the opposite sides of the cylindrical portion 110 it follows that the particular ratchet tooth 82e is also engaged being directly opposite the tooth 82a on the disk or panel portion 78 of the lower cup shaped member or half 60 the initial contact of the pin 116 with the teeth 82a and 82e does not cause any movement of the ratchet half 60 and actually the entire ratchet mechanism 56 in that the lower half 60 is connected to the upper half 58 by means of the screws 46 recapitulating fig7 and also fig1 visually indicate what occurs when the person continues to press downwardly on the top of the receptacle 48 it will be well to indicate by the arrow 126 in fig1 the downward motion of the pin 116 it should be borne in mind that the pin 116 owing to it being mounted on the stem or plunger 108 is forced against the sloping or angled cam surfaces 84 belonging to the teeth 82a and 82e close comparison of fig1 and 17 will reveal that the cam action derived from the forced downward travel of the pin 116 causes the tooth 82a and also the tooth 82e to be shifted since the tooth 82a and the tooth.