US2436455A - Inking mechanism - Google Patents

Description

Feb. 24, 1948. F. w. sEYBoLD INKING MECHANISM Filedmarcn a, 1944 3 Sheets-Skiset 1 Feb. 24, 1948, F. w.v sEYBoLD I 2,436,455

INKING vlvl'rzcmml sM Filed March 8, 1944 3 Sheets-Sheet 2 Feb- 24, 1948 x A F. w. sEYB-OLD 2,436,455

INKING MECHANISM Filed Maron 8, 1944 s sheets-sheet 5 Patented Feb. 24, A1948 UNITED STATES PATENT (lFFIClE'l` INKING MECHANISM Frederick W. seniors, Westfield, N'. nassghoi to' American Type Fouhders, Incorporated, Eliza--l beth, N. J., a corporation of New Jersey Application March 8i, 1944, Serial No. 5251560 This invention relates to printing presses and the like and more particularly to inking mechansms or similar liquid distributing devices adapted to be used in connection with such presses.

The general object of the invention is the provision of a novel and improved device of the classk described for the efficient transfer and thorough mixing ofthe ink in the course of its passage from the reservoir or fountain to the printing form.` The embodiment ofthe invention, which has been selected for exemplary disclosure herein isnparticulary adapted for application to a bedand cylinder press, for example, the Well-known Kelly press.

The invention in its preferred embodiment contemplates the provision ,of a primary ductor roller arranged to oscillateto and from contact with the fountain roller and a second ductor rol`er a r ranged to` oscillate to and -from contact witnthe rst roller or ink drum of the usual train or" inking and distributing rollers adjacent the path of the form or printing plate. Between the two dlzctcr rollers there is disposed aset of continuously rotating workingrollrs which may include a vi bratory roller, for example, of the McKinley type, rIhis intermediate group ofrollers is adapted to be interino''diatelycontacted'by the ductor rollers and is designed' to thoroughly triturate or` out up the ink preparatory' to applying it tothe pyramidel system o'f inkingand districut'ng rollers; With this arrangement a particle of ink travels almost twice as farasiri the ordinary press of this type before it'eacliesits destination on the form; in' other' words', the'v inches of' distribution are morethan doubled.

Another feature'which char'a'cteriaes the invnltion resides in' the use of tle McKinley distributing roller in the intermediateset of rollers. This relieves the operator of the necessity of closely settng'the' fountain keys for maintaining'an even color, since the laterally" oscillating McKinley roller serves to spread the ink from theheavier areas tothe lean areas.

More particularl features of the invention illvolve the novel and adi/alltagecus l'r'leaus for mounting` the' two ducto'i" rollers toy swingr about the same pivot point, andio'r interrupting the movement ofthe'rollers whentlie impression is thrown oi, either automatically bythe detection` of the misfeeding'of' a sheet orpositively by mariual means under the" control of the operator;

A still: further object of the invention' is" the provision of' novel details of; construction' of the liquid transferring mechanism; such as there# 2 silient mounting of the ductor roller bearing bracketsto providesumcient cushioning ol c onq tact of the rollers with the fountain and liquid receiving drums or rollers, and to adapt theroller supports to the particular mounting and operation of the vinterrupter devices. ther Objects,and` features vQf novelty. wilt-.e apparentfrom the following specilication when read i Connectionuihihe ecompanyns altariings in which one embodiment of the invention is illustrated by way of example,

ilihdfawieg's. Figu're 1 is a fragmentary view in side ele" time Qf ,a bestand Cylinder ,Panties Press' to wel., my inventionhas been applied; parts of the pressf' frame beingr broken away forbetter illustration f certain' portions of4 the mechanism; Figures is a fifaghiohtaiyplah vievv' of uielhkl ing mechanism showing `the niounting's of the' ductor rollers at the near side of the Dress .as viewed in Figure 1; rjlgue 3 is a'. vertical sectional view throuh th bearingv brackets of one off the ductor rollers.,y taken substantially on line 3--3 of Figure 2;

Figure 4 is a horizontal sectional view takenon; lino' 4- 4 of Figure 3' and passing through oe of the brackets; ligure 5 is atrasverse vertical sectional view throughthe adjacent brackets taken substaritiafilyA on line 5-5 of Figure 3;

Figure' o is" a fragmentary hohohtal seol'orgi view t'hrllgllthe actuating shafts for the interlrupter lingers whichl are adapted to limit the oscilat'i'cn of the du'ctor rollers under certain cen.. unions. the view being faken' substantially oh lih 6"- 6 of Figure' v3; and Figure 7 is e fragihehtorv transverse sec'iohl view through the vibrating roller forming a port" of the ,intermediate set ofworkihg rollers.

