Abstract: A rotary transducer is described. The rotary transducer includes a Hall effect sensor, a rotary dial comprising at least two recessed pockets, a first magnet that is positioned within one of the at least two recessed pockets, and a second magnet that is positioned within another one of the at least two recessed pockets. In an acceleration only mode, the rotary dial is rotatable from a center position in a first direction and is not rotatable from the center position in a second direction. This mode is selected when a mode selection screw is inserted into a mode selection orifice. In a bi-directional acceleration/deceleration mode, the rotary dial is rotatable from the center position in the first direction and is rotatable from the center position in the second direction. This mode is selected when the mode selection screw is not inserted into the mode selection orifice.

Abstract: A leash control device includes: a housing including a top cover and a bottom cover rigidly connected to the top cover; a cable wheel including a cylindrical outer ring, the cylindrical outer ring being configured for a leash cable to be wounded on an outer surface of the cylindrical outer ring; a button having a cylindrical member configured on an upper portion of the button and a base configured on a lower portion of the button, the cylindrical member being configured to be extended through a central hole of the top cover; and a compression spring configured to bias the button in an upward direction to cause the button to engage with the cable wheel; wherein: when a pressing force is applied to the cylindrical member of the button to counter an upward biasing force of the compression spring and no pulling force is applied to the leash cable, the button is configured to be pressed down and disengaged from the cable wheel, and after the button is disengaged from the cable wheel, the cable wheel is configured

Abstract: A leash control device includes: a housing including a top cover and a bottom cover rigidly connected to the top cover; a cable wheel including a cylindrical outer ring, the cylindrical outer ring being configured for a leash cable to be wounded on an outer surface of the cylindrical outer ring; a button having a cylindrical member configured on an upper portion of the button and a base configured on a lower portion of the button, the cylindrical member being configured to be extended through a central hole of the top cover; and a compression string configured to bias the button in an upward direction to cause the button to engage with the cable wheel; wherein: when a pressing force is applied to the cylindrical member of the button to counter an upward biasing force of the compression string and no pulling force is applied to the leash cable, the button is configured to be pressed down and disengaged from the cable wheel, and after the button is disengaged from the cable wheel, the cable wheel is configured