Terminal for medical instrument

In combination for providing for introduction of a terminal lead from a heart pacemaker into the body of a patient,

• a lid for the heart pacemaker,
• an electrical terminal pin,
• a ferrule made from an electrically conductive material and having a hollow configuration and disposed in spaced and concentric relationship to the terminal pin and supported by the lid,
• an electrical filter disposed in concentric relationship to the terminal pin and within the ferrule and having properties of passing signals only within a particular range of frequencies,
• first means disposed within the ferrule for maintaining the electrical filter in fixed and concentric relationship to the terminal pin and the ferrule,
• second means having insulating properties and maintaining the terminal pin and the ferrule in fixed and insulating relationship with a long leakage path between the terminal pin and the ferrule for the flow of electrical current, and
• third means disposed on the second means and supporting the terminal lead and introducing the electrical signals on the terminal pin to the terminal lead.

In combination for providing for introduction of a terminal lead from a heart pacemaker into the body of a patient,

• a lid for the heart pacemaker,
• an electrical terminal pin,
• a ferrule made from an electrically conductive material and having a hollow configuration and disposed in spaced and concentric relationship to the terminal pin and supported by the lid,
• a filter disposed on the terminal pin and within the ferrule in concentric relationship with the ferrule,
• means maintaining the electrical terminal pin, the filter and the ferrule in spaced and hermetically sealed and electrically insulating relationship and providing a long path for the flow of leakage current between the terminal pin and the ferrule, and
• an electrically conductive catheter block disposed in electrically communicating relationship with the terminal pin and supported by the insulating means and engaging the terminal lead in a fixed relationship to provide for the introduction of electrical signals from the terminal pin to the terminal lead.

In combination for use in a heart pacemaker constructed to be disposed in the body of a patient,

• a ferrule having electrically conductive properties and having an external flange,
• a terminal pin disposed within the ferrule,
• means having insulating properties and fused to the terminal pin and the ferrule for maintaining the terminal pin in fixed relationship to the ferrule and for providing a long path for any leakage of electrical current between the terminal pin and the ferrule,
• a filter disposed on the terminal pin and within the ferrule in fixed relationship with the ferrule and having properties of passing signals only within a particular frequency range,
• means for maintaining the filter on the terminal pin and within the ferrule in fixed relationship with the ferrule, and
• a lid disposed on the ferrule against the flange.

In combination for providing for the introduction of a terminal lead from a heart pacemaker into the body of a patient,

• a lid for the heart pacemaker,
• an electrical terminal pin,
• means for supporting the terminal pin in electrically insulated relationship to the lid including
• first support means enveloping the electrical terminal pin and disposed in spaced relationship to the terminal pin and engaging the lid,
• first insulating means disposed between the terminal pin and the first support means for maintaining the terminal pin in fixed and spaced relationship to the first support means and for providing a long path for the leakage of electrical current between the terminal pin and the lid to maintain the terminal pin in electrically insulated relationship to the lid, and
• second insulating means supported by the first support means and extending from the first support means, and
• second support means disposed in electrically communicating relationship with the terminal pin and supporting the terminal lead for introduction of the electrical signals on the terminal pin to the terminal lead, and
• an electrical filter disposed within the first support means in fixed relationship to the first support means and provided with characteristics to pass to the patient from the heart pacemaker electrical signals having only particular frequencies.

In combination for providing for the introduction of signals to a terminal lead in a heart pacemaker,

• a lid for the heart pacemaker,
• a terminal pin,
• a conductive ferrule enveloping the terminal pin in spaced relationship to the terminal pin, the ferrule engaging the lid to position the lid,
• a catheter block engaging the terminal pin and supporting the terminal lead to provide for the introduction of signals from the terminal pin to the terminal lead,
• first insulating means disposed between the terminal pin and the ferrule and hermetically sealing the terminal pin and the ferrule and hermetically sealing the terminal pin and the lid, and
• second insulating means disposed on the terminal pin between the first insulating means and the ferrule and supporting the catheter block in spaced relationship to the ferrule.

In combination for providing for the introduction of signals to a terminal lead in a heart pacemaker,

• a lid for the heart pacemaker,
• a terminal pin,
• a conductive ferrule enveloping the terminal pin in spaced relationship to the terminal pin, the ferrule abutting the lid and being attached to the lid,
• a catheter block disposed on the terminal pin in spaced relationship to the ferrule and the lid and attached to the terminal pin, and
• insulating means disposed between the terminal pin and the ferrule and between the ferrule and the catheter block and hermetically sealing the terminal pin relative to the ferrule and the lid and insulating the terminal pin relative to the ferrule and the lid.