Abstract: A surgical light includes a light guide plate and a plurality of LEDs. The light guide plate has a light incident surface, a reflecting surface and a light exit surface. The reflecting surface defines an optical axis passing through the center of the light guide plate. A plurality of reflecting structures are formed on the reflecting surface, and are distributed symmetrically about the optical axis. The light emitted by the plurality of LEDs enters the light guide plate in the same direction, is then reflected by the reflecting structures, and exits from the light exit surface. The exited light defines a plurality of focal points, which are spaced apart from the conducting plate at different distances and cooperatively define a predetermined depth of focus so that an object within the depth of focus can receive adequate luminous intensity.

Abstract: A blast proof apparatus for the coin return cavity of a public phone, having the embodiment of the coin return cavity cover comprises an inner cover and an outer cover; a spring element between the said inner cover and the outer cover forming an elastic force to bind the two covers closely contact with each other, a plurality of through holes formed on the surface of the inner cover, the said cover combination being then placed to the coin return mouth by a pivot so the cover is able to be pushed inward for money removing process. If an explosion occurs inside the coin return cavity, the high pressure formed by the explosion pushes the outer cover outward through the through holes on the inner cover and is released in order to avoid possible damages in the coin return apparatus.

Abstract: A coin reception mechanism includes a base fixed inside for example a pay phone to receive coins for operating the pay phone. The coin reception mechanism includes a chute assembly including a first plate and a second plate which are independent of each other and are both pivoted to the base in such a manner to form a spacing therebetween defining a coin chute leading to a coin collector container. The first plate has a coin slot formed thereon to be substantially in alignment with the coin chute for receiving and guiding a coin into the coin chute.

Abstract: A pay phone coin release mechanism includes a base plate fixed inside the pay phone casing and having a pivot pin extending therefrom to rotatably supported thereon a driven link having two opposite arms of which one has a pin formed thereon and the other one rotatably supports thereon a coin release roller adapted to cooperate with a conventional coin receiving mechanism. The base plate also has a hole through which a shaft rotatably extends to drivingly engage a driving link. The driving link has an elongated slot into which the pin of the driven link extends and drivingly engages. The shaft of the driving link extends outside the pay phone casing and connected to a user-actuateable lever so that by actuating the lever, the driving link is rotated to drive, through the connection between the elongated slot and the pin, the driven link to rotate about the pivot.

Abstract: A reinforced pay phone casing structure includes an outer casing member having a plurality of openings formed thereon for movably receiving therein dial buttons and an inner reinforcement plate fixed to an inside surface of the casing member by means of welding. The inner reinforcement plate has an opening corresponding to and covering the plurality of dial button openings of the outer casing member. A circuit board shielding plate is fixed to the inner reinforcement plate and the outer casing member by means of bolts. A dial button bezel defining therethrough a plurality of passages for movably receiving therein the dial buttons is arranged between the inner reinforcement plate and the circuit board shielding plate with the bezel received within the opening of the inner reinforcement plate to have the dial button partially extending out of the outer casing member.