A p raoh'ool embodiment ofthe invention has been illustrated ini the drawingsv accompanying the present specica'tion and will be describedl hr detail herein as applied to a Kelly press 6i' the" beu cylinder typesu'o'h as fory example" es' illustrated ih'ithe Kelly Patent 1,700,680 of Jahuory 29, 1929. The printing parts of this press and the ihk distributing' devices vvfillb reog nized and' thir functions clearly understoodv by thososkllleol ihl theA art. In' Figures i and 2 of' the drawings', thel malh' frame of the press designate-ahy tho reference huhirol l0' and lli will be seen that sido portions of this frame are extended upwardly as at' lfl to support the bear-5. ings l2 o f the" impression' cylindelrA shaft i3; The'v bedV of the' pressI (not shownl is' adapted tol rel ciprocate horizontally with the printing face of the form or plate in the plane indicated by the line X-X. A substantially conventional pyramidal bank of inking rollers is designated genorally by the reference numeral l and comprises one of the distributing rollers I1 and also with the transfer roller or drum 20. All of these rollers are driven by suitable or conventional means operatively connected with the power means for driving the press.

At the right hand end of the press as viewed in Figure 1 an inclined bracket 22 is providedV which serves to support the ink fountain 23 which comprises the end plates 24 and the fountain roller 25.

Upon each side frame of the main frame 16 of the press and at points intermediate the fountain roller 25 and the ink transfer drum or roller 20 are vthe supplemental side frames 26, the remote one of which is shown in Figure 1 of the drawings. These supplemental frames provide bearing support for a set 21 of intermediate working rollers and driving means therefor. The largest element of this set of rollers is the drum 3|) which is mounted upon a shaft 3l rotating in the frames 26 and two distributing rollers 32 and 33 are similarly rotatably mounted in the frames and are in continuous Vcontact with the drum 36. Also mounted in the frames 26 is the shaft 34 ofthe oscillatory distributing roller 35 which is preferably of the McKinley type. This roller is adapted to contact with the distributing rollers 32 and 33 and the contact pressure may are retained within the troughs by means of the latches 55 pivoted to their respective brackets as by means of the pins 56 and urged toward closed ,position by means of the springs 51 which are stretched between the ears 58 and the arms 59 on the latches. By these means the ductor rollers 56 and 52 may be readily detached from their ybearing brackets for renewal or access to other portions of the press.

It will be readily understood that the rocking of the shaft 45 causes the ductor rollers 50 and 52 to oscillate, the ductor 56 serving to transfer a quantity of ink from the fountain roller 25 to the drum 30, whereupon the ink is worked up by means of the rollers 32 and 33 and the oscillating McKinley roller 35. The ductor roller 52 transfers the worked ink from the drum 30 to the transfer roller' 20 from which it is carried to the form. During the passage from the fountain be regulated by suitable means controlled by theA thumb screw 36. A more or less diagrammatic showing of the McKinley roller will be seen in Figure 7 of the drawings, the shaft portion 36 of the roller being provided with the reversing grooves 31 adapted to be traversed by the crescent key 38 secured to the outer rotatable and reciprocatable working portion 40 of the roller. The construction of this roller forms no part of the present invention and is familiar to workers in this eld. The contact pressure of the peripheral portion of the roller 35 against the rollers 32 and 33 causes-it to rotate and to oscillate to and fro along its shaft.

Beneath the intermediate set 21 of working rollers, there is disposed a transverse rock shaft which is adapted to be oscillated about its axis by suitable means. for example a cam, driven by the press drive. The shaft 45 has bearings in the side frames of the press frame l0. There are secured to the shaft 45 adjacent each end thereof, the inner and outer roller supporting' brackets 46 and 41. It will be understood that the arrangement shown in Figure 2 is substantially'duplicated upon either side of the press and the two inner brackets 46 serve to support the'axle 48 of, a primary ductor roller 56 and the outer brackets 41 serve to support the axle 5l of another ductor roller 52. The ductor roller 5i) is adapted to oscillate between contact with the fountain roller 25 and the ink drum 3D of the intermediate set and the second ductor roller 52 is arranged to oscillate between the ink transfer roller or drum 20 and the ink working drum 30. Each of the brackets is provided with a forked or trough-like portion 54 which receive the ends of the shafts 48 and 5I and the shafts to the drum 20 the ink is thoroughly cut up and worked by the intermediate set of rollers and is also more thoroughly and evenly distributed from end to end of the rollers by means of the oscillatory roller 35. This arrangement relieves the operator of the necessity of making a very close or accurate setting of the keys of the fountain 23. Of course, for certain conditions of operation, the McKinley distributing roller may be removed .and one or the other distributing rollers 32 and 33 may be dispensed with, this providing added flexibility to the inking system.

