摘要:
A display board is defined by a front panel, a rear panel and material sandwiched between the front and rear panels. The front panel includes at least one card-holding portion that includes a plurality of slotted portions sized for retaining at least one card and in which the backing material includes at least one recess that is sized and indexed with the slotted portions of the at least one card-holding portion.
摘要:
A magnetic bearing assembly for a rotatable support apparatus includes a first stationary section, a second section disposed on the first section and a shaft member secured to the base section and passing through the first section. The shaft member defines an axle for rotation for the first section wherein the magnetic bearing assembly is defined by at least one pair of magnets disposed in relation to the shaft member, the at least one pair of magnets including magnetic face surfaces aligned such that a repelling field is established between the at least one pair of magnets, wherein the first section is attached to at least one of the magnets.
摘要:
A rigid panel has projecting from the planar face thereof an elongate, transparent housing open at opposite ends and having an elongate slot in the underside thereof. Mounted in the housing is an elongate, transparent, flexible retainer comprising a strip of flexible, transparent acetate material which is generally U-shaped in cross section, and which has a portion thereof urged resiliently and removably against the face of the panel. The upper edge of a document may be inserted through the slot in the housing and between the panel face and the overlying portion of the retainer strip which retains the document removably and permits all information thereon to be observed through the transparent housing and retainer strip. In a second embodiment the acetate material is wound helically to produce a generally cylindrically-shaped, tubular retainer which is compressed radially to a generally oval cross sectional configuration and is inserted removably into the housing through one end thereof and is allowed to expand radially. A portion of the outer surface of the retainer is urged resiliently against the face of the panel to provide the means for retaining the upper edge of a document in the housing.
摘要:
The clamp comprises a strip of heat-settable plastic which has two spaced, parallel strip magnets secured on one surface thereof, and which is bent into generally U-shaped configuration, for example by directing a heat Knife onto the plastic strip medially of the space between said magnets, while folding opposite ends of the strip toward each other until the two magnets are placed in registering engagement with each other. After the plastic strip has been folded it is cooled to heat set the radiused fold, which thereby helps to retain the clamp closed and the magnets in engagement with each other.
摘要:
The holder includes a sheet metal housing having a back wall, parallel side walls, and a horizontal bottom wall removably secured to and closing the lower end of the housing. A plurality of spaced partitions are removably and slidably supported in the housing in parallel planes extending normal to the side walls, and diagonally of the back wall. These partitions define therebetween a plurality of document holding spaces that are inclined to the vertical, and which are closed at their lower ends, and open at their upper ends on a large opening formed in the front of the housing. Flange sections on the upper edges of the housing end walls releasably overlie portions of the upper edge of the uppermost partition to prevent its removal, and thus the partitions located therebeneath.
摘要:
The jacket has flexible front and rear walls which are connected together along the bottom and one side of the jacket, but which are separable from each other along the top and other side of the jacket to enable a document to be inserted between, or to be removed from between the front and rear walls. The rear wall has secured to the back thereof two, flexible magnetic strips for removably securing the upper and lower ends of the back wall against the face of a ferrous metal panel. The front wall, which is transparent extends slightly beyond the back wall adjacent the top and other side of the jacket and has secured to the back thereof along its upper edge another flexible magnetic strip which releasably engages the face of the supporting panel to hold the jacket closed when mounted on the panel.
摘要:
Viewing screen and display apparatus including a housing for concealing the viewing screen when not in use, and a lifting assembly having a pair of lifting arms mounted slidably on a pair of tracks inside the housing and being tiltable outwardly. When raising of the viewing screen is desired, the viewing screen casing is tilted outwardly and a cable is pulled to lift the viewing screen casing to a desired height. The cable may be locked in any suitable position to keep the screen casing in a suitable elevation. The viewing screen, which nornally is rolled up within the casing, includes a magnetic strip which can be used to retain the viewing screen in a proper extended position for use.