US2458271A - Rotating base for load handling machines - Google Patents

Description

Jan. 4, 1949. w, us 2,458,271

ROTATING BASE FOR LOAD HANDLING MACHINES Filed July 5, 1945 s Sheets-Sheet '1 INVENTOR ATTORNEYS Jan. 4, 1949. w. M. HUSTON' ROTATING BASE FOR LOAD HANDLING- MACHINES v Filed July 5, 1945 3 Sheets-Sheet 2 ,14 m n m 1 1 INVENTOR v fine 411. Alma j XTToRNEYs I/ .m -163 M T 8 -F-L r r----\.L ELF]? L r ,Lfu i Iva C FLA A mm mm. wv

Jan. 4, 1949; w. M. HUSTON 2,458,271

ROTATING BASE FOR LOAD HANDLING MACHINES Filed July 5, 1945 3 Shee ts-Sheet INVENTOR JUN/hr. (#63;

Patented Jan. 4, 1949 UNITED R'OTATIN G BASE FOR LOADT'HANDLING MACHINES William. M. Huston, Lima, Ohio Application July 5, 1945, Serial'No. 603,382

(Cl; 2l2'.-5.9.)

13 Claims. 1

This invention relates to load handling machines and' is' particularly concerned with a rotating base structure adapted to be mounted for swing motion on a crawler truck.

The invention is especially concerned with arotating base structure for load handling ma chines of large size capable of handling heavy loads, to which end of' rotating base of this invention incorporates a novel arrangement of primary structural elements, bracing webbing, and the like, having adequate strength to withstand the' heavy loads and forces encountered in a large and heavy machine, such, for example, asthe heavy loads imposed on the base structure by the operation of the machinery carried on the base, as well as by the boom' itself which is mounted on the base.

According to the invention, the rotating base structure, including both' the base proper and also certain other parts" which are directly and rigidly connected therewith, such as the machinery frames; are arranged to constitute a firm foundation or backbone for the boom, gantry, counterweight, power plant, operating machinery, and cab structure all of which are mounted on the base, the base, in turn, being mounted to rotate on the supporting truck structure about the axis of swing motion.

One of them'ore specific objects of the invention is a novel arrangement of structural elementsin the base, providing a pair of pockets in" the base structure itself adapted to receive and mount a pair of cable drums employed for boom hoist. In the arrangement of the invention the pockets for receiving the boom hoist drums are divided from each other by a structural member which serves also in the support of a power shaft from which power is transmissible to the boom hoist drums which are mounted in the pockets.

Another feature of the invention involves a novel arrangement of structural parts adapted to the support of specially formed fittings to which both the boom and the gantry are connected.

Still another object of the invention is the provision of a rotating base structure having a pocket or recess therein adapted to receive certain operating gearing, together with a gear casing of novel arrangement, the casing being sectionalized in a special manner providing convenience in handling and mounting of the casing sections.

According to the invention the gear casing above mentioned is further arranged toprovide support for certain other devices thereabove, as will further appear.

Still another aspect of the invention is the provision of various mounting pads onthe base structure itself, providing for the support of mounting and controlling devices associated with the machinery carried by the rotating base. A moreor less specific feature to be noted in this connection is the arrangement of portions of the base structure at the upper and lower sides thereofadjacent a given region, which portions are adapted to cooperate, respectively, in the support of a brake for an operating unit of the machine and with a controlling unit for said brake, the base structure being apertured in this region so as terms abrake control connection.

Howthe foregoing and other objects and advantages are attained will appear more fully from the following description referring to' the accompanying drawings in which Figure 1 is atop plan view of a rotating base casting incorporating various features of the invention;

Figure 2 is a bottom plan view of the base structure shown in Figure 1;

Figure 3 is a side elevational view of the rotating base shown in Figures 1 and 2, with various machinery frames and supports mounted thereon;

Figure 4 is a longitudinal vertical section through the structure shown in Figure 1, taken as indicated by the line 4---& on Figure 1, this view also indicating the location of certain units of the operating machinery mounted on the base;

Figure 5 is a transverse sectional view taken as indicatedby the line ii5 on Figure 1;

Figure 6 is a transverse sectional view taken as indicated by the line 6-6 on Figure 1;

Figure 7 is a transverse sectional view taken as indicated by the line 7-1 on Figure 1 but further indicating the location and arrangement of certain of the machinery supports and machinery shafts which are carried on the base;

Figure 8 is an enlarged top plan view showing a portion only of the base structure shown in Figure 1, and illustrating certain gear casing parts mounted thereon; and

Figure 9 is a side elevational view of the structure shown in Figure 8.