The present invention also provides novel means for locking the ductor roll carrying brackets 46 and 41 to the rock shaft 45 and also provides resilient cushioning means ensuring resilient contact between the ductor rollers and the other ink carrying rollers with which they contact and providing resilient lost motion connections for cooperating with the interrupting devices to be described later. These features will now be described.

A sleeve 60' is disposed within a cylindrical bore 6| formed in each of the brackets 46 and 41 and surrounds the shaft 45. Each of the sleeves 60 is secantially bored as at 62 to receive the clamping pin 63 which is arcuately cut away at one side as atf64 to conform to the curvature of the shaft 45. The clamping pin 63 extends upwardly into an enlarged bore or well 65 in the bracket and is threaded to receive the internally threaded tubular portion 66 of the elongated nut 61 having a squared portion 68 for the application of a tool to rotate the same. The lower end of the tubular sleeve portion 66 of the nut 61 bears upon the shoulder 69 formed on the sleeve 66 adjacent the bore 62, and when tightened serves to draw the clamping pin 63 upwardly to grip the shaft 45. thus locking the sleeve 66 firmly to the rock shaft.

However, the bracket 46, 41 still has limited rotary movement with respect to the sleeve 60 to permit a certain amount of play or lost motion to allow for variations in the diameters of the mutually contacting rollers, and this lost motion is given a resiliency by means of the pairs of springs 10 and 1| These springs are disposed within a transverse bore 13 in each of the brackets, the bores being closed after insertion of the springs and their mounting elements by means of the plugs 15. Each of the springs 16 and 1l are seated centrally in the seating elements 16 and 11, these elements being provided with vertically cylindrical faces adapted to contact wtih the correspondingly shaped sides of the nut element 61. The spring seats 16 and 11 are centered sets cf brackets.

by vmeans of the studs or set screws 80 which are threaded through the walls of the brackets. These features are most clearly illustrated in Figures 3, 4, and 5 of the drawings. The opera-l tion will also be clearly perceived. When the ductor roller 5|) is brought into contact with the fountain roller 25, the bracket 46 will be stopped although the shaft 45 may continue to rock for a slight further distance. Then the extensible pin member 63, 61 which is rigid with the shaft 45 and sleeve |50, will press the spring seat 11 toward the right in Figure 3 compressing the spring 10, and exert resilient pressure on the ductor roller 50. At the same time the opposite spring stop or seating member 16 will remain in contact with the centering screws 80. Similarly upon contact of the ductor roller 50 with the drum 3o at the limit of its opposite movement, the bracket will be stopped before the shaft 45 and the pin 61 will compress the spring 10. An exactly 'similar operation will take place within the brackets of the other ductor roller, and provide resilient contact with its associated ink drums 20 and 30.

Stop means are provided for preventing contact of the ductor rollers 50 and 52 with their respective fountain and inking drums although the shaft 45 may continue to. oscillate. Such stop means may be automatic and controlled by interrupting -devices associated with sheet detectors on the press, or they may be manually operated in order to throw out the ductor rollers when de.- sired. Both types of stop or interrupter devices are provided by the present invention. A rock shaft |00 is suitably mounted preferably at a point beneath the fountain roller and has pinned to it, adjacent each end, pairs of stop fingers Illl, one finger of each of said pairs being adapted to be brought into the path of the abutment surface |02 on the ductor roller supporting brackets 46 or 41, upon rotation of the shaft Ill. In Figures. 1 and 3, the iin-gers |0| are shown in a position displaced' downwardly somewhat from the abutment faces |02, but it will be readily seen that upon retraction of the roller 50 from contact with the fountain roll 25 or upon slight movement of the ductor roll 52 toward the drum 20 and away from the drum 30 the stop fingers |0v| may be moved in a clockwise direction about the axis of\the shaft |00 into position where upon the next return of the brackets .they will abut the faces |02 and effectively limit .the movement of the doctor rollers in a clockiwise direction, and thus prevent the feeding of ink from the fountain rollerl 25 and also from the ink working drum 30. The rock shaft |00 is adapted to be operatively connected with suitable interrupter means on the press, as by means interrupter devices not shown but the nature of which will be clearly understood fromV an inspection of the Kelly patent: to which reference has been made.

