US3829826A - Cable fastener for electrocardiograph electrodes - Google Patents

Cable fastener for electrocardiograph electrodes Download PDF

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Publication number
US3829826A
US3829826A US28274272A US3829826A US 3829826 A US3829826 A US 3829826A US 28274272 A US28274272 A US 28274272A US 3829826 A US3829826 A US 3829826A
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Grant
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Prior art keywords
region
cable
portion
coupling
fastener
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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D Brown
R Dennison
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HP Inc
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HP Inc
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R11/00Connectors providing two or more spaced connecting locations for conductive members which are thereby interconnected; End pieces for wires or cables, supported by the wire or cable and for facilitating electrical connection to some other wire, terminal, or conductive member
    • H01R11/11End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/22End pieces terminating in a spring clip
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/04Detecting, measuring or recording bioelectric signals of the body or parts thereof
    • A61B5/0402Electrocardiography, i.e. ECG
    • A61B5/0408Electrodes specially adapted therefor
    • A61B5/0416Electrodes specially adapted therefor connected by means of snap fasteners
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/45Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
    • Y10T24/45225Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
    • Y10T24/45602Receiving member includes either movable connection between interlocking components or variable configuration cavity
    • Y10T24/45775Receiving member includes either movable connection between interlocking components or variable configuration cavity having resiliently biased interlocking component or segment
    • Y10T24/45796Receiving member includes either movable connection between interlocking components or variable configuration cavity having resiliently biased interlocking component or segment and closed elongated access opening for guiding transverse projection travel after insertion
    • Y10T24/45801Nonresilient walls define opening

Abstract

A cable fastener provides an electrically conducting mechanical connection between a standard male snap fastener commonly used as an electrocardiograph electrode and a cable. The male snap fastener is positively held in contact with the cable fastener by a spring.

Description

United States Patent 1 1 1111 3,829,826 Brown et al. Aug. 13, 1974 CABLE FASTENER FOR 1,933,027 10/1933 Paradun 339/261 ELECTROCARDIOGRAPH ELECTRODES 2,128,513 8/1938 Dotterer 339/262 R 3,542,010 ll/l970 Love l28/2.l E [75] Inventors: Donald o Bedford; Roger 3,606,881 9/1971 Woodson 128/206 E E. Dennison, Waltham, both of Mass.

[73] Assignee: Hewlett-Packard Company, Palo f f Gilliam Alto, Calif. Assistant ExammerLawrence .I. Staab Attorney, Agent, or FirmStephen P. Fox [22] Flledz Aug. 22, 1972 [21] Appl. No.: 282,742

52 US. Cl. 339/255 R, 24/218, 128/206 E, [57] ABSTRACT 339/260 [51] Int. Cl H011 11/22 A Cable fastener Provldes an electrically conductmg 5 Field f Search 24 0 1 5 G 2 2 mechanical connection between a standard male snap 2 257; 339/223 252 R, 252 F7 25 S, 5 fastener commonly used as an electrocardiograph T, 255 2 04 2; 12 2 E 2 0 E, 40 electrode and a cable. The male snap fastener is posi- DIG 4; 339/103 R 0 TP, 1 0 52 tively held in Contact with the cable fastener by a spring. [56] References Cited UNITED STATES PATENTS 3 Claims, 4 Drawing Figures l,l63,37l l2/l9l5 Schade 339/260 PATENTED M1 1 3 I974 III I 21$ 2 CABLE FASTENER FOR ELECTROCARDIOGRAPH ELECTRODES BACKGROUND OF THE INVENTION In patient monitoring applications, several different types of cable fasteners have been used to couple electrical impulses from an electrode on a patients body to a cable connected to an electrocardiograph or other fully hard push is often necessary to make a good connection. This type of snap fastener though simple and inexpensive to produce is difficult to repair.

