The disclosed embodiments relate generally to the field of fire suppression. More specifically, the disclosed embodiments relate to the field of electrical connections made to fire suppression devices aircraft.
U.S. Pat. No. 6,910,902 issued to Osada et al. describes a shunt for a squib having a securing mechanism. U.S. Pat. No. 5,314,345 issued to Cahaly et al. describes an electrical connection system including a squibb receiving socket designed to accommodate the terminal pins of the squibb. The publication also discloses a shunting element that short circuits the pins before a female connector on the electrical system is connected. U.S. Pat. No. 6,398,590 issued to Banas et al. discloses an alternative system for connecting squibb contacts with a firing system that does not allow for terminal confusion. U.S. Pat. No. 6,203,342 issued to Gauker et al. discloses an elaborate electrical squibb connection system utilizing a central pin and a ground plate.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. Other aspects and advantages will be apparent from the following detailed description of the embodiments and the accompanying drawing figures.
In some embodiments, the techniques described herein relate to a system including: an adapter for receiving an igniter, the igniter having a first post for accommodating a first electrical connection, and a second post for accommodating a second electrical connection, the second electrical connection having a polarity opposite the first electrical connection; the adapter being configured to at least partially conceal the second post; and a bus bar being electrically connectable to the second post on one side and extending through and out from the adapter to establish an auxiliary post using an auxiliary connector, the auxiliary post being a new electrical connection.
In some embodiments, the techniques described herein relate to a system wherein the first post and second post have the same size and the auxiliary post has a different size.
In some embodiments, the techniques described herein relate to a system wherein the first post and second post have the same diameter, and the auxiliary post has a different diameter.
In some embodiments, the techniques described herein relate to a system wherein the adapter includes a shell securable onto a cap.
In some embodiments, the techniques described herein relate to a system wherein the shell is made to be securable onto the cap by a snap fit.
In some embodiments, the techniques described herein relate to a system wherein the shell and cap are both substantially cylindrical and the shell includes a cutout and a first circumferential slot, the cutout being positioned such that the adapter shell does not intersect the first post and the first circumferential slot being on an opposite side of the shell from the cutout, the first circumferential slot allowing for passage of the bus bar from a connection to the second post to reach the auxiliary post outside of the adapter.
In some embodiments, the techniques described herein relate to a system including: an inwardly extending ledge at a bottom of the cap, the inwardly extending ledge configured to support a washer the washer having a hex body portion; an inside edge of the inwardly extending ledge defining an opening, the hex body portion of the washer extending down through the opening and enabling rotation of the washer by a tool.
In some embodiments, the techniques described herein relate to a system wherein the washer has an internal set of threads configured to accept an external set of threads on the second post.
In some embodiments, the techniques described herein relate to a system wherein a second circumferential slot in the cap is configured to align with the first circumferential slot in the shell when the adapter cap is snap fit over the adapter shell, an alignment of the first and second circumferential slots allowing passage of the bus bar from the inside of the adapter to the outside of the adapter.
In some embodiments, the techniques described herein relate to a system wherein the bus bar has a large substantially circular portion and a more narrow smaller portion, the large substantially circular portion being configured to be held inside the adapter, and the more narrow smaller portion being configured to extend outside of the adapter to the auxiliary post.
In some embodiments, the techniques described herein relate to a system wherein the large substantially circular portion includes a first hole and the more narrow smaller portion includes a second hole wherein the first hole is configured to receive the second post therethrough, and the second hole is configured to receive the auxiliary post therethrough.
In some embodiments, the techniques described herein relate to a system wherein the first post, auxiliary post, bus bar, and the washer are fabricated from conductive materials.
In some embodiments, the techniques described herein relate to an adapter wherein the adapter cap and the adapter shell are fabricated from an Ultem material.
