WO2009022264A1 - Signal actuation device for switches and relative method of realization - Google Patents

Signal actuation device for switches and relative method of realization Download PDF

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Publication number
WO2009022264A1
WO2009022264A1 PCT/IB2008/053140 IB2008053140W WO2009022264A1 WO 2009022264 A1 WO2009022264 A1 WO 2009022264A1 IB 2008053140 W IB2008053140 W IB 2008053140W WO 2009022264 A1 WO2009022264 A1 WO 2009022264A1
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WO
WIPO (PCT)
Prior art keywords
layer
previous
nickel
switch
device body
Prior art date
Application number
PCT/IB2008/053140
Other languages
French (fr)
Inventor
Giovanni Soldo
Original Assignee
Soldo S.R.L. Socio Unico
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Soldo S.R.L. Socio Unico filed Critical Soldo S.R.L. Socio Unico
Publication of WO2009022264A1 publication Critical patent/WO2009022264A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/60—Angularly-movable actuating part carrying no contacts
    • H01H19/62—Contacts actuated by radial cams
    • H01H19/623—Adjustable cams
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/02—Details
    • H01H19/10—Movable parts; Contacts mounted thereon
    • H01H19/14—Operating parts, e.g. turn knob
    • H01H19/18—Operating parts, e.g. turn knob adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/12—Means for earthing parts of switch not normally conductively connected to the contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"

