EP0870975A2 - Lampe de poche à basse susceptibilité magnétique - Google Patents

Lampe de poche à basse susceptibilité magnétique Download PDF

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Publication number
EP0870975A2
EP0870975A2 EP98106642A EP98106642A EP0870975A2 EP 0870975 A2 EP0870975 A2 EP 0870975A2 EP 98106642 A EP98106642 A EP 98106642A EP 98106642 A EP98106642 A EP 98106642A EP 0870975 A2 EP0870975 A2 EP 0870975A2
Authority
EP
European Patent Office
Prior art keywords
battery
handle
lamp
flashlight
sleeve
Prior art date
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.)
Withdrawn
Application number
EP98106642A
Other languages
German (de)
English (en)
Other versions
EP0870975A3 (fr
Inventor
Jimmie B. Allred Iii
Earl L. Holdren Iii
Richard W. Mott
Charles L. Mozeko
Jack A. Belstadt
Jeffrey B. Mallon
Phillip S. Wutz
Michael F. Pyszczek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Greatbatch Ltd
Original Assignee
Greatbatch Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Greatbatch Ltd filed Critical Greatbatch Ltd
Publication of EP0870975A2 publication Critical patent/EP0870975A2/fr
Publication of EP0870975A3 publication Critical patent/EP0870975A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L2/00—Systems of electric lighting devices