In some embodiments, the techniques described herein relate to a method including: configuring a shell to receive a conductive element; configuring a conductive element to have first and second ends; configuring the first end to be received and secured into a bottom interior space of the shell; configuring the shell to have an aperture allowing the second end of the conductive element to pass through and be exposed outside of the shell to establish an auxiliary electrical connection; including an igniter in the shell; and concealing an electrical connector on the igniter using the shell and a lower cap element secured onto a bottom of the shell.
In some embodiments, the techniques described herein relate to a method including: establishing a new electrical connection on an auxiliary post having a size different than one or more other electrical connection members.
In some embodiments, the techniques described herein relate to a method including: configuring the lower cap element to snappingly receive and securely hold the bottom of the shell; and establishing a lateral opening in a lower portion of the lower cap element, the lateral opening allowing for the passage through and out of the second end of the conductive element upon a receipt of the shell into the lower cap element.
In some embodiments, the techniques described herein relate to a method including: forming one or more of the shell or lower cap element using 3D printing techniques.
In some embodiments, the techniques described herein relate to a method including: locating a threaded rotatable element in the lower cap element: accomplishing the concealing step using the threaded rotatable element.
In some embodiments, the techniques described herein relate to a system including: an adapter for receiving an actuating device, the actuating device configured to receive a first electrical connection and a second electrical connection; the adapter including a bus bar configured electrically couple the second electrical connection and an auxiliary electrical connection; the adapter being configured to at least partially conceal the second electrical connection; the auxiliary electrical connection having a first diameter and the second electrical connection having a second diameter.
In some embodiments, the techniques described herein relate to a system wherein the actuating device is an igniter a first electrical connector extending laterally from an igniter body and the second electrical connection is a second electrical connector which extends downwardly from the igniter body.
Illustrative embodiments are described in detail below with reference to the attached drawing figures, which are incorporated by reference herein and wherein:
The drawing figures do not limit the invention to the specific embodiments disclosed and described herein. The drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the invention.
The following detailed description references the accompanying drawings that illustrate specific embodiments in which the invention can be practiced. The embodiments are intended to describe aspects of the invention in sufficient detail to enable those skilled in the art to practice the invention. Other embodiments can be utilized and changes can be made without departing from the scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense. The scope of the invention is defined only by the appended claims, along with the full scope of equivalents to which such claims are entitled.
In this description, references to “one embodiment,” “an embodiment,” or “embodiments” mean that the feature or features being referred to are included in at least one embodiment of the technology. Separate references to “one embodiment,” “an embodiment,” or “embodiments” in this description do not necessarily refer to the same embodiment and are also not mutually exclusive unless so stated and/or except as will be readily apparent to those skilled in the art from the description. For example, a feature, structure, act, etc. described in one embodiment may also be included in other embodiments but is not necessarily included. Thus, the technology can include a variety of combinations and/or integrations of the embodiments described herein.
Embodiments provide systems and a method for making an electrical connection to a pressurized fire suppression bottle system on aircraft.
The disclosed arrangement provides an adapter system for the usage of a fire bottle suppression adaptor. This adapter eliminates the potential of miswiring fire bottle cartridges which have commonly sized power and ground studs. For the fire extinguishing system to deploy, a cartridge squib must receive an electrical charge to puncture the bottle to emit the fire suppression agent. If the positive and negative wires are accidentally switched on the cartridge studs (as can happen when the studs are the same size as in conventional arrangements), the cartridge squib will not fire. This is a serious safety concern affecting the reliability of the aircraft. The potential for miswiring is high in current arrangements due to the rate at which cartridges and bottles must be serviced and/or replaced during the lifecycle of an aircraft. Each time the wires are disconnected and reconnected, the potential for switching the positive and negative (ground) wires is present.
The disclosed embodiments include an adapter device which eliminates the potential for miswiring by creating an electrical load pathway allowing the center stud of a fire bottle cartridge to be resized for adaptor attachment purposes. For example, with reference to adapter system 100 shown in
The term “post” as used herein should not be considered to any other configuration other than of a device that extends to enable a connection of some sort. The term should not be considered to limit a device to a particular shape, cross sectional, or an elongated profile.