Definitions

  • the present invention concerns a signal actuator device for switches, for example electromechanical, and the relative method of realization.
  • the present invention refers to actuator devices comprising device bodies housed inside electromechanical switches, magnetic reeds, inductive sensors, transmitters and similar.
  • the activating elements usually comprise a revolving shaft and an activating body, such as a cam or a lever for example.
  • the activating body revolving with the shaft, activates one or more switches operatively connected to valves for example.
  • Said currently available actuator devices are often used and installed in aggressive environments which cause their rapid deterioration until the revolving shaft and the container seize up.
  • the problem of the present invention is to create an actuator device which solves the problems mentioned with reference to currently used techniques. [0016] These problems and restrictions are solved by an actuator device according to claim 1 and by a method of realization according to claim 18.
  • figure 1 represents a prospective view in configuration of assembly of a device according to an embodiment of the present invention
  • figure 2 represents a prospective view in separate parts of the device in figure 1 ;
  • figure 3 represents a plan view of the device in figure 1, from the side of arrow III of figure 1 ;
  • figure 4 represents a sectioned view of the device in figure 1, along the section line IV-VI in figure 3;
  • figure 5 represents a lateral view of the device in figure 1, from the side of arrow V of figure 1 ;
  • figure 6 represents a magnified view of part VI in figure 5.
  • a signal actuator device comprising a device body 8 defining a container chamber 12.
  • the device body houses in said container chamber 12 at least one switch 16, an electromechanical switch for example, a magnetic reed, an inductive sensor, a transmitter and similar.
  • the device body also comprises at least one activating element 20 of said at least one switch 16; according to one embodiment, the activating element 20 comprises a revolving shaft 24 and an activating body 28 operatively connected to the revolving shaft 24 for the activation of said at least one switch 16.
  • the activating element 20 is preferably housed in the container chamber 12 and can comprise, for example, a cam suitable for activating said switch 16.
  • the device body 8 comprises at least one coupling seat 30 suitable for housing and providing rotating support for said revolving shaft 24, said seat is for example positioned in correspondence with a lower wall 31 of the device body 8.
  • said coupling seat 30 passes through a wall of said body 8, preferably through said lower wall 31.
  • a sealing element 54 such as an O-ring, suitable for guaranteeing the hermetic seal between the device body 8 and the shaft 24.
  • the device body 8 is covered with a layer of nickel coating 40 which covers at least an outer surface 44, said outer surface 44 being opposite the container chamber 12 and directly in contact with the environment outside the actuator device 4.
  • the layer of nickel 40 covers the coupling seat 30 in such a way as to make a direct contact between a coupling area 48 of the revolving shaft 24 and said layer of nickel coating 40.
  • the device body 8 comprises at least one connection hole 50, preferably separate from said coupling seat 30, suitable for enabling the passage of electrical connection wires of the switch 16; the connection hole 50 is advantageously covered by said layer of nickel coating 40.
  • said at least one connection hole 50 has a threaded portion 52, covered with said layer of nickel coating 40, said threaded portion 52 being suitable for accepting the screwing in of a terminal of an electrical connection wire of the switch.
  • said layer of nickel coating 40 covers said device body 8 entirely, so that the body is covered entirely in nickel.
