US 2491910 A
Description (OCR text may contain errors)
20, 1949 W, @,SCHlNsKE 2,491,910
'ELECTRO MARKER Filed July 25.41945 l 4f jay] MHT-f4 3 Sheets-Sheet 1 Dec. 20, 1949` w. G.- scHlNsKE 2,491,910 ELECTRO MARKER Filed July 2.5, 1945 4 v s sheets-sheet 2 Dec. 20, 1949 w. G. scHlNsKE 2,491,910
ELECTRO MARKER' Filed July 25, 1945 3 Sheets-Sheet 3 of metal,
Patented Dec. 20, 1949 UNITED STATES PATENT QFF'I'CE ELECTRO MARKERv William G.,Schinsl e, Sycamore, Ill., assigner, by mesne assignments, to Ideal Industries, Inc., Sycamore, ill., a corporation of Delaware Application July 25, 1945,- Serial No. 607,029;
This invention` relates to an electric marker and particularly to a marker which acts by means 4of an electric current and a stencil or equivalent device to mark, various metal and plated or metal clad surfaces.
It has forone object to provide a device by means of which markings be rep-resented from a stencil electrically.
It has ior another object to provide rneans metal 'for marking electrically upon metal.
It has for another object to provide a con,u venient electrical set by means of which a given marking may be readily and rapidly reproduced many times upon different pieces of metal.
It has for anoth r object to provide a coinpact and convenient set for electrically marking inv which everything necessary but source of `electrical current is included in a single conven- `one suitable electrical circuit for the operation of the device.
Like parts are indicated by like symbols .throughout the speciiication and drawings.
In the particular forni here shown thedevice is: enclosed in a housing which. although it may be made of any material is convenient-y made l provided with feet portions il which may be It is closed by one end wall t through which openings may be formed and the openings if present may be provided with lcuvres` ll. A4 subdivision or dividing wall 5 separates that :portion of the housing which includes a part of the electrical means from the remainder of the housing. A drawer may be positioned in the other side of the housing and includes a boti tom member t, sides 'l and ends t. The handle 9 may be secured to the exposed end portions i3 if desired. That portion ci the main housing in which the drawer is positioned is provided with an end plate itl which is cut away as shown The housing includes a base member' Iii particularly in Figure 2; to` accommodate the drawerA and the-drawer end` 3'.; The drawer has no, function in connection with the operation of the device but is primarily a inea-ns for storing equipment whichis toY be used in connection with the operationv of the-device. This equipment may include chemical solutions, stencils completed or uncut, rags and anything else convenient for use in' operating the` device.
If desired a cover.- Il suitably-shaped and provided with a handle. l2. may be positioned .in the main housing and, itl may be attached tothe housing if desired by any sort of attachment. As shown a broken, hinge construction provided so thatthe cover may beremoved entirely fromy the deviceif desired. Thebrolien hinge constrnotion`` includes hingedmembers or eyelets i3 fixed on aside wall ifliof the housing and hinged.- pins l5r xedf on the. cover il. When the cover is, to be put inY place itis moved so that the hingedipins iengage the hinged merobers I3. When` it is to be removed it is -moved in the opposite direction. One or more latch members l5. are mounted on the main housing Wall il. and mating latch. parts iiil are mounted on the cover Il. When4 thecover is in closed or dottedlinepositiono-f Figure Zthe latch` parts i8 penetrate thelatchA partsV Iii andthe cover may beheld closedby keepers i Siinovably mounted. adjacent the4 latch. parts. I. It is to be un derstood` that` many other` types` and arrangements of housingsmightbe usedand the invention so far as itsgeneral, electricall operation is concerned-is notV limited. to` nor dependent upon any particular housing form.
Upon ledge members or otherv suitable supports 2B, within the housing portion bounded by the partition 5, the endwall il) and the side walls lll and ll'ismountecla supporting partition il of insulating material. Positioned upon this insulating material. are portions of sponge rubber or equivalent material'ZZ andupon this is mounted an electro conductive plate 23. This as -ShOWlLll Fgure, is notchedasat 2s' and is held adjustablyy in positionv by screws 25V which enn gagetlle insulatingmmber 2l. Fixed to plate v23 arewallmembers which denne a depression or, opentopvesseli 256' anda box-like frame inenber 2T is fixed on the plate 2-3 within the walls 26. This box-like, member is perforated as at 28andis arranged to receivean absorptive bei,` such as ak sponge` 29. The box-like frame member 21, isplovided with al perforated cover 30.` Whnthedevice is in usean absorptive cloth or sinjiilar,'rnerpberv 3l is positioned over the perforated cover and a stencil or comparable member 32 is positioned over the cloth. As shown in Fig. 4 the marginal portions of the wicklike cloth 3l depend downwardly from the plane of the cover 30 into the vessel 26.
A cover 33 formed of insulating material is hinged as at 34 to the partition member 5. The hinged cover may include a frame member or frame parts 34 upon which is mounted a latched part 35 which engages a latch part 35 mounted on the housing member l0. By this means the cover is mounted for ready opening but is held in a closed position by the latches 35 and 35. A handle or lifting member 31 may be provided if desired for raising the cover portion 33.
A bar 33 is fixed on the member 33 and may be of T-shaped cross section as shown in Figure 4. A second bar 39 is positioned to engage the bar 38 and to be slidable upon it. A set screw 4l) is mounted in the bar 39 and by means of the bar may be locked in adjusted position on the bar 33. The bar 39 is also grooved as at 4| to receive a third bar 42 which engages the grooves and is held vin adjusted position by a set screw 43. From lFigure l it will be seen that the bar 39 is at right angles to the bar 38 and the bar 42 is at right angles to the bar 39 and said bars overlie the stencil 32 whereby they may be positioned to engage and hold articles to be etched in rm electrical contact with the stencil.