Some departures have been made from the above described snap. One example is a hairpin and turn-cam fastener. This type of fastener makes a good electrical connection when new and allows simple application without pressing upon sensitive areas of the patient. The joint between cable and fastener is by a tubular solderless connector which is crimped on the fastener and the cable, and then covered with shrink tubing. Unfortunately the fastener is expensive to make. It offers very little strain relief, and physically fatigues early in life thereby causing loose connections. The electrical contact surface is only four pin point surfaces, which wear away very quickly. The length of the connector provides leverage which, when lifting the cable, often pries the connector off the snap. Because shielded wire cables work best when the exposed metallic fastenings are as small as possible, the length of this type of fastener is much too great to enhance the benefits of shielded cable. Also, whenever a patient rolls upon this type of fastener, he will likely receive a discomforting jab from its end, or cause the fastener to come off the electrode.

SUMMARY OF THE INVENTION Accordingly it is an objective of this invention to provide a cable fastener which engages male snap fasteners of several manufacturers and slight size variations. The illustrated embodiment of the cable fastener of this invention includes a metal bracket and a spring wire joined together. The metal bracket has a clearance hole which fits over all of the male snaps which are expected to be encountered and has an offset to allow connections to cup-mounted snaps. The spring wire provides mechanical retention, and by holding the bracket in contact with the snap, a durable electrical connection. A partial loop on the spring wire forms a finger pad for engaging and disengaging the fastener from the snap.

The cable fastener mates with the male snap of an electrocardiograph electrode, for example, as it is mounted on a flat surface or seated in a cup depression. The fastener provides a good electrical connection throughout its full life and is small to allow shielding of the cable right up to the skin connection with the patient. It provides axial strain relief for the wire connection, and torsional strain relief of the cable jacket from any molded shell or handle. It is easily applied with one hand without pressing upon patient, and causes no discomfort when the patient rolls upon it. When a sharp yank is applied to the cable, the cable fastener comes off the electrode, rather than the electrode adhesive parting from the skin. Re-application of the cable is faster and safer for patient monitoring than reapplication of the electrode. The fastener is able to swivel about the snap while maintaining good electrical and mechanical connections. The fastener is also simple and inexpensive to manufacture.

DESCRIPTION OF THE DRAWING FIG. 1 is a top view of the preferred embodiment of a cable fastener for electrocardiograph electrodes.

FIG. 2 is a side view of the preferred embodiment.

FIG. 3 is a perspective view of the preferred embodiment showing a connection to a male snap.

FIG. 4 is a perspective view of the preferred embodiment showing a connection to a male snap in a cup shaped depression.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to FIGS. 1 and 2 there is shown the preferred embodiment of a cable-to-snap fastener.

The fastener 10 consists of a metal bracket 11 and a spring wire 20 joined together to make one assembly. The metal bracket 11 has a clearance slot 12 which fits over all of the male snaps expected to be encountered and has coupling region connected to a connective region forming a Z-offset 13 to allow connections to cupmounted snaps.

Referring to FIG. 1 and the pyriform opening shown, the clearance slot 12 has two converging sides which fit around the small diameter of the snap fastener.

Two tabs 14 are provided on the bracket 11 which can be crimped around the lead to provide axial strain relief. The spring wire 20 provides mechanical retention, and by holding the edge of the clearance slot 12 against the electrode snap, provides good electrical connection regardless of cable orientation around snap. A partial loop 21 on the end of the spring wire form serves as a finger pad for right index finger operation to engage or disengage the fastener 10 from the snap. This assembly is intended as both a unit for field repair, to be covered with only shrink tubing after crimp and soldering to lead; and as connector to be factory molded with a plastic handle over the wire-bracket joint. The application of the entire assembly involves grasping the fastener 10 between right thumb and right middle finger, while squeezing the spring 20 with the right index finger toward the tabs 14 enough to set the slot 12 over the snap. The spring 20 is .then released to I secure the connection. The fastener is removed in a similar manner. The spring wire 20 is attached to the bracket ll-on the underside. It passes above the slot 12 close to the surface of the bracket 11, and is disposed as a terminating portion beneath the bracket 11 and on .the opposite side of the connective region of the offset 13 from the clearance slot 12 as shown in FIGS. 1 and 2 so it is protected against damage.