  • the device body 8 is made of aluminium; preferably, said device body 8 is hermetically sealed off from the environment outside the device 4. In other words, the container chamber 12 is hermetically sealed so that it cannot be polluted by the external environment in which the device 4 is installed.
  • the layer of coating 40 is between 10 and 30 m thick; even more preferably, said layer of coating 40 is 20 m thick.
  • the device body 8 comprises a lid 60, preferably positioned opposite said coupling seat 30 and suitable for providing a rotating support for said revolving shaft 24.
  • the lid 60 comprises a translucid or transparent portion 66 in order to allow the vision of said revolving shaft 24.
  • said revolving shaft 24 is associated to an angular position indicator 64, suitable for supplying a visual indication of the angular position of the activating element 20, said indicator 64 being visible through the translucid or transparent portion 66 of the lid 60.
  • the device body 8 may comprise means of support 68 of the device 4 mechanically connected to the body by means of screw fastenings 70 screwed into the relative fastening holes 72, said fastening holes 72 being covered with the layer of nickel 40.
  • said device body 8 comprises at least one electric conductor element positioned in contact with said layer of nickel coating, in order to earth the device.
  • the earthing can be accomplished through direct contact between the cable glands of the electrical connection wires of the switch 16 and the layer of coating 40 which is an electrical conductor.
  • the device body is initially made, by casting aluminium for example.
  • the nickel coating is applied, preferably using a nickel bath.
  • the device body is entirely covered, also in correspondence with the shaft coupling seat and the threaded holes for the electrical connections of the switch of for connection of the means of support of the device body. [0049] The switch, the activating element and any angular position indicator are then assembled.
  • the actuator device according to the present invention makes it possible to overcome the problems of the currently used technique.
  • the layer of nickel coating offers excellent resistance to corrosion, albeit with a very fine layer of coating.
  • the limited thickness of the layer of coating guarantees the possibility for application to complex shapes and small parts of device bodies and also to threaded holes without preventing the tightening of the screws .
  • the layer of nickel guarantees excellent electrical conductibility and therefore allows the earthing of the device body with the application of earth wires directly to the outside of the body or to threaded terminals or cable glands inserted into the covered threaded holes of the body.
  • the layer of nickel considerably increases the surface hardness of the device body and enables the assembly of the revolving shaft directly on contact with the body without requiring the use of brasses and/or covering in polymeric material.
  • the nickel coating allows the direct tightening of the screws to the body as, thanks to its extremely reduced and constant thickness, it does not contrast the engagement between the screw and the threaded hole.
  • connection holes for the fastening of posts and supports for the device with nickel; therefore these connections too will be protected against corrosion as time goes by.
  • a technician in the sector in order to meet contingent and specific requirements, may make numerous changes and variations to the actuator devices described above, all of which are contained within the context of the invention as defined by the following claims.

Abstract

A signal actuation device (4) for switches (16) with high resistance to corrosion. The device (4) allows the assembly of a revolving activation element (20) without requiring the use of brasses or bushes and also allows the earthing of the device by applying an earth wire directly to the device body (8).

