Hall-effect ferrous-article-proximity sensor assembly

A magnetic-field sensor assembly comprising:

• (a) a preformed housing shell having a first end which includes an opening, and a second end which includes a window;
• (b) a sensor package including an integrated-circuit magnetic-field-sensor chip encapsulated in a protective body with first and second opposite and mutually parallel faces and a plurality of conductive leads, each lead having a proximal portion, a distal portion, and a central portion, the proximal portion of each of said plurality of leads extending from said body, the central portion of said plurality of leads extending away from the body and positioned substantially normal to the faces of the body, said sensor-package body being positioned in said housing shell part way through said window with said first body face extending outwardly from said housing shell and with said lead distal portions extending from said housing shell through said opening;
• (c) a magnet having a first end and a second end and positioned in said housing shell with said first end adjacent to said second sensor-package body face;
• and
• (d) an endcap adapted to close said opening in said housing shell, wherein said housing shell is provided with an outer surface between the ends of the housing shell, which outer surface has a cross-section in the form of a first truncated circle, and wherein said housing shell is provided with an inner surface with a side wall between the ends of the housing shell, which side wall has a first curved portion and a second portion which forms a flat structure, so that the inner surface, as defined by the curved portion and the flat structure, has a cross-section in the form of a second truncated circle, and grooves formed in said second portion which allow the leads to pass along the shell within the cross-sectional segment which complements said second truncated circle, so as to allow minimization of the diameter of the said first truncated circle.

A magnetic-field sensor assembly comprising:

• (a) a preformed housing shell having a first end which includes an opening, and a second end which includes a window;
• (b) a sensor package including an integrated-circuit magnetic-field-sensor chip encapsulated in a protective body with first and second opposite and mutually parallel faces and a plurality of conductive leads, each lead having a proximal portion, a distal portion, and a central portion, the proximal portion of each of said plurality of leads extending from said body, the central portion of said plurality of leads extending away from the body and positioned substantially normal to the faces of the body, said sensor-package body being positioned in said housing shell part way through said window with said first body face extending outwardly from said housing shell and with said lead distal portions extending from said housing shell through said opening;
• (c) a magnet having a first end and a second end and positioned in said housing shell with said first end adjacent to said second sensor-package body face;
• and
• (d) an endcap adapted to close said opening in said housing shell, wherein said housing shell is provided with an inner surface with a side wall between the ends of the housing shell, which side wall has a first curved portion and a second portion which forms a flat structure, said second portion being formed of parallel lands and grooves, said grooves being adapted to receive and maintain a fixed parallel spacing of the leads as they pass through the inside of the housing shell.

A magnetic-field sensor assembly comprising:

• (a) a preformed housing shell having a first end which includes an opening, and a second end which includes a window;
• (b) a sensor package including an integrated-circuit magnetic-field-sensor chip encapsulated in a protective body with first and second opposite and mutually parallel faces and a plurality of conductive leads, each lead having a proximal portion, a distal portion, and a central portion, the proximal portion of each of said plurality of leads extending from said body, the central portion of said plurality of leads extending away from the body and positioned substantially normal to the faces of the body, said sensor-package body being positioned in said housing shell part way through said window with said first body face extending outwardly from said housing shell and with said lead distal portions extending from said housing shell through said opening;
• (c) a magnet having a first end and a second end and positioned in said housing shell with said first end adjacent to said second sensor-package body face;
• and
• (d) an endcap adapted to close said opening in said housing shell, wherein said housing shell is provided with an inner surface which includes grooves which have a bottom and two upper edges, and which grooves are deep enough that when a lead is placed in the bottom of a groove, the uppermost part of the lead is substantially below the upper edges of the groove, so that a flat object resting on the upper edges of the groove will not be in contact with the lead.

A magnetic-field sensor assembly comprising:

• (a) a preformed housing shell having a first end which includes an opening, and a second end which includes a window;
• (b) a sensor package including an integrated-circuit magnetic-field-sensor chip encapsulated in a protective body with first and second opposite and mutually parallel faces and a plurality of conductive leads, each lead having a proximal portion, a distal portion, and a central portion, the proximal portion of each of said plurality of leads extending from said body, the central portion of said plurality of leads extending away from the body and positioned substantially normal to the faces of the body, said sensor-package body being positioned in said housing shell part way through said window with said first body face extending outwardly from said housing shell and with said lead distal portions extending from said housing shell through said opening;
• (c) a magnet having a first end and a second end and positioned in said housing shell with said first end adjacent to said second sensor-package body face;
• and
• (d) an endcap adapted to close said opening in said housing shell, wherein said housing shell is provided with an inner surface which includes grooves which have a bottom and two upper edges, and which grooves are deep enough that when a lead is placed in the bottom of a groove, the uppermost part of the lead is substantially below the upper edges of the groove, so that a flat object resting on the upper edges of the groove will not be in contact with the lead, and wherein the chip body is held immovable and as a result the proximal ends of the leads are held at the bottom of the grooves, and wherein the endcap is provided with endcap grooves which engage the distal portion of the leads and as a result the distal portion of the leads are held at the bottom of the grooves, so that the leads are held at the bottom of the grooves and separate from one another.

A magnetic-field sensor assembly comprising:

• (a) a preformed housing shell having a first end which includes an opening, and a second end which includes a window;
• (b) a sensor package including an integrated-circuit magnetic-field-sensor chip encapsulated in a protective body with first and second opposite and mutually parallel faces and a plurality of conductive leads, each lead having a proximal portion, a distal portion, and a central portion, the proximal portion of each of said plurality of leads extending from said body, the central portion of said plurality of leads extending away from the body and positioned substantially normal to the faces of the body, said sensor-package body being positioned in said housing shell part way through said window with said first body face extending outwardly from said housing shell and with said lead distal portions extending from said housing shell through said opening;
• (c) a magnet having a first end and a second end and positioned in said housing shell with said first end adjacent to said second sensor-package body face;
• and
• (d) an endcap adapted to close said opening in said housing shell, wherein said housing shell is provided with an inner surface which includes grooves which have a bottom and two upper edges, and which grooves are deep enough that when a lead is placed in the bottom of a groove, the uppermost part of the lead is substantially below the upper edges of the groove, so that an object resting on the upper edges of the groove will not be in contact with the lead, and wherein the chip body is held immovable and as a result the proximal ends of the leads are held at the bottom of the grooves, and wherein the endcap is provided with endcap grooves which engage the distal portion of the leads and as a result the distal portion of the leads are held at the bottom of the grooves, so that the leads are held at the bottom of the grooves and separate from one another.

A magnetic-field sensor assembly comprising:

• (a) a preformed housing shell having a first end which includes an opening, and a second end which includes a window;
• (b) a sensor package including an integrated-circuit magnetic-field-sensor chip encapsulated in a protective body with first and second opposite and mutually parallel faces and a plurality of conductive leads, each lead having a proximal portion, a distal portion, and a central portion, the proximal portion of each of said plurality of leads extending from said body in a common plane, the central portion of said plurality of leads extending away from the body and positioned substantially normal the faces of the body, said sensor-package body being positioned in said housing shell part way through said window with said first body face extending outwardly from said housing shell and with said lead distal portions extending from said housing shell through said opening;
• (c) a magnet having a first end and a second end and positioned in said housing shell with said first end adjacent to said second sensor-package body face;
• and
• (d) a closing means adapted to obstruct said opening in said housing shell so that items in the shell cannot exit the shell, wherein said leads are integral, each forming an uninterrupted conductive path from said chip within said protective body through said closing means at said first end opening.