An adjustable timer teaches time in a simple manner to those having difficulty understanding the concept of time. The timer displays remaining and elapsed time. The timer may be set to rotate a shaft at different speeds. A colored disk is attached to the shaft. Boards having faces with different numerical indicia reside in a cavity and may be interchanged by a user. The exposed board face corresponds to the setting of the timer such that one full rotation of the shaft and disk corresponds to the numerical indicia of the exposed board face.

A horological mechanism with a first mechanism (100) and a first output wheel set (101), a second mechanism and a second output wheel set (102), for displaying a first or a second indication specific to the first mechanism (100) or second mechanism (200), by a switching and coupling mechanism (500), including, on a coupling arbor (937, 938), two input wheel sets (1; 2) connected to the output wheel sets (101; 102), a sliding wheel set moving under constant strain between these input wheel sets (1; 2), and cooperating alternately and exclusively, by clicking in a single angular position per revolution, with either one, selected under the action of a command from a user on a controller, to establish a driving connection between the input wheel set engaged with the sliding wheel set at the given moment in time, and a display means.

An adjustable timer teaches time in a simple manner to those having difficulty understanding the concept of time. The timer displays remaining and elapsed time. The timer may be set to rotate a shaft at different speeds. A colored disk is attached to the shaft. Boards having faces with different numerical indicia reside in a cavity and may be interchanged by a user. The exposed board face corresponds to the setting of the timer such that one full rotation of the shaft and disk corresponds to the numerical indicia of the exposed board face.

An adjustable timer teaches time in a simple manner to those having difficulty understanding the concept of time. The timer displays remaining and elapsed time. The timer may be set to rotate a shaft at different speeds. A colored disk is attached to the shaft. Boards having faces with different numerical indicia reside in a cavity and may be interchanged by a user. The exposed board face corresponds to the setting of the timer such that one full rotation of the shaft and disk corresponds to the numerical indicia of the exposed board face.

An adjustable timer teaches time in a simple manner to those having difficulty understanding the concept of time. The timer displays remaining and elapsed time. The timer may be set to rotate a shaft at different speeds. A colored disk is attached to the shaft. Boards having faces with different numerical indicia reside in a cavity and may be interchanged by a user. The exposed board face corresponds to the setting of the timer such that one full rotation of the shaft and disk corresponds to the numerical indicia of the exposed board face.

A switch conversion apparatus including an interface device, a mounting plate configured to mount to a toggle switch and including at least one aperture for receiving a toggle arm of a toggle switch, and an actuator plate configured to slidably engage the mounting plate and including at least one aperture for receiving and engaging a toggle arm of a toggle switch when engaged by the interface device so as to transition the state of the switch. Other embodiments of a switch conversion apparatus include one or more mechanical, electrical, and/or pneumatic timers.

A switch conversion apparatus including an interface device, a mounting plate configured to mount to a toggle switch and including at least one aperture for receiving a toggle arm of a toggle switch, and an actuator plate configured to slidably engage the mounting plate and including at least one aperture for receiving and engaging a toggle arm of a toggle switch when engaged by the interface device so as to transition the state of the switch. Other embodiments of a switch conversion apparatus include one or more mechanical, electrical, and/or pneumatic timers.