Патент USA US2369319код для вставки
Feb. 13, 1945. ’ 15. T. SMITH GAUGE Filed May 31, 1945 ' _ l2,369,319 Pagina Feb. 13, 194s ' 1 2,369,319 N ' ` - j UNITE-D 'STATES “PATEnrÍorFlcs 'i a . _ assaut `dauer: a, raul ".r. smnasmw'v, Mien., saigner 'to dem Corporation, Detroit, Mich., a cor eral ’ Motors poration or Delaware ` _ Application my s1, 194s, semi N». 489,140 'z claims. (c1. .sa-sus) ' capes is not adjacent >the surface being tested. This invention relates to measuring and test ing apparatus and more specifically to that type of measuring' apparatus operating on the princi but-is remotely controlled from parts contacting that surface which avoid ‘errors introduced by rough surfaces and abnormal conditions; ple of leakage ofair for determining distances or dimensions. There have 'been in use for some time air gauges which operate on the principle of air leakage from- a testing or -checking- nozzle It is a still further object of- my invention to provide a portable checkingnozzle that may be utilized over a considerable distance for dimen , which is placed in juxtaposition to the piece to be tested. The amount of air which leaks or is sioning purposes. - with these and other obìects view which emittedírom openings in the nozzle, and through 10 will become apparent as the speciilcation pro the opening remaining betweenrthe piece to be ceeds, the ‘embodiments of my invention will be checked and the nozzle, is a measure of the di mension. Such a testing mechanism- is shown best understood'by reference to the following specification and claims and the illustrations in the accompanying drawing, in which: ‘ and described in a copending application, Ser. Figure 1 is a transverse sectional view through No. 408,047, tiled August 23, 1941, in the name 15 of Fred Rupley, and entitled “Air gauge." In a device embodying my invention. Figure 2 is an enlarged partial sectional View that instance, however, the nozzle or projecting taken substantially on lines 2-2 of Figure 1. portion having the openings therein through Figure 3 is an enlarged sectional view showing which air is caused to leak is rigidly secured to 20A the engaging tip Aof the measuring nozzle. a casting' upon »which the meter which measures Referring new more specifically to the draw the pressure within the housing is mounted. In other Words, this mechanism is designed to be ing, a casing or housing‘Z is provided which has I a substantially center bore I extending for a piece to be tested there then carried or brought considerable distance through the center there to the bench, and if the dimension to be checked 25 of.l The outer end of this -bore is enlarged as is of internal diameter, placed over the test noz shown at 6 in Figure 1 and the interior portion placed upon -a bench or other support and the ` ' zle and the reading on the dial checked. thereof is threaded as shown at 8 to carry a noz 'I'here are many instances in which it would zle I0 which may be ‘screw-threaded into this be more desirable to be ‘able to move the test noz hollow portion and which in turn has a central 30 zle or bring it to the means to be tested or checked. bore I2 therein. The ‘in-Ward or rear >portion of such, for example, _as la large ,casting in which the internal bore I2 is larger than the outer por there are openings of a certain diameter and in ' tion and threaded as shown at I4. A longitudi that case it would be physically impossible to nal shaft I6 extends through the central open carry the casting to the relatively ilxed checking ing I2 in the nozzle III and also back through the 35 central bore lof the main casing 2 which is in Also lin the previous case the openings from alignment therewith. _Slightly back from the which the‘air is permitted to escape are brought forward end of this shaft I6 is Va iixed collar `I8. . nozzle. ' ,f - into close proximity with the part to be tested A cylindrical slidablecollar 20 havingiits exterior and air escapes between the test part and the surface threaded is mounted on the approximate nozzle. ‘Under certain circumstances it would be 40 center of the shaftA Mi and screwed into the advisable not to have the air flowing at this threaded opening Il in the nozzle to compress checking point but rather have the checking point between its inner surface and the forward collar control the ilow _of air at a remote position not I8 a compression spring 22 which therefore biases in actual contact with the test part. the shaft I6 toward its outward position, which 45 It is,` therefore, an object of my invention to in Figure 1 is toward the right. provide a portable testing or