Definitions

  • the present invention generally relates to a hand held medical device. More particularly, the present invention relates to a flashlight, and still more particularly to a flashlight that is constructed of materials having relatively low magnetic susceptibilities. This provides the flashlight of the present invention as a useful instrument in the vicinity of a magnetic resonance scanner.
  • U.S. Patent No. 4,607,623 to Bauman describes a hand held laryngoscope constructed of non-ferrous materials such as ABS with the electrically conductive portions provided by first applying a thin copper layer to the ABS followed by electroless plating and then electrolytically plating another copper layer to form a conductive layer about 0.5 to 2 mils thick. A thin layer of aluminum is subsequentially applied to the copper coating in those areas intended to be reflective.
  • the batteries powering this device are not further described, but may be of a nickel/cadmium type commonly used for such applications. Nickel/cadmium batteries are not considered to be relatively nonmagnetic and would not be useful with the flashlight of the present invention.
  • U.S. Patent Nos. 310,004 to Weston; 485,089 to Carhart; 2,282,979 to Murphy; 3,352,715 to Zaromb; 3,673,000 to Ruetschi and 4,318,967 to Ruetschi disclose anti- or non-magnetic materials in cells or batteries. Additionally, U.S. Patent Nos.
  • the flashlight of the present invention is constructed largely of metal components.
  • the metal components must be constructed of materials that have as low a magnetic susceptibility as possible.
  • the flashlights of the present invention is constructed of materials including metal components having very low magnetic susceptibilities. Those parts not made of metal are preferably formed of a thermoplastic material, for example an acetal compound such as DELRIN.
  • the battery powering the flashlight lamp is also constructed of materials having low magnetic susceptibility. Lithium batteries are preferred, and all components such as the casing, terminal leads, current collectors and collector leads, some of which are typically made of nickel, are constructed of stainless steel nonmagnetic austenitic.
  • the battery further includes a unique terminal configuration that prevents the inadvertent use of other batteries, including non-magnetic batteries, in the laryngoscope.
  • Fig. 1 is a perspective view of a flashlight 10 according to the present invention.
  • Fig. 2 is an exploded view of the head 14 and cage 116 parts of the flashlight 10.
  • Figs. 3A and 3B are exploded views of the flashlight 10 shown in Fig. 1.
  • Fig. 4A is a partial, cross-sectional view of a portion of the handle 12 and the head 14 for the flashlight 10.
  • Fig. 4B is a partial, cross-sectional view of the handle 12 and end cap 50 for the flashlight 10.
  • Fig. 5 is a plan view of the battery 32 for the flashlight 10.
  • Fig. 6 is a side, elevational view of the battery 32.
  • Figs. 1 to 6 show a flashlight 10 having low magnetic susceptibility characteristics according to the present invention generally comprised of a handle 12 and a head 14 supporting a lamp actuation means 16 mounted on the head 14 in a twistable relationship therewith to activate and deactivate the flashlight as desired.
  • the instrument is utilized to illuminate an object of interest, for example in a health care environment and particularly in close proximity of the strong magnetic fields of a magnetic resonance unit (not shown).
  • the handle 12 is a cylindrically-shaped tube comprising an intermediate section 18 meeting at a step 20 with a proximal section 22 having internal threads 24, and the intermediate section 18 meeting at a chamfer 26 with a distal section 28.
  • the outer surface of the handle 12 is provided with raised, knurled ridges 30 (Fig. 1) to aid in gripping the flashlight 10.
  • the handle 12 is preferably constructed of chrome plated brass.
  • a battery 32 (Figs. 3B, 4A, 4B, 5 and 6) is housed inside the intermediate handle Section 18 for providing power to a lamp means as an assembly 34, which will be described in detail hereinafter.
  • the battery 32 is constructed of materials having relatively low magnetic susceptibility with a unique terminal configuration according to the present invention.
  • the battery 32 is preferably an alkali metal battery and more preferably an alkali metal/liquid catholyte battery.
  • a most preferred chemistry utilizes the lithium/thionyl chloride-bromine chloride (Li/BCX) couple.
  • the battery casing adjacent to the distal handle section 28 is insulated to prevent electrical contact in the conventional manner.
  • the opposite end of the battery 32 includes a negative contact ring 36 that is permanently attached to the battery case to provide one terminal for the battery.
  • the central, positive terminal 38 is recessed and insulated 40 around its perimeter to prevent accidental shortening.
  • a non-magnetic fuse 42 prevents inadvertent run-away electrochemical reaction while a thermoplastic insulator plate 44 supported on a ledge of the insulated material 40 protects the positive terminal 38 and fuse 42.
  • a central opening 46 in plate 44 provides for access to the positive terminal 38.
  • all external and internal electrical components such as the casing, the terminals 36, 38, the current collectors and the contact leads are of stainless steel.
  • the unique terminal configuration prevents the inadvertent loading and discharge of batteries into the handle 12 not intended for use with the flashlight 10. Such inadvertent battery use could have detrimental affects on the flashlight's low magnetic susceptibility characteristics.
  • the battery 32 is secured inside the handle 12 by a cap spring 48, preferably of silver plated beryllium copper, that biases between the battery and an end cap 50 snug-fitted into the distal handle section 28 extending part way into the intermediate handle section 18.
  • the end cap 50 is of a non-magnetic material, such as an acetal thermoplastic material with an enlarged head 52 that abuts the distal end of handle 12.
  • a groove 54 formed between the cap head 52 and an annular protrusion 56 of the cap receives an O-ring 58 of a flexible elastomeric material for sealing the cap 50 in the distal section 28 of the handle 12.
