Rotary indexing indicia-carrying mechanism
作者： Lloyd L Robbins
DOI:
关键词: Rotation 、 Mechanism (engineering) 、 Acoustics 、 Search engine indexing 、 Materials science
摘要: DISCLOSED IS INDICIA DISPLAYING APPARATUS COMPRISING A PAIR OF DISKS AT LEAST ONE WHICH TRANSPARENT HAVING SANDWICHED THEREBETWEEN INDICIA-CARRYING MEANS. THE ARE ROTATABLE WITH RESPECT TO EACH OTHER AND BY SUCH ROTATION MEANS MANIPULATED SO AS SELECTIVELY DISPLAY PREDETERMINED PORTION SAID DESIRED USER.
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