Abstract:
Swivel actuating pressure switching devices and methods are described herein that include a shorting member that translates and rotates into contact with one or more terminals in response to the application of a specified pressure to a piston included in the switch. The rotation of the shorting member with respect to the one or more terminals can be controlled by a receptacle that can include flutes, which guide the rotational movement of the shorting member in response to fluid pressure that causes the translation of the piston.

Description:
RELATED APPLICATIONS 
       [0001]    This application claims priority to U.S. Provisional Patent Application No. 61/972,928, entitled “SWIVEL ACTUATING PRESSURE SWITCH,” filed on Mar. 31, 2014, which is incorporated herein by reference in its entirety. 
     
    
     TECHNICAL FIELD 
       [0002]    Various embodiments described herein relate to apparatus, systems, and methods associated with actuating a pressure sensing switch. 
       BACKGROUND 
       [0003]    Systems incorporating the use of various fluids under pressure are used in a variety of applications such as personal transportation vehicles, commercial shipping vehicles, construction equipment, lawn care equipment, etc. Many of these applications use pressure sensing switches to ensure proper performance and safety of the pressurized fluid systems. Pressure switches can have various characteristics making them more or less suitable for a desired application. Some characteristics affecting the performance of a pressure switch include the switches life cycle capacity, current carrying capacity, corrosion resistance, crash resistance, and the hysteresis of the switch. Improved pressure switch configurations and methods are desired to provide enhanced characteristics to improve the performance, reliability, and safety. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0004]    In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. Like numerals having different letter suffixes may represent different instances of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed in the present document. 
           [0005]      FIG. 1  shows a system incorporating one or more swivel actuating pressure switch devices according to an embodiment of the invention. 
           [0006]      FIG. 2  shows an exploded view of the swivel actuating pressure switch device according to an embodiment of the invention. 
           [0007]      FIG. 3  shows a cross section view of the swivel actuating pressure switch device from  FIG. 2 , according to an embodiment of the invention. 
           [0008]      FIG. 4  shows a first location of a shorting member with respect to one or more terminals according to an embodiment of the invention. 
           [0009]      FIG. 5  shows a second location of a shorting member with respect to one or more terminals according to an embodiment of the invention. 
           [0010]      FIG. 6  shows a normally open configuration of the switch according to an embodiment of the invention. 
           [0011]      FIG. 7  shows a normally closed configuration of the switch according to an embodiment of the invention. 
           [0012]      FIG. 8  shows a configuration of the switch that senses a pressure differential between a first pressure and a second pressure according to an embodiment of the invention. 
           [0013]      FIG. 9  shows a configuration of the switch used in conjunction with a wax motor according to an embodiment of the invention. 
           [0014]      FIG. 10  shows an example method of using the switch according to an embodiment of the invention. 
           [0015]      FIG. 11  shows a configuration of a switch that includes an over pressure device according to an embodiment of the invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0016]    In the following detailed description of a pressure switch, such as a swivel actuating pressure switch, reference is made to the accompanying drawings that form a part hereof and in which are shown, by way of illustration, specific embodiments in which the swivel actuating pressure switch may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. Other embodiments may be utilized and structural, logical, and electrical changes may be made. 
         [0017]    The swivel actuating pressure switch described herein provides a novel configuration and method for completing or interrupting an electrical circuit in response to the application of a predetermined pressure to the inlet of the switch. Many benefits exist to the various examples of the switch described below. Some of the advantages include, but are not limited to, a switch that includes a modular design that can offer a wide-range of applications. The individual components of the switch can be configurable in a manner such that the same or similar components can be used regardless of the application required. This modular design can reduce the cost and complexity of the switch. Another advantage includes the actuation mechanism of the switch, which allows the switch to transition from a closed to an open circuit state with low hysteresis in response to pressure fluctuations. Further advantages of the actuation mechanism can include terminals, contacts, and other shorting means that can be configured to achieve high current and pressure capacity, long life cycles, resistance to wear and corrosion, and resistance to vibration. The actuation pressure of the switch can be easily adjusted and in some configurations can be adjusted while the switch is in operation (e.g., when pressure is applied to the piston of the switch). 
         [0018]      FIG. 1  shows a swivel actuating pressure switch  100  incorporated into a fluid pressure system  102  according to an embodiment of the invention. The fluid pressure system  102  may include, but is not limited to a hydraulic system, a pneumatic system, an internal combustion engine, an air brake system, a hydraulic brake system, or other system that includes fluid or gas under pressure. Pressure as described herein can refer to positive pressure, negative pressure, or atmospheric pressure. Likewise, differences in pressure as described can refer to increases or decreases in pressure including changes in pressure from positive to negative and vice versa. The switch  100  can be configured to withstand fluid pressure up to 3500 psi from the fluid pressure system  102 . 
         [0019]    The pressure switch  100  can connect to a manifold  112 . The switch  100  can be sealed to the pressure manifold  112 , such as to prevent pressure leakage, such as leakage that can reduce the pressure exposed to at least one inlet of the switch  100 . The manifold  112  can be an interface between the pressure switch  100  and the fluid pressure system  102 . The manifold  112  can include a first port  108 , such as a port that introduces fluid system pressure to an inlet of the switch  100 . In some examples, the manifold  112  can have a second port, such as to use the switch  100  to sense a pressure differential between multiple ports (e.g., as shown in more detail in  FIG. 8 ). Additionally or alternatively, the manifold  112  can be configured to include more than two ports. 