checking nozzle. The outer end of the shaft I6 has a tapered or It is a further object of my invention to pro conical nose 24 which is adapted to engage a pair vide a portable checking nozzle which may be of ball bearings 26 and 28 supported ina trans Y connected to a remote indicating means. verse slot 30 in the end of the nozzle. Asbest It is a further object of my invention to pro 50 shown in Figure 3, a portion of this transverse- ' Vide' a checking nozzle in which the variable fluid escape port is remotely controlled. a a slot 30 is )curved as `shown at 32 on each side to prevent these balls from being ejected from this It isa further object of my `invention to pro - slot when the shaft I6. is forced tothe right. videv a portable checking nozzle in |which the „u They are therefore maintained securely against variable opening through which the iiuid es 2,369,319 2 air or ñuid therefore _ñows- within the this portion 32 andagainst the front'portion of the slot. » part and any errors that might be _introduced into the reading by excess -air escaping through rough spots or abnormal conditions is avoided. The « A transverse channel 34 is provided in the ap proximate center of the casing 2 and intersects the bore 4 which carries the rear end of, the 5 fluid or air escaping through vent 34 is directly proportional to the exact dimension across the reciprocatory shaft I6. This `sh'aft I6 has a outer surface of the two balls 26 and 28. Any diametrical opening 36 therein having a diameter abnormal conditions may be measured by rotat smaller than the transverse duct 34 and in rest ing the test unit within the bore being measured position substantially in alignment therewith. Therefore as the shaft I6 is reciprocated, the two 10 and if any variation in the reading of the gauge isl observed) the bore is not truly circular. openings will move out of alignment and vary the flow of air or other iiuid through this duct 34, 1. In a portable gauging device, a casing, depending upon the position of the shaft I6. longitudinally reciprocable means within the These two openings therefore by their amount of eccentricity- act as a. valve to control the flow of 16 casing, said casing and reciprocable means hav ing alignable openings for ñuid 4flow there fluid therethrough. e through whereby any relative motion between In the rear portion of the casing 2 is an open them causes a -valve action to~ alter said ñuid ñow and radially movable means in said casing to cause reciprocation of the longitudinal means. the opposite end of- which may be connected to 2. In a. portable gauging device, a casing, the indicating gauging means (not shown). This' 20 ing 38 to which it is intended to secure one end of a source of fluid pressure such as an air hose, opening 381s connected to a second transverse longitudinally duct 40 which-in turn is connected to a longi within the casing, said casing and reciprocable reciprocable means mounted tudinal duct 42 which terminates in the trans verse, duct 34 formerly described. A series of therethrough whereby `any relative motion ~be means having alignable openings for ñuid flow ' threaded cap screws 44, 46 and,” are provided 25 tween them causes a valve action to control said in the ends of these ducts to close the same, .permitting access'cfor cleaning if necessary. One side of the reciprocable shaft I6 has a >keyway or flattened portion 50 cut therein into which projects a pin 52 threadedly secured in the cas ñuid iìow and radially movable means carried by ' the casing extending beyond the surface _thereof adapted to engage surfaces to _be gauged, 30 ing 2 to act as a lock to prevent rotation of radial movement of which causes reciprocation of the reciprocable means. ' ’ 3. In a portable gauging device, an elongated cylindrical casing having an axial opening there the reciprocable shaft and to act- as a limit stop through for a substantial portion of its length for movement. in the axial directions. intersected by a transverse opening, a recipro Therefore in the operation of this device the opening 38 is connected to the ilexible hose of 35 cable member carried> in the opening and having an opening therethrough which is adapted to ‘ any desired length, which, asfbefore stated,4 ex tends to the actual gauge -or pressure indicator and the fluid pressure applied. The nozzle I0 is register with the transverse opening in the cas ing and radially movable means to cause said then inserted into the opening which it is desired 40 means to reciprocate and vary the `registering to check in the same manner that a plug gauge would be used, which action causes