Description

DESCRIPTION
"SIGNAL ACTUATION DEVICE FOR SWITCHES AND RELATIVE METHOD OF REALIZATION"
[0001] The present invention concerns a signal actuator device for switches, for example electromechanical, and the relative method of realization.
[0002] In particular, the present invention refers to actuator devices comprising device bodies housed inside electromechanical switches, magnetic reeds, inductive sensors, transmitters and similar.
[0003] It is standard practice to make device bodies of for installation inside the activating elements of said switches; the activating elements usually comprise a revolving shaft and an activating body, such as a cam or a lever for example.
[0004] The activating body, revolving with the shaft, activates one or more switches operatively connected to valves for example. [0005] Said currently available actuator devices are often used and installed in aggressive environments which cause their rapid deterioration until the revolving shaft and the container seize up.
[0006] To prevent these problems it is standard practice to make waterproof device bodies, to stop dirt from entering them, and then to cover them in order to prevent corrosion as time goes by.
[0007] The solutions available have several disadvantages. [0008] For example, it is quite common to make device bodies in metal, especially aluminium, and then paint them with special paints to protect the metal from corrosion. However the thickness of the paint makes application in narrow spaces difficult.
[0009] Moreover, this thickness is not constant, so there is a tendency to avoid applying paint to the coupling between the device body and the revolving shaft. Therefore, to prevent the housing of the shaft from deteriorating and causing the shaft to seize up, brasses, preferably lined on the inside with polymeric bushes, are installed, suitable for guaranteeing a low coefficient of friction and offering good resistance to corrosion. However this results in a considerable increase in production costs and assembly times.
[0010] Moreover, the paint cannot be applied to threaded holes otherwise it would be impossible to tighten screws and cable glands. Therefore threaded holes have no protection against corrosion.
[0011] It is also common to anodise the aluminium containers. This procedure can also be carried out on small surfaces and on threaded holes, but has the disadvantage of offering very little resistance to corrosion .
[0012] Moreover, it prevents the surface to which it is applied from being electrically conductive, meaning that the device cannot be earthed with direct connections to the body itself or to the threaded holes. Therefore, anodised device bodies must have areas of the surface which are not covered or it must be possible to avoid covering some of the threaded holes to allow the bodies to be earthed. [0013] Moreover, the coupling between the hole and the shaft is not protected sufficiently against wear due to the rubbing of the shaft, so to avoid the risk of it seizing up, brasses must be used anyway. [0014] It has also been known to proceed with hard oxidisation of the device body. This procedure guarantees good resistance to corrosion and good hardening of the shaft coupling surface. In any case, hard oxidisation does not guarantee good electric conductivity, so to guarantee the effective earthing of the device body, some areas of the device body, such as some of the threaded holes, must not be covered. These areas are therefore exposed to problems of corrosion.
[0015] The problem of the present invention is to create an actuator device which solves the problems mentioned with reference to currently used techniques. [0016] These problems and restrictions are solved by an actuator device according to claim 1 and by a method of realization according to claim 18.
[0017] Other embodiments of the device according to the invention are described in the subsequent claims.
[0018] Further characteristics and advantages of the present invention shall become clearer in the description of preferable but non-restrictive embodiments, in which: [0019] figure 1 represents a prospective view in configuration of assembly of a device according to an embodiment of the present invention;
[0020] figure 2 represents a prospective view in separate parts of the device in figure 1 ; [0021] figure 3 represents a plan view of the device in figure 1, from the side of arrow III of figure 1 ;
[0022] figure 4 represents a sectioned view of the device in figure 1, along the section line IV-VI in figure 3; [0023] figure 5 represents a lateral view of the device in figure 1, from the side of arrow V of figure 1 ; [0024] figure 6 represents a magnified view of part VI in figure 5.
[0025] The elements or parts of elements in common between the embodiments described hereinafter shall be indicated with the same numeric references. [0026] With reference to said figures, 4 is used to globally indicate a signal actuator device comprising a device body 8 defining a container chamber 12. [0027] The device body houses in said container chamber 12 at least one switch 16, an electromechanical switch for example, a magnetic reed, an inductive sensor, a transmitter and similar.
[0028] The device body also comprises at least one activating element 20 of said at least one switch 16; according to one embodiment, the activating element 20 comprises a revolving shaft 24 and an activating body 28 operatively connected to the revolving shaft 24 for the activation of said at least one switch 16. The activating element 20 is preferably housed in the container chamber 12 and can comprise, for example, a cam suitable for activating said switch 16.
[0029] The device body 8 comprises at least one coupling seat 30 suitable for housing and providing rotating support for said revolving shaft 24, said seat is for example positioned in correspondence with a lower wall 31 of the device body 8.
