Flashlight

Abstract: A lighting assembly for use in a cigarette lighter shell (12). The lighting assembly comprises an insulative case (38) for housing a power supply, such as batteries (52,54), and conductors (40,42,44,46) for establishing an electrical circuit that includes the batteries (52,54), the conductors (40,42,44,46), a light bulb (48), and the cigarette lighter shell (12). A reflector (50) and lens (62') may be provided to focus and direct the beam generated by the bulb (48). A resilient portion of one of the conductors (46) is biased against a well (30) of the cigarette lighter shell (12) to close the electrical circuit. When a lid (18) of the cigarette lighter shell (12) is closed, the lid (18) engages an insulative tip (88) to remove the conductor from contact with the shell wall (30) and turn the flashlight off. The tip (88) is provided on an end of the conductor (46) and may be manually manipulated to remove the conductor (46) from contact with the shell wall (30) to open the electrical circuit and place the flashlight in an unlocked off position. A groove (90) may be provided in the case (38) to receive the tip (88) and maintain an open circuit to place the flashlight in a locked off position.

Description: The present invention relates generally to lamps or flashlights. Lamps and flashlights of different shapes and sizes and utilizing different on/off switches are well known. Miniature flashlights come in many sizes and shapes, however these flashlights are often too large or bulky or have shapes which are inconvenient for carrying. The outer casings or shells for these miniature flashlights are often complex from a manufacturing standpoint which adds to the cost of the flashlights. Finally, these miniature flashlights are typically not well suited for the rugged storage and carrying conditions to which they are often subjected. US 4644451 relates to a miniature flashlight in which the circuitry capable of illuminating the lamp is completed by squeezing the flashlight case which is flexible. US 2014266 describes a vanity case having a mirror and a lamp. After the case is opened, the lamp may be turned on by manipulation of a lever. On closing, a cam on the inner surface of the lid engages the lever to turn the lamp off. It is an object of this invention to provide an improved flashlight. This invention consist of a flashlight comprising: a case adapted for insertion into a shell, said case including: means for retaining a power supply; a light bulb secured to said case; a conductor having a first end portion disposed for establishing an electrical contact with the power supply and having a resilient second end portion; means for completing an electrical circuit to permit electricity to pass from said power supply through said light bulb and said conductor; and means for moving said second end portion of said conductor from a first position in which said conductor is removed from contact with said means for completing an electrical circuit to a second position in which said conductor is in contact with said means for completing an electrical circuit wherein the shell includes a lid movable between open and closed positions, and said means for moving said second end portion of said conductor from said first position to said second position is responsive to opening of said lid. Preferably, the shell is a cigarette lighter shell. One embodiment of the present invention features a lighting assembly adapted for insertion into a cigarette lighter shell. The lighting assembly includes an insulative case for housing a power supply such as batteries, and conductors for establishing an electrical circuit that includes the batteries, the conductors, a light bulb and the cigarette lighter shell. A resilient portion of one conductor is biased against a wall of the cigarette lighter shell to close the electrical circuit and place the flashlight in an on position. An insulative tip is provided on an end of the conductor and may be manually manipulated to remove the conductor from contact with the shell wall to open the electrical circuit and place the flashlight in an unlocked off position. A groove may also be provided in the insulative case to receive the tip and hold the conductor in a locked off position. When a lid of the cigarette lighter shell is closed, the lid engages the tip to remove the conductor from contact with the shell wall and turn the flashlight off. The invention will now be described, by way of example, with reference to the accompanying drawings, in which, FIG. 1 is an elevated cross-sectional view of a lighting assembly and shell of the present invention showing the lighting assembly removed from the shell; FIG. 2 is an elevated cross-sectional view of a flashlight of the present invention, showing the lighting assembly inserted into the shell and showing the flashlight in an on position; FIG. 3 is an elevated cross-sectional view of the flashlight of the present invention, showing the lighting assembly inserted into the shell and showing the flashlight in an off position; and FIG. 4 is an