  • a battery retainer assembly is threaded into the proximal handle section 22 and includes a battery retainer 60, preferably of an acetal thermoplastic material, that threads into the handle 12 to capture a battery pin 62, a battery spring 64, a tube disk 66 and a pair of spring contacts 68 therein.
  • the battery pin 62 is preferably of gold plated brass
  • the battery spring 64 is preferably of silver plated beryllium copper
  • the tube disk 66 is of an acetal thermoplastic material
  • the spring contacts 68 are of silver plated beryllium copper.
  • the battery retainer 60 comprises a threaded portion 70 sized to threadingly mate with the internal threads 24 of the proximal handle section 22.
  • the threaded portion 70 of the battery retainer 60 meets a cylindrically-shaped portion 72 that extends to a chamfer 74 ending at an end face 76.
  • the battery retainer 60 has a first, cylindrically-shaped bore 78 that meets at an internal shoulder 80 with a second, lesser diameter cylindrically-shaped bore 82 extending to the end face 76.
  • a pair of diametrically opposed openings 84 are provided through the thickness of the threaded portion 70.
  • the battery retainer 60 receives the battery pin 62 having a cylindrically-shaped body 86 provided with an annular protrusion 88 adjacent to a proximal end 90 thereof.
  • the internal threads 24 at the proximal handle section 22 terminate at an internal shoulder 92.
  • Shoulder 92 supports the tube disk 66 having a central opening 94.
  • the tube disk 66 also includes a pair of opposed channels 96 (shown in dashed lines in Fig. 3B) that communicate between the outer edge thereof and diametrically opposed portions of the opening 94.
  • the tube disk 66 supports the pair of spring contacts 68, each having a leg disposed in one of the disk channels 96 with a contact portion 98 of the springs extending from the opposite face of the tube disk 66.
  • the spring contacts 68 are captured between the shoulder 92 and the disk 66 with the contact portions 98 contacting the annular, negative terminal 36 of battery 32.
  • the tube disk 66 and spring contacts 68 are secured in this position by the battery retainer 60 threaded into the proximal handle section 22.
  • the battery retainer 60 further captures the battery pin 62 between itself and the tube disk 66 with the proximal end side of the annular protrusion 88 abutted against the internal shoulder 80 of the battery retainer by the battery spring 64 surrounding the body 86 of the battery pin 62 and biasing between the tube disk 66 and the opposite side of the annular protrusion 88.
  • the pair of diametrically opposed openings 84 in the battery retainer 60 are provided to receive a tool (not shown) such as a spanner wrench for tightening the battery retainer 60, battery pin 62, battery spring 64, tube disk 66 and spring contacts 68 into position.
  • a tool such as a spanner wrench for tightening the battery retainer 60, battery pin 62, battery spring 64, tube disk 66 and spring contacts 68 into position.
  • the battery retainer assembly together with the battery 32 loaded into the handle 12 and secured therein by the cap spring 48 and end cap 50 form the portion of the flashlight 10 of the present invention generally referred to as the battery pack assembly.
  • the proximal section 22 threadingly receives the head 14.
  • the head 14 is of copper plated brass.
  • the head 14 for the flashlight 10 of the present invention comprises a base portion 100 having exterior threads 102 that mate with the interior threads 24 of the proximal handle section 22 for attaching the head 14 to the handle 12.
  • An external, inwardly curved section 104 is between the base portion 100 and a mounting portion 106 having an annular channel 108 which receives an elastomeric O-ring 110.
  • the mounting portion 110 of head 14 is provided with three partially overlapping races 112.
  • the races 112 each begin at a position adjacent to a proximal open end 114 of the mounting portion 110 and they run towards the base portion 100 of the head 14 as they extend somewhat more than a third of the way around the circumference thereof.
  • a beginning portion of a first race adjacent to the proximal open end 114 overlaps the end of a second race 112 adjacent to the curved section 104 of head 14 while the end of the first race is overlapped by the beginning a third race.
  • the races 112 provide for twistingly mounting a cage 116 and sleeve 118 on the mounting portion 110 of head 14 such that as the cage 116 and sleeve 118 are twisted, they move axially along the flashlight 10, as will be described in detail hereinafter.
  • the interior of the mounting portion 110 of head 14 is provided with a first, cylindrically-shaped surface 120 that meets a second cylindrically-shaped surface 122 at an inner step 124.
  • the second cylindrical surface 122 forms into a bevel 126 meeting a shoulder 128 leading to a third, cylindrically-shaped surface 130 in the curved section 104 of the head.
  • Third cylindrical surface 130 leads to an outwardly tapering bevel 132 that meets a fourth, cylindrically-shaped surface 134 and a second bevel 136 in the base portion 100 of head 14.
  • a spacer 138 preferably of an acetal thermoplastic material, has a cylindrical outer surface 140 extending into a distal chamfer 142.
  • the cylindrical outer surface 140 and chamfer 142 of spacer 138 are received in a closely spaced relationship by the matching second internal cylindrical surface 122 and bevel 126 of the head member 14 with the chamfer 142 abutting the bevel 126.
  • the inner step 124 of the head 14 between the first cylindrical surface 120 and the second lesser diameter cylindrical surface 122 supports a contact spring 144 thereon.
  • the contact spring 144 is preferably of beryllium copper plated with silver.
  • a lamp holder 146 has a cylindrically-shaped outer surface 148 that is received in a closely spaced relationship with the third, internal cylindrical surface 130 of head member 14, directly opposite the inwardly curved section 104.
  • the lamp holder 146 is preferably of gold plated brass and has a first, inner cylindrical section 150 that meets at an inner step 152 with a second, inner cylindrical section 154 which in turn meets at a step 156 with an inner threaded section 158.
