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and shifting member in communication with the other two members. 4. A telephonometer comprising a bent sealed tube and a measuring element easily 5 movabLe therein, said tube having a gradu- ated measuring member and record preserv- ing member disposed at right angles to said measuring member and a constricted por- tion separating and connecting said mem- 10 bers and controlling the passing of said measuring element from said measuring member to. said record preserving member. 5. A telephonometer comprising a sealed receptacle of transparent material having a 15 graduated measuring member, a graduated record preserving member at an angle of less than 180 degrees to said measuring member, a measuring element movable from one member of the receptacle to the other, Copies of this patent may be obtained for five cents
and a constricted portion connecting the two 20 members of said receptacle and regulating the passage of said measuring element from one member to the other. 6. A telephonometer having means for measuring the time of use of a telephone 25 consisting of a bent .sealed tubular measur- ing member and a mobile measuring ele- ment therein, a sealed tubular record pre- serving member disposed at right angles to said measuring member, and a constricted 30 portion connecting said members and adapt- ed to control the passage of said mobile measuring element from one member to the other. In testimony whereof I set my hand this 35 14th day of February, 1918. FRANK GRAY. each, by addressing the "Commissioner of Patents, ton, D. C.'