Abstract: In a connector in which a conductive contacting portion (33) is supported by a spring portion (26) to be elastically movable in a first direction (28) and a second direction (29) perpendicular to the first direction, the contacting portion has a contact point (27) maintained in a specific condition such that the contact point is offset from a predetermined position in the second direction. The contact point is formed at its one end to be brought into contact with a mating object (17) in the first direction at the predetermined position. When the contacting portion is moved in a direction opposite to the first direction, the specific condition is released.

Abstract: Disclosed is a transparent plastic sheet obtained by co-polymerizing 100 parts by weight of methyl methacrylate with 0.1 to 2.0 parts by weight of methacrylic acid and 0.1 to 1.5 parts by weight of glycidyl methacrylate, and having a thickness of not greater than 4 inches, wherein the angular deviation satisfies specified conditions according to the thickness of the sheet and wherein the degree of swelling is not greater than 2.50. This transparent plastic sheet shows neither coloring nor sink marks on the surface, has excellent craze resistance and low long-term water absorption percentage, and is hence suitable for use as an aircraft windshield.

Abstract: In a coaxial receptacle connector for receiving an coaxial plug connector having a plug side central contact and a plug side outer contact surrounding the plug side central contact, a receptacle side outer contact and a connection detecting element are placed around a receptacle side central contact to form a substantially cylindrical portion in cooperation with each other with gaps left therebetween in a circumferential direction. The receptacle side central contact is for being brought in contact with the plug side central contact. The receptacle side outer contact is for being brought into contact with the plug side central contact. The connection detecting element for detecting a connection between the coaxial plug connector and the coaxial receptacle connector.