Recorder pen

A replaceable recorder pen for a recording instrument comprising a tube having a chamber, means for maintaining a supply of fluid in said chamber, a writing nib carried by the tube in communication with said fluid, mounting means carried by said tube and having support walls spaced from said tube to provide an arm entering opening therebetween, and web means carried by the mounting means and extending into the opening between said tube and said support walls, said web means engaging with and gripping the opposite sides of an arm end whereby the web means adapts itself to variations in arm dimensions.

In a recorder pen for a recording instrument comprising a tube having a closed chamber, means for maintaining a supply of fluid in said chamber and a writing nib carried by the tube in communication with said fluid in combination with mounting means carried by said tube and having support walls spaced from said tube to provide an arm entering opening therebetween, said mounting means having web means bridging the opening between said tube and said support walls, whereby an arm end pierces a portion of said web means for securing said pen onto said arm.

A recorder pen for a recording instrument comprising a tube having a chamber closed at one end, a writing nib carried by the tube and having a passageway therethrough communicating with the inside of said chamber, a fibrous means impregnated with fluid nested in said chamber with one end in intimate contact with said nib, plug means in the open end of said tube for closing said chamber and for compacting said fibrous means, and mounting means carried by said tube for securing said pen on an arm, said mounting means comprising at least two spaced apart pairs of mounting members each pair of mounting members having a pair of support walls spaced from each other and from said tube to provide an arm entering opening between said support walls and said tube, at least one of said mounting members having web means bridging the openings between said tube and said support walls, and ridge means on said tube projecting into said openings between said support walls and said tube to restrict the height of said openings whereby an arm end pierces a portion of said web means and is urged by said ridge means into contact with said support walls to hold said pen onto said arm.

A recorder pen for a recording instrument comprising a tube having a chamber closed at one end, a writing nib carried by the tube and having a passageway therethrough communicating with the inside of said chamber, a fibrous means impregnated with fluid nested in said chamber with one end in intimate contact with said nib, plug means in the open end of said tube for closing said chamber, and mounting means carried by said tube for securing said pen on an arm, said mounting means comprising at least two spaced apart pairs of mounting members each pair of mounting members having a pair of support walls spaced from each other and from said tube to provide an arm entering opening between said support walls and said tube, at least one mounting member having web means extending into the opening between the tube and the support wall, and ridge means on said tube projecting into said opening between said support walls and said tube to restrict the height of said openings whereby an arm end will pierce a portion of said web means and is urged by said ridge means into contact with said support walls to hold said pen onto said arm.

A recorder pen for a recording instrument comprising a tube having a chamber closed on one end, a linear fiber writing nib carried by the tube in communication with the inside of said chamber, a writing fluid impregnated fibrous means is nested in said chamber, plug means embedded in the open end of said chamber for closing said chamber and for compacting said fibrous means against the end of said nib inside said chamber, ledge means in said chamber for limiting the inward movement of said plug means to restrict the amount of compacting of said fibrous means, mounting means carried by said tube for securing said pen on an arm, said mounting means comprising at least two longitudinally spaced apart pairs of mounting members having support walls spaced from said tube to provide arm entering openings therebetween, at least one of said mounting members having web means bridging the opening between said tube and the support wall of said mounting member, and ridge means on said tube and spaced from said support walls of one of said pairs of mounting members, said ridge means projecting into said opening between the tube and support walls to restrict the height of said openings, whereby an arm end pierces a portion of said web means and is urged by said ridge means into contact with said support walls on said mounting members to hold said pen onto said arm.

A recorder pen for a recording instrument comprising a tube having a chamber closed on one end, a linear fiber writing nib carried by the tube in communication with the inside of said chamber, a writing fluid impregnated fibrous means nested in said chamber, plug means embedded in the open end of said chamber for closing said chamber and for compacting said fibrous means against the end of said nib inside said chamber, ledge means in said chamber for limiting the inward movement of said plug means to restrict the amount of compacting of said fibrous means, mounting means carried by said tube for securing said pen on an arm, said mounting means comprising at least two longitudinally spaced apart pairs of mounting members having support walls spaced from said tube to provide arm entering openings therebetween, at least one of said mounting members having web means in the opening between said tube and the support wall of said mounting member, and ridge means on said tube and spaced from said support walls of one of said pairs of mounting members, said ridge means projecting into said opening between the tube and support walls to restrict the height of said openings, whereby an arm end deflects a portion of said web means and is urged by said ridge means into contact with said support walls on said mounting members to hold said pen onto said arm.