elevated, cross-sectional view of the flashlight of the present invention in a locked off position. FIG. 5 is an elevated cross-sectional view of an alternate embodiment of the flashlight of the present invention in an on position. In FIG. 1, the reference numeral 10 designates a lamp or flashlight incorporating features of the present invention. The flashlight 10 is comprised of a cigarette lighter shell or container 12 and a lighting assembly 14. The shell 12 has a base 16 and a lid 18, connected by a hinge 20. A bracket 22 is secured to an inner wall of the lid 18 for reasons to be described. The base 16 has a floor 24, a lip 26, a rear wall 28, a front wall 30, and two side walls. The lid 8 has a roof, a lip 32, a rear wall 34, a front wall 36, and two side walls. The lighting assembly 14 is adapted to be inserted into the shell 12 and comprises an insulative case 38 and conductors 40,42,44 and 46. A light bulb 48, a reflector 50, a power supply or batteries 52 and 54, a lever 56, a plunger 58, and a spring 60 may also be supplied. The lighting assembly 14 may also be provided with a lens 62' as shown in FIG. 5. The case 38 has a bottom wall 64, a rear wall 66, a front wall 68 and may have two side walls. An upper portion of the case 38 has apertures 70 and 72 for receiving and retaining electrodes 74 and 76 of the light bulb 48. An upper portion of the case 38 also extends about and above the light bulb 48 to secure the optional reflector 50 and lens 62 in place for focusing and directing a beam of light generated by the bulb 48. The lever 56, plunger 58, and spring 60 combination are secured within an aperture in the case 38 near the rear wall 66 of the case 38 and function to retain the lid 18 in the closed position. The lever 56 is so configured that, when the lid 18 is in the open position, the lever 56 is retained in the position shown in Figure 2 by the bias of spring 60. When the lid 18 is moved to the closed position, the lever 56 fits within the bracket 22 and the force of spring 60, acting through the plunger 58 and lever 56, biases the lid 18 to the closed position to retain it in that position. The lever 56, plunger 58, and spring 60 combination are well known to those of ordinary skill in the art and will therefore not be discussed in greater detail. The case 38 has apertures 78 and 80 for receiving and retaining batteries 52 and 54. A portion of the conductor 40 is disposed within the case 38 near the bottom wall 64 and extends into the aperture 78 for contacting an electrode of the battery 52. Another portion of the conductor 40 extends outwardly from the rear wall 66 of the case 38 to contact the rear wall 28 of the base 16 when the lighting assembly 14 is inserted into the base 16 of the shell 12. A portion of the conductor 42 is disposed within an upper portion of the case 38 and extends into the aperture 78 for contacting an electrode of the battery 52. The conductor 42 extends through the case so that another portion of the conductor 42 extends into the aperture 70 for contacting the electrode 74 of the bulb 48. The electrode 74 is connected to the filament of the bulb 48 which is in turn connected to the other electrode 76 of the bulb 48. A portion of the conductor 44 extends into the aperture 72 for contacting the electrode 76 of the bulb 48. The conductor 44 extends through an upper portion of the case 38 so that another portion of the conductor 44 extends into the aperture 80 for contacting an electrode of the battery 54. A portion of the conductor 46 is disposed in the case 38 near the bottom wall 64 and extends into the aperture 80 for contacting the electrode of the battery 54. A channel 82 having an inner wall 84 and an outer wall 86 is provided near the front wall 68 of the insulative case 38. A resilient portion of the conductor 46 extends within the channel 82 over substantially the entire length of the channel 82 at an acute angle to the inner wall 84. The acute angle formed is very small and is typically less than five degrees, even when a portion of the conductor 46 is biased against the front wall 30 of the shell 12 so that the flashlight is in the on position (FIG. 2). An insulative tip 88 is secured to an end portion of the conductor 46. For reasons to be described, an upper portion of the tip is sized to nest within a groove 90 when the tip 88 is pushed away from the front wall 68 of the case 38. A lower portion of the tip 88 has an upper surface which is angled away from the front wall 68 of the case 38 and the front wall 30 of the base 16 of the shell 12. A medial portion of the conductor 46 is bent to form a protrusion 92 which extends toward the front wall 68 of the case 38 and the front wall 30 of the base 16 of the shell 12. An aperture 94 in the front wall 68 of the case 38 permits the protruding portion 92 of the conductor 46 to contact and bias against the front wall 30 of the base 16 of the shell 12. Although the protrusion 92 depicted is semi-spherical, the protrusion 92 may take any number of shapes or may be formed by a knob or other protuberance extending outwardly from