  • Threaded section 158 opens into a fourth, inner cylindrical section 160 that meets an outwardly tapering bevel 162 extending to a proximal end thereof.
  • a forward insulator 164 preferably of an acetal thermoplastic material, is received inside the lamp holder 146 with its end 166 abutting step 156 and its cylindrically-shaped outer surface 168 contacting the second cylindrical section 154.
  • Forward insulator 164 has a cylindrically-shaped through bore 170 of a first diameter that opens into an annular inlet portion 172 having a second diameter greater than that of bore 170.
  • a contact pin 174 comprises a large diameter disk 176 intermediate a forward shaft 178 and a rearward shaft 180 extending to a contact 182.
  • the contact pin 174 is preferably of gold plated brass and the forward shaft 178 is sized to be received in the through bore 170 of the forward insulator 164. With the forward insulator 164 received in the lamp holder 146, the disk 176 of contact pin 174 is positioned within the second, inner cylindrical section 154 of the lamp holder 146 adjacent to step 152.
  • a rear insulator 184 preferably of an acetal thermoplastic material, has a cylindrically-shaped outer surface 186 meeting opposed end faces 188 and 190.
  • a cylindrical through bore 192 communicates between the faces 188, 190 and is sized to fit over the rearward shaft 180 of the contact pin 174 to thereby lock the pin 174 inside the lamp holder 146 in conjunction with the forward insulator 164.
  • a lamp 194 is threaded into the inner threaded section 158 of the lamp holder 146.
  • a lamp 194 useful with the flashlight 10 of the present invention is commercially available from Boehm under model no. X02.88.044.
  • a reflector 196 preferably of silver plated beryllium copper, has a step 197 that serves as a seat for an end of the contact spring 144.
  • the contact spring 144 is captured in a biasing relationship between the reflector 196 and the inner step 124 of head 14.
  • the reflector 196 is preferably of gold plated brass.
  • a stainless steel contact spring 198 is received in an annular channel 200 in the base 202 of the reflector 196, and spring 198 helps to retain the reflector 196 in position in addition to serving as an electrical contact between the reflector 196 and the lamp holder 146.
  • a sleeve 204 preferably of gold plated brass, comprises an inner, cylindrical portion 206 having a first diameter meeting a second, larger diameter inner, cylindrical portion 208 at a step 210. A portion of the outer surface of sleeve 204 adjacent to the end of the second cylindrical portion 208 is threaded 212.
  • a cage 214 preferably of an acetal thermoplastic material, has a cylindrical outer surface with three openings 218 spaced equidistant around the perimeter of the cage 214.
  • the openings 218 form a plane normal to the longitudinal axis of the flashlight 10 and receive stainless steel balls 220.
  • Fig. 4A shows that with the head 14 threadingly connected to the proximal handle section 22 and with the sleeve 204 and cage 214 positioned so that each ball 220 is at the beginning of its race 112 adjacent to the proximal open end 114 of the mounting portion 106 of head 14, the contact 195 of lamp 194 contacts the forward shaft 178 of the contact pin 174 having its rearward shaft 180 contacting the proximal end 90 of the battery pin 62.
  • the opposite, distal end 226 (Figs. 3B and 4A) of the battery pin 62 is in a raised position, out of contact with the central, positive terminal 38 of battery 32.
  • the lamp 194 is energized by twisting or rotating the sleeve 204 with respect to the head 14 and handle 12. This movement causes the sleeve 204 and the captured cage 214 to move towards the handle 12 as the balls 220 travel along the races 112 towards their ends thereof. This movement causes the lamp holder 146, lamp 194, reflector 196, lens 222 and lens ring 224 to move towards the handle 12 against the biasing force of the contact spring 144 which in turn pushes the contact pin 174 and battery pin 62 towards the battery 32 against the biasing force of the battery spring 64 until the distal end 226 of the battery pin 62 contacts the central, positive terminal 38 of battery (as shown in dashed lines in Fig. 4A).
  • the electrical circuit is completed through the annular, negative contact ring 36, the spring contacts 68, the handle 12, the head 14, the lamp holder 146, the reflector spring 198 and reflector 196 contacting the casing of lamp 194. With the lamp 194 energized, light is directed out through the lens 222, for example to help illuminate a zone of interest during a medical examination or procedure.
  • the sleeve 204 and cage 214 move away from the handle 12 as the balls 220 travel along the races 112 towards their beginnings adjacent to the proximal open end 114 of the mounting portion 110 of head 14.
  • the contact spring 144 biases the lamp holder 146, lamp 194, reflector 196, lens 222 and lens ring 224 away from the handle 12 while the battery spring 64 biases the battery pin 62 out of contact with the central, positive battery terminal 38.
  • Table 1 lists the magnetic susceptibilities of the various materials used to construct the flashlight along with selected other materials.
  • brass is an alloy of copper and zinc.
  • Table 2 lists the magnetic susceptibilities of various relatively highly magnetic materials.
  • Tables 1 and 2 The data use to construct Tables 1 and 2 was obtained from a paper authored by John Schneck of General Electric Corporate Research and Development Center, Schenectady, New York 12309, entitled "The Role of Magnetic Susceptibility In Magnetic Resonance Imaging:Magnetic Field Compatibility of the First and Second Kinds". The disclosure of that paper is incorporated herein by reference.
  • the flashlight of the present invention is an instrument which is useful for pre and post clinical and surgical applications, especially in an environment proximate the strong magnetic field emitted by a magnetic resonance scanner.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Battery Mounting, Suspending (AREA)
  • Primary Cells (AREA)
EP98106642A 1997-04-11 1998-04-09 Lampe de poche à basse susceptibilité magnétique Withdrawn EP0870975A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US83733897A 1997-04-11 1997-04-11
US837338 1997-04-11

