Abstract: A noise barrier wall is provided which has a main wall body standing generally vertically and provided atop thereof with a first sound absorbing unit, and on a side thereof opposite to a noise source with an overhang extending away from the noise source and of which the free end is directed upward and provided at an end thereof with a second sound absorbing unit. Each of the first and second sound absorbing units comprises two branch walls extending obliquely upward to the left and right, respectively. Each of the two branch walls is provided with an additional branch wall. These additional branch walls extend obliquely upward towards each other. An opening is defined between free ends of the additional branch walls.

Abstract: A noise control apparatus adapted for installation on top of a straight upright sound barrier, existing or newly erected, is provided which comprises a main body formed from a first screen inclined towards a sound source and a second screen inclined away from the sound source to have a generally V-shaped cross section; the first screen having formed at the top thereof a first additional screen inclined away from the sound source; the second screen having formed at the top thereof a second additional screen inclined towards the sound source; and the distance between free ends of the first and second additional screens being 55 to 88% of that between the tops of the first and second screens. This sound barrier structure has a highly improved effect of noise control while being very compact and lightweight.

Abstract: A noise barrier includes upright-standing support columns spaced a predetermine distance from each other and each made of an H section, and a plurality of wall panels provided between two neighboring ones of the support columns by inserting each wall panel at opposite lateral edges thereof from above into U-shaped recesses, opposite to each other, of the support columns, the plurality of wall panels being thus stacked one on another to form a main soundproof wall, and a noise control module to be installed on the topmost wall panel, the noise control module comprising side frame members to be inserted at lower ends thereof from above into the upper portions of the U-shaped recesses, opposite to each other, of the support columns; a lower frame member connecting the side frame members to each other by securing them at lower ends thereof to the lower frame member; first and second additional screens installed at lower ends thereof pivotably to the lower frame member and having a horizontal length smaller than t

Abstract: The present invention provides an antenna equipment for a wireless access control system, which includes a plurality of print substrates which are stacked in a unitary assembly; and a plurality of coil patterns each of which has a starting end and a terminating end, the patterns being respectively formed on the plurality of print substrates; wherein each of the plurality of coil patterns are connected each other at at least one of the starting end and the terminating end thereof.

Abstract: A soundproof wall has a main wall, a first branch wall extending in a substantially vertical direction from a top of the main wall, a second branch wall extending obliquely from the main wall in a direction away from a noise source, and a third branch wall extending obliquely from an intermediate portion of the second branch wall in a direction toward the noise source. Another embodiment of the invention includes a horizontal branch extending from the main wall in a direction away from the noise source and supporting the second branch wall.

Abstract: A novel and improved soundproof wall is disclosed comprising a main wall rising from the ground, a first branch wall provided atop the main wall and inclined toward a noise source and a second branch wall provided atop the main wall and inclined away from the noise source. In addition, a subordinate branch wall is provided on at least one of the first and second branch walls and extending in a direction other than that of the branch wall.

Abstract: A radio analog sensor for transmitting analog signals of a temperature or smoke density to a remote place by radio is used as each of sub devices 12-1 to 12-n. When a change of the analog detection signals of a temperature, a smoke density or the like, which is detected by the analog sensor 10 connected to each of the sub devices, is greater than a predetermined value, the analog signals which have been so far stored in a memory are collectively transmitted to the receiver side by radio. Periodic information is also sent from each of the sub devices 12-1 to 12-n once every two hours so as to supervise the state of the sensors. This permits reliable transmission of necessary data to a remote place without decreasing the life of the battery.

Abstract: A noise reducing apparatus comprising a first passageway group consisting of a plurality of first passageways aligned in parallel with each other for forming a first flat wave A by sound waves having a first same phase passed through each first passageway from a sound source, and a second passageway group consisting of a plurality of second passageways aligned in parallel with each other for forming a second flat wave B by sound waves being a second same phase passed through each second passageway from the sound source, said first passageway group having positioned above said second passageway group, and the phase of said first flat wave being advanced by a phase difference of 240.degree..+-.60.degree. with respect to the phase of said second flat wave to thereby reduce noise emitted from the sound source by interference of the first and second flat waves A and B.

Abstract: A radio alarm system for detecting abnormalities such as a fire having a central unit which is adapted to receive and decode the radio signal transmitted from each terminal device and to give an alarm and a plurality of terminal devices which is connected to a detector for detecting an abnormal state and is adapted to transmit information in the form of a radio signal based on an abnormality detection signal from the respective associated detector. And delay times which vary from terminal device to terminal device are set, and the selection of a free channel for transmission is effected in each terminal device by performing carrier sensing over a delay time peculiar to that terminal device.

Abstract: A noise reducing device for printers including a noise reducing hollow body consisting of at least one hollow duct at one side of a sheet delivery opening opposedly arranged to a printed sheet guiding-receiving member positioned at the other side of the sheet delivery opening, and the hollow duct is oriented such that a noise outlet thereof is opened towards the upper surface of the sheet guiding-receiving member.

Abstract: This invention discloses elements for constructing a three-dimensional structure, comprising beams that make edges, polygonal plates that make faces and joints with arms that connect said beams and/or polygonal plates with each other so that a desired structure is formed, wherein the end of said joint arms is formed into a spherical shape and bearings which have a grasping means for said spherical and of said joint arms are provided to said beams and polygonal plates so that any of said bearings can be engaged or disengaged with it freely; said joints are formed into at least two shapes from an elastic material so that they can be used singly or in conjunction with the other in connecting said beams and/or polygonal plates; and hooks are provided to each side of said polygonal plates so that said hooks can hold said beams by their sides.

Abstract: When a transmitter receives an abnormal detection signal from a leaked gas alarm or the like, the transmitter starts the transmitting operation and repeatedly transmits the detection information together with the address information by a radio wave for a constant transmitting operation time interval. A receiver is of the intermittent reception type whereby the receiving operation is performed at every constant idle time, thereby preventing a consumption of a power source of a battery. When the transmitting radio wave is received at a timing of the intermittent reception, the receiving operation is continued and an alarm signal is generated on the basis of the last information which is transmitted due to the single transmitting operation, thereby allowing an alarm representing the leakage of gas to be generated and closing a gas shut-off valve, or the like.