Snap on ferrule

Claim 2

In a speedometer coupling arrangement for coupling the rotating core of a speedometer cable to a magnet shaft rotatably carried in a cylindrical speedometer casing boss with said boss having a peripheral groove intermediate the leading end of said boss and the speedometer end of said boss, the improvement comprising: a unitary plastic ferrule adapted to be fixed to said cable at one end and having an open end first tubular portion opposite said one end for receiving said boss leading end with the internal diameter of said tubular portion corresponding to the external diameter of said boss for coaxial engagement with said boss, an axially extending passageway in the annular wall of said tubular portion spaced intermediate the open end of said tubular portion and the opposite end of said tubular portion, a latch body integrally formed on said tubular portion intermediate the axially extending sides of said passageway and having a single juncture with said tubular portion at an axial position terminating said passageway adjacent said open end for flexure radially about the juncture of said latch body and said tubular portion, a hook on said latch body projecting radially inwardly from said latch body into said passageway for radial movement into said groove in response to axial alignment of said hook with said groove to prevent axial movement of said ferrule relative said boss with said tubular portion having peripheral surface contact with said boss on opposite axial sides of said latch hook to avoid distortion of said ferrule wall and to insure coupling of the ferrule to said boss, a second, reduced diameter tubular portion integrally joined to said first tubular portion between said first tubular portion and said ferrule one end and forming an internal shoulder therebetween, and an annular recess within said shoulder to receive the leading end of the boss coaxially positioned within said first tubular portion.

Claim 3

In a speedometer coupling arrangement for coupling the rotating core of a speedometer cable to a magnet shaft rotatably carried in a cylindrical speedometer casing boss with said boss having a peripheral groove intermediate the leading end of said boss and the speedometer end of said boss, the improvement comprising: a unitary plastic ferrule adapted to be fixed to said cable at one end and having an open end first tubular portion opposite said one end for receiving said boss leading end with the internal diameter of said tubular portion corresponding to the external diameter of said boss for coaxial engagement with said boss, an axially extending passageway in the annular wall of said tubular portion spaced intermediate the open end of said tubular portion and the opposite end of said tubular portion, a latch body integrally formed on said tubular portion intermediate the axially extending sides of said passageway and having a single juncture with said tubular portion at an axial position terminating said passageway adjacent said open end for flexure radially about the juncture of said latch body and said tubular portion, a hook on sAid latch body projecting radially inwardly from said latch body into said passageway for radial movement into said groove in response to axial alignment of said hook with said groove to prevent axial movement of said ferrule relative said boss with said tubular portion having peripheral surface contact with said boss on opposite axial sides of said latch hook to avoid distortion of said ferrule wall and to insure coupling of the ferrule to said boss, a second reduced diameter tubular portion integrally joined to said first tubular portion coaxial therewith and intermediate said first tubular portion and said ferrule one end, a radial wall integrally formed between said first and second tubular portions, and a cylindrical bearing concentrically positioned intermediate said boss and said magnet shaft for rotatably carrying said magnet shaft and fixed in position relative to said boss, said cylindrical bearing extending axially beyond the leading end of said boss and peripherally engaged by said second tubular portion, said boss being axially dimensioned to form an end radial wall at said leading end positioned for engaging said ferrule radial wall.

Claim 4

In a speedometer coupling arrangement for coupling the rotating core of a speedometer cable to a magnet shaft rotatably carried in a cylindrical speedometer casing boss with said boss having a peripheral groove intermediate the leading end of said boss and the speedometer end of said boss, the improvement comprising: a unitary plastic ferrule adapted to be fixed to said cable at one end and having an open end first tubular portion opposite said one end for receiving said boss leading end with the internal diameter of said tubular portion corresponding to the external diameter of said boss for coaxial engagement with said boss, an axially extending passageway in the annular wall of said tubular portion spaced intermediate the open end of said tubular portion and the opposite end of said tubular portion, a latch body integrally formed on said tubular portion intermediate the axially extending sides of said passageway and having a single juncture with said tubular portion at an axial position terminating said passageway adjacent said open end for flexure radially about the juncture of said latch body and said tubular portion, a hook on sAid latch body projecting radially inwardly from said latch body into said passageway for radial movement into said groove in response to axial alignment of said hook with said groove to prevent axial movement of said ferrule relative said boss with said tubular portion having peripheral surface contact with said boss on opposite axial sides of said latch hook to avoid distortion of said ferrule wall and to insure coupling of the ferrule to said boss, a second reduced diameter tubular portion integrally joined to said first tubular portion coaxial therewith and intermediate said first tubular portion and said ferrule one end, a radial wall integrally formed between said first and second tubular portions, and a cylindrical bearing concentrically positioned intermediate said boss and said magnet shaft for rotatably carrying said magnet shaft and fixed in position relative to said boss, said cylindrical bearing extending axially beyond the leading end of said boss and peripherally engaged by said second tubular portion, said boss being axially dimensioned to form an end radial wall at said leading end positioned for engaging said ferrule radial wall.

