US2496313A - Apparatus for checking the work of arc welders - Google Patents

Description

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Kluun-TIFF R. SARAZIN APPARATUS FOR CHECKING THE WORK OF ARC WELDERS Filed March 3l, 1941 zmwm HH Hill H Il HIH Rgl Patented Feb. 7, ,1950

f'APPABATUSFORCHECKING THE WORK .0F y.ARC vWELDERS "Roberti"SaraznQNeilly-sur#SeinegFrance; vested iny the; Attorney' General vof the" Unitedy States .f-'eADDlication March. 31, 1941, Serial No.. 386,196 In France August,v 3,1939

flnzhisflrench-Patent No."''l59.,150 of October122, 1932nthe .applicant .describeda :devicesforfxchecking theaactivity. foffoperators zand. znnparticular of welderseby recordingthework eifectedzduring .the day andfcounting the electrodes.

'Said device thus enables, for agiyen'operation, .the variousgelements to be. obtained lwhich constitutesthe vcostwprice, of xa'zweld vand also ther idiligence :of thezoperatorl toebe characterized.

However, the device;describedzinzthe aforesaid French-.patent involves;aratherfdelicate mechanicaliarrangement; the upkeep of which may notvbe very .well effected by the normalzwelding shop.

ilThepresent inventionfproyides axnovel means for Apermanently checkingatheuwork -ofythe'foperatorsiandx consists, .ini'principla r4in .using for; the printing tof; recording documents whichiare :preparedfor this purpose, the 1luminous or non-luminous ray-s ,directlymrindirectlyremittedby the working tool; this one, 'zin the.. secondv case, operates an'. auxiliary member '.whichzemitsthe necessary-rays for, operatingthef apparatus.

f In the case.oflthearcweldeiglforfexample,v the rays emittedk .by ther source-:are very lactinic .and act tveryfintensely.on photographic papers or even on sensitized papers suchv as those whichv are .used for*reproducingdrawings.

In this practical applicationof. theinvention, usefmay be .madevoffa recording-.paperwhich is partly .or completely covered with :e an f emulsion may: ybe :adopteds during -the time: of @supervision .l

of a furnace, yfor example, .if ,itis desi-redt()l check the operator :entrusted-therewith.

yThe.-,advantage-.can be seen whichyis offered by the.; possibility.` of using yslightlysensitive;` papers which z are cheap andeasyztoqdevelop. They -require afairly longeexposurezand iftheluminous source yhas' to-be .modied,: itis an easy'matter to provide acoloured glass-:screen whichl will-:pron portion :the4 luminousfpower.requiredifor,satisfactory printing. y

This recordingprocess therefore. leads i to ensu1ing11the translation tof sa'y sensitized paperyin frontxfof `an opening/.Whichi-may moreover. be provided xwthx-a frudimentaryiflens/ By moving the sheet yof'. pap erin .front vofi the opening; .ias-1 a function ofthe time, itwill betpossibleiito"represent graphically the workcof; thetoperator.

After the days Work has been effected, thefoperator hands :his:l diag-ram :to the :foreman for. to thermen ,inf charge of .production ;fby simply, passing fthis. document .in a suitable developer, the variousfactors showing howthe time has been used ;will=beconf1e` apparent.

-A,quick count of the lines printed on ,thepapen representing the fusion of each electrode,l will show the number of ,f .electrodes actually. used if on the other hand,rthemovement vof the paper hasbeen :effectedas a function of ,the time.. the responsible foreman Willbe able to check theldili- -gence-.at hisfwork, in one Word the efficiency, .of eachroperator.

The. printed paper maybe filed so as to 'form a-knd of ...time register which may be referred to,-. when identical work `is .being effected.

Various embodiments may be contemplated. However, rbywwayf-demonstration, two chief. emlcodiments .have `been .shown .whichparticularly referto the case of `arc Welders.

It is known...that,this Weldergenerally holds in his hand,`on theorie hand, a vprotecting screen, on the other..hand -the. holder providedwlth .the electrode which, lay-melting, will :form the supply of metal :forthe weld.

