Abstract: A hinge mechanism is provided, including a rotary member, a first member, a second member, a first shaft, and a first slider. The first member has a first guiding channel. The second member pivotally connects to the first member and has a first recess. The first shaft pivotally connects the rotary member and the first member, wherein the first shaft has a first cavity. The first slider is movable between the first recess and the first cavity. When the first slider is located in the first recess, the first member is prohibited from rotating relative to the second member by the first slider. When the first slider slides from the first recess along the first guiding channel to the first cavity, the rotary member is prohibited from rotating relative to the first member by the first slider.

Abstract: The present invention intends to provide a two-dimensional photonic crystal resonator having a high Q-value. The slab-shaped body 21 is provided with cyclically arranged holes 22. The body 21 is divided into three areas 31-33 with the holes 22 arranged with cycle distances of a1 in area 31 and a2 in areas 32 and 33, which is smaller than a1. A waveguide 23 passing through the three areas is formed by linearly eliminating the holes 22. The waveguide 23 thus formed can propagate rays of light within a wavelength band that depends on the cycle distance of the holes 22. The cycle distance of the holes in the area 31 differs from that of the areas 32 and 33, and the wavelength band of the light propagating through the waveguide accordingly differs.

Abstract: A track link is provided for use with a track chain assembly. Each track link is provided with a mounting plate attached to its ground-engaging side, a track plate adapted to contiguously engage the mounting plate, and a removable fastening device to secure the track plate to the mounting plate.

Abstract: The invention provides a ground engaging element for a wheel or endless track which element has a hollow longitudinal body of flexible material to extend across the wheel or track. The hollow body has a pair of longitudinal side walls and an outer longitudinal face for contacting the ground as well as first and second mounting flanges. The first mounting flange extends outwardly of the hollow body and has a mounting face to contact the wheel or track base. The second mounting flange is disposed between the side walls and has a face disposable in spaced relationship to the base whereby the first mounting flange of a similar, neighboring ground engaging element can be received under the face of the second mounting flange. Neighboring ground engaging elements can be mounted on the wheel or track with the side walls in contact to provide mutual support under ground engaging loads.

Abstract: A pinless haulage drive chain formed of a series of rack-form link components each having complementary shaped parts at opposite ends, one end of which has a projection of T-shaped in plan view and the other end having a recess of T-shape in plan view to receive as a clearance fit the projection of an adjoining link component. Each link component also has a central spine of upstanding rack formation and integral therewith on either side thereof two walls forming a saddle having a wall of lesser depth to be used as a trapping means for a mineral mining machine on its traverse along a conveyor, and a deeper wall to be encompassed by trapping means for the link itself via a shoulder extending from this wall. The chain may be used in a scraper chain conveyor comprising conveyor line pans having a range of movement therebetween.

Abstract: A modular plastic conveying belt (10) is disclosed. The belt (10) is comprised of a plurality of plastic belt modules (14) releasably connected to one another to form an extended belt. Each module (14) has an upper surface (26), a lower surface (28), a first and a second (16, 18) and extending transversely of the conveying direction of the belt and a pair of opposed sides (22, 24). A plurality of lugs (38), attached to lug bars (30), are disposed along the first end. A plurality of lug receiving elements (32) are disposed along the second end (18) and releasably receive lugs (30) of an adjacent module (14).

Abstract: An improved articulate chain (10) including pivotally interconnected sections (12,14,16) of spaced, coacting links (18,20,22) having the chain driving members (54) intermediate the pivot connections (58,60) to reduce the chain loads thereon. The links (18,20,22) are locked together in a common plane (56) by integral externally splined projections (82) extending therefrom into the internally splined drive bushing (96) to resist torque loads and increase the structural integrity of the chain (10). The links (18,20,22) are releasably coupled together to permit expeditious disassembly and reassembly thereof for servicing.

Abstract: An endless track concept particularly adapted for a tracked vehicle toy having no track tensioning means and wherein the track is characterized by its simple and economical construction, as required for a toy. This endless track includes a plurality of simply interconnected links, with each link being made solely of a length of wire bent into a generally U-shape configuration.