1. An electrical connector for mounting on a printed circuit board comprising:
an insulative housing comprising a mounting surface for mounting on the printed circuit board, a front face and an opposite rear face, and at least one receiving space extending from the rear face toward the front face; and
at least one terminal unit assembled to the insulative housing and comprising a plurality of signal contacts received in the housing, a first switch contact comprising a first base portion retained in the housing, a first spring arm extending from the first base portion, and an insulative separator disposed about the first spring arm and extending into the receiving space, and a second switch contact comprising a second base portion retained in the housing and a second arm extending from the second base portion, wherein when a mating plug inserts into the receiving space, the separator is engaged by the mating plug to move in roughly a radial direction perpendicular to a mating axial direction, and thus drive the first switch contact to connect the second switch contact;
a cavity being formed in the front face of the housing;
a mating port defining a rear section received in said cavity, and a front circular section extending beyond the front face of the housing under a condition that one grounding contact defines a distal contacting end disnosed in the mating port around a joint portion of said rear section and said front section;
a metallic shield enclosing said housing and including a front wall covering the front face with a corresponding circular opening through which the front circular section extends;
the separator defining a position where said mating plug is engaged, said position being located in an innermost area of the receiving space and far away from said distal contacting end of the grounding contact.
2. The electrical connector as described in claim 1, wherein the first spring arm defines a pair of openings in opposite sides of the free end thereof.
3. The electrical connector as described in claim 2, wherein the separator defines an engaging groove engaging with the openings of the first spring arm.
4. The electrical connector as claimed in claim 2, wherein the front circular section of the mating port defines a recess in which the distal contacting end of said grounding contact is protectively received and hidden.
5. The electrical connector as described in claim 1, wherein each switch contact defines a tail portion extending vertically from a bottom edge of the base portion.
6. The electrical connector as described in claim 1, wherein the housing defines a plurality of first and second slots communicating with the receiving space to receive the signal contacts and the first and second switch contacts, respectively.
7. The electrical connector as described in claim 6, wherein the first switch contact and the second switch contact are alternately arranged in the housing.
8. The electrical connector as claimed in claim 1, wherein the front circular section of the mating port defines a recess in which the distal contacting end of said grounding contact is protectively received and hidden.
9. An electrical connector assembly comprising:
an insulative housing defining a mating face and a receiving space extending therefrom inwardly;
a first switch contact disposed in the housing and defining a first spring arm extending around the receiving space;
a second switch contact disposed in the housing; and
an insulative separator moveable relative to the housing and essentially located in an insertion path of a plug which is adapted to be inserted into the receiving space; wherein
when said plug is inserted into the receiving space, said insulative separator is engaged with said plug and moved to actuate the first switch contact to be commonly moved to shift an engagement status between said first switch contact and said second switch contact;
a cavity being formed in the mating face of the housing;
a mating port defining a rear section received in said cavity, and a front circular section extending beyond the mating face of the housing under a condition that one grounding contact defines a distal contacting end disposed in the mating port around a joint portion of said rear section and said front section;
a metallic shield enclosing said housing and including a front wall covering the mating face with a corresponding circular opening through which the front circular section extends;
the separator defining a position where said mating plug is engaged, said position being located in an innermost area of the receiving space and far away from said distal contacting end of the grounding contact.
10. The electrical connector assembly as described in claim 9, wherein both said first switch contact and said second switch contact are not directly engaged with the inserted plug.
11. The electrical connector assembly as described in claim 9, wherein said first switch contact is engaged with the second switch contact when said plug is inserted into the receiving space, and said first switch contact is disengaged from the second switch contact when said plug is removed from the receiving space.
12. The electrical connector assembly as described in claim 9, wherein said insulative separator is discrete from the housing and attached to the first switch contact.
13. The electrical connector assembly as described in claim 9, wherein both said separator and said first switch contact are moved generally in a radial direction.
14. The electrical connector as claimed in claim 9, wherein the front circular section of the mating port defines a recess in which the distal contacting end of said grounding contact is protectively received and hidden.