Claim 5

The speedometer coupling arrangement as claimed in claim 2 wherein; said ferrule includes an internal annular wall located axially beyond the end of said cylindrical bearing when said ferrule is coupled to said boss, said cable core extends through said annular wall with the outer casing of said speedometer cable having one end abutting one side of said wall, said core carries an enlarged diameter washer fixed thereto on the opposite side of said wall with said wall acting as a thrust bearing for said speedometer cable core washer.

Claim 6

In a speedometer coupling arrangement for coupling the rotating core of a speedometer cable to a magnet shaft rotatably carried in a cylindrical speedometer casing boss with said boss having a peripheral groove intermediate the leading end of said boss and the speedometer end of said boss, the improvement comprising: a unitary plastic ferrule adapted to be fixed to said cable at one end and having an open end first tubular portion opposite said one end for receiving said boss leading end with the internal diameter of said tubular portion corresponding to the external diameter of said boss for coaxial engagement with said boss, an axially extending passageway in the annular wall of said tubular portion spaced intermediate the open end of said tubular portion and the opposite end of said tubular portion, a latch body integrally formed on said tubular portion intermediate the axially extending sides of said passageway and having a single juncture with said tubular portion at an axial position terminating said passageway adjacent said open end for flexure radially about the juncture of said latch body and said tubular portion, a hook on said latch body projecting radially inwardly from said latch body into said passageway for radial movement into said groove in response to axial alignment of said hook with said groove to prevent axial movement of said ferrule relative said boss with said tubular portion having peripheral surface contact with said boss on opposite axial sides of said latch hook to avoid distortion of said ferrule wall and to insure coupling of the ferrule to said boss, said latch body includes an integral latch operator which extends from said body toward said ferrule one end beyond said inwardly projecting hook, an annular ring carried solely by said latch operator at the extending end of said operator in spaced concentric fashion with said open ended tubular portion whereby grasping of said ring and radially inward pressure on said ring at a position spaced generally diametrically opposite said hook and latch body facilitates radial flexure of said latch body in a direction to remove said hook from said speedometer casing boss groove, and a longitudinally extending enlarged surface portion on said ring diametrically opposite said projecting hook to facilitate tactile detErmination of said diametrically opposite position and the application of said pressure for facilitating coupling and decoupling of said ferrule to and from said cylindrical speedometer casing boss.

Claim 7

In a speedometer coupling arrangement for coupling the rotating core of a speedometer cable to a magnet shaft rotatably carried in a cylindrical speedometer casing boss with said boss having a peripheral groove intermediate the leading end of said boss and the speedometer end of said boss, the improvement comprising: a unitary plastic ferrule adapted to be fixed to said cable at one end and having an open end first tubular portion opposite said one end for receiving said boss leading end with the internal diameter of said tubular portion corresponding to the external diameter of said boss for coaxial engagement with said boss, an axially extending passageway in the annular wall of said tubular portion spaced intermediate the open end of said tubular portion and the opposite end of said tubular portion, a latch body integrally formed on said tubular portion intermediate the axially extending sides of said passageway and having a single juncture with said tubular portion at an axial position terminating said passageway adjacent said open end for flexure radially about the juncture of said latch body and said tubular portion, a hook on said latch body projecting radially inwardly from said latch body into said passageway for radial movement into said groove in response to axial alignment of said hook with said groove to prevent axial movement of said ferrule relative said boss with said tubular portion having peripheral surface contact with said boss on opposite axial sides of said latch hook to avoid distortion of said ferrule wall and to insure coupling of the ferrule to said boss, said latch body includes an integral latch operator which extends from said body toward said ferrule one end beyond said inwardly projecting hook, an annular ring carried solely by said latch operator at the extending end of said operator in spaced concentric fashion with said open ended tubular portion whereby grasping of said ring and radially inward pressure on said ring at a position spaced generally diametrically opposite said hook and latch body facilitates radial flexure of said latch body in a direction to remove said hook from said speedometer casing boss groove, and a longitudinally extending enlarged surface portion on said ring diametrically opposite said projecting hook to facilitate tactile detErmination of said diametrically opposite position and the application of said pressure for facilitating coupling and decoupling of said ferrule to and from said cylindrical speedometer casing boss.