         [0020]    The fluid pressure system  102  can include at least one fluid. In some examples a fluid can be gasoline, power steering fluid, oil, hydraulic fluid, air, oxygen, hydrogen, nitrogen, biological fluids, or other. 
         [0021]    The pressure switch  100  can also be connected to an electrical system  114 . In some examples the connection to the electrical system  114  can include a wired connection, a wireless connection, or other form of connection capable of transmitting a signal carried through the switch  100 . 
         [0022]      FIG. 2  shows an exploded view of the swivel actuating pressure switch  100  according to an embodiment of the invention. The swivel actuating pressure switch  100  can include a connector body  104 . The connector body  104  can be configured to capture one or more terminals  204  supported therein. The pressure switch  100  can further include a receptacle  202 , a spring  206 , a spring plate  208  with a shorting member  214  attached thereto, a housing  106 , an O-ring  216 , and a piston  212  with one or more u-seals  210 A,  210 B positioned thereon. A person of ordinary skill in the art will appreciate, after seeing this disclosure, that some features of the switch described below can be integrated with or separated from other features or components to achieve the same function or structure. In an example, the housing  106  can be integrated with the manifold  112  to form a single component; the shorting member  214  and the spring plate  208  could be formed as one piece; or the connector body  104  can be integrated with the connector that mates thereto, such as to form a single component. 
         [0023]      FIG. 3  shows a cross-section view of the swivel actuating pressure switch  100  according to an embodiment of the invention. 
         [0024]    The swivel actuating pressure switch  100  can include a connector body  104 . The connector body  104  can include a first end configured as a connector interface  304 . The connector interface  304  can engage with one or more electrical connectors for transmitting signals from the pressure switch  100 . One of ordinary skill in the art will appreciate, after seeing this disclosure, that connector interface  304  can be configured with any number and combination of connector interface styles, such as non-locking, snap-fit, bayonet, cannon, threaded, or other connection style. In an example, the exterior surface of the connector body  104  can be configured with an engagement feature, such as a snap-fit tab, snap-fit arm, bayonet lug, threads or other engagement features. The connector interface  304  can include one or more terminal configurations, such as in-line, circular, multi-row, or other configuration. In one or more examples, the connector interface  304  can be a sealed connector interface. 
         [0025]    The connector body  104  can include at least one terminal  204  supported therein. The one or more terminals  204  can be a pin-type terminal, a socket terminal, a spring contact, a spring loaded pin, or other type of terminal. The ends of the terminal  204  can be rounded, such as to aid in the assembly of the switch  100  or with the mating of a connector. The one or more terminals  204  can be supported within the connector body  104  by any number of means, such as press-fit into a passage in the connector body  104 , insert molded into the connector body  104 , or glued into the connector body  104 . In an example, the one or more terminals  204  can be sealed to the connector body  104 . The one or more terminals  204  can be an electrically conductive material, such as copper, phosphor bronze, or stainless steel. The terminal  204  can be plated with an additional material to increase conductivity, reduce wear, improve the corrosion resistance, or provide another benefit. Such plating can include any one of the following materials individually or in combination: nickel, silver, gold, or other material known to improve the characteristics of the electrical terminal  204 . 
         [0026]    The connector body  104  can include one or more alignment features to key the orientation of the connector interface  104  to a mating connector. The alignment feature can be a rib, slot, groove, or any other type of keying feature on the connector body  104 . In an example, the connector body can include a vent. The vent can provide pressure relief, such as to restore the internal pressure of the switch to atmospheric pressure or to provide atmospheric pressure to a piston surface. Additionally or alternatively, the vent can be used as a viewing window, such as for viewing the position of the shorting member  214  with respect to the one or more terminals  204 . For sealed versions of the switch  100 , the vent can be excluded. 
         [0027]    The material of the connector body  104  can be any material capable of handling the pressure and structural requirements of the switch  100 . Some examples of the material can include metal or plastic, such as aluminum, zinc alloy, stainless steel, ABS, glass filled polyamide, or other material. In an example, the material of the connector body  104  can be transparent. 
         [0028]    A second end of the connector body  104  can include one or more fastening features to fasten the connector body  104  to a housing  106 . Some examples of fastening features can include threads, energy directors for ultrasonic welding, channels for adhesive, or other features. 
         [0029]    The switch  100  can include a housing  106 . A first end of housing  106  can provide an interface to the manifold  112  of the fluid pressure system  102 . The interface can include one or more manifold fastening features  320 , an O-ring seat  322 , or a pressure inlet  324 . The manifold fastening features  320  can include one or more means of fastening the switch  100  to the housing  106 , such as threads, a snap-fitting, a bayonet lug, or other fastening means. The O-ring seat  322  can be configured on the housing  106  to retain an O-ring on the housing  106  during assembly of the switch  100 , during the connection or removal of the switch  100  from the manifold  112 , or during the operation of the switch  100 . In an example, the O-ring seat  322  can be a groove or channel in the housing  106 . The pressure inlet  324  can be a channel positioned on the first housing end. In some examples, the pressure inlet  324  can provide a passage for fluid from the pressure system  102  to come into contact with the piston  212 . 
