Patent Application
20050045464
The present invention is generally related to toggle switches. The present invention is also related to switches and components utilized in high-performance devices, such as military and commercial aircraft. The present invention is additionally related to actuator components utilized in switching mechanism.
A toggle switch is a switch in which a projecting lever with a spring is used to open or to close an electric circuit. Toggle switches of various types have long been utilized to control power in domestic, commercial, industrial, and military applications for operating various electrical devices and equipment.
Known toggle switches typically are manufactured with a housing that contains electrical contacts and is fitted with a manually operable handle to switch power to externally mounted terminals. In one common form of a toggle switch, the handle has a cam surface internal to the housing that actuates a metallic leaf spring which in turn makes or breaks electrical conductivity with the contacts. Common toggle switches are standardized in terms of their mounting configurations such that they can readily be installed in wall-mounted electrical boxes, for example, with only the use of two screws. Typically, screw terminals are positioned on the sides of the switch housing such that connection can be easily made to electrical wires of suitable size to deliver power to electrical devices or equipment.
Toggle switches typically provide a manually accessible member which has metastability in a first position and a second position. For example, these positions may represent “ON” and “OFF”. Some situations provide a substantial penalty for accidental actuation. For example, during repair or installation, accidental actuation may result in electrocution or shock. Therefore, where a worker is not in the immediate vicinity of a switch and is in the process of installation, repair or maintenance, often a lock or flag is placed to alert others that the switch should not be reset or to prevent resetting without significant efforts.
Situations also arise when it is necessary not only to prevent accidental actuation, but to actually maintain the toggle switch in an actuated position. An example of this type of situation is inherent in many high-gravity military applications, such as, for example, in high-performance military aircraft. The United States Department of the Navy, for example, requires the use of a momentary switch in F-16 fighter aircraft, which is located near the pilot's leg and must be held manually during tactical maneuvers.
Such a switch can be utilized to invert the flight controls while performing combat maneuvers. Problems with such a momentary switch can occur when a pilot pulls a high “G-force” maneuver and his or her flight suit begins to inflate to force blood in his or her body to prevent a blackout condition. When this situation occurs, the pilot has a difficult time holding the switch in the “ON” position, causing him to become disoriented while viewing the flight control panel.
A need thus exists for an improved toggle switch, which can be adapted for use in such high-performance applications, and which permits a pilot to maintain actuation of the toggle switch during high “G-force” maneuvers.
The following summary of the invention is provided to facilitate an understanding of some of the innovative features unique to the present invention and is not intended to be a full description. A full appreciation of the various aspects of the invention can be gained by taking the entire specification, claims, drawings, and abstract as a whole.
It is, therefore, one aspect of the present invention to provide an improved toggle switch.
It is another aspect of the present invention to provide improved switching components utilized in high-performance devices, such as military and commercial aircraft.
The aforementioned aspects of the invention and other objectives and advantages can now be achieved as described herein. A toggle switch apparatus is disclosed, which includes a toggle mechanism and a plurality of basic switches maintained within a tubular housing. An actuator is associated with at least one spring which together can serve to actuate the plurality of basic switches. A lead wire termination assembly can also be configured within the tubular housing.
The lead wire termination assembly comprises a plurality of lead wires attached to a plurality of pin contacts that exit through a cover of the tubular housing, thereby permitting the toggle switch apparatus to be actuated manually in a maintained position during high gravity conditions. The tubular housing can be configured as a sealed metal tube. A header can also be sealed into the tubular housing utilizing a glass-to-metal seal. The cover itself may be configured as a metal cover and the plurality of basic switches can comprise at least six basic switches, which are aligned in a row within the tubular housing.
The accompanying figures, in which like reference numerals refer to identical or functionally-similar elements throughout the separate views and which are incorporated in and form a part of the specification, further illustrate the present invention and, together with the detailed description of the invention, serve to explain the principles of the present invention.
The particular values and configurations discussed in these non-limiting examples can be varied and are cited merely to illustrate at least one embodiment of the present invention and are not intended to limit the scope of the invention.
Toggle switch apparatus 100 generally includes a toggle mechanism 105 that includes a toggle 102 that is connected to a spring 109 which is associated with an actuator 111. Toggle mechanism 105 is also associated with a plurality of basic switches 114, 116, 118, 120, 122, and 124. Basic switches 114-124 are each surrounded respectively by insulators 126, 128, 130, 132, 134, and 136 and are located within a tubular housing 110. As indicated in
A plurality of “basic” switches 138, 140, 142, 144, 146 and 148 are also provided, which can be configured as miniature environmental-sealed and/or miniature hermetically sealed basic switches. Both types of enclosed basic switches can utilize standard SM/UM/SX/UX components encased within a corrosion resistant aluminum housing to seal the precision switch contacts from contamination. Alternatively, standard SM/UM/SX/UX components can be utilized without such a metal housing, if the design implementation does not call out the need for environmental sealing.
Note that the term “basic switch” or simply “basic” as utilized herein generally refers to a self-contained switching unit. Such a switching unit (i.e., a basic switch) can be utilized alone or in a gang-mounted configuration built into assemblies thereof or enclosed within a metal housing. A tube portion 149 can be configured as a metal tube to pinch-off seal a hermetic seal thereof. Metal header pins 150,152,154 are also generally attached to a header 155 with a glass to metal seal that allows the basic switch pins to reside for electrical connection to the bottom side 157 of the header 155. Additionally, a metal guide profile 109 can maintains the toggle 102 in either direction.
A ball bearing 506 and a spring 504 can be configured to apply force to a switch component 508 located within toggle 102, which helps in maintaining the position of toggle 102 via a spring force/profile thereof. Ball bearing 508 can be configured with a metal bracket that is utilized to gang mount the basic switches 138, 140, 142, 144, 146, 148. Ball bearing 508 and ball bearing 520 comprise the same component. Reference numerals are only utilized to indicate opposing sides of the same component. A metal-to-metal joint 510 can also be provided which is welded together to provide a hermetic seal. Additionally, a metal pin 512 can be utilized to actuate a lever associated with the gang of switches.
A metal toggle housing chamber 514 can also be provided as a chamber lead-in for a threaded nut 516. Note that the threaded nut 516 can be configured as a 15/32-32 NS threaded nut. A star washer 518 can also be provided as a star washer to help prevent the washer 518 from backing off. Additionally, a roll pin 542 can be utilized to retain actuator 111 (i.e., an actuator plate). Note that component 544 is similar to ball bearing 508.
A coil spring 546 can also be provided to help lift the actuator plate (i.e., actuator 111) to prevent a false actuation. In
The embodiments and examples set forth herein are presented to best explain the present invention and its practical application and to thereby enable those skilled in the art to make and utilize the invention. Those skilled in the art, however, will recognize that the foregoing description and examples have been presented for the purpose of illustration and example only. Other variations and modifications of the present invention will be apparent to those of skill in the art, and it is the intent of the appended claims that such variations and modifications be covered.
The description as set forth is not intended to be exhaustive or to limit the scope of the invention. Many modifications and variations are possible in light of the above teaching without departing from the scope of the following claims. It is contemplated that the use of the present invention can involve components having different characteristics. It is intended that the scope of the present invention be defined by the claims appended hereto, giving full cognizance to equivalents in all respects.