the two lballs 26 and 28 to be forced inwardly, which in turn causes the shaft I6 to be pushed to the rear or toward the left. This moves the opening 36 out of alignment with the opening 34 and therefore reduces thesize of the opening through whichv the air can flow along the pathshown 'by the arrows. This is illustrated by the dotted line ' opening area. 4. In gauging means, an elongated casing having a longitudinal bore therethrough for- a substantial portion of its length intersected by a transverse’bore, said longitudinal bore being , of different diameters,. a. hollow nose piece secured in the longitudinal bore, a reciprocable shaft carried by the longitudianl bore and the - nose, said shaft having an opening therethrough position in Figure 2. Thus the smaller the diam adapted to align with thetransverse casing bore eter the more the balls 26 and 28 will be forced 50 whereby the two act as a valve, means for ap inwardly and the farther the shaft II6 will be plying fluid pressure tothe transverse bore and forced to the left to cutoff air from escaping means to reciprocate the shaft in accordance through duct 34. The actual position of the with a size to be gauged. .x balls> 26 and 28 within the diameter is not im 5. In gauging means, an elongated casing portant, it only being necessary to set the gaug 55 having a longitudinal bore therethrough for a ing means or indicator to a definite position substantial portion of its length intersected by initially before gauging a series orf pieces of the a transverse bore, said longitudinal bore being same configuration -or dimension. Then if by of different diameters, a hollow nose piece inserting the nozzle into the openings being secured in the longitudinal bore, a reciprocable vchecked the indicating needle comes within co shaft carried by the longitudinalbore and the limitationsV of variation from the original mark, nose, said shaft having an opening therethrough the piece is acceptable. . adapted to align with the transverse casing bore For different diameters of course different whereby the two act as a valve, means for apply nozzles would have to be inserted into the end ing fluid pressure to the transverse bore, resilient of the casing 2. The length of the end> of the biasing means to bias the shafttoward one ex nozzle o-f course would also vary,.depending upon tremity and means acting to compress the bias-. the depth of the opening. whìchit is necessary ing means to reciprocate the shaft movable in to check. It is desired to point out that in this construction- the fluid does not leak or escape ~ accordance with a dimension to be measured to the atmosphere at a location between the mounted in the nose piece. nozzle andthe part being gauged as in prior apparatus, but rathe1` through a. vent in the cas ing 2, the flow through which is controlled through the position of shaìft I6 as determined ' substantial portion of 'its length intersected b-y 6. In gauging means, an 'elongated casing having a longitudinal bore therethrough for a a transverse bore, said longitudinalfbore being by the floating ball location within the part. No 76 of diiïerent diameters, a hollow nose piece » aseasia secured in the longitudinal bore, a reciprocable shaft carried by the longitudinal bore and the nose, said shaft having an opening therethrough adapted to align with the transverse casing bore whereby the two act as a valve, means for ap plying :tluid pressure to the transverse bore, l biasing means to bias said shaft toward one extremity, radially movable members mounted in the nose adjacent the shaft end, Vsaid latter having a tapered section whereby upon radial movement of the means the shaft will be re ciprocated. ' ` 7. In gauging means, an elongated casing having a longitudinal bore therethrough for a 3 of diiîerent diameters, a hollow nose piece secured in the longitudinal bore, a .reciprocable shaft carried by the longitudinal bore and the nose, said shaft having an opening therethrough adapted to align with the transverse casing bore whereby the two act as a. valve. means for apply ing fluid pressure to the transverse bore, bias- Y ing means to bias said shaft toward one ex-„ tremity, radially movable members mounted _in the nose adjacent the shaft end, said latter Vhav ing a tapered section whereby upon radial move ment of the means the shaft will be reciprocated, said radially movable members having a por tion extending beyond the casing surface to substantial portion of its length intersected by 15 directly engage the surface to be measured. a transverse bore, said longitudinal bore being PAUL TÍ. SMI'I'H.