Abstract:
A power management circuit decreases power consumption in an electronic door lock. The power management circuit includes an ON/OFF circuit, a load switch circuit and a electronic door lock circuit. The ON/OFF circuit generates an initial enable signal in response to a detected keycard that places the load switch circuit in an enabled state. When enabled, the load switch circuit provides dc power to the electronic door lock circuit that allows the electronic door lock circuit to receive identification input from the detected keycard and determine whether an output should be generated to actuate the door lock mechanism. Having completed the keycard detection operation, the electronic door lock circuit generates a self turn-off signal that is provided as feedback to the ON/OFF circuit to disable the load switch circuit. When disabled, the load switch circuit prevents any power from being provided to the electronic door lock circuit and thereby conserves energy otherwise consumed by the electronic door lock in times between activations.
Abstract:
A roller assembly includes a frame (16) defining a doorway (14). A rail (32), which includes at least one supporting surface along at least one side of the rail, is secured to the frame (16). At least one roller (38), which is adapted to roll along the supporting surface of the rail (32), has a tire material (68) that contacts the rail (32). A thermal barrier (62, 70, 72, 76, 80) is positioned to inhibit heat transfer from the rail (32) to the tire material (68).
Abstract:
A passenger conveyor handrail (30) is driven by a device (40) including a toothed drive belt (42). An example drive belt has a plurality of teeth (46) with an at least partially concave surface (50) for engaging teeth (36) on the handrail (30). A disclosed example also includes at least partially convex projections (52) near an end of each tooth on the drive belt (42). A driven surface (48) of the drive belt (42) includes a plurality of grooves (70) arranged to allow the drive belt to slip relative to a drive wheel (60) under certain loading conditions. The disclosed example arrangement facilitates proper engagement between a drive belt (42) and a toothed handrail (30) while avoiding vertical separation forces between them, which allows for eliminating pinching rollers that would otherwise engage a gripping surface (32) on the handrail (30).
Abstract:
A passenger conveyor (20) includes a handrail assembly (30) comprising a handrail (32) having a plurality of co-extruded polymer materials (34, 36). In one example, an outermost portion (34) establishes a passenger gripping surface (38). One example includes an extruded soft, low cost polymer in the middle of the handrail cross section to reduce cost and weight. A disclosed example includes a toothed driving surface (40) on an inner side made of a selected one of the polymer materials (34, 36). In one example, the driving surface (40) and the gripping surface (38) comprise the same polymer material.
Abstract:
A plurality of stepchain links (30, 130, 230)of a passenger conveyor system (20) connected to form a continuous loop are from die cast or from stamped or laser cut metal. Each stepchain link (30, 130, 230) includes a plurality of teeth (32, 132, 232) made of a single piece of material that engage a drive member (36). In one example, a plate of injection molded plastic teeth (294) are snapped onto the links to reduce corrosion.
Abstract:
An exemplary assembly includes at least one elongated tension member (26). A jacket (34) covers at least some of the tension member (32). The polymer jacket (34) comprises a polymer material including a melamine based geometry stabilizer that facilitates maintaining the jacket material near the tension member if the assembly is subjected to a high temperature condition.
Abstract:
A passenger conveyor handrail (30) has a gripping surface (32, 42, 52, 62, 72, 82) with a generally circular cross-section. Disclosed examples include a toothed driven surface (34, 44, 54, 64, 74, 84) that is adapted to be engaged by a toothed driving member (28) for propelling the handrail in a desired direction. Disclosed examples include having the generally circular cross-section extend along an entire length of the handrail (30) corresponding to the closed loop path followed by the handrail during operation of a corresponding passenger conveyor.
Abstract:
Making a passenger handrail (30) includes splicing together ends (58) of handrail stock. A disclosed device (50) includes mounting members (54), (56) for positioning the ends (58) of the handrail stock relative to each other before splicing them together. Example mounting members (54), (56) include position control members (80) having at least one tooth (82) for engaging a tooth (36) on a driven surface (34) of the handrail. A disclosed example includes a mover (62) having a threaded rod (66) that causes a follower (68) to move with the mounting member (54) for adjusting a position of the mounting member and the corresponding end (58) of the handrail stock within very stringent tolerance requirements.
Abstract:
A load bearing assembly (20) includes a plurality of tension members (22). A joint in the load bearing assembly (20) has a staggered pattern of discontinuities (30) in the tension members (22). A stress relieving feature is associated with at least outermost tension members (22A, 22L) in the vicinity of the discontinuities. One example includes supplemental tension members (32, 50) as the stress relieving feature. Another example includes selected spacings (32', 40, 42) between ends of at least some of the tension members. One example includes different sized tension members as the stress relieving feature. Another example includes different lateral spacings between selected tension members.
Abstract:
A passenger interface device (20) includes at least one input member (22, 24, 26) having a contact surface (28) that is adapted to be touched by an individual. A disinfectant (30) is on the contact surface (28). The disinfectant (30) comprises a radiation-activated material. A source of radiation (32) irradiates the disinfectant (30) to disinfect the contact surface of the passenger interface device. In one example, titanium dioxide is used as a photocatalyst that disinfects the contact surface responsive to ultraviolet light radiation.