         [0030]    A second end of the housing  106  can include one or more fastening features to fasten to the connector body  104 . The fastening features can be configured to mate with the fastening features of the connector body  104 . Some examples of fastening features can include threads, energy directors for ultrasonic welding, channels for adhesive, or other features. The fastening features can be included on a collar  326  extending from the housing  106 . The collar  326  can engage with a similar feature on the connector body  104 . In an example, the collar  326  can fit within a similarly shaped and sized feature on the connector body  104 , such as to align the connector body  104  with the housing  106 . Additionally or alternatively, the internal surface of the collar  326  can include an anti-rotation feature (e.g., a flat surface or other keying feature), such as to prevent the receptacle  202  from rotating within the collar  326 . 
         [0031]    A pocket  328  can be included in the second housing end. In an example, the pocket  328  can be sized and shaped to receive the spring plate  208 , spring  206 , and receptacle  202 . The pocket  328  can be configured to have a tapered shape, such as to center the spring plate  208 . The housing  106  can include a passage  306  extending from the first housing end to the second housing end. The passage  306  can be sized and shaped to guide a piston  212  located therein. The passage  306  can be configured to include one or more diameters, such as to prevent the piston  212  from traveling entirely through the passage  306 . 
         [0032]    The housing  106  can include manifold fastening features  320  configured to facilitate the fastening of the pressure switch  100  to the manifold  112 . In some examples, the manifold fastening features  320  can include a hex lug to be engaged by a socket, a knurled finger grip, or other features to aid in fastening the housing  106  to the manifold  112 . 
         [0033]    The material of housing  106  can be any material capable of handling the pressure and structural requirements of the switch  100 . Some examples of the material can include metal or plastic, such as aluminum, zinc alloy, stainless steel, ABS, glass filled polyamide, or other material. In an example, the housing material can be transparent, such as to allow for inspection of a visual indicator within the switch  100 . The visual indicator can be a label or other feature attached to or integrated into the housing  106 , such as to provide a visual indication of the shorting member  214  position with respect to the one or more terminals  204  and the receptacle  202 . 
         [0034]    Although a piston  212  is shown in several examples of switches in the present disclosure, the invention is not so limited. Other actuation configurations, such as a diaphragm, etc. may also be used to actuate a switch. 
         [0035]    The piston  212  can be configured to translate within the passage  306 , such as when pressure is applied to the first piston end (e.g., the head of the piston). The second piston end can engage or be coupled to the spring plate  208 . In one or more examples, the second piston end may include a fastening feature for coupling to the spring plate  208 , such as a snap-fit, press-fit, cotter pin, threads, or other fastening feature. In other examples, the second piston end can fit into a pocket located within the spring plate  208 . Additionally or alternatively, the interface between the piston  212  and the spring plate  208  can include adhesive. The piston  212  can be various materials. The piston  212  could be cast, molded, or machined from metal, such as aluminum, zinc alloy, stainless steel, or other. The piston  212  can be formed from a plastic material, such as polycarbonate, POM, ABS, glass filled polyamide, or other suitable material. In some examples, the material of the piston  212  can be resistant to oil, gasoline, or other chemical or biological agents than can corrode or degrade the material. 
         [0036]    One or more channels can be formed on the surface of the piston  212 , such as to retain at least one seal  210  therein. The seal  210  can be a U-seal. The one or more seals  210  can be positioned between the piston  212  and the housing  106 . In some examples, two or more seals (e.g.  210 A and  210 B as shown in  FIG. 2 ) can be included between the piston  212  and the housing  106 , such as for failure protection, should one of the seals  210 A,  210 B fail. The one or more seals  210  can be configured as static or dynamic seals, such as to prevent leakage between the piston  212  and the housing  106  from the fluid system  102 . In the example of  FIG. 2 , seal  210 A is configured as a static seal, and does not move with motion of the piston  212 . In one example, seal  210 B is a dynamic seal, and moves back and forth with movement of the piston  212 . In one example, each of the seals  210 A,  210 B provides a seal for a different diameter portion ( 212 A,  212 B) of the piston  212 . If one of the seals  210 A,  210 B fails, the non-failing seal will drive the piston either forward or backward depending on which seal fails. In such an embodiment, system pressure will not be lost due to at least one seal not failing. 
         [0037]    In addition, during quality control in manufacturing, if seal  210 B fails, a quality control test can pinpoint the failure of seal  210 B as a result of the different diameters  212 A,  212 B that the seals  210 A,  210 B are sealing. The smaller diameter seal  210 A will require more pressure to actuate the switch, thus indicating that seal  210 B has failed. 
         [0038]    The receptacle  202  extends between a first receptacle end  307  and a second receptacle end  308 . The receptacle  202  can be a cylindrical, rectangular, or other geometric shape. The material of the receptacle  202  can be any material capable of handling the pressure and structural requirements of the switch  100 , such as aluminum, zinc alloy, stainless steel, ABS, POM, glass filled polyamide, or other material. The receptacle  202  includes a cavity  310  (indicated by the dashed line rectangle) in the first receptacle end  307 . The cavity  310  can extend partially through the receptacle  202 . The receptacle  202  can include one or more passages  312  extending therethrough, such as a passage  312  from the cavity  310  to the second receptacle end  308 . The passage  312  can be configured in a plurality of shapes and sizes. The passage  312  can be round, rectangular, the hemispherical, kidney shaped, or other. The size of the passage  312  can be any size permitting the terminal  204  to extend therethrough. Additionally or alternatively, the cavity  312  can extend though the entire receptacle  202 , such as if the passage  312  and the cavity  310  are formed in a single feature. 
