the first nozzle 180 may be used. Such a design has the advantage that its slot and hole are already molded into the nozzle 280.
In
Preferably, at least the thickness of the second nozzle 280 near the distal end (where the tip 282 is located) of the second nozzle 280 is sufficient to avoid widening the slot 281 when the pressure from dispensing the adhesive or caulking material 22 is present. A locking ring consisting of a C-shaped open ended clamp may be placed over the nozzle to prevent the fiber from exiting the slot. The nozzle may include protruding tabs or ridges to guide the locking ring in place.
The second nozzle 280 can also be attached to a first nozzle 180 at the distal end of a squeezable cartridge, i.e., one that does not require a gun device to dispense the adhesive material within the cartridge.
Alternatively, a guide clamp 190 may be attached to the first nozzle 180 of the cartridge as shown in
In
Referring back to
Due to the growing demand for higher speed information transfer at home and business locations, it has become increasingly desirable to add optical fiber to the interior space of an existing structure without intruding into its walls, ceiling or floor. Moreover, it is desirable that such fiber be nearly invisible after installation to preserve aesthetic appearance. Finally, it is desirable that installation be possible by a single craftsman who may need to attach the fiber to a ceiling (generally the junction between the ceiling and a wall), which may require that a ladder be used during the installation process, and that the fiber remain attached to the ceiling as the craftsman repositions the ladder. The following methods substantially satisfy the above-stated desires:
An optical fiber or cable may be routed over a desired span on a structural surface in a room or office in multiple steps. For example, a bead of adhesive material may be applied to at least a portion of a desired span on a structural surface, then a length of an optical fiber or cable stored in a container is removed from the container and pressed into the bead of adhesive material such that the fiber adheres to the surface.
Alternatively, a length of an optical fiber or cable stored in a container may be removed from the container and attached to a structural surface at two or more points along a desired span of the structural surface. Then a bead of adhesive material is applied to the optical fiber between the point of attachment such that the fiber adheres to the surface. For example, staples or tape may be used to temporarily attach the fiber to the structural surface, which then may be removed after the bead of adhesive material has been applied,
Alternatively, optical fiber may be stored within a fiber storage module and then routed along a desired path on a structural surface between first and second locations. For example, the fiber storage module shown in
Referring back to
Optical fiber 1940 may be routed along a desired span on a structural surface between first and second locations within a building or living unit using the fiber storage module 1970. One exemplary routing method starts with the fiber storage module 1970 storing the optical fiber 1940. When the optical fiber 1940 is stored, the fiber 1940 is wound on the spool 1918 and terminated at each end with an optical connector 1942 and 1943.
Then, connector 1942 is positioned at the first location for connection to a source of incoming optical signals. When the connector 1942 is positioned at the first location, it may be connected to an adapter located at the first location. Alternatively, the connector 1942 may be placed near the adapter and connected thereto after the fiber 1940 is routed.
A bead of adhesive material is applied to at least a portion of a desired span on a structural surface between the first and second locations, and a length of an optical fiber 1940 stored in the fiber storage module 1970 is removed from the module 1970 and pressed into the bead of adhesive material such that the fiber adheres to the surface. Then, the fiber storage module 1970 is attached to a surface at the second location within the building or living unit.
Preferably, the adhesive material is substantially translucent when it is applied. Alternatively, the adhesive material becomes substantially translucent within 24 hours after it is applied.
Preferably, the optical fiber 1940 is a buffered optical fiber that is substantially bend-insensitive and can accommodate a bend radius as small as 3 mm without significant signal loss.
In addition, when the fiber 1940 is routed around right angle corners during the installation, first or second bend managers 90 or 92 may be used. The first bend manager 90 shown in
Additional explanation of the fiber storage module 1970 and the bend managers 90 and 92 are disclosed in co-pending PCT Application No. PCT/11/44419 filed on Jul. 19, 2011, entitled “OPTICAL FIBER INSTALLATION AT CUSTOMER PREMISES”, which is owned by the assignee of the present application, and which is incorporated herein by reference in its entirety.
As shown in
As disclosed herein, an optical fiber or cable is routed over a desired span on a structural surface in a room or office, using a limited amount of hardware and with a minimal form factor to avoid creating unsightly marks along the surface. By selecting an appropriate adhesive, the fiber can be adhered on or recessed within most surfaces normally encountered in residential and commercial living units, namely; wallpaper, sheet rock, painted surfaces, and more durable surfaces such as cement, stone, and marble.
While the foregoing represents preferred embodiments of the invention, it will be understood by those skilled in the art that various modifications and changes may be made without departing from the spirit and scope of the invention, and that the invention includes all such modifications and changes as come within the scope of the following claims.
Although the specification discussed methods of routing an optical fiber over a desired span on a structural surface inside a building or living unit, in one particular sequence, the specification did not directly or implicitly require a particular order in routing the fiber. The language of the method claims does not impose a specific order on the performance of the method steps, and the steps can be performed in different order without exceeding the scope of the claim(s).
The present application is a continuation-in-part of co-pending U.S. Non-provisional patent application Ser. No. 12/986,990 filed on Jan. 7, 2011, entitled “TOOL FOR ROUTING AN OPTICAL FIBER OR CABLE AT A LIVING UNIT OF CUSTOMER PREMISES”, which is owned by the assignee of the present application, and which is incorporated herein by reference in its entirety. Also, co-pending PCT Application No. PCT/11/44419 filed on Jul. 19, 2011, entitled “OPTICAL FIBER INSTALLATION AT CUSTOMER PREMISES”, which is owned by the assignee of the present application is incorporated herein by reference in its entirety.
Number | Date | Country | |
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Parent | 12986990 | Jan 2011 | US |
Child | 13357305 | US |