Although the drawings illustrate a base structure in the form of a casting, it is to be understood that at least most features of the invention may be attained in a built-up type of struc ture, for instance a structure fabricated by welding together various plates, beams, webbing, etc.

The structure shown in the drawings includes transversely spaced longitudinally extending primary structural elements iii-l2 which are extended along the sides of the base throughout the length thereof. An interbracing plate or deck it extends between the upper edges of the elements E2. The parts i2 and I3 are braced and interconnected by various webbing and the like, including certain webs specifically referred to hereinafter.

In a position transversely centered, but located well forwardly of the base, a bearing supporting housing I4 is provided to cooperate in the support of the vertical propel shaft l5 (see Figure 4) which serves not only to transmit driving power to the crawler truck on which the base is mounted but also to define the axis of swing motion of the base with respect to the truck. The housing 44 is transversely braced by webbing iii-l6 (see Figure 2) and also by centrally disposed longitudinally extending webbing I! and I8.

Another bearing receiving housing I9 is located in the base rearwardly of the housing 14, this housing cooperating in the support of the vertical swing shaft 20, carrying a pinion 2|, adapted to cooperate with an internal ring gear arranged in association with the truck structure, for instance in the manner disclosed in copending application Serial No. 603,376, filed concurrently herewith, entitled Load handling machines.

Still another bearing housing 22 is arranged in the base structure to the rear of the housing it), this housing cooperating in the support of a shaft 23 from which power is transmissible alternatively to shafts 20 and I5 through gearing 2d, 25 and 26, the gears 25 and 26 being adapted to be clutched, respectively, to the shafts 20 and 55 on which they are mounted. The details of this form of drive mechanism need not be considered herein, since the same form no part of the present invention per se and are, in any event, fully disclosed in the copending application above mentioned. Certain features of this arrangement further appear in issued Patent No. 2,354,863, August 1, 1944. The bearing housing 59 is braced by the central webbing l8 and also by webbing 21 which extends rearwardly therefrom to join the housing 22, which latter housing is further braced by central webbing 28 extended rearwardly therefrom (see particularly Figures 2, 5 and 6).

Machinery frames 29 and 30 are mounted on the base structure itself near the edges thereof, the frames being extended fore-and-aft throughout a large portion of the length of the base. Each frame is provided with a footing 3! providing flanges extended at both sides of the lower edge thereof, adapted to rest on elongated supporting pads 32, the flanges being secured to the vpads by bolts and preferably also by welding, so

as to firmly anchor the machinery frames to the base structure proper. The machinery frames, as best seen in Figure 3, are provided with recesses and apertures such as indicated at 33, 3d and 35, to provide for the support of the :primary machinery shafts, especially drum shafts for hoisting and for other functions, depending upon the particular type of machine in which the structure is used. It may here be mentioned .that the structure of the present invention is shells and the like.

For tranverse bracing, the machinery frames 29 and 3B are interconnected at their upper edges by a brace 29a (see Figure 3). Supports 29c are adapted to be mounted on the machinery frames and serve to carry portions of the cab structure which is mounted on the base to enclose the operating machinery.

The footing or flanges 3| of the machinery frames are interbraced with the upright portions of the frames themselves by means of webbing 36 (see Figures 3 and 7). Toward the front ends thereof the machinery frames are provided with extensions 31 which serve to contribute additional strength to the base structure adjacent the forward end thereof (at which point the boom and gantry are connected) and which may further be employed for the mounting of'other machinery which need not be considered herein.