         [0039]    In one example, additional passages  312  are included in the receptacle to permit the switch to be configured as normally open, or normally closed. This feature is discussed in more detail in  FIGS. 5 and 6  below. 
         [0040]    A flange  314  can extend outwardly from the receptacle  202 , such as from the second receptacle end  308 . The flange  310  can be perpendicular to the axis of the cavity  310 . In some embodiments, there can be one or more flanges  314  protruding from the receptacle  202 . The flange  314  can be sized and shaped, such as to support one end of one or more springs  206 . In an embodiment, the flange  314  can include at least one anti-rotation feature  316 . The anti-rotation feature  316  can engage the housing  106 , such as to prevent the rotation of the receptacle  202  with respect to the housing  106 . 
         [0041]    The receptacle  202  includes one or more flutes  302  for guiding the shorting member  214 , such as one, two, three, four, or other number of flutes  302 . The flutes  302  can be formed in one or more configurations, such as slots in the receptacle  202 , channels located on the receptacle  202 , or ribs located on the receptacle  202 . The flutes  302  can extend from the first receptacle end  307  in a direction towards the second receptacle end  308  and transverse to the axis of the cavity  310 , such as flutes  302  forming a helical pattern extending from the first receptacle end  307  wrapping around the axis of the cavity  310  in a direction towards a second receptacle end  308 . The flutes  302  can be formed in a clockwise configuration or a counter-clockwise configuration. 
         [0042]    The first receptacle end  307  can function as a hard stop, such as to prevent the translation of the shorting member  214  beyond a specified location, such as configuring the receptacle  202  and the spring plate  208  to interfere if the shorting member  214  has traveled a maximum desired distance. 
         [0043]    The spring plate  208  includes a platform  318  for supporting a second spring end. The platform  318  can be configured with one or more features to center or restrain the movement of the spring  206 , such as a channel sized and shaped to receive the second end of the spring  206 , such as a column rising into the center of the spring  206 , or other feature. The opposite side of the spring plate  208  can be sized and shaped to engage with the housing  106 . The spring plate  208  can include a tapered section, such as to center the spring plate  208  in the housing  106 . The material of the spring plate  208  can be any material capable of handling the pressure and structural requirements of the switch  100 , such as aluminum, zinc alloy, stainless steel, ABS, POM, glass filled polyamide, or other material. 
         [0044]    The spring plate  208  can include a shorting member  214 . The shorting member  214  can be rigidly attached to the spring plate  208 . Alternatively, the shorting member  214  can be rotationally coupled to the spring plate  208 . In one or more examples, the spring plate  208  and shorting member  214  can be configured as one or more individual components that are coupled to one another. In some examples the shorting member  214  can be coupled to an elongate stem extending outwardly from the spring plate  208 . The shorting member  214  can be coupled to the spring plate  208  by way of an insert mold, snap-fit, interference fit, glue, or other means of attachment. A groove or protrusion can be included on the shorting member  214 , such as to aid in the retention of the shorting member  214  within the spring plate  208 . The shorting member  214  can be fabricated in part or in whole from electrically conductive material. The shorting member  214  can include a base material that can be covered or plated by the electrically conductive material. Additionally or alternatively, the shorting member  214  can be fabricated entirely from electrically conductive material, such as copper, stainless steel, bronze, beryllium copper, or other contact material. The base material can be plated with nickel, copper, gold, silver or any combination of electrically conductive plating that is suitable for cyclical contact. The base material can be plated with conductive plating that is suitable for corrosion resistance. The shorting member can be configured to have a current capacity, such as one milliamp, 20 milliamps, one-amp, twenty-amps, or sixty-amps. 
         [0045]    A spring  206  can be supported between the receptacle  202  and the spring plate  208 . The first end of the spring  206  can be supported by the flange  314 . The second end of the spring can be supported by the platform  318  of the spring plate  208 . Each end of the spring can be configured to engage in a stable manner with a support, such as flange  314  or spring plate  208 . In an example, the termination of each spring end can be flat, such as with or without ground ends. A person of ordinary skill in the art will appreciate, after seeing this disclosure, that the spring  206  can be any type of biasing element, such as a coil spring, conical spring, leaf spring, elastomeric body, elastomeric or plastic web, spring fingers, or other type of biasing element. In some embodiments, the material of the spring  206  can be stainless steel, music wire, phosphor bronze, beryllium copper, high carbon steel, spring steel, or other material suitable for spring applications. The compression force of the spring  206  can be configured to a specific application. In an example, the size, shape, and material properties of the spring  206  can be configured to compress a pre-defined length in response to the application of pressure to the piston  212  or spring plate  208  (e.g., switch  100  can have a switch point form 2-350 psi or as low as ½ inch of water). The spring  206  can assist with maintaining a desired orientation (e.g., centered or perpendicular) of the shorting member  214  with respect to the one or more terminals  204 , such as by providing uniform pressure around the periphery of the spring plate  208 . 
         [0046]    The configuration of the switch  100  shown in  FIG. 3  can be an example of a crash resistant switch  100 . The one or more seals  210  can be positioned within the housing  106 , such as to prevent the release of pressure from fluid system  102  in the event that the connector body  104  is damaged or broken from the housing  106 . 