For positively stopping one or more of the ductor rollers, manually operated means may be provided. In the illustrated embodiment. ofthe invention such means are shown as applied to the brackets'll carrying the primary ductor roller 5.0 only, but it is obvious that kthe principles of the invention may be extended to include both Upon the shaft |00, which ex-y tends from one Yside to the other of the press,

there is mounted a tubular sleeve H0 to the ends -of' which arev secured the-stop. fingers'` H l, as by -of the crank arm |04. which is xed to the shaft |00 and is connectedA by `means of the link |05 with l 6 means of 'the welds HI'. The operative ends 'of the ngers are adapted to abut the faces |02 of the brackets 46. l.An angled strap H2 is se cured to the under side of one of the fingers III as by means of the rivets H3, and a substantially vertical arm ||5 of the strap is provided at its upwardly extending end with a handle device IIB. This device consists of a tubular part ||1 fixed to the arm ||5 and provided with an opening for receiving the pin I I8. This pin passes through the opening and also'through'a registering opening in the arm ||5 and is surrounded by a coil spring ||9 which by abutting suitable shoulders formed upon the cylinder and the pin I|8 serves to urge the inner pointed end |20 of the pin ||8 toward engagement with one or the other of the sockets 4|22 or |23 which may be conveniently formed in the end plate 24 of the ink fountain v23. The knurled knob |25 is provided on the outer end of the pin l| I8 whereby it may be readily withdrawn from the sockets |22 and |23. The sockets or openings |22 and |23 are disposed at limiting points in the movement of the arm 5, and'it will be readily seen that when the pin ||8 is in engagement with the socket |22, the stop nger I|| will be dropped downwardly beyond the en'gagingfa'ce of the bracket into inoperative position.' When pin H8 is disposed in the socket |23, the operative end of the finger HSI will abut the face |02 of the bracketand block the contactof the primary ductor roller 50 with the fountain roller 25.- It will be readily observed 'that in Figure '1 of the drawings, the pin ||8 is slightly displaced from the socket |23 in a counterclockwise direction and the finger is similarly displaced from the abutment face |02".

" It will be understood that various changes and modifications may be made in the embodiment illustrated and described herein without departw ing from the scope of the invention as defined by the following claims.

Having thus'described the invention, what is claimed as new and desired to be secured by Letters Patent is:

l. In a printing press or a like machine, havin-g a supporting frame uponv which are mounted a liquid fountain and fountain roller, and a roller for receiving liquid to -be distributed; the combination of an intermediate set. of working rollers comprising a drum, a rider roller, and-L an axially reciprocatory roller bearing upon `said rider roller, a pai-r of 'swinging ductor rollers, one ladaptedv to oscillate between said. fountain `roller and` said :drum and the other to oscil'late lbetween said fdr-urn and said receiving roller, said duotor rollers being mounted in bearing rbrackets all' of which have .a.:common pivotal airis,- a common aotuating. shaft upon which said `brackets are' mounted, and resiliently yielding means indi,- vidually and directly 'connectingI said brackets to said shaft to cushion, the` ,con-tact of said ducter rollers with those rollers which they touch.

2. In a printing press or a ,liker machine, hav-v ing a. supporti-,ng frame upon. which are. mounted `a liquid fountain andv fountain rol-ler; and a4 roller for receiving liquid tobe distributed; vthe com binationof'an intermediate set, 'of working roll.- ers comprisinga drum a pair of rider rollers, and anaxialiy reciprocatory roller bearing upon said rider rollers, 'a pair of swinging .ductorrollers one adaptedf tov oscillate between said fountain rol-ler and said drum: and the other tovoscillate between vsaid drum. and said-1 receiving roller, said d-.uct'or ,rollers being mounted infcbearing brackets, :all of which have a. common pivoter tous.` a` common actuating shaft upon which; said brackets are mounted, resiliently.- yielding means vindividually and directly connectingsaid bracketstosaid shaft to Acushion the contact of sald-ductorrollers-with those rollers which they touch, and, ,m eans forV individually and directlyfobstructing said ductor rollers'for interrupting the-contactofsaid ductor rollers Withthose other rollers upon occasion.

