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US 6,483,052 B2Granted
Electromechanical appliance programmer/timer
AssigneeRanco Incorporated of Delaware
InventorsRonald S. Joyce, Paul H. Tuma, James E. Pearson
Life of this patent
Estimating the term…
Abstract
A programmer/timer having a cam disk that includes concentric cam tracks having multiple working heights formed on one face thereof. The programmer/timer further includes a plate assembly that includes multiple cam followers for engaging cam disk and a plurality of single pole double throw switches configured for multiple working heights disposed for actuation by cam followers.
Claims21
An electromechanical programmer/timer comprising:
- a cam rotatably mounted about a control shaft and including a plurality of cam tracks thereon, said cam tracks having at least two working heights;
- a drive disposed in operable engagement with said cam, to selectively advance said cam;
- a plate assembly including a plurality of cam followers, a portion of said plate assembly being registered with a hub portion of said cam;
- a plurality of switches, each of said switches being configured for a cam having multiple working heights, wherein said switches are disposed for actuation by said cam followers;
- and
- wherein said cam is retractably mounted such that it may be retracted axially from said plate assembly, permitting rotation of said cam without causing actuation of said switches.
3 more elements
An electromechanical programmer/timer comprising:
- a housing including a motor mounted thereon, said motor being enclosed by said housing, said housing further including an opening for motor coil terminal assembly to penetrate;
- a cam rotatably mounted about a control shaft and including a cam disk that includes a plurality of cam tracks thereon, said cam tracks having multiple heights;
- drive means including a motor pinion operably connected to said motor and operably engagable with a perimeter gear on said cam disk;
- a plate assembly including a plurality of cam followers and a main bearing molded thereon;
- a plurality of switches, each of said switches each including at least one cam follower and being configured for a cam having multiple working heights, each of said cam followers being disposed for actuation by contacting one of said plurality of cam tracks;
- wherein said cam is retractably mounted such that it may be retracted axially from said plate assembly, permitting rotation of said cam without causing actuation of said switches;
- and
- wherein said switches are configured to be open when said cam is retracted from said plate assembly.
5 more elements
A method for fabricating an electromechanical program timer, said method comprising:
- providing a housing including a motor mounted thereon;
- providing a cam rotatably mounted about a control shaft and including a plurality of cam tracks thereon, said cam tracks having at least two working heights;
- providing a drive operably connected to said motor and effectual for advancing said cam;
- providing a plate assembly including a plurality of cam followers, a portion of said plate assembly being registerable with a hub portion of said cam;
- providing a plurality of switches which are configured for a cam having multiple working heights, said switches being disposable for actuation by said cam followers
- wherein said cam is retractably mounted such that it may be retracted from plate assembly, permitting of said cam without causing actuation of said switches;
- and
- assembling said housing, said cam, said drive, said plate assembly and said plurality of switches with one another.
5 more elements
Dependencies are inferred from the claim text.