Timing device

Claim 2

A timing device, comprising driving means including a motor, a drive gear being driven by said driving means, a driven gear having a toothless portion, electromagnetic means for engaging or disengaging said drive gear to said driven gear in response to respective first and second states of operation thereof, and a pair of time-limit switching contacts being operated at the moment of a certain time lapse in response to preselected rotation of said driven gear, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse.

Claim 3

(Amended) A timing device, comprising driving means including a motor, a drive gear being driven by said driving means a driven gear having a toothless portion, electromagnetic means for engaging or disengaging said drive gear to said driven gear in response to actuation or nonactuation thereof, respectively, an actuator being operated in accordance with the rotation of said driven gear, and a pair of time-limit switching contacts capable of controlling an output device and being operated at the moment of a certain time lapse in response to preselected rotation of said driven gear, said drive gear being run idle in said toothless portioN of the driven gear immediately after the time lapse.

Claim 4

(Amended) A timing device, comprising driving means including a motor, a drive gear being driven by said driving means a driven gear having a toothless portion, electromagnetic means for engaging or disengaging said drive gear to said driven gear in response to actuation or nonactuation thereof, respectively, an actuator being operated in accordance with the rotation of said driven gear, and a pair of time-limit switching contacts capable of controlling an output device and being operated at the moment of a certain time lapse in response to preselected rotation of said driven gear, said drive gear being run idle in said toothless portioN of the driven gear immediately after the time lapse.

Claim 5

A timing device according to claim 1, wherein said toothless portion of the driven gear includes a recess into which the drive gear may be sunken.

Claim 6

A timing device according to claim 1, wherein said switching contacts include a plurality of a pair of time-limit switching contacts.

Claim 7

A timing device, comprising driving means including a motor, a drive gear being driven by said driving means, a driven gear having a toothless portion, electromagnetic means for engaging or disengaging said drive gear to said driven gear in response to the operating condition thereof, a pair of time-limit switching contacts being operated at the moment of a certain time lapse in response to preselected rotation of said driven gear, and a pair of instantly switching contacts capable of controlling an output device and being operated at the moment of engaging of said drive and driven gears, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse.

Claim 8

A timing device, comprising driving means including a motor, a drive gear being driven by said driving means, a driven gear having a toothless portion, electromagnetic means for engaging or disengaging said drive gear to said driven gear in response to the operating condition thereof, a pair of time-limit switching contacts being operated at the moment of a certain time lapse in response to preselected rotation of said driven gear, and a pair of instantly switching contacts capable of controlling an output device and being operated at the moment of engaging of said drive and driven gears, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse.

Claim 9

(Amended) A timing device, comprising driving means including a motor, a drive shaft being driven by said driving means, a drive gear provided on the shiftable end of said shaft, a driven gear having a toothless portion, electromagnetic means for shifting said shaft to engage or disengage said drive gear with said driven gear in response to the operating condition thereof, a first spring for shifting said shaft to engage said drive gear with said driven gear by means of its resilient force, and a pair of time-limiting switching contacts being operated at the moment of a certain time lapse in accordance with the rotation of said driven gear, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse.

Claim 10

(Amended) A timing device, comprising driving means including a motor, a drive shaft being driven by said driving means, a drive gear provided on the shiftable end of said shaft, a driven gear having a toothless portion, electromagnetic means for shifting said shaft to engage or disengage said drive gear with said driven gear in response to the operating condition thereof, a first spring for shifting said shaft to engage said drive gear with said driven gear by means of its resilient force, and a pair of time-limiting switching contacts being operated at the moment of a certain time lapse in accordance with the rotation of said driven gear, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse.

Claim 11

A timing device according to claim 6, wherein said electromagnetic means is provided with a movable member operatively associated with the shiftable end of said shaft, and a second spring for shifting said movable member and shaft to disengage said drive gear from said driven gear against the resilient force of said first spring.

Claim 12

A timing device, comprising driving means including a motor, a drive gear being driven by said driving means, a driven gear having a toothless portion, electromagnetic means for engaging or disengaging said drive gear to said driven gear in response to the operating condition thereof, a cam plate being driven with the rotation of said driven gear, an actuator for switching being operated with the rotation of said cam plate, and a pair of time-limit switching contacts capable of operating an output device and being operated at the moment of a certain time lapse in accordance with the rotation of said driven gear, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse.