15. An electrical connector assembly comprising:
an insulative housing defining a mating face and a receiving space extending therefrom inwardly;
a first switch contact disposed in the housing;
a second switch contact disposed in the housing; and
an insulative separator being moveable relative to the housing in roughly a radial direction perpendicular to a mating direction, and disposed around said first switch contact, and essentially located in an insertion path of a plug which is adapted to be inserted into the receiving space along the mating direction; wherein
when said plug is inserted into the receiving space, none of said first switch contact and said second switch contact but said insulative separator is engaged with said plug under a condition that said insulative separator is moved so as to shift an engagement status between said first switch contact and said second switch contact;
a cavity being formed in the mating face of the housing:
a mating port defining a rear section received in said cavity, and a front circular section extending beyond the mating face of the housing under a condition that one grounding contact defines a distal contacting end disposed in the mating port around a joint portion of said rear section and said front section;
a metallic shield enclosing said housing and including a front wall covering the mating face with a corresponding circular opening through which the front circular section extends;
the separator defining a position where said mating plug is engaged, said position being located in an innermost area of the receiving space and far away from said distal contacting end of the grounding contact.
16. The electrical connector assembly as described in claim 15, wherein said first switch contact is engaged with the second switch contact when said plug is inserted into the receiving space, and said first switch contact is disengaged from the second switch contact when said plug is removed from the receiving space.
17. The electrical connector assembly as described in claim 15, wherein the insulative separator is constantly engaged with the first switch contact.
18. The electrical connector assembly as described in claim 15, wherein the insulative separator is discrete from the housing but constantly fastened to the first switch contact.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A system for monitoring the compression of the chest of a patient during CPR, said system comprising:
a chest compression monitor comprising an accelerometer adapted to sense upward and downward acceleration of the chest compression monitor, said compression monitor further adapted to output an acceleration signal indicative of the upward and downward acceleration of the chest, said compression monitor housed in a module adapted to be held in fixed relationship to a CPR provider’s wrist while the CPR provider is manually compressing the patient’s chest.
2. The system of claim 1 further comprising a releasable fixing mechanism for attaching the chest compression monitor to a CPR provider’s wrist.
3. The system of claim 1, further comprising a computer programmed to process the acceleration signal to determine the depth of chest compression and produce a compression signal indicative of the depth of compression of the patient’s chest.
4. The system of claim 1, wherein the computer is further programmed to provide an audible signal modulated to indicate when the proper chest displacement is achieved by the CPR provider.
5. The system of claim 1, wherein the computer is further programmed to determining the start of a compression without reference to a signal derived from a source external to the module, and thereafter calculate downward displacement of the chest using the acceleration signal; said computer further programmed to output a compression signal.
6. The system of claim 1 wherein:
the computer is further programmed to determine the start of a compression based on the acceleration signal, a zero-point of acceleration and changes in the direction of velocity of the module.
7. The system of claim 1 wherein:
the computer is further programmed to determine the end of a compression based on the acceleration signal, a zero-point of acceleration and changes in the direction of velocity of the module.
8. A method for monitoring the compression of the chest of a patient during CPR, said system comprising:
providing a chest compression monitor comprising an accelerometer adapted to sense upward and downward acceleration of the chest compression monitor, said compression monitor further adapted to output an acceleration signal indicative of the upward and downward acceleration of the chest, said compression monitor housed in a module fixed to a releasable fixing mechanism for fixing the module to the CPR provider’s wrist;
attaching the chest compression monitor to a CPR provider’s wrist with the releasable fixing mechanism;
measuring an acceleration signal provided by the accelerometer while the CPR provider is compressing the chest of the patient;
providing a computer operable to process the acceleration signal to determine the depth of chest compression and produce a compression signal indicative of the depth of compression of the patient’s chest, and processing the acceleration signal to determine the depth of chest compression and produce a compression signal indicative of the depth of compression of the patient’s chest.
9. The method of claim 8 further comprising the step of operating the computer to provide an audible signal modulated to indicate when the proper chest displacement is achieved by the CPR provider.
10. The method of claim 8 further comprising the step of operating the computer to determine the start of a compression without reference to a signal derived from a source external to the module, and thereafter calculate downward displacement of the chest using the acceleration signal.
11. The method of claim 8 further comprising the step of operating the computer to determine the start of a compression based on the acceleration signal, a zero-point of acceleration and changes in the direction of velocity of the module.
12. The method of claim 8 further comprising the step of operating the computer to determine the end of a compression based on the acceleration signal, a zero-point of acceleration and changes in the direction of velocity of the module.