[0030] According to one embodiment, said coupling seat 30 passes through a wall of said body 8, preferably through said lower wall 31. [0031] For example, between the coupling seat 30 and the revolving shaft 24 there is a sealing element 54, such as an O-ring, suitable for guaranteeing the hermetic seal between the device body 8 and the shaft 24. [0032] Advantageously, the device body 8 is covered with a layer of nickel coating 40 which covers at least an outer surface 44, said outer surface 44 being opposite the container chamber 12 and directly in contact with the environment outside the actuator device 4. [0033] Advantageously, the layer of nickel 40 covers the coupling seat 30 in such a way as to make a direct contact between a coupling area 48 of the revolving shaft 24 and said layer of nickel coating 40.
[0034] According to one embodiment, the device body 8 comprises at least one connection hole 50, preferably separate from said coupling seat 30, suitable for enabling the passage of electrical connection wires of the switch 16; the connection hole 50 is advantageously covered by said layer of nickel coating 40. [0035] According to one embodiment, said at least one connection hole 50 has a threaded portion 52, covered with said layer of nickel coating 40, said threaded portion 52 being suitable for accepting the screwing in of a terminal of an electrical connection wire of the switch. [0036] Advantageously, said layer of nickel coating 40 covers said device body 8 entirely, so that the body is covered entirely in nickel.
[0037] According to a preferred embodiment, the device body 8 is made of aluminium; preferably, said device body 8 is hermetically sealed off from the environment outside the device 4. In other words, the container chamber 12 is hermetically sealed so that it cannot be polluted by the external environment in which the device 4 is installed. [0038] Preferably, the layer of coating 40 is between 10 and 30 m thick; even more preferably, said layer of coating 40 is 20 m thick.
[0039] According to a possible embodiment, the device body 8 comprises a lid 60, preferably positioned opposite said coupling seat 30 and suitable for providing a rotating support for said revolving shaft 24. [0040] Preferably, the lid 60 comprises a translucid or transparent portion 66 in order to allow the vision of said revolving shaft 24.
[0041] For example, said revolving shaft 24 is associated to an angular position indicator 64, suitable for supplying a visual indication of the angular position of the activating element 20, said indicator 64 being visible through the translucid or transparent portion 66 of the lid 60. [0042] The device body 8 may comprise means of support 68 of the device 4 mechanically connected to the body by means of screw fastenings 70 screwed into the relative fastening holes 72, said fastening holes 72 being covered with the layer of nickel 40.
[0043] According to a possible embodiment, said device body 8 comprises at least one electric conductor element positioned in contact with said layer of nickel coating, in order to earth the device. For example, the earthing can be accomplished through direct contact between the cable glands of the electrical connection wires of the switch 16 and the layer of coating 40 which is an electrical conductor.
[0044] The method of realization of the device according to the present invention will now be described. [0045] In particular, the device body is initially made, by casting aluminium for example.
[0046] Preferably, before applying the nickel coating, all the threaded holes of the device body and the coupling seat for the revolving shaft are made. [0047] After making these holes and this seat, the nickel coating is applied, preferably using a nickel bath.
[0048] Following the bath, the device body is entirely covered, also in correspondence with the shaft coupling seat and the threaded holes for the electrical connections of the switch of for connection of the means of support of the device body. [0049] The switch, the activating element and any angular position indicator are then assembled.
[0050] As can be seen from the description above, the actuator device according to the present invention makes it possible to overcome the problems of the currently used technique.
[0051] In particular, the layer of nickel coating offers excellent resistance to corrosion, albeit with a very fine layer of coating. [0052] The limited thickness of the layer of coating guarantees the possibility for application to complex shapes and small parts of device bodies and also to threaded holes without preventing the tightening of the screws . [0053] It is therefore possible to guarantee the covering of the whole device body without leaving even the tiniest parts uncovered and therefore exposed, over a period of time, to the problems of corrosion and the danger of dirt entering the device body and its consequent malfunction. [0054] Advantageously, the layer of nickel guarantees excellent electrical conductibility and therefore allows the earthing of the device body with the application of earth wires directly to the outside of the body or to threaded terminals or cable glands inserted into the covered threaded holes of the body. [0055] Advantageously the layer of nickel considerably increases the surface hardness of the device body and enables the assembly of the revolving shaft directly on contact with the body without requiring the use of brasses and/or covering in polymeric material.
[0056] Advantageously it is possible to carry out all the mechanical process on the device body before covering it with nickel. In fact, this covering directly guarantees the electrical conductivity of the body and does not require its partial removal to allow the body to be earthed.
[0057] Moreover, the nickel coating allows the direct tightening of the screws to the body as, thanks to its extremely reduced and constant thickness, it does not contrast the engagement between the screw and the threaded hole.
[0058] Advantageously it is also possible to coat all the connection holes for the fastening of posts and supports for the device with nickel; therefore these connections too will be protected against corrosion as time goes by. [0059] A technician in the sector, in order to meet contingent and specific requirements, may make numerous changes and variations to the actuator devices described above, all of which are contained within the context of the invention as defined by the following claims. SHEET INTENTIONALLY LEFT BLANK