We claim: 1. A cable fastener for coupling a cable to an electrode for attachment to a patient comprising:

a bracket having a generally planar handle region, a generally planar coupling region and a generally planar connective region;

the coupling region including a clearance slot having a first portion which is wider than a second portion;

the connective region being of predetermined length and having two ends, connected atone end to the coupling region and at another end to the handle region, said handle and coupling regions being essentially parallel and separated by said predetermined length; and

spring wire means comprising:

a. a base portion connected to the handle region,

b. a coil portion connected to the base portion for providing bias force,

6. a straight portion connected to the coil portion and situated entirely between planes defined by the handle region and the coupling region, the straight portion intersecting and disposed across 2. A cable fastener as in claim 1 wherein the bracket includes two bendable tabs for coupling a cable to the cable fastener.

3. A cable fastener as in claim 1 wherein the clearance slot is of a pyriform shape.

Claims (3)

1. A cable fastener for coupling a cable to an electrode for attachment to a patient comprising: a bracket having a generally planar handle region, a generally planar coupling region and a generally planar connective region; the coupling region including a clearance slot having a first portion which is wider than a second portion; the connective region being of predetermined length and having two ends, connected at one end to the coupling region and at another end to the handle region, said handle and coupling regions being essentially parallel and separated by said predetermined length; and spring wire means comprising: a. a base portion connected to the handle region, b. a coil portion connected to the base portioN for providing bias force, c. a straight portion connected to the coil portion and situated entirely between planes defined by the handle region and the coupling region, the straight portion intersecting and disposed across said clearance slot in close proximity to the surface of the coupling region, d. a partial loop portion connected to the straight portion, the plane of the loop portion being approximately perpendicular to the plane of the coupling region, and e. a terminating portion, one end of which is connected to the partial loop portion, the other end of which is disposed between the handle region and the coupling region, and on the opposite side of the connective region from the clearance slot.
2. A cable fastener as in claim 1 wherein the bracket includes two bendable tabs for coupling a cable to the cable fastener.
3. A cable fastener as in claim 1 wherein the clearance slot is of a pyriform shape.
US3829826A 1972-08-22 1972-08-22 Cable fastener for electrocardiograph electrodes Expired - Lifetime US3829826A (en)

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US3829826A US3829826A (en) 1972-08-22 1972-08-22 Cable fastener for electrocardiograph electrodes

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US3829826A US3829826A (en) 1972-08-22 1972-08-22 Cable fastener for electrocardiograph electrodes