,The-two `movements are automatically combined at .the instantwhen the .welding operation is effected. The operator4 normally holds his electrode-,holderinthe right hand, and in .the other, heztakesthehandleof the screenwhich is toprotect him-fromnthe rays.

r:Inthe-fmost g enera1f;case, the Welder veffects these two movements almost simultaneously and, at. .the 'instantwhen he strikes the are, he brings thescreenf'inffront of his eyes. Thus, for each new ,electrodethe operator will take .hold of .his screenand this movement may be used toV obtain a displacement of the recording paper;the latten-.may begplaced .inl a rudimentary camera mountedfon the faceof Athe screen for example.

.y `In Athe Iaccompanying' drawing, two embodiments-.have been. shown of aclevicepossessing ,the above features:

lfEig. 1. is. aback view,

.Eg.. 2-is. a View in Vvertical sectionz along the yplane:projected on 2-1-2in Fig. 1,

vF ig...3 is .a view, .in horizontal section along theplaneprojectedfond- 3 in Fig. l, ofagrst embodiment, of, the device;

Fgnaisa,specimen of recorded diagram ob" tainedrwith ...the .device a Eig isa .View in dametral sectionof .another Asmbodirnent of the apparatus;

Rigid is a .recorded .diagram ccrrespondingto sadrapparatus.

I. In, Eig. La'lthewrecording. papenl ,isormedf by ankind ,of. rrectaryugular. card1 covered, fon .its tface exposed to the arc, with an emulsion of a product -which is sensitive to the rays of the arc. The camera is, for example, represented by the simple slideway ia which is applied against the inner face of the screen E provided with its usual window F; on the iront face of the slideway, which is exposed towards the arc, there is provided a slit 2 which is `of the required length and height Ifor obtaining the printing of a line.

In front of the slit 2, the possibility has been provided of placing a. coloured screen 3, in such a manner that only a source of light Which is as powerful as an electric arc can affect the paper. The coloured screen is so chosen that the darkest shade of the line requires an exposure corresponding to the time of melting of the electrode used; it will therefore be possible to adapt the screen to the intensity of the l.source of light, that is to say to the diameter of the electrode.

The apparatus is completed by a very simple mechanical system comprising, for example, an actuating drum i covered `for example with rubber, which moves the card a space longitudinally after each electrode, so that the apparatus is ready lfor further use.

Each time the operator takes hold of the screen again, he actuates the mechanical system, nfor example by means of a small ratchet device 5 actuated by the small spindle secured to a blade 1 which forms a lever and is Iplaced against the handle 8 of the screen; by grasping the handle of the screen. the operator cannot fail to press the blade 'i and the latter feeds the recording card a predetermined amount, then returns backwards.

In the case in which the operator uses a helmet covering his head, he is in the necessity of ither moving it backwards, or opening it in order to see and pick up a fresh electrode; the corresponding movement will in this case be -used for moving the card as has been described.

rIhe system thus obtained is the simplest. After treat-ment of the sensitized paper, it produces a card according to Fig. 4 bearing a Series oi lines, the intensity of shade of 'which -me-asures the time of exposure, that is to say the time of melting, it being observed that with the same screen and for given conditions of operation, the successive lines should be similar. Said card may bear complementary indications concerning the work.

The second device, which is illustrated in Figs. 5 and 6, shows a construction oi a different design but having the advantage of recording the elementary times of work as a function of the time 0f presence in the workshop.

The sheet of paper is shaped like a disc 9 mounted on the plate it of a clock motor Ii which rotates it a complete revolution in a period of time chosen being the most suitable for the checking.

The whole arrangement is enclosed in a casing I2 which carries the slit lZa; for some sources of light, it may be advantageous to replace the slit by a suitable small lens which receives the rays emitted by the source and directs them in a `parallel or convergent beam to produce a line or else to determine a point. Casing i2 is mounted on shield E which, in turn, has window F therein through which the Welder may observe his Work.

Assuming that the rotation of the disc is effected in twelve hours, which covers a .days Work with interruptions, it will be seen that the foreman will be aware of all the incidents of the day with its periods of work and its stoppages. As

regards the arc Welder, for example, the fusion of the electrodes will be recorded, with the device according to Fig. 5, in successive bars which are directed along elements that may be assimilated to radii.

It will be seen from the explanation that the apparatus can be lused for checking all kinds of operations. For this purpose, it would be completed by various electrical or mechanical members which exist in the present state of the art and do not themselves fall within the scope of the present invention.

