摘要:
Provided herein are devices and system to magnetically, rotably secure a lens filter to a camera. Generally the devices and systems comprise a magnet assembly and a lens filter assembly threadably engageable. Also provided are magnetic lens filter systems comprising the engaged magnet and lens filter assemblies and an attachment assembly securable around a camera lens and magnetically attachable to the magnet comprising the magnetic lens filter, magnetic adapter assembly or magnetic adapter. Further provided are camera systems comprising the magnetic lens filter systems rotatably affixed thereto.
摘要:
The invention relates to a medical instrument consisting of at least two instrument parts, which is provided with a coupling for releasably connecting the two instrument parts, wherein the coupling having a locking element which may be moved between a released and a locked position, as well as at least one magnet element which produces a magnetic restoring force which retains the locking element in the locked position.
摘要:
A magnifier for use in needlework. The magnifier has magnets at each end to allow the magnifier to stick to the usual magnet board over a graph or pattern being worked on. A reference line on the magnifier provides a convenient way to keep the place being worked on, and allows a person to see above and below the line to keep the work in context with the entire pattern.
摘要:
A reflecting device for use with a vehicle having a front and/or rear windshield having a peripheral frame of magnetizable material. The device includes a support member which is configured to define a border around the windshield. The support member is mounted on one face to the frame by a plurality of magnets embedded in the member. Light reflecting material is disposed on the other face of the support member.
摘要:
Sign means including a plastic sign plate emboss formed of thin sheet plastic and having raised luminescent lettering forming a word for communicating a message of distress or information. The sign means includes a permanent magnet strip fixed to the backside of the sign plate for temporary attachment thereof to the exterior surface of a wrecked or stalled automobile on a highway or thoroughfare.
摘要:
1,208,746. Optical instruments. D.P. BUSHNELL. Dec. 12, 1967 [Jan. 26, 1967], No. 56323/67. Heading G2J. An optical instrument, e.g. binoculars, comprises an image erecting system of 4 mirrors 16, 17, (18), 19 located between objective 15 and eye lens 40 systems, the combination of lenses and mirrors being held in place by a foamed plastics support 43 which was moulded about said combination. The objective and eye lenses are themselves in mountings which are initially aligned with a stepped plate 26 having orifices 27, (28), 29 for the light path through the binoculars, the foamed plastics supported being moulded into place after alignment. The foamed support 43 not only encloses the lens mountings but also is in contact with the back faces of the mirrors. As a finish the moulded support can be given a plastic covering 44. A negative lens 34 is mounted between the mirrors and the eye lens in a ferromagnetic ring 35 slidable inside the eye lens mounting 33. A magnetic ring 50 mounted externally of mounting 33 and concentric with ring 35 provides a focusing means, since movement of magnetic ring 50 along mount 33 causes movement of lens 34. In an alternative embodiment the four mirrors are replaced by a pair of Porro prisms, the foamed plastics support being moulded about the non- transmittive surfaces of the prisms. Focusing in this embodiment is affected by a threaded magnetic ring movable about the objective mounting piece to slidably move a negative lens within that mounting.