Below the hexagonal body 112, extending in the opposite direction of the threaded upper end 108, a cylindrical portion 120 connects to a lower electrical connector 122 comprising the threaded positive connection in embodiments. The lower electrical connector 122, which is ordinarily directly received by a reciprocating connector to complete an electrical connection, will be electrically sealed off. More specifically, the implementation of an adapter shell 136 (
As a preliminary, squib 106 is presumed to already be installed on the aircraft. In normal operation, the squib 106, upon receiving electrical current, will detonate, puncturing the fire bottle 102 diaphragm and triggering release of the suppression agent from the fire bottle 102. The squib 106 may be an igniter body functioning as some type of igniter.
An adapter shell 136 is shown in
Shell 136 further includes a lateral cutout 138. In embodiments, cutout 138 extends downward as a half-circle made into the cylindrical body of the shell 136. More specifically, the cutout 138 extends from a top edge 139 downwards towards the lower edge 143 of the adapter shell 136. A lower circumferential slot 158 (see
The adapter cap 150 shown in
The adapter cap 150, referring to
Also cutout from the cylindrical shell 152 is a circumferential slot 154 positioned in between the upper edge 149 and the lower edge 151 of the cap 150. The slot 154 allows for bus bar 124 insertion while the circular inwardly extending ledge 156 is necessary to hold a washer nut 142 in place. The adapter cap 150 and inwardly extending ledge 156 substantially hold the washer nut 142 in place.
The washer nut 142 shown in
Hardware 161 as shown in
A method is also disclosed for assembling the adapter system 100 for use in a fire bottle arrangement.
In a first step shown in
In a next step, shown in
In a next step shown in
In a next step, the squib 106 is inserted and secured into the adapter shell 136.
In a next step, auxiliary electrical connection bolt 159 is installed and passed through the circular hole 128 of the smaller portion 126 of the bus bar 124, as shown in
In a next step, wire connector 162 (see
When commanded, electrical current 166 (with the correct polarity) may be supplied to the bolt 159 which travels through the adapter system 100 and actuates the squib 106, triggering mechanisms to puncture the fire bottle 102 diaphragm to trigger release of fire suppression agent within the fire bottle 102. In embodiments, a pyrotechnic plug 168 may be actuated by the squib 106 to release and puncture the fire bottle 102 so fire suppression agent may be released.
The auxiliary bolt 159 inserted through the bus bar 124 serves as the second extending post and is sized to be one size smaller in diameter than the diametrically equal first extending post 114 and the lower electrical connector 122 on the squib 106. The size difference established by the bus bar 124, connected bolt 159, and the first extending post 114 prevents a user from incorrectly connecting the diametrically different second wire connector 162 and first wire connector 164. The difference in size will prevent an improper electrical connection because coupling between the first wire connector 164 and the auxiliary bolt 159 (i.e. second extending post) and the second wire connector 162 and the first extending post 114 is not allowed. The adapter system 100 makes the lower electrical connector 122 inaccessible and coverts the lower electrical connector 122 to a smaller terminal size by creating a second extending post using the bus bar 124 and the bolt 159. The converted terminal size of the bolt 159 allows the second extending post (i.e. the bolt 159) to have a different diameter than the first extending post 114 which allows for the diametrically different wire connectors 162 and 164 to only be installed in one way and substantially prevents improper connection from occurring.
Many different arrangements of the various components depicted, as well as components not shown, are possible without departing from the spirit and scope of what is claimed herein. Embodiments have been described with the intent to be illustrative rather than restrictive. Alternative embodiments will become apparent to those skilled in the art that do not depart from what is disclosed. A skilled artisan may develop alternative means of implementing the aforementioned improvements without departing from what is claimed.
It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations and are contemplated within the scope of the claims. Not all steps listed in the various figures need be carried out in the specific order described.
This application claims the benefit of U.S. Provisional Patent No. 63/384,460 filed on Nov. 21, 2022, the entire contents of which are herein incorporated by reference.
Number | Date | Country | |
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63384460 | Nov 2022 | US |