In front of the machinery frames, adjacent each forward corner, the base is provided with pads 38 adapted to support separately formed devices 39 for mounting the foot of the boom and also the lower forward ends of the front or compression gantry legs. Each of these devices may, if desired, be fabricated or, as shown in the drawings, maycomprise a casting consisting of a bottom wall 39a adapted to rest on the pad 38, and upright walls forming pockets 40 and ll in the rear portion thereof and forming spaced and apertured lugs such as indicated at 42 projecting forwardly. The lugs '82 cooperate with a pin 43 serving to mount the boom 44. The forward lower ends of the front or compression gantry legs (a fragment of one of which is shown at 45) are adapted to be received in pockets such as those indicated by the numeral 4|, each leg being secured in position by a pin 46. The unitary formation of these mounting devices 39 is of advantage in insuring adequate strength to transmit heavy forces between the gantry and boom during operation. The devices 39 are advantageously both bolted and welded to the base structure itself and are also desirably welded to the front ends of the extensions 31 of the machinery frames and in this way a structure of substantial depth and strength is provided toward the front end of the rotating base. With respect to the mounting of the devices 39, further attention is directed to the fact that extensions all are provided at the front of the rotating base so as to extend the area of support and provide for additional bracing by Webbing 48 which lies in longitudinal vertical planes and interconnects the extensions 41 with the transverse structural element 43 of the base structure,

At the forward end of the base, a fair-lead bracket 50 is provided intermediate the extensions 41 in the region of the central longitudinal bracing element H (see Figure 2). The fairlead bracket is adapted to cooperate with a fairlead as used in a drag line or other similar load handling machine, in which a heavy pull longitudinally of the machine is required. The positioning of the bracket as described above andthe provision of the longitudinal element H is of importance in carrying the heavy loads encountered in the operation of the fair-lead.

On the underside of the base, as shown in Figure 2, pads are provided as indicated at 5|, 52, 53 and 54, to provide for the mounting of brackets for supporting main and hook rollers which are adapted to ride on the circular track of the truck of the machine, a pair of the main rollers being indicated in Figure 2 at 5| a. The arrangement and mounting of these rollers need not be condimension than the other.

sidered in detail herein as they form no part of the present invention per se. However, they are fully disclosed in the copending application :Serial No. 603,379, filed concurrently herewith and for the purpose of insuring firm fastening of the mounting brackets for these rollers, bolt holes 55- are provided through the base structure itself (see Figures 1 and 2) the bolt holes being counterbored toward their upper ends as indicated at 55 (see Figure 1), so that the heads of the fastening-bolts Will lie below the machinery frames and other parts mounted on the top of the base structure. The various pads 51 to 54 are supported and braced by webbing such as indicated at 5'! in Figure 2, so as effectively to carry the roller loads.

As best seen in Figure 4, longitudinally spaced transversely extending structural elements 58 and 59 are arranged toward the rear of the base structure, being interconnected with the primary longitudinal side elements 5 2-l2. In this region, an additional longitudinally extending element 50 is provided to interconnect the elements 58 and 59. The interbrace 68 (see Figures 1 and 2) is offset toward one side of the longitudinal Vertical mid-plane of the bearing housings l4, l9 and 22, so as to divide the space between the transverse elements 58 and 59 into two pockets (BI and 62, one of which is of substantially greater transverse These pockets are adapted to receive the boom hoist drums shown in Figure '7 at 83 and 64 which are mounted to rotate on the boom hoist shaft 55 which is supported in the side portions of the base structure. The larger pocket 52 is adapted also to accommodate a transmission unit'SS through which power is -transmissible to the boom hoist drums 03 and 64. This arrangement of boom hoist drums and of the drive therefor is disclosed in copending application above identified, Serial No. 603,376, en-

titled Load handling machines, and need not be considered in detail herein. It is here noted,

however, that the transmission unit 65 is provided with mounting flanges 66a and 66b (see Figure 4) which are adapted to be secured to the supporting pads 57 and 68, respectively, which are arranged in the regions of the transverse structural elements 59 and 58, respectively.