It will be convenient to describe the schematic diagram of Figure 5 before describing the electrical parts as they appear in elevation in the other figures. Electrical current is provided for the device from any suitable device and includes a plug 45 which provides connection to primary cords or conductors 46 and 41. The conductor 45 leads to a rheostat 48 having a handle 49 for adjustment. A conductor 50 leads from the rheostat to a transformer 5I which includes a primary winding 52 and a secondary winding 53. The conductor 41 leads from the plug 415 to a slide switch 54. Conductors 55 and 5E lead from the slide switch to a push button or push switch 51. The conductor 58 leads from the switch assembly to the primary winding or coil 52.
A conductor 55 leads from the secondary coil or winding 53 to a connector 63 which is joined to a jack 5I which latter may be connected to the bar 38 as shown in Figure 1. This bar may be provided with more than one point for receiving the jack 5I. A conductor 62 connects the connector 50 with the jack 6l.
A conductor 63 leads from the secondary coil 53 to a telltale light 64. The circuit through the lament of this light is completed by a conductor 35. A conductor 66 leads from the light to an ammeter 5i. A conductor 68 leads from the ammeter to a pair of jacks 69 and 10. A connector 1| may be connected with either of the jacks and through a conductor 12 is grounded on the plate 23.
Although I have shown an operative form of my invention, it will be recognized that many changes in the form, shape and arrangement of parts can be made without departing from the spirit of the invention, andmy showing is therefore to be taken as, in a sense, diagrammatic.
` The use and operation of this invention are as follows:
With the device in the form shown, a stencil is cut with the inscription to be marked arranged for marking and a solution of a suitable uid is put into the pan formed by the walls 25. This moistens the sponge 29 and correspondingly meistens the stencil 32, as well as the cloth or wick-like member 3l and the depending marginal portions thereof. The stencil is uppermost. The clock or wick-like member 3| is beneath and in contact with the stencil and moisture from the sponge 29 passes through the perforations in the member 30 to assure adequate moistening not only of the stencil but of the member which is to be marked.
Such a member is shown in Figures 1 and 2 and by way of illustration the legend A. B. C. Co. is shown on the stencil. The plug 45 is connected with a source of suitable electric current and the handle 49 of the rheostat is moved to the desired point to give current of the desired strength.
The jack 52 is connected to the bar 38 and as shown in Figure e, a conductor 'l2 is connected to the base plate 23. The circuit is thus connected through the conductors and members described and through the solution in the sponge 23 and the wick 3i. That portion of the stencil which has not been cut does not permit fluid to pass through it, and only the portion of the stencil which has been cut permits fluid to pass through it and to come into contact with the member which is to be marked.
With the parts in the position shown in Figure l if only one member is to be marked, it may be convenient to operate the momentary switch 5l to complete the circuit and to cause current to now and thus the legend on the stencil is etched or marked upon the metallic member in contact with the stencil. Where a great many members are to be marked identically, this may be done rapidly by adjusting the rheostat suitably and by leaving the switch 54 on for an extended period. When that is done, the metal members for marking are merely placed, one after the other, rapidly in contact with the stencil and in contact with the member 42. The member 42 is adjustable, as is also the member 39, and these members are conductive and thus conduct current to the metal part which is being marked. They serve, oi course, to place and center that member.
As shown in Figure 3, the members 39 and 42 may be either omitted or disregarded and the jack 5l may be touched directly upon the member being marked.
For most purposes the time required for a satisfactory marking is very short. However, if a longer time is necessary, the switch 54 is left on and the member to be marked is held in contact with the stencil and with the conductors, for a longer time. Also, the current may be increased as necessary by adjusting the rheostat 48 by means of the handle 43.
The telltale light 54 indicates whether or not the current is on and a marking is being made.
The entire assembly is complete in itself and the drawer 'i furnishes a storage capacity for stencils, etching iluid, which may be calcium chloride, and a suitable fluid for removing the calcium chloride from a part which has been marked. Necessary adjusting tools and spare parts may also be kept in the drawer 1. Thus the device is a unit containing ail necessary structural and electrical parts and all necessary parts for operation, adjustment and repair.
In combination in an electric etcher, an electrically conducting, open top vessel adapted to contain an etching solution, a liquid absorptive member disposed within said vessel, a frame member surrounding said liquid absorptive member within said vessel, and provided with a pers forated cover in contact with said liquid absorptive member, said cover providing a support for articles to be etched, a liquid absorptive sheet overlying said perforated cover and including wicking portions depending into said vessel, a generally liquid impervious stencil member havlng liquid pervious indicia cut therein disposed upon said liquid absorptive sheet, an insulating cover for the open top of said vessel movably mounted with respect thereto and having an aperture through which the stencil member is exposed when said insulating cover is in closed position, electrically conducting article-engaging and positioning means mounted on the insulating cover, means for adjustably mounting said articleengaging and positioning means on the insulating cover in overlying relation to said aperture for engaging articles to be etched and for holding them in firm electrical contact with said stencil when the cover is in closed position, and electrical connection means connected respectively to said article-engaging and positioning means and to said vessel and adapted for connection to a source of electric potential.
WILLIAM G. SCHINSKE.
REFERENCES CITED The following references are of record in the le of this patent:
UNITED STATES PATENTS 10 Number Name Date 1,465,616 Sculthorp Aug. 21, 1923 1,556,752 Blake Oct. 13, 1925 2,108,700 Adey Feb. 15, 1938 15 FOREIGN PATENTS Number Country Date 551,771 Great Britain Mar. 9, 1943 OTHER REFERENCES 20 "Amateur Craftsmans Cyclopedia, page 301,
published by Grosset 8a Dunlap, Copyright 1.937 by Popular Science Publishing Co. Inc.