Claims

Claims
1. Signal actuator device (4) comprising
- a device body (8) defining a container chamber (12), at least one switch (16) housed in said container chamber (12) ,
- at least one activating element (20) of said at least one switch (16), comprising a revolving shaft (24) and an activating body (28) operatively connected to the revolving shaft (24) for the activation of said at least one switch (16), said activating element (20) being housed in the container chamber (12),
- the device body (8) comprising at least one coupling seat (30) suitable for housing and providing a rotating support for said revolving shaft (24), characterised by the fact that
- the device body (8) is covered with a layer of nickel coating (40) which covers at least its outer surface (44), said outer surface (44) being opposite the container chamber (12) and directly in contact with the environment outside the actuator device (4) .
2. Device (4) according to claim 1, in which said layer of nickel (40) covers the coupling seat (30) in such a way as to make a direct contact between a coupling area
(48) of the revolving shaft (24) and said layer of nickel coating (40) .
3. Device (4) according to claim 1 or 2, in which the device body (8) comprises at least one connection hole
(50), separate from said coupling seat (30), suitable for enabling the passage of electrical connection wires of the switch (16), the connection hole (50) being covered by said layer of nickel coating (40) .
4. Device (4) according to claim 3, in which said at least one connection hole (50) has a threaded portion (52), covered with said layer of nickel coating (40), said threaded portion (52) being suitable for accepting the screwing in of a terminal of an electrical connection wire of the switch (16) .
5. Device (4) according to any of the previous claims, in which said layer of nickel coating (4) covered said device body (8) entirely.
6. Device (4) according to any of the previous claims, in which said coupling seat (3) passes through a wall of said body.
7. Device (4) according to any of the previous claims, comprising, between said coupling seat (30) and said revolving shaft (24), a sealing element (54) suitable to guarantee the hermetic seal between the body (8) and the shaft (24) .
8. Device (4) according to claim 7, in which said sealing element (54) comprises at least one O-ring.
9. Device (4) according to any of the previous claims, in which said layer of coating (40) is between 10 and 30 m thick.
10. Device (4) according to any of the previous claims, in which said layer of coating (40) is 20 thick.
11. Device (4) according to any of the previous claims, in which said device body (8) comprises a lid (60), positioned opposite said coupling seat (30) and suitable for providing rotating support for said revolving shaft (24) .
12. Device (4) according to claim 11, in which lid (60) comprises a translucid or transparent portion (66), to allow the vision of said activating element (20) .
13. Device (4) according to claim 12, in which said revolving shaft (24) is associated to an angular position indicator (64), suitable for supplying a visual indication of the angular position of the activating element (20), said indicator (64) being visible through the translucid or transparent portion (66) of the lid (60) .
14. Device (4) according to any of the previous claims, in which said device body (8) is made of aluminium.
15. Device (4) according to any of the previous claims, in which said device body (8) is hermetically sealed off from the environment outside the device.
16. Device (4) according to any of the previous claims, in which said body (8) comprises means of support (68) of the device mechanically connected to the body (8) by means of screw fastenings (70) screwed into relative fastening holes (72), said fastening holes (72) being covered with the layer of nickel (40) .
17. Device (4) according to any of the previous claims, in which said device body (8) comprises at least one electric conductor element positioned in contact with said layer of nickel coating (40), in order to earth the device (4) .
18. Method of realization of a device (4) according to any of claims 1 to 17, comprising the phases of construction of the device body 8, treatment of the device body (8) in a nickel bath in order to coat said body with a layer of nickel (40), assembly of at least one switch (16) and at least one activating element (20) of the switch (16) in said container chamber (12) .
19. Method of realization according to claim 18, comprising the phase of creating the hermetic seal of said container chamber (12) .
20. Method of realization according to claim 19 or 10, comprising the phase of accomplishing the earthing of the actuator device (4) connecting at least one electrical conductor element electrically connected to said layer of nickel coating (40) .
PCT/IB2008/053140 2007-08-10 2008-08-05 Signal actuation device for switches and relative method of realization WO2009022264A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS2007A000124 2007-08-10
ITBS20070124 ITBS20070124A1 (en) 2007-08-10 2007-08-10 SIGNAL ACTUATOR DEVICE FOR SWITCHES AND ITS CONSTRUCTION METHOD

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WO2009022264A1 true WO2009022264A1 (en) 2009-02-19

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CN102760610A (en) * 2011-04-28 2012-10-31 通用设备和制造公司 Enclosed proximity switch assembly
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CN102760610A (en) * 2011-04-28 2012-10-31 通用设备和制造公司 Enclosed proximity switch assembly
WO2012148970A1 (en) * 2011-04-28 2012-11-01 General Equipment And Manufacturing Company, Inc., D/B/A Topworx, Inc. Enclosed proximity switch assembly
US8593241B2 (en) 2011-04-28 2013-11-26 General Equipment And Manufacturing Company, Inc. Enclosed proximity switch assembly
KR20140018952A (en) * 2011-04-28 2014-02-13 제네럴 이큅먼트 앤드 매뉴팩처링 컴패니, 아이엔씨., 디/비/에이 탑웍스, 아이엔씨. Enclosed proximity switch assembly
AU2012249869B2 (en) * 2011-04-28 2016-05-12 General Equipment And Manufacturing Company, Inc., D/B/A Topworx, Inc. Enclosed proximity switch assembly
KR101942116B1 (en) * 2011-04-28 2019-01-24 제네럴 이큅먼트 앤드 매뉴팩처링 컴패니, 아이엔씨., 디/비/에이 탑웍스, 아이엔씨. Enclosed proximity switch assembly
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WO2014035856A1 (en) * 2012-08-29 2014-03-06 General Equipment And Manufacturing Company, Inc., D/B/A Topworx, Inc. Apparatus for fluid control device monitoring
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