1. Apparatus for producing pulses in a three wire remote meter reading telemetry system, comprising: an integrating meter including a frame and an electroresponsive movement carried by the frame and having an electromagnetically driven rotatable member, said member being rotated at a predetermined rate such that each rotation represents a fixed value of an electrical quantity measured by the meter; and a pulse initiator including a support assembly detachably mounted to said frame of the meter, a gear train system carried in said support assembly including input gear means and an output gear means wherein the output gear means has a predetermined gear ratio relative to the input gear means, said input gear means being rotatably coupled to said rotatable member, a drum assembly rotatably mounted on said support assembly for rotation by said output gear means, said drum assembly including a cylindrical side surface covered by a non-reflecting coating and having two staggered rows of a fixed preselectable number of convex cylindrical reflecting segments substantially equally circumferentially spaced by the nonreflecting coating, and sensing means including first and second radiation responsive source-pickup pairs mounted in said support assembly immediately adjacent said cylindrical side surface in optical register with said first and second rows of the reflecting segments, respectively, each of said pickups of the first and second pairs being alternately activated in response to alternately reflected optical coupling paths between the pickup and the associated source of each pair upon rotation of said drum assembly by the rotatable member such that the alternately activated pickups are effective to initiate pulses corresponding to predetermined quantized amounts of the measured electrical quantity as established by the predetermined rate of said meter, the predetermined gear ratio of said gear train system, and the preselected number of reflecting segments.