3.; In a printing pressora like; machinahaving a; supporting frame upon which are mounted a liquid fountainv andA fountain Vvroller, and a. roller for receiving liquid to be distributedpthe combination of an intermediate set rof working rollers, a pair of swinging ductor rollers, one adapted to oseillate between saidv fountain rollerand one of said workingv rollers and thef'othenfto oscillate between one rotsaid working rollers and said receiving roller, and separate movable Astop abut, ments adapted to be brought into position to limit the swinging movement of `said -di'rctorrollers toward one of thejrollers with which they normally are broughtinto contact,` certain of said 'abutments being constructed and 'arrangedrfor manual actuation and othersfor automatic actuation as when the machine is to be stopped for reasons of safety.;

4. In a printing press or alike machine,` having a supporting frame upon which are mounted a liquid fountain and fountain roller, and a roller for receiving liquid to 'be distributed; the combination of an intermediate set of working rollers, a pair of swinging ductor rollers, one adapted to oscillate between said fountain roller and one of said working rollers and theother to oscillate between one of said working rollers and said receiving roller, and movable stop. abutments adapted simultaneously to be-brought into posi-J tion to limit theswingingsmovement of both of said ductor rollers toward one-of the rollers with which they normally are brought finto contact, means for automatically actuating said abutlments upon interruption Vof the bperation of the machine, another movable stop abutment adapted to be brought into position to limit the xswinging movement of the fountain. roller contacting ductor roller, and manually operable means for selectively actuating the last named abutment.

5. In a machine' of the class described, a supporting frame, a pair of ductor rollers rotatably and swingingly supported in said frame and adapted to transfer'l liquid from one point to another in the machine, bearing 'brackets rotatably supporting each end ofeach of said ductor rollers, the bearing brackets all having a common pivotal axis, the brackets at adjacent ends of the two'rollers overlapping, and a unitary stop device adapted to be brought into the paths of move- Vment of said brackets to limit Vtheir movement in the same direction.

6. In a machine of the class described, a supporting frame, a pair of ductor rollers rotatably and swingingly supported in said frame and adapted to transfer liquid .from one point to another in the machine, bearing brackets rotat- -ably supporting each end of each of said ductor rollers, the bearing bracketsall having a common pivotal axis, the brackets at adjacent ends of the two rollers overlapping, and .a unitary Vstop device adapted to be brought into the paths of movement of said brackets to limit their move- 'ment in the same direction, said ,device comprising a rock shaft parallel with said rollers and carrying fingers one opposite each of said brackets, and means for rocking saidv shaft to bring said lingers, into position ,to obstruct the brackets.

8 f7. In a machine of lthe-class described;a supporting frame, a pair of ductor rollers Vrotatably and swingingly supported in, said` frame and adapted to transfer liquid from one point to anv ets, .and a handle connected with saidv last named fingers and sleeve for rocking them to and from obstructingposition.

f 8. In a machine of the class described, a supporting frame, a pair of ductor rollers rotatably and Swingingly supported in said frame and adapted to transfer liquid from one point to another in the machine, a resilient mounting for a ductor roller or the like comprising a rock shaft, a pair of bearing brackets carried by said shaft adjacent each end of said roller and rotatably receiving said roller, a bore in Veach of said v,brackets extending approximately radially of said shafaa pin fixed to said shaft and extending through said bore, opposed springs seated in said 'bracket on opposite sides of said pin and adapted to bear thereagainst, whereby relative rotative `movement of said bracket to'said shaft is resiliently resisted'.