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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013336A (en) * 1976-03-25 1977-03-22 Broberg Jr Dewey O Connector clip
US4220387A (en) * 1979-04-02 1980-09-02 Bunker Ramo Corporation Medical clip
US4303293A (en) * 1979-10-17 1981-12-01 Harco Electronics Limited Connection for electrodes
US4304453A (en) * 1979-10-26 1981-12-08 Harco Electronics Limited Articulable article clamp
US4325467A (en) * 1978-02-27 1982-04-20 Shimano Industrial Company Limited Bicycle which facilitates wheel removal
US4332257A (en) * 1980-02-11 1982-06-01 Bunker Ramo Corporation Medical clip and electrode constructions
US4545639A (en) * 1983-07-06 1985-10-08 Motorola, Inc. Movable electrical contact capable of accommodating devices exhibiting a plurality of different sizes
US4555155A (en) * 1983-11-28 1985-11-26 Minnesota Mining And Manufacturing Company Bioelectrode connector
US4665650A (en) * 1986-05-12 1987-05-19 Hall Richard C Control gate assembly
US4685467A (en) * 1985-07-10 1987-08-11 American Hospital Supply Corporation X-ray transparent medical electrodes and lead wires and assemblies thereof
US5209679A (en) * 1991-08-23 1993-05-11 Graphic Controls Corporation Adaptive medical electrode connector with male stud
US20050183240A1 (en) * 2004-02-19 2005-08-25 Guy Watkins Automatic Lift and Turn Hinge and Gate
US20090318793A1 (en) * 2008-06-24 2009-12-24 Keshava Datta Disposable Patch and Reusable Sensor Assembly for Use in Medical Device Localization and Mapping Systems
US20090318796A1 (en) * 2008-06-24 2009-12-24 Keshava Datta Patch and sensor assembly for use in medical device localization and mapping systems
WO2010008776A2 (en) 2008-06-23 2010-01-21 Janssen Pharmaceutica Nv Disposable patch and reusable sensor assembly for use in medical device localization and mapping systems
EP2070474A3 (en) * 2007-12-11 2012-04-04 Tyco Healthcare Group LP ECG Electrode Connector
EP2468181A1 (en) 2010-12-23 2012-06-27 Biosense Webster, Inc. Single radio-transparent connector for multi-functional reference patch
USD737979S1 (en) 2008-12-09 2015-09-01 Covidien Lp ECG electrode connector
US9226680B1 (en) 2013-02-12 2016-01-05 David Kendricks Patient electrode connectors for electrocardiograph monitoring system
US9408547B2 (en) 2011-07-22 2016-08-09 Covidien Lp ECG electrode connector
US9408546B2 (en) 2013-03-15 2016-08-09 Covidien Lp Radiolucent ECG electrode system
USD771818S1 (en) 2013-03-15 2016-11-15 Covidien Lp ECG electrode connector
US9693701B2 (en) 2013-03-15 2017-07-04 Covidien Lp Electrode connector design to aid in correct placement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1163371A (en) * 1912-05-22 1915-12-07 Fahnestock Electric Company Fastening device for electrical conductors.
US1933027A (en) * 1931-10-12 1933-10-31 Paradun Peter Conductor wire clip
US2128513A (en) * 1935-04-08 1938-08-30 R B M Mfg Company Terminal assembly
US3542010A (en) * 1969-02-19 1970-11-24 Winston A Love Surface contacting electrode assembly having electrically conductive pile forming contact surface
US3606881A (en) * 1970-02-20 1971-09-21 Riley D Woodson Conductive rubber electrode

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1163371A (en) * 1912-05-22 1915-12-07 Fahnestock Electric Company Fastening device for electrical conductors.
US1933027A (en) * 1931-10-12 1933-10-31 Paradun Peter Conductor wire clip
US2128513A (en) * 1935-04-08 1938-08-30 R B M Mfg Company Terminal assembly
US3542010A (en) * 1969-02-19 1970-11-24 Winston A Love Surface contacting electrode assembly having electrically conductive pile forming contact surface
US3606881A (en) * 1970-02-20 1971-09-21 Riley D Woodson Conductive rubber electrode