What I claim as my invention vand desire to secure by Letters Patent is:

1. In combination, a substantially concavoconvex arc welders shield having an opening therein through which light rays pass, guide members on each side of the opening and on the concave surface of the shield for supporting a light sensitive record receiving strip over said opening in vtace to face position relative to the concave shield surface, 'a handle for said shield, and strip displacing means extending alongside said handle whereby the operators hand can simultaneously grasp the handle and operate the displacing means.

2. In combination with a shield ior use in arc welding, furnace operations and the like, means for mounting a light-sensitive record receiving member on said shield, means for exposing a comparati ely small area of said mounted member to light rays emanating from a distant source such an electric arc or a furnace, viewing means carried by the shield and separate from the exposing means for permitting the light rays from said source to pass through said shield, the positioning of the shield by the operator for viewing the light source through said viewing means simultaneously positioning said exposure means to receive light from said source, means mounted on said shield for displacing said member relative to said exposure means, a handle extending from said shield, and means connected to said displacing means and operatively related to said handle whereby the combined simultaneous operation of the handle and of said means connected to the displacing means will operate the displacing means.

3. In combination with an opaque shield having a translucent sight window therein and adapted for use in arc welding, furnace operations, and the like, means for mounting a lightsensitive record receiving member on said shield, means mounted on said shield in spaced relation to said window and laterally of the line of sight through the latter for exposing a comparatively small area oi said mounted member to light rays emanating from a distant source such as an electric arc or furnace, said window and said exposing means facing in substantially the same direction from the shield face, the positioning of the shield by an operator for viewing the light source through said window simultaneously positioning said exposure means to receive light from said source, means mounted on said shield for displacing said member relative to said exposure means, a handle extending from said shield, and means connected to said displacing means and operatively related to said handle whereby the combined simultaneous operation of the handle and of said means connected to the displacing means will operate the displacing means.

4. In combination with a shield for use in arc welding, furnace operations and the like, means for mounting a light-sensitive record receiving member on said shield, means for exposing a comparatively small area of said mounted member to light rays emanating from a distant source such as an electric arc or a furnace, viewing means carried by the shield and separate from the exposing means for permitting the light rays from said source to pass through said shield, the positioning of the shield by the operator for viewing the light source through said Viewing means simultaneously positioning said exposure means to receive light from said source, intermittently operable means mounted on said shield for displacing said member relative to said eX- posure means, a handle extending from said shield, and means connected to said displacing means and operatively related to said handle whereby the combined simultaneous operation of the handle and of said means connected tothe displacing means will operate the displacing means.

5. In combination with a substantially concavoconvex shield having an opening therein and adapted for use in arc Welding, furnace operations, and the like, guide members on the concave surface of the shield for supporting a light sensitive record receiving strip over the opening in face to face position with the shield surface to permit a surface area of said strip to be exposed to light rays emanating from a distant source such as an electric arc or furnace, a sight opening in said shield separate from said first opening, the longitudinal axes of said sight opening and said first-named opening being substantially parallel whereby the positioning of the shield by the operator for viewing the light source through the sight opening will simultaneously position the rst opening for receiving the light from said source, a handle for said shield, and means mounted on said shield for displacing said strip relative to the rst opening, said strip displacing means including an intermittently operable one-way drive, and means connected to said drive and extending alongside said handle whereby the operators hand cansimultaneously grasp the handle and operate the displacing means.

ROBERT SARAZDT.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date Re. 14,821 Chubb Mar. 23, 1920 1,044,835 Wattles Nov. 19, 1912 1,033,773 Brewer July 23, 1912 1,552,450 Roach Sept. 8, 1925 1,752,071 Doyle Mar. 25, 1930 1,828,328 Legg Oct. 20, 1931 1,938,499 Ragsdale Dec. 5, 1933 1,967,895 Marvin July 24, 1934 1,994,103 Huey Mar. 12, 1935 2,099,965 Sarazin Nov. 23, 1937 2,132,520 Taylor et al. Oct. 11, 1938 2,246,005 Rich June 17, 1941 2,259,680 Caudell Oct. 21, 1941 FOREIGN PATENTS Number Country Date 422,410 France Jan. 19, 1911 7,522 Great Britain Mar. 31, 1913

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