Publications (2)

Publication Number Publication Date
EP0870975A2 true EP0870975A2 (fr) 1998-10-14
EP0870975A3 EP0870975A3 (fr) 1999-09-15

Family

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Family Applications (1)

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EP98106642A Withdrawn EP0870975A3 (fr) 1997-04-11 1998-04-09 Lampe de poche à basse susceptibilité magnétique

Country Status (3)

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EP (1) EP0870975A3 (fr)
JP (1) JPH1196802A (fr)
AU (1) AU6076698A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989624A1 (fr) * 1998-09-21 2000-03-29 Wilson Greatbatch Ltd. Batterie secondaire au lithium fabriquée avec des matériaux à basse susceptibilité magnétique
EP0989623A1 (fr) * 1998-09-21 2000-03-29 Wilson Greatbatch Ltd. Pile électrochimique secondaire au lithium hermétiquement scellée

Citations (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US310004A (en) 1884-12-30 Edwabd weston
US485089A (en) 1892-10-25 Standard cell for electric batteries
US1067646A (en) 1912-04-12 1913-07-15 Albert J Downey Search-light for umbrella-handles.
US1877077A (en) 1930-06-12 1932-09-13 Vol U Meter Co Inc Inspection lamp
US2282979A (en) 1939-11-24 1942-05-12 Electric Storage Battery Co Counterelectromotive force cell
US2459702A (en) 1946-05-20 1949-01-18 Harry T Hipwell Flash lamp
US2651763A (en) 1947-12-03 1953-09-08 Henry Hyman Shock absorber assembly for portable electric flashlights
US2864880A (en) 1954-09-27 1958-12-16 Mallory & Co Inc P R Battery construction and cell therefor
US2982807A (en) 1957-10-08 1961-05-02 Electric Storage Battery Co Battery container and polarizing terminal means therefor
US3352715A (en) 1963-10-22 1967-11-14 Zaromb Solomon Battery comprising alternating layers of noble metal and salt-containing substance
US3673000A (en) 1969-05-01 1972-06-27 Leclanche Sa Antimagnetic alkaline miniature galvanic cell
US3890498A (en) 1971-12-16 1975-06-17 Sr Paul D Toth Flashlight device
US4053687A (en) 1975-10-17 1977-10-11 Saft-Societe Des Accumulateurs Fixes Et De Traction Electrochemical cell
US4203150A (en) 1977-10-18 1980-05-13 Shamlian Ralph B Rechargeable modular component light with quick-disconnect connection
US4237527A (en) 1978-10-16 1980-12-02 Breedlove Leon J Flashlight apparatus
US4264688A (en) 1979-08-13 1981-04-28 Catanzarite Vincent Owen Electrochemical cell
US4286311A (en) 1978-04-07 1981-08-25 Anthony Maglica Flashlight
US4318967A (en) 1979-12-13 1982-03-09 Leclanche' S.A. Long-life galvanic primary cell
US4595641A (en) 1985-05-21 1986-06-17 Cordis Corporation Battery compartment having battery polarity protection
US4607623A (en) 1984-11-08 1986-08-26 Jack Bauman Unitary insert support frame for the handle of an examining device
US4613926A (en) 1984-10-31 1986-09-23 General Electric Company Fiber optic illuminating assembly
US5104752A (en) 1990-10-15 1992-04-14 Allied-Signal, Inc. Dual, series/parallel battery cell connects
US5149598A (en) 1991-07-11 1992-09-22 Acr Electronics, Inc. Battery arrangement
US5173371A (en) 1991-03-11 1992-12-22 Eveready Battery Company, Inc. Battery to prevent cell reversal
US5194340A (en) 1990-10-05 1993-03-16 Asahi Kogaku Kogyo Kabushiki Kaisha Polarized battery terminal contact device
US5418087A (en) 1993-08-04 1995-05-23 Saft America, Inc. Planar metal gas cell
US5443924A (en) 1992-10-29 1995-08-22 Rayovac Corporation Discriminating charger and compatible battery
US5593222A (en) 1994-02-15 1997-01-14 Mag Instrument, Inc. Flashlight
US5601359A (en) 1995-05-25 1997-02-11 Streamlight, Inc. Flashlight having resilient sleeve