9. Ina device of the class described, a rotatable shaft, a bracket carrying said shaft,'means for securing said bracket to said shaft for resiliently cushioned driving movement, said meanscomprising a pin secured to said shaft and extending radiallyrtherefrom through an opening in said bracket Vwith some clearance, a pair of coil springs seated in said bracket on opposite sides of said pin and normally adapted to bear against opposite sides of the pin, centering stop means on the bracket adjacent the pin for preventing pressure of the springs on the pin beyond the central position in the direction of elongation of said springs.y

l0. In a device of the class described, a rotatrable shaft, a bracket carrying said shaft, means for securing 'said bracket to said shaft for resiliently cushioned driving movement, said means comprising the sleeve inserted between said shaft and said bracket and normally relatively rotatable with respect to both, a secantial opening through said sleeve into which a, portion of the periphery of said shaft projects, an opening through said 4bracket in substantial alignment with said secantial opening, an extensible operating pin passing with clearance through said bracket opening, fitting snugly Within said secantial opening in said sleeve, and having an arcuate surface fitting the projecting peripheral portion of said shaft, a portion of said pin braced against an abutment surface on said sleeve, whereby contraction of said pin will cause the arcuate portion Ato grip the shaft and lock the sleeve thereto, and

resilient means for centering said pin within the bracket opening whereby said bracket is resiliently urged to follow the rotative movement of said shaft in either direction.

l1. In a printing -press or a like machine, having, a supporting frame upon which are mounted a liquid fountain and fountain roller, and a roller for, receiving liquid to be distributed; the combination of an intermediate set of working rollers comprising a drum, a pair of rider rollers, and an axaly reciprocatory roller bearing upon said rider rollers, a pair of swinging ductor rollers, one adapted to oscillate between said fountain roller and said drum and the other to oscillate with others of said obstructing means for interruption of the ductor rollers as when other parts of the machine are stopped for reasons of safety.

12. In a printing press or a like machine, hav- Ving a supporting frame upon which are mounted a liquid fountain and fountain roller, and a roller for receiving liquid to be distributed; arockshaft, means for oscillating said rock shaft about its axis, a ductor roller adapted toloscillate between" said fountain roller and said receiving 'rollen-a pair of brackets carried by said rock shaftgand rotatably supporting said ductor roller, a resilient lost motion connection between at least y.oneyf said brackets and said rock shaft, and .a stop abutment adapted to be moved into the path voit movement of one of said brackets for preventing contact of said ductor rollers with one of the rollers with whichA it is adapted to be brought 35 into contact, said lost motion connection permitting continued rocking of said shaft during the interruption to the eiective operation of said ductor roller by the obstruct-ion of said bracket.

13. In a printing press or a like machine, an oscillating printing roller installation comprising, in combination, a rock shaft, a bearing bracket for said roller, gripping means for attachment to said shaft, said gripping means including an annulus surrounding said shaft, an opening extend-- ing secantially through said annulus and intersecting the circumference of said shaft, kan extensible pin having one part tting snugly Within said opening and having an arcuate surface vit- `ting the adjacent circumferential portion o'ffsaid 10 shaft, the other part of said pin abutting a. shoulder on said annulus,whereby contraction of said pin will cause said arcuate portion to grip the shaft and lock the pin andannulus thereto, means for contracting said pin, and means for connecting said pin tovsaid roller bracket, whereby rocking of said shaft will oscillate said bracket and roller.

14.l In a priting press or like machine, an oscil- 10 lating printing roller installation comprising, in

combination, a rock shaft, a bearing bracket for said roller, gripping means for attachment to said shaft, saidgrippingmeans including an annulus vsurrounding ,said shaft, an opening extending 15 secantiallyfthrough said annulus and intersectling the'circumference of said shaft, an'extensible rpiin having one part tting snugly within Vsaid opening and having an arcuate surface iitting the adjacent circumferential portion of said shaft,

20 the other part of said pin abutting a shoulder v onsaidannulus, whereby .contraction of said pin will causesaidarcuate portion to'grip the shaft gand lockthepin" and'annu'lus thereto, means for contracting `said pin, and resiliently yielding z'means ior `connecting said pin to said roller u bracket,fwherebyr0c1ng loi 'sai'dfshaft willY 'oscillatesaidbracke an ller'fandtthe'rollerwill be Vparts during yentretien.

REFERENCES f' CITED The followingreferencesgarerof record in the le of this patent:

UNITED STATES PATENTS Number Name Date 664,578 Pancoast Dec. 25, 1900 702,139 Lee June 10, 1902 985,479 Waller Feb. 28, 1911 1,383,945 Henderson July 5, 1921 2,248,645 Schlesinger July 8, 1941 80,386 Burleigh July 28, 1868 475,959 Andrews May 31, 1892 '45 1,055,398 Horvath Mar. 11, 1913 V FOREIGN PATENTS Number Country 'Date 496,110 v"Great Britain ."Nov. 23, 1938 :.50 A,15.385 Crreat Britain 1903

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