the conductor 46. Also, the groove 90 for nestingly engaging the tip 88 may be used regardless of whether a channel 82, protrusion 92, or aperture 94 are used. In an alternate embodiment depicted in FIG. 5, no channel 82, groove 90, or protrusion 92 are utilized. Instead, a resilient portion of the conductor 46' extends outwardly from the front wall 68' of the case 38' and alongside the front wall 68' of the case 38' over substantially its entire length. An insulative tip 88' is secured to an end portion of the conductor 46'. For reasons to be described, the tip 88' is disposed so that a top portion of the tip 88' is angled toward the front wall 68' of the insulative case 38' and away from the front wall 30' of the base 16' of the shell 12'. As shown in FIGS. 1 through 5, an aperture 96 may be provided to store an extra bulb 98 within the case 38. In operation, the lighting assembly 14 is inserted into the base 16 of the shell 12. A portion of the conductor 40 is placed in permanent contact with the rear wall 28 of the base 16 near the floor 24 of the base 16. When the lid 18 is in the open position (FIG. 2), protrusion 92 of the conductor 46 extends through the aperture 94 in the front wall 68 of the case 38 and is biased against the front wall 30 of the base 16. The base 16 of the shell 12 is composed of a conductive material, such as a metal, so that an electrical current may pass from the conductor 46 to the conductor 40 to complete an electrical circuit which includes the batteries 52 and 54, the bulb 48, the conductors 40, 42, 44, and 46, and the base 16 of the shell 12, thereby placing the flashlight in an on position. With the lid 18 in the closed position (FIG. 3), the lid 18 contacts an angled top portion of the tip 88, and the lip 32 of the lid 18 pushes the tip 88 away from the front wall 30 of the base 16 of the shell 12 to open the electrical circuit and place the flashlight in an unlocked off position. When the lid 18 is placed in the open position (FIGS. 2 and 4), the tip 88 may be manually pushed away from the front wall 30 of the base 16 of the shell 12 so that the protruding portion 92 of the conductor 46 is removed from contact with the front wall 30 of the base 16 of the shell 12 to open the electrical circuit and place the flashlight in an unlocked off position. Once in the unlocked off position, the tip 88 may also be pushed upwardly so that an upper portion of the tip 88 slides into and nests within the groove 90 to place the flashlight in a locked off position (FIG. 4) . In the locked off position, the electrical circuit will remain open regardless of whether the lid 18 is in the open or closed positions. An alternate embodiment depicted in FIG. 5 does not utilize a channel 82, a protrusion 92, a groove 90, or an aperture 94 in the front wall 68 of the case 38 and does not provide a locked off position. Nonetheless, the tip 88' may still be manually manipulated to place the flashlight 10' in an unlocked off position or an on position. In the alternate embodiment, the lid 18' also engages the tip 88' when the lid 18' is in the closed position to remove the conductor 46' from contact with the front wall 30' of the base 16' of the shell 12' to open the electrical circuit and place the flashlight in an unlocked off position. Several advantages result from the foregoing combination. For example, the present invention discloses a lighting assembly 14 which may be inserted into a cigaret lighter shell 12. The flashlight 10 has a size and shape which is convenient to carry and use, and the cigaret lighter shell 12 makes the flashlight 10 well suited for rugged storage and carrying conditions. The manually operable tip 88 permits the flashlight to be turned on or off even when the lid 18 is open, and the locked off position permits the flashlight to remain off even when the lid 18 is open. It is understood that variations may be made in the present flashlight without departing from the scope of the present invention. For example, the base 16 of the shell 12 need not be made of a conductive material as long as an electrically conductive path is provided across the base 16 between the conductor 46 and the conductor 40. Additionally, the reflector 50 and lens 62' may be omitted or may be removable so that the bulb 48 provides an unfocused, substantially spherical source of light. The lighting assembly of the present invention may also be utilized with shells other than cigaret lighter shells. Further, the flashlight may use one, two, or more batteries depending upon the size and shape of the container or shell utilized. Further still, bulbs other than the bi-pin bulb 48 depicted may be used. As illustrated by the embodiment depicted in FIG. 5, the channel 82, groove 90, protrusion 92, and aperture 94 in the front wall 68 of the case 38 are optional, and an unlocked off position need not be provided. A latitude of modification, change and substitution is intended in the foregoing disclosure and in some instances some features of the invention will be employed without a corresponding use of other features.

