Frequency deviation meter for timepieces
OwnerW. Jorge Sitkewich, Sanford Rothinventors
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Abstract
A frequency deviation meter provides a display of the error in a timepiece's internal oscillator, and includes a plurality of pickup devices among which are electrostatic and ultrasonic detectors. Frequency of the timepiece's oscillator and the frequency error is displayed as seconds lost or gained per month. An elongated aluminum alloy resonant column of tool stock material having a crystal pickup provides a sensitive vibration detector assembly.
Claims18
A frequency deviation meter for determining the error of a timepiece internal oscillator comprising:
- (a) resonant sensor column means for picking up ultrasonic radiation from a timepiece internal oscillator,
- (b) an amplifier circuit connected to the output of said resonant column for amplifying the signal detected by the resonant column,
- (c) a reference oscillator connected in circuit with the amplifier,
- (d) a frequency comparator connected in circuit with the oscillator and amplifier circuit, for comparing the frequency of the reference oscillator to that of the output amplifier, and
- (e) display means connected to the output of said frequency comparator for indicating the output of said frequency comparator.
An ultrasonic detector for a frequency deviation meter which measures vibrations, comprising:
- (a) a resonant column of material of good vibration transmitting characteristics having firmly supported fixed end with a constant surface which engages a member from which vibration emanates,
- (b) a vibration detector device positioned on said resonant column within an area of vibration convergence transmitted from said surface.
A timepiece oscillator detector, comprising:
- (a) a housing having an upper generally flat surface having a conductive resilient covering thereon,
- (b) the surface and the covering having aligned central openings therethrough,
- (c) an electrostatic detector disposed adjacent the periphery of the openings,
- (d) a resonant sensor column protruding through the opening in said surface member, and
- (e) the resonant sensor column having a contact surface which is in substantially the same plane as the upper surface of said conductive resilient covering.
A frequency deviation meter for determining the error of a timepiece internal oscillator, comprising:
- (a) a detector means with plural output channels for detecting the frequency of a timepiece oscillator,
- (b) an amplifier connected to the outputs of said detector means for amplifying the output channels from said detector means,
- (c) a multichannel selecting means associated with said amplifier for selecting the desired frequency signals from said amplifier and feeding the resultant output signal to a frequency comparator,
- (d) a reference oscillator,
- (e) a frequency comparator associated with the reference oscillator and multichannel selecting means for comparing the frequency of the reference oscillator to that of the resultant output of said selecting means, and
- (f) display means connected to the output of said frequency comparator to indicate the output from said frequency comparator.
Dependencies are inferred from the claim text.