Abstract: An advertising tool or sales aid for use in explaining characteristics of a product to a customer, characterized by a case having a top and bottom wall connected by a side wall and being opened at each end and the other side, a plurality of plates which have one end mounted in the case so that the plate can be pivoted from a position in the case to a position extending out of the case. Each of the plates can contain information and/or physical representations, which can be used to stress characteristics of the product being sold.

Abstract: A record player for use with a stationary conventional record disc having a sprial sound groove with signals recorded therein includes a movable body which is placed on the record disc, a drive assembly for causing the movable body to travel over the record disc, a pick-up or cartridge pivotally mounted at the underside of the movable body for engaging the sound groove and reproducing the signals recorded therein while tracking the spiral sound groove as the movable body travels on the record disc, and an arrangement for controlling the travel on the movable body relative to the record disc in response to pivotal movement of the pick-up.