IL26544A - Interruptable jet unit - Google Patents

Description

An interr jet RAYMOND application that laminar streams having a length of over fifteen times their width are very susceptible to disturbance by mechanical Such streams can reform themselves within one millisecond after the occurrence of the Under certain operating conditions mechanical interruptions of as little as fifty millionths of an inch can be detected by a typical turbulence amplifier Accordingly a unit of this nature can be a very useful triggering device to a fluid amplifier A major problem in the use of laminar streams for the detection of physical objects or turbulent is that the collector of the said streams may become clogged foreign objects in the If detection is to take place in a where the ambient atmosphere is laden paint grease this problem takes on proportions of considerable Other systems for the detection of such as may be unusable in many of these since the contaminants in the ambient atmosphere will cover the cell and the light causing unreliable it is the principal object of the sent invention to provide a interruptable jet which will function under conditions of extreme atmospheric independently of any foreign objects present within the ambien This invention consists of a supply source projecting a laminar or turbulent stream over any suitable distance into the orifice of a collecting tube in the familiar interruptable jet a flow of air of sufficient magnitude is provided by a pressure source into the collector tube so that the stream strikes the orifice it is unable to and the flow of air from the collector tube is restrained as it exits through the When the stream is broken or by means of an air the flow through the tor tube takes place with such ease that it may then exit through the orifice with virtually no The collector tube includes an outward When the laminar or turbulent stream is the flow through the collector tube will exit through the outward since for all intents and poses the collector orifice appears as a plug to this flow of When the stream the flow in the collector tube exits entirely through the collector orifice and no appreciable flow is observed at the outward It should be noted that a laminar stream is much more sensitive to disturbance a turbulent It is a further object the present invention to provide a device of the character described which none of the fluid from the stream will ever enter into the orifice or the collector consequently making it impossible for there to be any clogging or material therein from the A feature of the present invention is the provision of an enclosure to protect the operating parts as well as the stream from vibrations of machinery to which the structure may be These objects and as well as other portion and there is a readable pressure at the orifice Should the stream 18 become it is then possible for the stream 19 to pass out of the orifice 16 and into the At that point the pressure at the orifice 39 will drop to essentially zero since practically all of the will be passing out of the orifice When the interruption is the stream 18 once again reaches the venting the flow the stream 19 therefrom and causing it instead to pass once more out through portion Figure 3 illustrates a somewhat different embodiment in which a mount 4l holds a supply tube 10 and a collector tube an input orifice 44 with a restriction 46 in the culminating in an orifice 48 to which is directed the stream A connector tube joined to the collector tube 42 and has an opening therein and a second opening where it joins the output tube The output tube has a blocked end and an put orifice In this embodiment the output tube is parallel to that of the collector tube rather than perpendicular as shown in Figure has been found that this is a more venient configuration for the majority of uses of the jet Among the advantages of the configuration is that it can be rotated around an axis passing through the collector The restriction 46 in the collector tube 42 maintains a low flow velocity to the orifice This flow may be third or less than the flow passing through the supply tube 10 and emanating as the stream Figures and 6 illustrate a commercial There is shown a interruptable jet having a protective enclosure 62 including a top wall 64 having an interrupted opening a bottom wall a front end wall and rear end wall with openings and 76 defined The side walls 77 are broken by openings 79 having the same supply tube and other apparatus as hereinafter and is spaced from the enclosure walls by means of mounts 80 made of a springy material to insulate the apparatus from vibration and the A flexible tube 82 connects the supply tube 10 to a 8 the base of the Y connected to tube One of the Y is connected by a tube 86 to the mount 78 cured the opening 76 of the wall The other fork of the Y is connected by tube 89 to a second piece of tube and thence to the input orifice 44 of the collector tube The output tube is connected by a tube 93 to the output member 90 within the opening 7 of the wall In this embodiment a bore 92 has been drilled in the mount and connects the tube 42 to an opening 95 of the output tube A plug 9 closes off the bore 92 Operation of this embodiment is similar to that of other discussed The use of the shock mounts 80 allows the structure to be attached to a machine from which vibrations may since the mounts will effectively insulate the useful operation of the unit from the attendant vibrations which may be capable of upsetting a laminar Sufficient air flows to the collector tube 42 through the tubes 89 and even though they are connected to one of the forks the This is so since the collector tube operates on a much lower flow than that of the supply wish it to be understood that I do not consider the invention limited to the precise details of structure shown and set forth in this for obvious modifications will occur to those skilled in the art to which the insufficientOCRQuality

Claims (4)

HAVIHO ¾0W particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is <' · The embodiments of the invention in which an ex- ■', -elusive property or privilege is claimed are defined as follows : ·.

1. A collector-venting interrup able jet apparatus, "■[·'..-, comprising: , ", a) means for producing a first fluid stream in a ;· laminar or turbulent flow condition; ' ; ,:. ·■; b) collector means for sensing the presence of said first stream, said collector means including a collector : ; element with an input orifice and a collector orifice, the ·"; collector element being spaced from and in an axial alignment with the means producing the stream; and c) means connected to the input orifice providing a second fluid source producing a second fluid stream, the pressure of the second stream being sufficient to. prevent flow ofy the first stream into the collector orifice while the first stream is in an uninterrupted state.

2. The invention according to Claim 1, the collector ' element being a tube including an output orifice in the output .. ■- - !y portion, the second fluid source exiting from the collector tube . through the output portion when the first fluid stream is in an uninterrupted state, allowing a pressure to be read at the out- . put orifice. °Π'- 0'

3. The invention according to Claim 2, the output portion being angularly disposed with respect to the collector ·■ tube. * - ;

4. The invention according to Claim 3* further characterized in that the angular inclination of the output portion is substantially perpendicular to the axis of the collector tube.. 5« The invention according to Claim 1, the collector means Including a connector tube connected to the collector tube