Motor timer

A motor timer comprising:

• a timing mechanism block including a pair of support plates disposed in parallel to each other, reduction gear means supported between said support plates, a timing gear disposed between said support plates for performing a timing operation, clutch means supported between said support plates for selectively connecting and disconnecting said reduction gear means to and from said timing gear, a drive motor mounted on one of said support plates and coupled with said reduction gear means, and a clutch operation shaft for actuating said clutch means;
• an electromagnetic means block disposed on the underside of said timing mechanism block;
• and
• a contact mechanism block disposed on one side of said electromagnetic means block and including a leaf-spring contact assembly having first and second contact groups, first and second operation members disposed on the top of said leaf-spring contact assembly for effecting the opening and closing operation for said first and second contact groups respectively, means for normally applying a turning bias in one direction to each of said first and second operation members to thereby cause said first and second operation members to effect the opening and closing operation for said first and second contact groups, respectively, when turning is allowed, and trip lever means adapted to be actuated in response to the timing operation of said timing gear, said first operation member having first engaging means releasably engaged with an armature means of said electromagnetic means block for limiting the rotation of said first operation member by said turning bias applies thereto and second engaging means adapted to be operatively engaged with said operation shaft of said clutch means so that the rotation of said first operation member is allowed when said first engaging means is released in response to the energization of said electromagnetic block means and at the same time said second engaging means allows said operation shaft of said clutch means to be actuated to thereby bring said clutch means into its actuated state, said second operation member having third and fourth engaging means releasably engaged with said armature means and said trip lever means respectively so that said trip lever means causes said fourth engaging means to be released from the engagement with said trip lever means in response to the timing operation of said timing gear after the lapse of a predetermined period of time following the releasing of said third engaging menas from the engagement with said armature means upon the energization of said electromagnetic means block, thereby allowing the rotation of said second operation member by said turning bias applied thereto.

A motor timer comprising:

• a timing mechanism section including a drive motor, a reduction gear device coupled with said drive motor, a timing gear for performing a timing operation, and a clutch device for selectively connecting and disconnecting said reduction gear device to and from said timing gear, said clutch device comprising a pair of upper and lower gears having respectively engaging tooth sections on their opposite surfaces, said clutch device further having an operation shaft secured to one of said upper and lower gears;
• an electromagnetic device disposed on the underside of said timing mechanism section;
• and
• a contact mechanism disposed on one side of said electromagnetic device and including a leaf-spring contact assembly having an instantaneously operated contact group and a timing operated contact group, and an instantaneous operation member and a timing operation member both supported rotatably on the top of said leaf-spring contact assembly for effecting the opening and closing operation for said instantaneously operated contact group and said timing operated contact group respectively, said instantaneous operation member being susbstantially inversely L-shaped and having a horizontal portion the upper surface of which is in contact with the lower end portion of said operation shaft, said operation shaft being set in vertical motion in response to the actuation of said instantaneous operation member thereby to perform the connection between said upper and lower gears of said clutch device.