         [0047]      FIG. 4  shows the shorting member  214  at a first location  402  with respect to the one or more terminals  204  according to an embodiment of the invention. The shorting member  214  can be maintained in the first location  402 , such as by the spring  206  biasing the spring plate  208  in a direction away from the receptacle  202 . The receptacle  202 , spring  206 , and spring plate  208  can be captured within the housing pocket  328 , such as by the connector body  104 . The spring  206  can be of sufficient length to bias the receptacle  202  against the connector body  104  and the spring plate  208  against the housing  106 , such as at the furthest distance from the receptacle  202  within the constraints of the housing pocket  328  and the connector body  104 . The shorting member  214  can be engaged within the flutes  302  of the receptacle  202 . The flutes  302  can be configured to control the rotation of the shorting member  214  in response to the position of the spring plate  208  with respect to the receptacle  202 . The configuration of the flutes  302  can dictate the first location  402  and second location  404  of the shorting member  214  with respect to the one or more terminals  204 . 
         [0048]      FIG. 5  shows the shorting member  214  at a second location  404  with respect to the one or more terminals  204  according to an embodiment of the invention. In some examples, the shorting member  214  can be positioned in a second location  404  with respect to the one or more terminals  204 . The shorting member  214  can be positioned in the second location  404  when the spring plate  208  is displaced towards the receptacle  202 , such as when spring  206  is compressed and the shorting member  214  is guided to the second location  404  by the flutes  302  of the receptacle  202 . The shorting member  214  can translate and rotate with respect to the one or more terminals  204  in response to moving from the first location  402  to the second location  404 . 
         [0049]    In the example shown in  FIGS. 4 and 5 , the shorting member  214  moves down in direction  410  in response to increasing pressure, and at the same time is guided by flutes  302  to rotate within the receptacle  202  from location  402  to location  404 . In reverse, in response to decreasing pressure, the shorting member  214  moves up in direction  412  and is guided by flutes  302  to rotate within the receptacle  202  from location  404  to location  402 . 
         [0050]    The switch  100  can be actuated, such as when the shorting member  214  travels from the first location  402  to the second location  404  or when the shorting member  214  travels from the second location  404  to the first location  402 . The actuation can occur as a result of the shorting member  214  making contact with the one or more terminals  204 . In some examples, the change in pressure required move the shorting member  214  from the first location  402  to the second location  404  and then back from the second location  404  to the first location  402 , and vice versa, can occur with low hysteresis, such as 0.10% hysteresis, 1% hysteresis, or 5% hysteresis. The flutes  302  can provide a smooth bearing surface, such as a surface without any transitions in material allowing the shorting member  214  to slide with low friction. Additionally or alternatively, the shorting member  214  and the one or more terminals  204  can undergo low deflection as a result of making contact with one another. The low deflection can reduce fatigue of the shorting member  214  and the one or more terminals  204 , such as extending the usable life of the switch  100 . The shorting member  214  and the one or more terminals  204  can make contact at a trajectory that reduces the degradation of electrical conductivity, such as a trajectory that creates a sliding or wiping contact between the shorting member  214  and the one or more terminals  204 . 
         [0051]    The pressure required to actuate the switch  100  can be configurable, such as to increase or decrease the tolerance of the actuation pressure. In some instances it can be desirable to increase the tolerance of the actuation pressure. A higher tolerance can prevent actuation resulting from momentary pressure fluctuations. 
         [0052]    In an example, the spring  206  included in the switch  100  can be a multitude of lengths or spring-constants, such as to achieve the desired amount of pressure required to actuate the switch  100 . The pressure required to actuate the switch  100  can be 2 PSI, 50 PSI, 100 PSI, or 350 PSI. Additionally or alternatively, the orientation of the receptacle  202  can be configurable with respect to the position of the one or more terminals  204 . The further the shorting member  214  must rotate before making contact with the one or more terminals  204 , the more translation is required of the piston  212 , and thus a greater amount of pressure can be required to compress the spring  206  the necessary amount. 
         [0053]    The orientation of the receptacle  202  can be constrained by the housing  106 , such as by the collar  326  of the housing  106 . By constraining the orientation of the receptacle  202  with respect to the housing  106 , the position of the shorting member  214  with respect to the one or more terminals  204 , for example in the first location  402  or the second location  404 , can be modified, such as by rotating the connector body  104  with respect to the housing  106 . The pressure required to actuate the switch  100  can be modified (e.g., calibrated) while the switch is in operation, such as when pressure is applied to the piston  212  or spring plate  208 . The one or more passages  312  can be sized and shaped to accommodate the rotation of the receptacle  202  with respect to the at least one terminal  204 , such as to prevent interference of one or more terminals  204  with the receptacle  202 . The actuation pressure of the switch  100  can be set before or after the connector body  104  is fastened to the housing  106 . 
         [0054]    In some examples the means of fastening the connector body  104  to the housing  106  can accommodate further adjustment to the actuation pressure of the switch  100 . In some examples, the receptacle  202  can be keyed to the connector body  104 . In this configuration, the connector body  104 , receptacle  202  and shorting member  214  can rotate in unison when the connector body  104  is rotated with respect to the housing  106 . The connector body  104  can be fastened to the housing  106 , such as by a threading means. The actuation pressure of the switch  100  can be configurable by rotating the connector body  104  with respect to the housing  106 , such as by increasing or decreasing the spring compression in response to the translation of the connector body  104  with respect to the housing  106 . The translation can result from the treading or un-threading of the connector body  104  from the housing  106 . The thread pitch can be configured, such as to allow for micro or macro adjustment of the actuation pressure. Additionally or alternatively, the fastening means can result in a fixed actuation pressure of the switch  100 . 