Claim 13

A timing device, comprising driving means including a motor, a drive gear being driven by said driving means, a driven gear having a toothless portion, electromagnetic means for engaging or disengaging said drive gear to said driven gear in response to the operating condition thereof, a cam plate being driven with the rotation of said driven gear, an actuator for switching being operated with the rotation of said cam plate, and a pair of time-limit switching contacts capable of operating an output device and being operated at the moment of a certain time lapse in accordance with the rotation of said driven gear, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse.

Claim 14

A timing device according to claim 8, wherein said driving means is positioned at one side of said electromagnetic means and said cam plate is positioned at other side of said electromagnetic means, while said time-limit switching contacts are above said electromagnetic means.

Claim 15

A timing device, comprising driving means including a motor, a drive gear being driven by said driving means, a driven gear having a toothless portion, electromagnetic means having a moving-iron member for engaging or disengaging said drive gear to said driven gear, a cam plate being driven with the rotation of said driven gear, an actuator for switching being operated with the rotation of said cam plate, a pair of time-limit switching contacts capable of operating an output device and being operated at the moment of a certain time lapse in accordance with the rotation of said driven gear, and a pair of instantly switching contacts being operated at the moment of engaging of said drive And driven gears for sustaining the operation of said electromagnetic means, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse.

Claim 16

A timing device, comprising driving means including a motor, a drive gear being driven by said driving means, a driven gear having a toothless portion, electromagnetic means having a moving-iron member for engaging or disengaging said drive gear to said driven gear, a cam plate being driven with the rotation of said driven gear, an actuator for switching being operated with the rotation of said cam plate, a pair of time-limit switching contacts capable of operating an output device and being operated at the moment of a certain time lapse in accordance with the rotation of said driven gear, and a pair of instantly switching contacts being operated at the moment of engaging of said drive And driven gears for sustaining the operation of said electromagnetic means, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse.

Claim 17

A timing device according to claim 10, wherein said actuator is mounted on a movable supporter interlocking with said moving-iron member.

Claim 18

A timing device according to claim 10, wherein the moving contact of said instantly switching contacts is operatively associated with a fixed supporter mounted on said moving-iron member.

Claim 19

A timing device according to claim 12, wherein the moving contact of said instantly switching contacts is provided on one end of the fixed supporter mounted on said moving-iron member, and said movable supporter fixed with the actuator to be engaged with the cam plate by the resilient force of a third spring is provided on other end of the fixed supporter, while the drive shaft of said drive gear passes through a recess provided at the intermediate portion of the fixed supporter.

Claim 20

A timing device according to claim 12, wherein said driving means is positioned at one side of said electromagnetic means and said cam plate is positioned at other side of said electromagnetic means while said time-limit switching and instantly switching contacts are positioned above said electromagnetic means.

Claim 21

A timing device, comprising a driving means including a motor, a drive shaft being driven by said driving means, a drive gear provided on the shiftable end of said drive shaft, a driven gear having a toothless portion, a first spring for shifting said drive shaft to engage said drive gear with said driven gear, electromagnetic means having a moving-iron plate operatively associated with the shiftable end of said shaft for shifting said drive shaft to disengage said drive gear from said driven gear and a second spring for shifting said moving-iron member and shaft to disengage said drive gear from said driven gear against the resilient force of said first spring, a cam plate being driven with rotation of said driven gear, an actuator being operated with the rotation of said cam plate, a pair of instantly switching contacts being operated by a fixed supporter mounted on said moving-iron member at the moment of engagement of the drive and driven gears, and a pair of time-limit switching contacts being operated at the moment of a certain time lapse in accordance with the rotation of said driven gear, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse, the moving contact of said instantly switching contacts being provided on one end of the fixed supporter mounted on said moving-iron member and said movable supporter fixed with the actuator to be engaged with the cam plate by the resilient force of a third spring being provided on the other end of the fixed supporter while the drive shaft of said drive gear being passed through a recess provided at the intermediate portion of the fixed supporter.

