2408. Atherton, H. Jan. 31. [Addition to 8781/10.] Changing apparatus. -An advertising machine comprises two vertically pivoted shutters c, Fig. 2, which can be forced apart by pressure on a conical button f, Figs. 2 and 3, engaging a recess or space between the shutters, so as to disclose an advertising space b behind them, and one or more springs h for closing the shutters together again when the button is released.
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