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US 5,851,118 AGranted
Digital and analog teaching clock
AssigneeLearning Resources, Inc.
InventorsRichard M. Woldenberg, Yuen Po Man
Life of this patent
Estimating the term…
Abstract
A teaching clock comprising an analog clock face having numeric indicia of hour and minute disposed about its periphery, an hour hand and a minute hand pivotally mounted and substantially centrally disposed proximate to the analog clock face, a digital time display disposed adjacent to the analog clock face, and a gear assembly responsive to movement of the minute hand for conforming a time displayed by the digital time display to a time indicated by the hour hand and the minute hand.
Claims18
A teaching clock comprising:
- an analog clock face having numeric indicia of hour and minute disposed about its periphery;
- an hour hand and a minute hand pivotally mounted and substantially centrally disposed proximate to the analog clock face;
- a digital time display disposed adjacent to said analog clock face, wherein said digital time display includes a disk-shaped, digital minute indicator having a numeric minute display and a disk-shaped, digital hour indicator having a numeric hour display, each of said digital indicators having an axis of rotation substantially perpendicular to said analog clock face;
- and
- means responsive to movement of said minute hand for conforming a time displayed by said digital time display to a time indicated by said hour hand and said minute hand.
2 more elements
A teaching clock for instructing students how to tell time comprising:
- a) a face;
- b) an hour hand pivotally mounted over said face and manually rotatable through 360.degree.;
- c) a minute hand pivotally mounted over said face and manually rotatable through 360.degree.;
- d) time indicia on the face;
- and
- e) digital means visible on said face for synchronously displaying the time depicted by the minute hand, the hour hand, and the time indicia on the face of the teaching clock;
- wherein said digital means includes a disk-shaped digital hour indicator which displays an hour representation corresponding to the hour indicated by the hour hand and the time indicia, and a disk-shaped, digital minute indicator which displays a minute representation corresponding to the minutes indicated by the minute hand and the time indicia, said digital indicators each having an axis of rotation substantially perpendicular to said face.
4 more elements
A teaching clock for instructing students how to tell time comprising:
- a) a housing having a front side;
- b) a face applied to the front side of said housing
- c) an hour hand pivotally mounted over said face and manually rotatable through 360.degree.;
- d) a minute hand pivotally mounted over said face and manually rotatable through 360.degree.;
- e) time indicia on the face;
- f) a digital hour indicator which displays an hour representation corresponding to the hour indicated by the hour hand and the time indicia, said digital hour indicator visible on said face;
- g) a digital minute indicator which displays a minute representation corresponding to the minutes indicated by the minute hand and the time indicia, said digital minute indicator visible on said face and operatively connected to said digital hour indicator;
- h) a time incrementing knob behind the face;
- i) a gear assembly for synchronously advancing the hour hand, the minute hand, the digital hour indicator, and the digital minute indicator, the gear assembly including:
- a first gear member operatively coupled to the hour hand, a second gear member having a central portion extending therethrough, with one end of the central portion of said second gear member coupled to the minute hand and the other end of said central portion of said second gear member coupled to said time incrementing knob, the second gear member being operatively connected to the first gear member, a third gear member operatively connected to the second gear member and the first gear member, and a fourth gear member operatively coupled to the second gear member and the digital minute indicator;
- wherein the time incrementing knob engages said hour and minute hands for manually rotating the minute hand and the hour hand, and for synchronously advancing the digital indicators through said gear assembly.
8 more elements
Dependencies are inferred from the claim text.