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013336A (en) * 1976-03-25 1977-03-22 Broberg Jr Dewey O Connector clip
US4325467A (en) * 1978-02-27 1982-04-20 Shimano Industrial Company Limited Bicycle which facilitates wheel removal
US4220387A (en) * 1979-04-02 1980-09-02 Bunker Ramo Corporation Medical clip
US4303293A (en) * 1979-10-17 1981-12-01 Harco Electronics Limited Connection for electrodes
US4304453A (en) * 1979-10-26 1981-12-08 Harco Electronics Limited Articulable article clamp
US4332257A (en) * 1980-02-11 1982-06-01 Bunker Ramo Corporation Medical clip and electrode constructions
US4545639A (en) * 1983-07-06 1985-10-08 Motorola, Inc. Movable electrical contact capable of accommodating devices exhibiting a plurality of different sizes
US4555155A (en) * 1983-11-28 1985-11-26 Minnesota Mining And Manufacturing Company Bioelectrode connector
US4685467A (en) * 1985-07-10 1987-08-11 American Hospital Supply Corporation X-ray transparent medical electrodes and lead wires and assemblies thereof
US4665650A (en) * 1986-05-12 1987-05-19 Hall Richard C Control gate assembly
US5209679A (en) * 1991-08-23 1993-05-11 Graphic Controls Corporation Adaptive medical electrode connector with male stud
US20050183240A1 (en) * 2004-02-19 2005-08-25 Guy Watkins Automatic Lift and Turn Hinge and Gate
US7155779B2 (en) 2004-02-19 2007-01-02 Logical Decisions, Inc. Automatic lift and turn hinge and gate
US8408948B2 (en) 2007-12-11 2013-04-02 Covidien Lp ECG electrode connector
EP2856938A3 (en) * 2007-12-11 2015-05-20 Covidien LP ECG electrode connector
US9107594B2 (en) 2007-12-11 2015-08-18 Covidien Lp ECG electrode connector
US8795004B2 (en) 2007-12-11 2014-08-05 Covidien, LP ECG electrode connector
EP2070474A3 (en) * 2007-12-11 2012-04-04 Tyco Healthcare Group LP ECG Electrode Connector
US8690611B2 (en) 2007-12-11 2014-04-08 Covidien Lp ECG electrode connector
WO2010008776A2 (en) 2008-06-23 2010-01-21 Janssen Pharmaceutica Nv Disposable patch and reusable sensor assembly for use in medical device localization and mapping systems
US9737225B2 (en) 2008-06-24 2017-08-22 Biosense Webster, Inc. Patch and sensor assembly for use in medical device localization and mapping systems
EP2520223A1 (en) 2008-06-24 2012-11-07 Biosense Webster, Inc. Disposable patch and reusable sensor assembly for use in medical device localization and mapping systems
EP2389860A1 (en) 2008-06-24 2011-11-30 Biosense Webster, Inc. Disposable patch and reusable sensor assembly for use in medical device localization and mapping systems
US9014778B2 (en) 2008-06-24 2015-04-21 Biosense Webster, Inc. Disposable patch and reusable sensor assembly for use in medical device localization and mapping systems
US20090318796A1 (en) * 2008-06-24 2009-12-24 Keshava Datta Patch and sensor assembly for use in medical device localization and mapping systems
US20090318793A1 (en) * 2008-06-24 2009-12-24 Keshava Datta Disposable Patch and Reusable Sensor Assembly for Use in Medical Device Localization and Mapping Systems
USD737979S1 (en) 2008-12-09 2015-09-01 Covidien Lp ECG electrode connector
EP2468181A1 (en) 2010-12-23 2012-06-27 Biosense Webster, Inc. Single radio-transparent connector for multi-functional reference patch
US9375179B2 (en) 2010-12-23 2016-06-28 Biosense Webster, Inc. Single radio-transparent connector for multi-functional reference patch
US9408547B2 (en) 2011-07-22 2016-08-09 Covidien Lp ECG electrode connector
US9737226B2 (en) 2011-07-22 2017-08-22 Covidien Lp ECG electrode connector
US10010257B1 (en) 2013-02-12 2018-07-03 Advantage Medical Electronics, Llc Patient electrode connectors for electrocardiograph monitoring system
US9226680B1 (en) 2013-02-12 2016-01-05 David Kendricks Patient electrode connectors for electrocardiograph monitoring system
USD771818S1 (en) 2013-03-15 2016-11-15 Covidien Lp ECG electrode connector
US9693701B2 (en) 2013-03-15 2017-07-04 Covidien Lp Electrode connector design to aid in correct placement
US9814404B2 (en) 2013-03-15 2017-11-14 Covidien Lp Radiolucent ECG electrode system
US9408546B2 (en) 2013-03-15 2016-08-09 Covidien Lp Radiolucent ECG electrode system

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