The longitudinally extending interbrace Ell also serves to carry a mounting pad 69 adapted to support the standard 10 (see Figure 7) which cooperates in mountin the power or jack shaft 1 I. Power is transmissible from the jack shaft to the transmission unit 56 in a manner which need not be considered in detail herein. It is noted, howeventhat the shaft H is adapted to receive power through the sprocket l2, the sprocket being coupled by means of a chain to an engine (not shown). The jack shaft ll further receives support from the machinery frame 3|], as well as from an additional standard 13 which lies between the plane of the sprocket 12 and the gearing 14 through which power is transmitted from the jack shaft to other machinery shafts mounted on the frames 29 and 30. One such additional shaft is shown in Figure 7 at 15.

will be noted that at the rear of the rotating base the side portions thereof are extended rearwardly as at 16-46 to provide for the support of counterweight, as shown at 71 in Figure 3, and also for the support of the power plant orengine. The operating machinery through which driving of the shaft 23 (in the mid-region-of the base) is eifected, forms no part of the present invention per se, but attention is now called to the fact that the gearing 24, 25 and 26 which is associated with vertical shafts 23, 20 and l5,'is located ina recess or pocket formed in the upper side of the base structure, being defined by bottom and sidewalls l8 and i9, as best shown in Figure 4. This pocket serves as a lubricant reservoir for the gearing therein and the shafts on which the several gears are mounted.

As shown in Figure 1 a pad surrounds the upper edge of the pocket mentioned just above'to provide for the mounting of a 'gear casing, the arrangement of which is best shown in Figures 8 and 9. As there seen, the gear casing is seetionalized, comprising three principal sections 8|, 82 and 83. The dividing lines between the sections extend transversely of the machine, as at 84 and 85, these dividing lines further being'so located longitudinally of the base that sections! overlies the region of gear 28, section 82 overlies the region of gear 25 and section 8-3'overlies the region of gear 24.

Bevel gear 86 is fixed at the upper end of-vertical shaft 23 (see also Figure 4) and this bevel gear is housed within the casing section-83. Gear 86 is adapted to mesh with a bevel pinionsl-fixed on the transverse reversing shaft 83, the shaft 88 being adapted to be mounted in the machinery frames as at 35 (see Figure 3). Casing section 83 carries another casing part 83a having a portion 83?) extended upwardly to enclose a part of the transverse reversing shaft 88. Another casing part 89, having an observation window 89a, is carried on the section 83 and is adapted to 'be bolted to part 83a, the part 89 serving .to enclose gear 8! and also a portion .of the transverse reversing shaft 88, and being adapted toibe .connected with a casingZQb which extendsinwardly from and is formed integrally withthe right-hand machinery frame 29. It may be mentioned that shaft 38 is adapted to be drivenalternatively in either direction by operating machinery which need not be considered herein, although, if desired, reference may be had to copending application identified above, Serial No. 603,376, entitled Load handling machines.

By virtue of the casing arrangement described above, all of the driving gearing (:81, 85, 24, :25 and. 26) for the shafts 2.3, 20 and I5, is housed in a sectionalized casing structure the various parts of which receive at least theirprimary support directly from the base structure.

The casingsection 8| further carries'a standard 90 (see Figures 8, 9 and'3) which serves-asa support for a brake band fulcrum, for instancefor a hoist drum brake as disclosed in the copending application last mentioned above. A housing 9! carried by casing section 8! provides a pocket for the reception of a spring adapted to be associated with such a hoist brake. The specific manner of mounting of the brake parts in association with standard 90 and pocket 9! neednot be considered herein, but attention is directed to the fact that, as shown in Figure 1, the region of the baseJstructure underlying these parts-is provided with :a pad *92 :of extended area, so .as to provide .ex-

tended supporting area for the parts mounted thereon. 1

Various other brackets and supports, such as those shown at am, 8 lb and Me, are mounted on the casing part 8!, these elements cooperating in the support of controlling devices for truck steering and truck locking, from which control connections are extended downwardly through opening 8ld into and through the interior of the hollow vertical shaft [5 to the truck. In addition to the brackets just mentioned, casing section 8! further carries a pad Blewhich is positioned to support a portion of the front wall of the cab structure.

