Digital clock

Claim 2

A digital clock comprising: a. a rotatable minutes drum having an elongated shaft fixed thereto; b. a rotatable tens of minutes drum having a shaft fixed thereto, said tens of minutes drum and said tens of minutes shaft being coaxial with and mounted for rotation on said minutes shaft; c. a geneva wheel fixed to said tens of minutes shaft for driving said tens of minutes drum; d. an integrally formed gear and tens of minutes geneva driver cam positioned outwardly from said minutes drum and said tens of minutes drum for driving said tens of minutes drum, said tens of minutes geneva driver cam mounted for meshing engagement with said tens of minutes geneva wheel; and e. a gear positioned outwardly from said minutes drum and said tens of minutes drum coaxial with and fixed to said minutes shaft in meshing engagement with the gear integrally formed with said tens of minutes geneva driver cam for driving said tens of minutes geneva driver cam and said tens of minutes geneva wheel.

Claim 3

A digital clock as defined in claim 1 wherein an hours drum is mounted for rotation on said tEns of minutes shaft between said tens of minutes drum and said tens of minutes geneva wheel.

Claim 4

A digital clock comprising: a. a rotatable minutes drum having a shaft fixed thereto; b. a rotatable tens of minutes drum having a shaft fixed thereto, said tens of minutes drum and said tens of minutes shaft being mounted for rotation on said minutes shaft; c. an hours drum mounted for rotation on said tens of minutes shaft; d. a geneva wheel integrally formed with said hours drum for driving said hours drum; e. a geneva wheel fixed to said tens of minutes shaft for driving said tens of minutes drum; f. an hours geneva driver cam mounted for meshing engagement with said hours geneva wheel; g. a tens of minutes geneva driver cam mounted for meshing engagement with said tens of minutes geneva wheel, said tens of minutes geneva driver cam having a gear integrally formed therewith; h. a gear fixed to said minutes shaft in meshing engagement with the gear integrally formed with said tens of minutes geneva driver cam for driving said tens of minutes geneva driver cam and said tens of minutes geneva wheel; and i. a toothed gear integrally formed with said tens of minutes geneva gear in meshing engagement with a toothed gear integrally formed with said hours geneva driver cam for driving said hours geneva driver cam and said hours geneva wheel.

Claim 5

A digital clock comprising: a. a rotatable minutes drum having a shaft fixed thereto; b. a rotatable tens of minutes drum having a shaft fixed thereto, said tens of minutes drum and said tens of minutes shaft being mounted for rotation on said minutes shaft; c. an hours drum mounted for rotation on said tens of minutes shaft; d. a geneva wheel integrally formed with said hours drum for driving said hours drum; e. a geneva wheel fixed to said tens of minutes shaft for driving said tens of minutes drum; f. an hours geneva driver cam mounted for meshing engagement with said hours geneva wheel; g. a tens of minutes geneva driver cam mounted for meshing engagement with said tens of minutes geneva wheel, said tens of minutes geneva driver cam having a gear integrally formed therewith; h. a gear fixed to said minutes shaft in meshing engagement with the gear integrally formed with said tens of minutes geneva driver cam for driving said tens of minutes geneva driver cam and said tens of minutes geneva wheel; and i. a toothed gear integrally formed with said tens of minutes geneva gear in meshing engagement with a toothed gear integrally formed with said hours geneva driver cam for driving said hours geneva driver cam and said hours geneva wheel.

Claim 6

A digital clock as defined in claim 3 wherein said geneva driver cams are coaxially mounted with respect to each other.

Claim 7

A digital clock as defined in claim 4 wherein said geneva driver cams are located between two supporting plates, a shaft is fixed between said supporting plates, and both of said geneva driver cams are coaxially mounted on said shaft.

Claim 8

A digital clock as defined in claim 3 wherein a gear is arranged in meshing engagement with the gear on said minutes shaft for setting the minutes, hours, and tens of minutes drums.

Claim 9

A digital clock as defined in claim 3 wherein said tens of minutes and hours geneva wheels are approximately the same size as each other and are coaxially mounted with respect to each other.

Claim 10

A digital clock as defined in claim 3 wherein said geneva driver cams are approximately the same size as each other and said hours geneva driver cam has two drive fingers while the tens of minutes driver cam has one drive finger.

Claim 11

A digital clock as defined in claim 3 wherein the hours geneva driver cam is integrally formed with an elongated shaft which extends through the tens of minutes geneva driver cam, and an end portion of said elongated shaft includes an integrally formed conventional gear which is arranged in mesh with a conventional gear of an alarm cam mechanism.

Claim 12

A digital clock comprising: a. three support plates arranged generally parallel to and spaced from each other, the two outer support plates being provided with bearing members and the inner support plate being positioned between the two outer support plates; b. a rotatable minutes drum having an elongated shaft fixed thereto, said shaft having two end portions; c. one of the end portions of said minutes shaft being mounted for rotation in the bearing member of one of said outer support plates and the other end portion of said shaft being mounted in the other bearing member in the other outer support plate; d. a rotatable tens of minutes drum having an elongated shaft fixed thereto, said tens of minutes drum and said tens of minutes shaft being mounted for rotation on said minutes shaft; e. an hours drum mounted for rotation on said tens of minutes shaft, said tens of minutes shaft and said minutes shaft extending coaxially through a central bearing portion of said hours drum; f. a geneva wheel integrally formed with said hours drum for driving said hours drum; and g. a geneva wheel fixed to said tens of minutes shaft for driving said tens of minutes drum; h. an integrally formed gear and tens of minutes geneva driver cam positioned outwArdly from said minutes drum and said tens of minutes drum for driving said tens of minutes drum, said tens of minutes geneva driver cam mounted for meshing engagement with said tens of minutes geneva wheel; and i. a gear positioned outwardly from said minutes drum and said tens of minutes drum coaxial with and fixed to said minutes shaft in meshing engagement with the gear integrally formed with said tens of minutes geneva driver cam for driving said tens of minutes geneva driver cam and said tens of minutes geneva wheel.

Claim 13

A digital clock comprising: a. three support plates arranged generally parallel to and spaced from each other, the two outer support plates being provided with bearing members and the inner support plate being positioned between the two outer support plates; b. a rotatable minutes drum having an elongated shaft fixed thereto, said shaft having two end portions; c. one of the end portions of said minutes shaft being mounted for rotation in the bearing member of one of said outer support plates and the other end portion of said shaft being mounted in the other bearing member in the other outer support plate; d. a rotatable tens of minutes drum having an elongated shaft fixed thereto, said tens of minutes drum and said tens of minutes shaft being mounted for rotation on said minutes shaft; e. an hours drum mounted for rotation on said tens of minutes shaft, said tens of minutes shaft and said minutes shaft extending coaxially through a central bearing portion of said hours drum; f. a geneva wheel integrally formed with said hours drum for driving said hours drum; and g. a geneva wheel fixed to said tens of minutes shaft for driving said tens of minutes drum; h. an integrally formed gear and tens of minutes geneva driver cam positioned outwArdly from said minutes drum and said tens of minutes drum for driving said tens of minutes drum, said tens of minutes geneva driver cam mounted for meshing engagement with said tens of minutes geneva wheel; and i. a gear positioned outwardly from said minutes drum and said tens of minutes drum coaxial with and fixed to said minutes shaft in meshing engagement with the gear integrally formed with said tens of minutes geneva driver cam for driving said tens of minutes geneva driver cam and said tens of minutes geneva wheel.