A manual device extends in an axial direction and includes a housing having a first housing portion and a second housing portion. First and second heads are each axially movable between a use position and a stowed position. The first head is in the stowed position when the second head is in the use position, whereas the second head is in the stowed position when the first head is in the use position. The first head and the second head both are carried by a single carriage movable in the axial direction and arranged inside a barrel. A groove forming a cam track is formed by a first shoulder of the first housing portion and by a second shoulder of the barrel. A lug of the carriage cooperates with the groove.

A page turning device is mountable on an end of a writing implement or similarly other shape element for enabling a user to more easily turn paper sheets. The page turning device is formed of a deformable elastic material. The elastic material is formed so as to basically provide a sheath-like female receptacle for receiving an implement end and further includes an outer sheet-engaging surface. The outer sheet-engaging surface provides gripping action at a paper sheet surface for enabling the user to turn paper sheets. The female receptacle is characterized by including an end-receiving mouth, a receptacle bottom, and a series of inwardly and radially extending rib formations. Each rib formation has an innermost edge, each of which are elastically deformable when receiving the implement end. Each rib formation directs restorative forces toward the implement end for holding the page turning device upon the implement end.

A housing element for a writing instrument includes a hollow, sleeve-shaped, elongated base body having an opening for receiving the writing instrument or a pencil lead of the writing instrument at a first longitudinal end. The base body has a second longitudinal end, which is opposite the first longitudinal end, and has a retaining recess that is formed with a polygonal cross section for directly or indirectly retaining a bit in a rotationally fixed manner. A writing instrument including the housing element is also provided.

A housing element for a writing instrument includes a hollow, sleeve-shaped, elongated base body having an opening for receiving the writing instrument or a pencil lead of the writing instrument at a first longitudinal end. The base body has a second longitudinal end, which is opposite the first longitudinal end, and has a retaining recess that is formed with a polygonal cross section for directly or indirectly retaining a bit in a rotationally fixed manner. A writing instrument including the housing element is also provided.

An adaptor allows a user to turn any pencil or pen into a capacitive stylus while still allowing it to write on paper. When attached to a pencil, pen or similarly shaped and purposed tool, it gives the tool the added capability of operating electronic devices having a capacitive touch screen. It does this while constantly maintaining the writing instrument's intrinsic capability of marking paper. The main component of the invention comprises a fastener which allows electricity to pass along it while simultaneously allowing the writing utensil tip to be permanently exposed. It can transfer electricity from the user's hand to the touch screen without interfering with the original function or ergonomic shape of the writing instrument. A seamless workflow between surfaces is created since the same end of the writing instrument is used and no other action is required to reveal or conceal its tip.

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.

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.

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.

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.

A pen structure with a glass smasher has the glass smasher mounted at the front end of a pen. When a user holds the pen and presses the front end (i.e., the smashing cone) of the smashing rod of the glass smasher forcibly against a glass obstacle, an impact block will strike the rear section of the smashing rod vigorously such that the smashing cone is instantly driven to smash the glass obstacle. A ballpoint/rollerball refill is detachably provided in the pen and is at least 6 cm long in order to contain enough ink. The overall length of the pen is at least 10 cm so that the pen can be easily held while the user writes or draws with the ballpoint/rollerball tip and while the user applies a force to a glass obstacle through the front end of the smashing rod to smash the glass obstacle.