Timer mechanism for use in a clock
AssigneeCopal Company Limited
InventorKiyoyuki Arai
Life of this patent
Estimating the term…
Abstract
The timer mechanism for use in a clock has a rotatable minute setting drum and a rotatable hour setting drum coaxial therewith each manually settable to a selected position to set a set time in terms of minute and hour, respectively. A first, a second and a third stationary contact member are arranged in the space between the minute and the hour setting drum for cooperating with switch contacts of first and second rotatable contact members so as to constitute together with the latter members a switch for the timer mechanism for actuating an electric device or an electrically operable warning device of the clock at a set time set by the minute and the hour setting drum.
Claims8
In a timer mechanism for use in a clock having a first rotatable member adapted to be rotated at a rate relating to advance of individual minutes of time and a second rotatable member adapted to be rotated at a rate relating to advance of individual hours of time and provided with an electric source and an electric device, said timer mechanism having a switch adapted to be closed at a set time preset in said timer mechanism to connect said electric source to said electric device so as to operate the latter at said preset time, said switch comprising:
- a minute setting drum having a pair of diametrically oppositely oriented through-holes therein and adapted to be manually rotated to a selected position and held thereat so as to set said set time in terms of minute;
- a first rotatable contact member driven by said first rotatable member and having a pair of switch contacts adapted to be passed through said through-holes in said minute setting drum when aligned therewith during the rotation of said first contact member;
- an hour setting drum arranged coaxially with said minute setting drum at the side thereof opposite to that at which said first contact member is located and having a pair of diametrically oppositely oriented through-holes therein and adapted to be manually rotated to a selected position and held thereat so as to set said set time in terms of hours;
- a second rotatable contact member located at the side of said hour setting drum opposite to the side at which said minute setting drum is located and driven by said second rotatable member and having a pair of switch contacts adapted to be passed through said through-holes in said hour setting drum when aligned therewith during the rotation of said second contact member;
- a first stationary contact member in the form of a semicircular contact segment positioned along the path of movement of said switch contacts of said first rotatable contact member;
- a second stationary contact member in the form of a semicircular contact segment positioned along the path of movement of said switch contacts of said second rotatable contact member;
- and
- a third stationary contact member having a pair of semicircular contact segments each positioned along the path of movement of said switch contacts of said first or said second rotatable contact member complementary with respect to said first or said second stationary contact member.
Dependencies are inferred from the claim text.