Educational clock assembly

Details Educational clock assembly Educational clock assembly

1995-10-19

1997-02-18

Roskoski, Bernard

Horology: time measuring systems or devices

Displays or display device details

368232, 434304, G04B 1900

Patent

active

056047177

ABSTRACT:
An educational clock assembly includes a clock mechanism, a circular face plate, and a fastening ring. The circular face plate is formed of a plurality of modular pieces and has a central receiving hole into which the clock mechanism is press-fitted, a plurality of first grooves which are spaced angularly and equally on the circumference of the face plate. Each of the first grooves has a hour-piece which engages detachably in the first groove and which bears a hour numeral. The fastening ring engages around the circumference of the face plate in order to bind the modular pieces together. The inner periphery of the fastening ring has a plurality of second grooves. Each of the second grooves is aligned radially with a corresponding one the first grooves of the face plate and has a minute-piece which engages detachably in the second groove and which bears a minute numeral.

REFERENCES:
patent: 4361328 (1982-11-01), Stein et al.
patent: 4629431 (1986-12-01), Sanders
patent: 4731025 (1988-03-01), Taylor
patent: 4993006 (1991-02-01), Oshima et al.
patent: 5044961 (1991-09-01), Bruskewitz
patent: 5105397 (1992-04-01), Whitney

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