Claims: A flashlight comprising: a case (38) adapted for inserting into a shell (12), said case including: means for retaining a power supply (52 and 54); a light bulb (48) secured to said case; a conductor having a first end portion disposed for establishing an electrical contact with the power supply and having a resilient second end portion; means for completing an electrical circuity to permit electricity to pass from said power supply through said light bulb and said conductor; and means for moving said second end portion of said conductor from a first position in which said conductor is removed from contact with said means for completing an electrical circuit to a second position in which said conductor is in contact with said means for completing an electrical circuit characterised in that the shell includes a lid (18) movable between open and closed positions, and said means for moving said second end portion of said conductor from said first position to said second position is responsive to opening of said lid. The flashlight of Claim 1, wherein said shell (12) comprises a base (16) and said lid (18), said case (38) is an insulative case, said shell is a metal shell and said conductor in said second position contacts said base to close said electrical circuit and to place said flashlight in an on position. The flashlight of Claim 2, further including an insulated tip (88) secured to said second end of said conductor and disposed so that, when said lid (18) is in said open position, said tip allows said conductor to contact and bias against said base to close said electrical circuit, and when said lid is in said closed position, said tip engages said lid to move said conductor to said first position. The flashlight of Claim 3 wherein said tip (88) extends above the top of said base to permit said conductor to be manually moved between said first and second positions when said lid is in said open position. The flashlight of Claim 3 of Claim 4 wherein said case has a groove (90) adapted to nestingly engage said tip (88) to retain said conductor in a third, locked off, position in which said conductor is removed from contact with said base. The flashlight of any one of Claims 2 to 5 further including a channel (82) extending through said case (38) near a front wall (68) of said case, said front wall having an aperture (94) extending through an upper portion of said front wall to said channel; said second end portion of said conductor extending upwardly through said channel and having a medial, protruding portion which protrudes toward said front wall of said case, said protruding portion registering with said aperture of said front wall or said case to permit said protruding portion to pass through said front wall aperture to contact with said shell when said case is inserted into said shell. The flashlight of any one of Claims 1 to 4 further comprising: a lever (56) hingedly secured to an upper portion of said case; and a bracket rigidly secured to an inner wall of said lid; said lever being adapted to slidably engage said bracket to permit said lid to be moved between said open and said closed positions, and said lever being configured to fit within said bracket when said lid is in said closed position to reduce movement of said case relative to said container. The flashlight of any preceding claim wherein said case has an aperture for receiving and storing a spare light bulb (98). The flashlight of any preceding claim wherein said shell is a cigarette lighter shell.

Inventors: MURRAY DONALD M, STORY MICHAEL C, MURRAY, DONALD M., STORY, MICHAEL C.
Applicants: ZIPPO MFG CO, ZIPPO MANUFACTURING COMPANY
Application year: 1993
Main classification: F21L7
IPC codes: F21V33, F23Q13, F21L4