Claim 8

In a speedometer coupling arrangement for coupling the rotating core of a speedometer cable to a magnet shaft rotatably carried in a cylindrical speedometer casing boss projecting from a speedometer frame, with said boss having a peripheral groove intermediate the leading end of said boss and the speedometer end of said boss together with a recessed periphery between said groove and the leading end of said boss to form a peripheral shoulder intermediate said leading end and said groove, the improvement comprising: a unitary plastic ferrule adapted to be fixed to said cable at one end and having an open end first tubular portion opposite said one end for receiving said leading end with the internal diameter of said tubular portion corresponding to said boss for coaxial engagement with said boss, an axially extending passageway in the annular wall of said tubular portion spaced intermediate the open end of said tubular portion and the opposite end of said tubular portion, a latch body integrally formed on said tubular portion intermediate the axially extending sides of said passageway and having a single juncture with said tubular portion at an axial position terminating said passageway adjacent said open end for flexure radially about the juncture of said latch body and said tubular portion, a hook on said latch body projecting radially inwardly from said latch body into said passageway for radial movement into said groove in response to axial alignment of said hook with said groove to prevent axial movement of said ferrule relative said boss with said tubular portion having peripheral surface contact with said boss on each axial side of said latch hook to avoid distortion of said ferrule wall and to insure coupling of the ferrule to said boss, a second reduced diameter tubular portion integrally formed between said first tubular portion and said ferrule one end for engaging said recessed periphery to provide an extended alignment surface for said ferrule, a radial wall formed between said first and second tubular portions to engage said peripheral shoulder for resisting thrust forces, and a lever integrally formed at the end of said latch body opposite said open end and extending towards said open end and spaced radially outwardly of said latch body whereby radially inwardly directed pressure on said lever flexes said latch body radially outwardly about the juncture of said latch body and first tubular portion to move said hook from said boss groove and enable detachment of said ferrule from said boss.

Claim 9

In a speedometer coupling arrangement for coupling the rotating core of a speedometer cable to a magnet shaft rotatably carried in a cylindrical speedometer casing boss projecting from a speedometer frame, with said boss having a peripheral groove intermediate the leading end of said boss and the speedometer end of said boss together with a recessed periphery between said groove and the leading end of said boss to form a peripheral shoulder intermediate said leading end and said groove, the improvement comprising: a unitary plastic ferrule adapted to be fixed to said cable at one end and having an open end first tubular portion opposite said one end for receiving said leading end with the internal diameter of said tubular portion corresponding to said boss for coaxial engagement with said boss, an axially extending passageway in the annular wall of said tubular portion spaced intermediate the open end of said tubular portion and the opposite end of said tubular portion, a latch body integrally formed on said tubular portion intermediate the axially extending sides of said passageway and having a single juncture with said tubular portion at an axial position terminating said passageway adjacent said open end for flexure radially about the juncture of said latch body and said tubular portion, a hook on said latch body projecting radially inwardly from said latch body into said passageway for radial movement into said groove in response to axial alignment of said hook with said groove to prevent axial movement of said ferrule relative said boss with said tubular portion having peripheral surface contact with said boss on each axial side of said latch hook to avoid distortion of said ferrule wall and to insure coupling of the ferrule to said boss, a second reduced diameter tubular portion integrally formed between said first tubular portion and said ferrule one end for engaging said recessed periphery to provide an extended alignment surface for said ferrule, a radial wall formed between said first and second tubular portions to engage said peripheral shoulder for resisting thrust forces, and a lever integrally formed at the end of said latch body opposite said open end and extending towards said open end and spaced radially outwardly of said latch body whereby radially inwardly directed pressure on said lever flexes said latch body radially outwardly about the juncture of said latch body and first tubular portion to move said hook from said boss groove and enable detachment of said ferrule from said boss.