         [0055]    In some examples, an electrical circuit can be closed as a result of the shorting member  214  contacting the one or more terminals  204 . In other examples, the electrical circuit can be opened as a result of the shorting member  214  loosing contact with the one or more terminals  204 . The electrical system  114  can detect whether an open or closed circuit condition exists within switch  100 . The one or more terminals  204  can communicate the condition (e.g., open or closed circuit) of the circuit to the electrical system  114  through the connector interface  304 . 
         [0056]      FIG. 6  shows an embodiment of the swivel actuating pressure switch  100 , such as a normally open configuration of the switch  100 . In the normally open configuration, the switch  100  can be in a non-actuated condition when the shorting member  214  is in the first location  402  with respect to the one or more terminals  204 . In an example, the switch  100  can be in an actuated condition when the shorting member  214  is in a second location  404  with respect to the one or more terminals  204 . The shorting member  214  can rotate and translated with respect to the one or more terminals  204 , such as to make contact with the one or more terminals at the second location  404 . 
         [0057]    In the normally open example of  FIG. 6 , passages  602  hold the terminals  204 , and passages  604  remain unoccupied. By including a number of passages  602 ,  604 , the receptacle  202  component is flexible, and can be manufactured in a single configuration, yet used in a switch that is either configured as normally open, or normally closed. 
         [0058]      FIG. 7  shows an embodiment of the swivel actuating pressure switch  100 , such as a normally closed configuration of the switch  100 . In the normally closed configuration, the switch  100  can be in an actuated condition when the shorting member  214  is in the first location  402  with respect to the one or more terminals  204 . In an example, the switch  100  can be in a non-actuated condition when the shorting member  214  is in a second location  404  with respect to the one or more terminals  204 . The shorting member  214  can rotate and translated with respect to the one or more terminals  204 , such as to break contact with the one or more terminals at the second location  404 . The switch  100  can be configurable, such as to modify the switch  100  to operate in the normally open or normally closed configuration. Modifying the switch  100  from a normally open condition to a normally closed condition can be achieved through the rotation of the connector body  104  with respect to the housing  106  as described above. 
         [0059]    In the normally closed example of  FIG. 7 , passages  702  hold the terminals  204 , and passages  70  remain unoccupied. By including a number of passages  702 ,  704 , the receptacle  202  component is flexible, and can be manufactured in a single configuration, yet used in a switch that is either configured as normally open, or normally closed. 
         [0060]      FIG. 8  shows a configuration of the switch  100  that can be actuated in response to a pressure differential between a first region  804  of the piston  802  and a second region  806  of the piston  802  according to an embodiment of the invention. The fluid pressure system  102  can include at least one fluid at one or more pressure levels. In some examples, the pressure levels include two different positive pressures. In some examples, one of the pressure levels may be negative (e.g. vacuum) and the other positive. In some example, the pressure levels include two different negative pressures. The manifold  112  can include one or more ports, such as a first port  812  containing a fluid at a first pressure and a second port  814  containing a fluid at a second pressure. 
         [0061]    The switch  100  can include a differential piston  802 . The differential piston can include a piston can include more than one surface exposed to the fluid system pressure. In an example, the differential piston can include a first region  804  and a second region  806 . The first region  804  can be at a first end of the piston  802 . The first region  804  can be exposed through a first pressure, such as a first fluid system pressure or atmospheric pressure. The second region  806  can be exposed to a second pressure, such as a second fluid system pressure or atmospheric pressure. The first region  804  can have an equal surface area as the second region  806 , or the first region  804  can have a different surface area than the second region  806 . At least one u-seal  210  can be positioned on either side of piston  802 . Use of a u-seal  210  can prevent the transmission of fluid pressure between the differential piston  802  and the housing  106 . 
         [0062]    The pressure differential between the first region  804  and the second region  806  can displace the piston, such as to displace the spring plate  208 , cause the shorting member  214  to translate and rotate with respect to the one or more terminals, similar to examples shown above, as guided by the receptacle flutes  302 , and actuate the switch  100  in response to the shorting member  214  making contact with the one or more terminals. 
         [0063]      FIG. 9  shows a configuration of the switch  100  used in conjunction with a wax motor according to an embodiment of the invention. In an example, the switch  100  can include a wax motor  900 , such as an apparatus that is extensible in response to a variation in the temperature of the apparatus. The wax motor  900  can be coupled to the piston  212 . The switch  100  can be actuated in response to a temperature variation, such as when an increase or decrease in temperature alters the length of the wax motor  900  resulting in a displacement of the piston  212 . When the piston  212  is displaced, the switch  100  can be actuated. In another example, the wax motor  900  is not coupled to the piston, but rather can control a valve within the pressure port  108  or  110  that exposes the piston  212  to one or more fluid pressures within the fluid pressure system  102  as a result of a temperature change. 
         [0064]      FIG. 10  shows an example method  1000  of using a swivel actuating pressure switch  100  according to an embodiment of the invention. 