Claim 22

A timing device, comprising a driving means including a motor, a drive shaft being driven by said driving means, a drive gear provided on the shiftable end of said drive shaft, a driven gear having a toothless portion, a first spring for shifting said drive shaft to engage said drive gear with said driven gear, electromagnetic means having a moving-iron plate operatively associated with the shiftable end of said shaft for shifting said drive shaft to disengage said drive gear from said driven gear and a second spring for shifting said moving-iron member and shaft to disengage said drive gear from said driven gear against the resilient force of said first spring, a cam plate being driven with rotation of said driven gear, an actuator being operated with the rotation of said cam plate, a pair of instantly switching contacts being operated by a fixed supporter mounted on said moving-iron member at the moment of engagement of the drive and driven gears, and a pair of time-limit switching contacts being operated at the moment of a certain time lapse in accordance with the rotation of said driven gear, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse, the moving contact of said instantly switching contacts being provided on one end of the fixed supporter mounted on said moving-iron member and said movable supporter fixed with the actuator to be engaged with the cam plate by the resilient force of a third spring being provided on the other end of the fixed supporter while the drive shaft of said drive gear being passed through a recess provided at the intermediate portion of the fixed supporter.

Claim 23

A timing device according to claim 15, wherein said driving means includes reduction gears positioned at one side of said electromagnetic means and said second spring is positioned at the side of said reduction gears.

Claim 24

A timing device, comprising driving means having reduction gears driven by a motor, a drive shaft being driven by said driving means, a drive gear provided on the shiftable end of said drive shaft, a driven gear having a toothless portion, a driven shaft having said driven gear, a cam plate, a spiral spring and a pointer needle, a calibrated scale associated with said pointer needle, a first spring for shifting said drive shaft to engage said drive gear with said driven gear, electromagnetic means having a moving-iron plate operatively associated with the shiftable end of said drive shaft for shifting said drive shaft to disengage said drive gear from said driven gear and a second sprinG for shifting said moving-iron member and shaft to disengage said drive gear from said driven gear against the resilient force of said first spring, a cam plate being driven with rotation of said driven gear, an actuator being operated with the rotation of said cam plate, a pair of instantly switching contacts being operated by a fixed supporter mounted on said moving-iron member at the moment of engagement of the drive and driven gears, and a pair of time-limit switching contacts being operated at the moment of a certain time lapse in accordance with the rotation of said driven gear, said reduction gears being positioned at one side of said electromagnetic means together with said second spring, said cam plate and driven gear being positioned at the other side of said electromagnetic means, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse.

Claim 25

A timing device, comprising driving means having reduction gears driven by a motor, a drive shaft being driven by said driving means, a drive gear provided on the shiftable end of said drive shaft, a driven gear having a toothless portion, a driven shaft having said driven gear, a cam plate, a spiral spring and a pointer needle, a calibrated scale associated with said pointer needle, a first spring for shifting said drive shaft to engage said drive gear with said driven gear, electromagnetic means having a moving-iron plate operatively associated with the shiftable end of said drive shaft for shifting said drive shaft to disengage said drive gear from said driven gear and a second sprinG for shifting said moving-iron member and shaft to disengage said drive gear from said driven gear against the resilient force of said first spring, a cam plate being driven with rotation of said driven gear, an actuator being operated with the rotation of said cam plate, a pair of instantly switching contacts being operated by a fixed supporter mounted on said moving-iron member at the moment of engagement of the drive and driven gears, and a pair of time-limit switching contacts being operated at the moment of a certain time lapse in accordance with the rotation of said driven gear, said reduction gears being positioned at one side of said electromagnetic means together with said second spring, said cam plate and driven gear being positioned at the other side of said electromagnetic means, said drive gear being run idle in said toothless portion of the driven gear immediately after the time lapse.

Claim 26

A timing device according to claim 17, wherein said pointer needle is rotated with a time-set dial knob having a setting projection in contact with said pointer.

Claim 27

A timing device according to claim 18, wherein said calibrated scale is removable by removing said dial knob.