Example clippable multi-tone whistles, as well as systems and methods for manufacturing the same are described. An example clippable multi-tone whistle may comprise: a clip attached to a whistle body. The whistle body comprises a flat surface under the clip; a first opening configured to allow air flow to come into the whistle body; and on the flat surface a second opening configured to allow air flow to come out of the whistle body. The second opening is at least partially blocked by the clip, which controls direction of one or more air flows coming out of the second opening. The whistle part is configured to generate a plurality of different sound tones in accordance with user finger movements around the clip and the second opening. The whistle may further comprise a glass breaker, a length scale, and a bolt action switch, which may function as a fire starter.

Aspects of the present invention relate to external user interfaces used in connection with head worn computers (HWC).

Aspects of the present invention relate to external user interfaces used in connection with head worn computers (HWC).

A multifunctional writing instrument includes a hollow body, wherein the hollow body comprises one or more cavities configured to attach with a plurality of technical drawing tools. A first writing member having a first writing tip is included. The first writing member includes lead and a mechanical pencil system being provided in a first portion of the hollow body, and wherein the first writing tip is axial with respect to the hollow body. A second writing member having a second writing tip is included. The second writing member comprises ink and an ink pen system being provided in a second portion of the hollow body. The first portion of the hollow body is at an opposite end of the second portion of the hollow body. The second writing tip is axial with respect to the hollow body.

A beat recording pen for the recording and editing music and while serving as writing instrument. The device includes a retractable writing instrument disposed in an elongated shaft designed to house a power supply designed to provide electrical power to a transceiver that can transmit and receive digital signals to and from a connected mobile device or computer. The beat recording pen further includes an impact sensor that can detect an audio input signal of an impact event and convert the audio input signal into a digital signal. A micro-controller is disposed within the pen and can record the converted audio input signals detected by the impact sensor and interface with a software application installed on a connected mobile device or computer.

A pencil sharpener may include a body having a first end and a second end aligned along a main axis of the body, the body having a pencil receptacle disposed at the first end and configured to releasably attach to a pencil such that a longitudinal axis of the pencil is parallel to the main axis of the body of the pencil sharpener, the body further having a bore formed therein between the first end and the second end, the bore having a bore axis oblique to the main axis; and a sharpener blade disposed adjacent the bore such that a portion of a pencil is insertable into the bore of the body to be sharpened by the sharpener blade.

Provided is a system and method for replicating drawings or carvings. The system includes three drawing or carving instruments. The three drawing or carving instruments are attached to one another via a fastener between each pair of drawing or carving instruments. A first tip of a first drawing or carving instrument is oriented between 0 and 180 degrees with respect to a second tip of a second drawing or carving instrument. A third tip of a third drawing or carving instrument is oriented between 0 and 180 degrees with respect to the first tip of the first drawing or carving instrument and with respect to the second tip of the second drawing or carving instrument. A first plane defined by the first tip and the second tip is non-coplanar with a second plane defined by the first tip and the third tip.

A writing instrument, comprising a tubular body having a longitudinal axis with a first and a second end, and with an opening arranged in the first end; a first building block having a body part with a substantially plane surface and one or more coupling knobs extending from the substantially plane surface, and where the first building block is fixed onto the outside of the tubular body so that the coupling knobs extend away from said longitudinal axis.

Various embodiments of substantially linear multitools are disclosed. One embodiment provides multitool having a first handle segment having a first handle portion and a second handle portion, the first handle segment having an internal channel housing a first pivot tool arm, a second handle segment having a third handle portion and a fourth handle portion, the second handle segment having an internal channel housing a second pivot tool arm, a pivot to rotatably couple the first pivot tool arm to the second pivot tool arm to create a pivot tool, wherein the pivot can rotate the first pivot tool arm and second pivot tool arm into a substantially straight arrangement allowing the first handle segment to be collinear with the second handle segment when the multitool is in a closed orientation.

A stylus includes in a tubular casing a core body, a pressure detector that detects a pressure applied to the core body, a coupling fitted over the core body, the coupling transmitting the pressure to the pressure detector, and a core pressing controller that controls the coupling to press the core body axially in the tubular casing. The coupling includes a push bearer that bears a push from the core pressing controller, a presser having an axial end fitted in the pressure detector, a fitting region fitted over a portion of the core body remote from a pen tip end of the tubular casing, a receptacle in which another end of the presser remote from an axial end thereof is axially movably housed, and an elastic member disposed in the receptacle, the elastic member biasing the other end of the presser resiliently toward an axial pen tip end of the receptacle.