         [0065]    At  1002 , method  1000  can include supporting at least one terminal  204  within a connector body  104 . The one or more terminals  204  can be supported within the connector body  104  by various means, such as press-fitting or insert molding the one or more terminals  204  into the connector body  104 . 
         [0066]    At  1004 , a receptacle  202  can be positioned in relation to the location of the one or more terminals  204 . The receptacle  202  can be positioned such that the one or more terminals  204  extend through one or more passages  312  within the receptacle  202 . The receptacle  202  can be rotated about its center axis, such as to modify the location of the receptacle flutes  302  with respect to the one or more terminals. In some examples, the receptacle  202  can be rotated, such as to configure the switch  100  to operate in a normally open configuration or a normally closed configuration. The receptacle  202  can be rotated to modify the pressure required to actuate the switch  100 . 
         [0067]    At  1006 , a shorting member  214  can be guided, by the receptacle flutes  302 , in a direction to translate and rotate the shorting member  214  with respect to the receptacle  202  in response to an application of a specified pressure to a spring plate  208 , wherein the shorting member  214  is coupled to the spring plate  208 . 
         [0068]    At  1008 , a spring  206  can be positioned between the spring plate  208  and the receptacle  202  in order to calibrate the pressure required to translate and rotate the shorting member  214  from a first location  802  with respect to the receptacle  202  to a second location  804  with respect to the receptacle  202 . 
         [0069]    At  1010 , a contact state between the shorting member  214  and the one or more terminals  204  can be modified in response to the translation and rotation of the shorting member  214  from the first location  402  to the second location  404  with respect to the receptacle  202 . 
         [0070]      FIG. 11  shows an example switch  1100  similar to switches shown in other examples discussed above. The switch  1100  of  FIG. 11  includes a receptacle  1110  with flutes, a spring seat  1112 , and a piston  1114  similar to examples shown in other Figures. A shorting member  1116  is shown engaged in the flutes as in other examples. In one method of operation the above listed components (receptacle  1110 , spring seat  1112 , and piston  1114 ) are all free to move to some extent along the direction  1118  within connector body  1102 . In some circumstances, such as an unforeseen overpressure condition, the shorting member  1116  may be forced into the terminals with a larger than normal pressure. 
         [0071]    In the example of  FIG. 11 , a resilient overpressure element  1120  is included between the receptacle  1110  and an adjacent portion of the connector body  1102 . In such an application, the resilient overpressure element  1120  functions to limit motion of components such as the shorting member  1116  such that the shorting member  1116 , the terminals, and other related components will not be damaged if excessive pressure conditions exist. 
         [0072]    In one example, the resilient overpressure element  1120  includes an o-ring. The resilient nature of the resilient overpressure element  1120  functions to allow linear motion of selected elements such as the receptacle  1110 , spring seat  1112 , and piston  1114  when the sorting member  1116  is in contact with the terminals. By allowing a limited amount of linear motion, the possibility of damage to components in an overpressure condition is reduced or eliminated. An appropriate thickness of o-ring, and an appropriate modulus is chosen to provide solid contact, while not allowing excess force that may cause damage. Additionally, in an over pressure condition, the piston  1114  is designed with a shoulder  1115  that bottoms out against the housing  1104  and prevents any possible damage that may result if the piston  1114  were allowed to move unchecked into the housing  1104  and against related components. 
         [0073]    Although an o-ring is shown as an example of a resilient overpressure element  1120 , the invention is not so limited. Other examples may include a coil spring, a flat section rubber ring, a leaf spring, or other biasing device that functions in the same manner. 
         [0074]    While a number of embodiments of the invention are described, the above examples are not intended to be exhaustive. Although specific embodiments have been illustrated and described herein, it will be appreciated by those of ordinary skill in the art that any arrangement that is calculated to achieve the same purpose may be substituted for the specific embodiment shown. This application is intended to cover any adaptations or variations of the present invention. It is to be understood that the above description is intended to be illustrative and not restrictive. Combinations of the above embodiments, and other embodiments, will be apparent to those of skill in the art upon studying the above description. 
         [0075]    The above detailed description includes references to the accompanying drawings, which form a part of the detailed description. The drawings show, by way of illustration, specific embodiments in which the invention can be practiced. These embodiments are also referred to herein as “examples.” Such examples can include elements in addition to those shown or described. However, the present inventors also contemplate examples in which only those elements shown or described are provided. Moreover, the present inventors also contemplate examples using any combination or permutation of those elements shown or described (or one or more aspects thereof), either with respect to a particular example (or one or more aspects thereof), or with respect to other examples (or one or more aspects thereof) shown or described herein. 
         [0076]    In the event of inconsistent usages between this document and any documents so incorporated by reference, the usage in this document controls. 
         [0077]    In this document, the terms “a” or “an” are used, as is common in patent documents, to include one or more than one, independent of any other instances or usages of “at least one” or “one or more.” In this document, the term “or” is used to refer to a nonexclusive or, such that “A or B” includes “A but not B,” “B but not A,” and “A and B,” unless otherwise indicated. In this document, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Also, in the following claims, the terms “including” and “comprising” are open-ended, that is, a system, device, article, composition, formulation, or process that includes elements in addition to those listed after such a term in a claim are still deemed to fall within the scope of that claim. Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects. 