The central section 82 of the casing carries a bracket 82a which cooperates with the control for a swing brake which is adapted to be associated with an upward extension of the swing shaft 20, as disclosed in Patent No. 2,354,863 above mentioned. Moreover, section 82 also has a central bearing housing 821) for support of the swing shaft 20.

Because of the arrangement of the several casing sections and parts above described, maximum convenience is afforded in gaining access to the gearing and in handling the casing parts when assembling and taking down the machine. It may be noted, for example, that casing section 8! may be removed independently of the mid-section 82, and further that the casing parts 33a and 39 may also be removed and replaced independently of the mid-section 82, and, moreover, independently of section 83.

From Figure 1 it will also be seen that an extended pad 93 is provided just ahead of the boom hoist drum pocket 6i, this pad serving to carry a bracket 94 (see Figures 8 and 9) with which another brake band 95 is associated. Brake band 95 is adapted to be operated by a bell-crank lever 96 which in turn is actuable by a control rod or element 91. The rod 91 may be adjusted in any desired manner, for instance by a fluid pressure power piston and cylinder device mounted at the underside of the base .by means of a bracket 9ia (see Figure 3). Here again, these brake operating parts need not be considered in detail, although attention is called to the provision of aperture 98 through the base (see also Figures 1 and 2), so as to accommodate thecontrol connection (bell-crank lever 96) which extends from the control device mounted below the base to the brake band above the base.

With further reference to Figure 1 it will be noted that supporting pads 9!! and Hill are provided on the base adjacent the front end thereof intermediate the planes in which the machinery frames are mounted. These additional pads may be employed for supporting other machinery units; for instance, the pad 99 may be used for mounting brackets adapted to carry an intermediate crowd shaft when a chain crowd is used for shovel operation, and pad l cc may be used for mounting a bracket adapted to carry a crowd chain tightener.

I claim: 1. For a crawler type load handling machine,

a rotating base structure comprising a pair of -of, the base structure having means adapted to cooperate with a vertical machinery shaft for support thereof, which means is located transversely of the base in the mid region thereof and longitudinally of, the base intermediate the front end thereof and the said transverse elements, bracing webbing lying in a longitudinal vertical plane in said mid region adjacent the bearing supporting means, andbracing Webbing interconnecting said transverse elements and lying in a longitudinal vertical plane laterally offset from the plane of the first webbing so as to divide the space between the transverse elements into two pockets one of which is of greater transverse dimension that the other, the smaller pocket being adapted to receive a boom hoist drum and the larger pocket being adapted to receive another boom hoist drum together with a transmission unit through which power is transmissible to theboom hoist drums.

2. In a crawler truck type load handling machine, a rotating base structure having means adapted to cooperate in the support of three vertically disposed shafts, one of which provides for truck drive and is located on the center of swing motion, a second of which provides for swing motion, and the third of which comprises a power shaft through which power is transmissible to the other two, the rotating base structure being provided with a pocket for receiving gearing for the transmission of power from the power shaft to the other two, and a casing for enclosing said gearing, the casing being removably mounted on the base structure and comprising at least two separately mounted casing sections respectively associated with said pocket in the regions of different shafts.

3. In a crawler truck type load handling machine, a rotating base structure having means adapted to cooperate in the support of three vertically disposed shafts arranged in the longitudinal vertical mid plane of the machine, one of which provides for truck drive and is located. on the center of swing motion, a. second of which provides for swing motion, and the third of which comprises a power shaft through which power is transmissible to the other two, the rotating base structure being provided with a pocket for receiving gearing for the transmission of power from the power shaft to the other two, and a casing for enclosing said gearing, the casing being removably mounted on the base structure and being divided along a transverse line between two of the shafts to provide a plurality of separately mountable casing sections.

4. In a crawler truck type load handling machine, a rotating base structure adapted to carry operating machinery and having means adapted to cooperate in the support of three vertically disposed shafts, one of which provides for truck drive and is located on the center of swing motion, a second of which provides for swing motion, and the third of which comprises a power shaft through which power is transmissible to the other two, the rotating base structure being provided'with a pocket for receiving gearing for the transmission of power from the power shaft to the other two, and a casing for enclosing said gearing, said casing havin a mounting fitting thereon adapted to cooperate in the support of a controlling device for a unit of the machinery mounted on the base.

