Abstract: The water-tight watch case is disclosed wherein the case provides a water-tight enclosure for an electronic watch module and wherein the case includes a removable cover portion for providing physical access to the interior of the case for replacement of batteries and the like. The removable cover portion includes a truncated conically tapered sealing ring surface having an angle of taper less than 8.degree. and preferably in the range of 7.degree. to 3.degree. for providing an interference-contact axial press fit with a mating truncated conically tapered surface of the case. A water-tight seal is formed between the cover and the case essentially solely due to the axially pressed interference-contact fit between the pair of mated tapered sealing ring surfaces.

Abstract: A timing pulse generator for testing electronic components such as semiconductor memories, which tests require time accuracy and repeatability.A number of registers are provided for registering digital words which correspond to timing pulses to be generated. Each word includes information in a first portion as to the coarse start time of a particular pulse and information in a second portion as to the fine start time of the pulse. A counter circuit is provided with means for starting and stepping the counter in pedetermined increments through a plurality of states. A digital comparator compares the state of the counter with the coarse start time portion of the word stored in the register and generates an output pulse when the two coincide. A digitally controlled variable delay circuit is provided corresponding to each register. An output from the register corresponding to the fine start time portion of the word sets the amount of delay introduced by the delay circuit.