SU146705A1 - Device for checking daily clock travel - Google Patents

Description

The known devices for checking the daily running of the clock with a slotted rotating screen for fixing the position of the minute and second hands — checked clocks, the time standard for generating standard time pulses and the clock setting cassette do not allow to determine the errors of the average daily run of clocks. there is a memory device with recording of the results on a magnetic tape on a binary number system separately for the second and minute hands, counting its devices with magnetic reading heads, visual control counters and a block for recording results are measured by numbers on a paper tape.

The drawing shows a schematic diagram of the device. The image of the checked clock /, illuminated by the light source 2, is projected by the lens 3 through the 4 Amichi prism onto the screen 5.

The screen 5 is provided with a slit slot located along the radius, the center of the circle of which coincides with the center of the projected image of the clock. Behind the screen 5 there is a photo cell or a photomultiplier 6. Amici prism 4 rotates around its longitudinal axis by a motor 7 connected by a gear with sleeves of differentials 8. The outputs (sun wheels) of differentials 8 are connected to binary sensors 9. The inputs of differentials S are interconnected by a gear reducer with a ratio of / 60 and driven into rotation by a synchronous motor / O fed from a current source with a stabilized frequency. When the motor 7 rotates, prism 4 Amshi and axis of binary sensors 9 rotate. Rotation of prism 4 causes rotation of the image of the checked clock 1 on the screen 5 - One turn of the clock image corresponds to one revolution of the axes of the binary sensors 9. At the moments of overlap of the slit slot of the screen 5 of the image 146705-2, the arrows of the tested clock sharply change / there is a sharp change in the photocell illumination 6 The appearance of pulses at the output of the amplifier / 7. The binary sensors 9 generate the Gray code in the binary number system and send it to the discharging circuit. When a pulse occurs, the valve 12 in the discharge circuit opens at the output of the amplifier // and passes the code to the memory selector 13, where the code is stored when the pulse disappears at the amplifier output, //. When checking the clock with the central second hand for one turn of the clock image, three impulses from the hour, minute and second hands appear at the amplifier output // three codes will be stored in the memory of the selector J3.

The memory of the selector 13 from binary sensors 9 receives codes determined by the time difference indicated by the clock being checked / and by the time standard (motor W) entering the binary sensors 9, i.e. the error codes of the clock being checked. The selector 13 opens the valve M when arriving in it the same time code. The error code of the second hand enters the discharge circuits on the electromagnets 15, excites them, and the electromagnets record the code on a special ferromagnetic film / 5 in the form of magnetized and unmagnetized sections.

Similarly, the error of the mini-hand stroke is recorded on the same film, as the daily clock errors can exceed 1 minute.

In order to avoid spurious measurements that may occur when the arrows coincide, a pulse counter (7 pulses) is inserted into the circuit, opening valve 18, through which the control pulse passes only when the even pulse from the second pulse is received by one revolution of the clock image , minute and hour hands. When valve 14 is opened, a pulse is simultaneously given to the end of the measurement and recording process, including a mechanism for moving the cassette in which the checked clock is placed (not shown) The device can provide a positive effect, since it allows to automate the process of calculating errors from the exact and daily average.

Subject invention

A device for checking the daily running of a clock with a slotted rotating screen for fixing the position of the second and minute hands of the watched clock, a standard of time for generating standard time pulses and a cassette for setting the clock, which, in order to automate and improve the control process, calculate the error average daily run and fixation of measurement results; a memory device was applied with recording the measurement results on a magnetic tape using a binary number system separately for second and minute hands, a calculating device with magnetic reading heads, visual control counters and a unit for recording measurement results on paper tape.

Cassette Drive

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Discharge chains

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