Abstract: An accessory mountable on and demountable from a camera body includes a first mount unit including a plurality of first bayonet claw portions, a second mount unit including a plurality of second bayonet claw portions configured to be engaged with the plurality of first bayonet claw portions, an elastic member configured to contact the camera body when the accessory is mounted on the camera body, and a holding member configured to hold the elastic member. The holding member is provided with a recessed portion which a part of the elastic member can enter when the accessory is mounted on the camera body.

Abstract: An extension socket structure includes a positioning sleeve, which has a front face with an opening disposed thereon and a rear face having a plurality of positioning slots disposed thereon, and an extension socket being inserted in the positioning sleeve for a socket panel of the body of the extension socket to protrude from the opening of the positioning sleeve. Thus it allows for an insertion of a plug of an electrical appliance to the extension socket. Besides, a bottom of the positioning sleeve is coupled to a cone for fixing the extension socket to a lawn or sands to provide outdoor use. When the extension socket is not in use, a wire of the extension socket can be wound along the plurality of positioning slots of the rear face of the positioning sleeve to let the positioning sleeve to act as a collecting wheel.

Abstract: A housing to secure a device to a panel. The housing has a case, a locking ring and a nut. The locking ring has locking protrusions that help to prevent the housing from coming loose from the panel. The case may also have a keyway and the locking ring a corresponding key. The nut may also have detents to engage the locking protrusions on one side of the locking ring.

Abstract: A lamp socket assembly having a groove in the cap which matches a ridge in the cover to assist in tightening the assembly. A typical heat lamp assembly has a husk holding the socket which holds the heat lamp and a cap is affixed to the top of the husk. The cap has a groove cut in it which matches a ridge formed on the cover member which is held over the husk and the heat lamp. Thus, one can tighten the husk within the cover by simply holding the stem and turning the cover. The cover, in turn, turns the cap and the husk to tighten the flange against the cover.

Abstract: An electrical receptacle assembly for attachment to a luminaire housing comprises a housing defining a plurality of contact seating channels extending therethrough along axes parallel to a contact member insertion axis, electrical contact members being seated in the housing channels individually along the axes parallel to the contact member insertion axis. A clamp member is joined to the housing by a threaded fastener. The housing defines an anti-rotation member resident in the clamp member which prevents the clamp member from rotational movement relative to the housing upon tightening the threaded fastener.

Abstract: A contact pin subassembly including a plurality of contact pins, a contact pin holder which holds the contact pins and which is provided with a plurality of insulation ring portions in which the associated contact pins are slidably fitted, and springs which are held in the contact pin holder to bias the contact pins outward from the insulation ring portions. The contact pins subassembly may be combined into an assembly with a camera body, a lens, or some other subassembly of a device or instrument which requires contact pins, by mounting to the respective subassembly.

Abstract: An apparatus is provided for simultaneously electrically grounding and mechanical securing an electric device to an overhead support which comprises a generally downwardly depending downrod attached to the support; a coupling for engaging the lower end portion of the downrod to an upwardly extending hub with the mutually interfitting walls of the downrod end and the hub coupled in a male-female jointed configuration; a pair of openings in opposite sides of each of the interfitting walls, which openings are aligned; and a rod extending through the aligned openings, which rod has a head at one end in contact with the outer surface of the inner of the downrod and the hub and a thread portion opposite to the head for engaging an internal thread of the opposite opening in the outer of the downrod and hub. The apparatus ensures electrical grounding continuity and at the same time establishes a secure mounting configuration.