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
US5590951A (en) * 1994-12-21 1997-01-07 Laser Products Ltd. Switch-less flashlights

Patent Citations (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US310004A (en) 1884-12-30 Edwabd weston
US485089A (en) 1892-10-25 Standard cell for electric batteries
US1067646A (en) 1912-04-12 1913-07-15 Albert J Downey Search-light for umbrella-handles.
US1877077A (en) 1930-06-12 1932-09-13 Vol U Meter Co Inc Inspection lamp
US2282979A (en) 1939-11-24 1942-05-12 Electric Storage Battery Co Counterelectromotive force cell
US2459702A (en) 1946-05-20 1949-01-18 Harry T Hipwell Flash lamp
US2651763A (en) 1947-12-03 1953-09-08 Henry Hyman Shock absorber assembly for portable electric flashlights
US2864880A (en) 1954-09-27 1958-12-16 Mallory & Co Inc P R Battery construction and cell therefor
US2982807A (en) 1957-10-08 1961-05-02 Electric Storage Battery Co Battery container and polarizing terminal means therefor
US3352715A (en) 1963-10-22 1967-11-14 Zaromb Solomon Battery comprising alternating layers of noble metal and salt-containing substance
US3673000A (en) 1969-05-01 1972-06-27 Leclanche Sa Antimagnetic alkaline miniature galvanic cell
US3890498A (en) 1971-12-16 1975-06-17 Sr Paul D Toth Flashlight device
US4053687A (en) 1975-10-17 1977-10-11 Saft-Societe Des Accumulateurs Fixes Et De Traction Electrochemical cell
US4203150A (en) 1977-10-18 1980-05-13 Shamlian Ralph B Rechargeable modular component light with quick-disconnect connection
US4286311A (en) 1978-04-07 1981-08-25 Anthony Maglica Flashlight
US4237527A (en) 1978-10-16 1980-12-02 Breedlove Leon J Flashlight apparatus
US4264688A (en) 1979-08-13 1981-04-28 Catanzarite Vincent Owen Electrochemical cell
US4318967A (en) 1979-12-13 1982-03-09 Leclanche' S.A. Long-life galvanic primary cell
US4613926A (en) 1984-10-31 1986-09-23 General Electric Company Fiber optic illuminating assembly
US4607623A (en) 1984-11-08 1986-08-26 Jack Bauman Unitary insert support frame for the handle of an examining device
US4595641A (en) 1985-05-21 1986-06-17 Cordis Corporation Battery compartment having battery polarity protection
US5194340A (en) 1990-10-05 1993-03-16 Asahi Kogaku Kogyo Kabushiki Kaisha Polarized battery terminal contact device
US5104752A (en) 1990-10-15 1992-04-14 Allied-Signal, Inc. Dual, series/parallel battery cell connects
US5173371A (en) 1991-03-11 1992-12-22 Eveready Battery Company, Inc. Battery to prevent cell reversal
US5149598A (en) 1991-07-11 1992-09-22 Acr Electronics, Inc. Battery arrangement
US5443924A (en) 1992-10-29 1995-08-22 Rayovac Corporation Discriminating charger and compatible battery
US5418087A (en) 1993-08-04 1995-05-23 Saft America, Inc. Planar metal gas cell
US5593222A (en) 1994-02-15 1997-01-14 Mag Instrument, Inc. Flashlight
US5601359A (en) 1995-05-25 1997-02-11 Streamlight, Inc. Flashlight having resilient sleeve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JOHN SCHECK: "the role of magnetic susceptibility in magnetic resonance imaging: magnetic field compatibility of the first and second kinds", GENERAL ELECTRIC CORPORATE RESEARCH AND DEVELOPMENT CENTER, SCHENECTADY, NEW YORK 12309

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989624A1 (fr) * 1998-09-21 2000-03-29 Wilson Greatbatch Ltd. Batterie secondaire au lithium fabriquée avec des matériaux à basse susceptibilité magnétique
EP0989623A1 (fr) * 1998-09-21 2000-03-29 Wilson Greatbatch Ltd. Pile électrochimique secondaire au lithium hermétiquement scellée

Also Published As

Publication number Publication date
AU6076698A (en) 1998-10-15
EP0870975A3 (fr) 1999-09-15
JPH1196802A (ja) 1999-04-09

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