         [0078]    To better illustrate the method and apparatuses disclosed herein, a non-limiting list of embodiments is provided here: 
         [0079]    Example 1 includes a swivel actuating pressure switch comprising a connector body including at least one terminal supported therein, a spring seat coupled to a shorting member, a receptacle for guiding the shorting member in a direction to translate and rotate the shorting member with respect to the receptacle, and a spring coupled to the spring seat and receptacle, wherein the spring provides a reaction force such that a specified pressure applied to the spring seat will translate and rotate the shorting member from a first location to a second location with respect to the one or more terminals. 
         [0080]    Example 2 includes the swivel actuating pressure switch of example 1, further comprising a piston and a housing, wherein the specified pressure is applied to the spring seat by way of the piston and at least one seal is positioned between the piston and the housing. 
         [0081]    Example 3 includes the swivel actuating pressure switch of any one of examples 1-2, wherein the switch components can be interchangeably arranged using the same components such that the switch operates in a normally open or normally closed condition. 
         [0082]    Example 4 includes the swivel actuating pressure switch of any one of examples 1-3, wherein the pressure required to translate and rotate the shorting member from the first location to the second location is configurable by rotating the connector body with respect to the receptacle. 
         [0083]    Example 5 includes the swivel actuating pressure switch of any one of examples 1-4, wherein the pressure required to translate and rotate the shorting member from the first location to the second location occurs as a result of a pressure differential between two or more pressure ports. 
         [0084]    Example 6 includes the swivel actuating pressure switch of any one of examples 1-5, further including a resilient overpressure element to absorb an amount of pressure on the shorting member in an overpressure condition. 
         [0085]    Example 7 includes the swivel actuating pressure switch of any one of examples 1-6, wherein the piston includes two seals between the piston and the housing that seal two different diameters on the piston. 
         [0086]    Example 8 includes the swivel actuating pressure switch of any one of examples 1-2, wherein the shorting member, spring seat, and piston are integrated into a single component. 
         [0087]    Example 9 includes a swivel actuating pressure switch for use in fluid systems comprising a connector body including at least one terminal supported therein and a connector interface, a spring seat coupled to a shorting member support and a shorting member coupled to the shorting member support, a receptacle for guiding the shorting member in a direction to translate and rotate the shorting member with respect to the receptacle, a piston coupled to the spring seat, wherein the shorting member is positioned in a first location with respect to the one or more terminals and in response to the application of a specified pressure to the piston, the shorting member is translated and rotated to a second location with respect to the one or more terminals, a spring coupled to the spring seat and the receptacle, wherein the spring provides a reaction force necessary to translate and rotate the shorting member from the first location to the second location in response to the specified pressure, a housing including an outer surface extending between a first-housing-end and a second-housing-end and a passage extending axially therethrough, wherein the first-housing-end includes a means of fastening and sealing to a manifold, and at least one u-seal positioned between the piston and the housing. 
         [0088]    Example 10 includes the swivel actuating pressure switch of example 9, wherein the pressure required to translate and rotate the shorting member from the first location to the second location is configurable by rotating the connector body with respect to the receptacle. 
         [0089]    Example 11 includes the swivel actuating pressure switch of any one of examples 9-10, wherein the pressure required to translate and rotate the shorting member from the first location to the second location occurs as a result of a pressure differential between two or more pressure ports. 
         [0090]    Example 12 includes the swivel actuating pressure switch of any one of examples 9-11, wherein the switch components can be interchangeably arranged using the same components such that the switch operates in a normally open or normally closed condition. 
         [0091]    Example 13 includes a method of using a swivel actuating pressure switch comprising, supporting at least one terminal within a connector body, positioning a receptacle in relation to the location of the one or more terminals, wherein the receptacle includes at least one flute, guiding a shorting member in a direction to translate and rotate the shorting member with respect to the receptacle in response to an application of a specified pressure to a spring seat, wherein the shorting member is coupled to the spring seat, positioning a spring between the spring seat and the receptacle to calibrate the pressure required to translate and rotate the shorting member from a first location with respect to the receptacle to a second location with respect to the receptacle, and modifying a contact state of the shorting member and the one or more terminals in response to the translation and rotation of the shorting member from the first location to the second location with respect to the receptacle. 
         [0092]    Example 14 includes the method of example 13, wherein the pressure originates from an internal combustion engine. 
         [0093]    Example 15 includes the method of example 13, wherein the pressure originates from a pneumatic system. 
         [0094]    Example 16 includes the method of example 13, wherein the pressure originates from a hydraulic system. 
         [0095]    Example 17 includes the method of any one of examples 13-16, wherein the pressure for modifying the contact state of the switch is configurable while the switch is in operation by rotating the connector body with respect to the receptacle. 
         [0096]    Example 18 includes the method of any one of examples 13-17, wherein the pressure for modifying the contact state of the switch is a differential pressure between two or more pressure ports. 
         [0097]    Example 19 includes the method of any one of examples 13-18, wherein the switch components can be interchangeably arranged such that the switch operates in a normally open or normally closed condition. 
         [0098]    The above description is intended to be illustrative, and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. Other embodiments can be used, such as by one of ordinary skill in the art upon reviewing the above description. The Abstract is provided to comply with 37 C.F.R. §1.72(b), to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. Also, in the above Detailed Description, various features may be grouped together to streamline the disclosure. This should not be interpreted as intending that an unclaimed disclosed feature is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the Detailed Description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that such embodiments can be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.