Abstract:
A compound angle limiting device is disclosed herein. The invention provides for control of the angular excursion of a pivotal mass within first and second angles about first and second axes without the necessity for external stops. The invention includes a first coupling mechanism for sensing movement of the mass about the first axis, a second coupling mechanism for sensing movement of the mass about the second axis; a first cam coupled to the mass via the first coupling mechanism and movable in response thereto; and a second cam coupled to the mass via the second coupling mechanism and movable in response thereto. The first and second cams are mounted for physical contact at at least one point to limit the compound angular excursion of the mass via the first and second coupling mechanisms.
Abstract:
A missile includes an optical fiber canister with the optical fiber wound as an annular fiber pack having an initial payout region extending from the inner annular surface. A reinforcing leader overlies the initial payout region of the optical fiber to form a leader composite structure. The leader composite structure is wound into a flat outwardly spiraling coil lying perpendicular to the axis of symmetry of the annular fiber pack, with the outer turn of the spiral leading away from the optical fiber pack. The coil is encased in a mass of potting compound. At the initiation of optical fiber payout, the turns of the coil progressively tear free of the mass of potting compound to achieve a gradual loading of the optical fiber and opening of a path for the axial payout of the portion of the optical fiber not protected by the reinforcing leader.
Abstract:
An in-line filament cleaner and adhesive applicator for an optical fiber (10) which is to be wound onto a canister (22) used as a missile data link, for example, has a first tank (14) containing a cleaning solvent (16), a second tank (18) containing a liquid adhesive (38), and pulleys (24, 26, 28, 34, 36) for moving the fiber (10) through tank (14) to be cleaned along an air path for drying, and through tank (18) where adhesive is applied. An adhesive thickness gauge (20) insures adhesive does not exceed a given maximum and a guid tube (40) directs the adhesive coated fiber at a predetermined angle for winding on the canister (22).
Abstract:
An optical fiber canister (40) comprises a tapered cylindrical bobbin (42) having a length of optical fiber (28) wound thereon to form a fiber pack (43). The optical fiber (28) is wound so as to pay out with a preselected circumferential payout direction component (45), as well as a longitudinal payout direction component. The canister (40) has an optical fiber payout opening (50) through which the optical fiber (28) is paid out. An air duct (60, 62, 90) from the exterior of the canister (40) to the interior of the canister (40) has an air outlet (70) within the interior of the canister (40) oriented to direct the air flow oppositely to the preselected circumferential payout direction (45). The optical fiber canister (40) may be mounted within a missile (20), and the air duct (90) desirably extends from the exterior of the missile (20) to the interior of the canister (40), to provide a velocity-dependent air flow that damps out the helical motion of the optical fiber (28) during payout, permitting the optical fiber (28) to be paid out smoothly even though the payout opening (50) is small.
Abstract:
A fiber guide includes a sleeve having a longitudinal slot therealong a first member, having a notch, is fixed in the sleeve with the notch substantially aligned with the slot. A second member, also having a notch, is rotatably disposed in the sleeve. Thus, a fiber can be positioned in the notches of the first and second members and secured therein by rotating the second member. The fiber can also be readily removed from the guide, without damage or impediment, by reversing the rotation of the second member.
Abstract:
An apparatus for winding a coil pack of a fiber such as an optical fiber winds the fiber as a radial coil, and then joins the coil axially to previously wound coils. Each radial coil is wound on a flexible flange that is deformable from a first tapered shape which facilitates the winding against the flange, to a second shape wherein the coil wound thereon conforms to the shape of the last coil affixed to the fiber pack. The flexible flange is preferably made of an elastomer, and its shape change is readily accomplished by an articulated series of nesting cylinders. The apparatus further includes a fiber winding head that winds the fiber onto the flexible flange, and an adhesive applicator head that applies adhesive between succeeding coils of fiber as they are joined to the coil pack.
Abstract:
In-line application of liquid adhesive to an optical fiber (10) while it is being wound onto a drum (14) is accomplished by a tube (58) interconnected with a pressurized adhesive source of supply (70). An end (60) of the tube provides adhesive in a beadlike strip which wets the drum or underlying winding layer just under the fiber lower surface before it is laid down onto the drum.
Abstract:
A bobbin (50) includes a substantially cylindrical bobbin support (52), formed of a structural material such as aluminum or graphite-epoxy composite material, and an overlying sleeve (58) that slides on the bobbin support (52), formed of a material having a longitudinal coefficient of thermal expansion matched to that of the longitudinal coefficient of thermal expansion of an optical fiber pack (66) wound upon the sleeve (58). One end of the sleeve (58) is fixed to the corresponding end of the bobbin support (52). The expansion coefficient of the sleeve material is preferably at least about 50.times.10.sup.-6 per degree F., to more closely match that of the fiber pack in the direction perpendicular to the fibers.
Abstract:
An optical fiber data link (14) between a missile (12) and a moving platform (10) launch site has a wound stack canister (16) on the platform and a second canister (18) that is aboard the missile. A first version of the platform canister (16) locates the wound stack (20) within an enclosure (26) with the fiber being payed out through an opening (28) in the enclosure which has a curved flared edge portion (30). In yet another version, the platform canister (32) is mounted within a gimbal (38) enabling the fiber payout direction to follow a path that does not result in damage to the fiber.
Abstract:
An optical fiber payout canister (22) comprises a bobbin (30) having a dispensing end and an optical fiber pack having a plurality of optical fiber layers (34, 36) wound upon the bobbin (30). The pack has a transition winding pattern between the optical fiber layers (34, 36) at the dispensing end thereof, and an overcoat adhesive layer overlies the transition winding pattern of the optical fiber pack. The adhesive layer desirably comprises from about 80 to about 72 parts by weight of a precatalyzed organofunctional siloxane polymer and from about 20 to about 28 parts by weight of a silicone elastoplastic resin. The adhesive layer desirably has a tensile strength of from about 25 to about 40 psi, and a modulus of elasticity of from about 1200 to about 1600 psi, over a temperature range of from about -50.degree. C. to about +80.degree. C.