5. In a crawler truck type load handling machine, arotating base structure adapted to carry operating machinery and having means "adapted to cooperate in the support of three vertically disposed shafts, one of which provides for truck drive and is located on the center of swing motion, a second of which provides for swing motion, and the third of which comprises a power shaft through which power is transmissible to the other two, the rotating base structure being provided with a pocket for receiving gearing for the transmission of power from the power shaft to the other two, and a casing for enclosing said gearing, said casing being removably mounted on the base structure and comprising at least two separately mounted casing sections respectively associated with said pocket in the regions of different shafts, and a section of the casing having a mounting fitting thereon adapted. to cooperate in the support of a controlling device for a unit of the machinery mounted on the base.

6. For a crawler type load handing machine, a rotating base structure adapted to carry operating machinery including a rotative operating unit having a brake associated therewith, the base having means at the upper side thereof adapted to cooperate in the support of a brake part and having means at the lower side thereof adapted to cooperate in the support of a brake controlling device, and the base further being apertured in the region of said means to pass a control connection extended from said device to the brake.

7. In a crawler truck type load handling machine, a rotating base structure adapted to carry operating machinery and having means adapted to cooperate in the support of three vertically disposed shafts, one of which provides for truck drive and is located on the center of swing motion, a second of which provides for swing motion, and the third of which comprises a power shaft through which power is transmissible to the other two, the rotating base structure being provided with a pocket for receiving gearing for the transmission of power from the power shaft to the other two, and a casing for enclosing said gearing, said casing being removably mounted on the base structure and comprisin at. least two separately mounted casing sections respectively associated with said pocket in the regions of different shafts, and a section of the casing having means thereon adapted to cooperate in the support of cab structure for housing the machinery mounted on the base.

8. For a crawler type load handling machine, a rotating base structure adapted to carry operating machinery including a transverse shaft mounted in spaced relation above the base, a vertical shaft and gears interconnecting Said shafts; the base structure having means adapted to cooperate in supporting the vertical shaft, a gear casing part removably mounted on the base and enclosing a gear on the vertical shaft, and a second gear casing part mounted on the first and enclosing a gear on the transverse shaft.

9. For a crawler type load handling machine, a rotating base structure adapted to carry the operating machinery, gantry and boom, and a gantry and boom mounting device formed as a unit separately from the base and secured to the base, said device having upright walls forming pockets adapted to cooperate with the gantry legs in the rear portion thereof and spaced lugs projecting forwardly thereof, the walls and the lugs being apertured to receive removable connecting pins by which the gantry and boom are adapted to be removably connected with the said device and therethrough with the rotating base structure.

10. A construction according to claim 9 in which the gantry and boom mounting device comprises a unitary casting adapted to be secured to the base structure.

11. For a crawler type load handling machine a rotating base structure adapted to carry the boom at the forward end thereof and having transversely spaced longitudinally extending primary structural elements adjacent the sides thereof, and transversely spaced machinery frames mounted on the base and rigidly connected therewith in the region of said longitudinal elements, the machinery frames having extensions in the forward region of the base projecting forwardly well beyond the main machinery-supporting portions of the frames, which extensions are also rigidly interconnected with the base in the region of said longitudinal elements to provide a combined structure of considerable overall depth so as adequately to carry the loads imposed on the rotating base by the boom.

12. A construction in accordance with claim 11 and further including separately formed devices for mounting the boom, which devices are located on the rotating base at the forward edge thereof in advance of the forward extensions of the machinery frames, and the said devices being rigidly interconnected with the rotating base and with said extensions, whereby to further contribute to the strength of the base structure in the region of mounting of the boom.

13. For a crawler type load handling machine,

r a rotating base structure comprising a pair of primary structural elements extending longitudinally of the base in transversely spaced parallel relation, boom pivot mountings carried by the longitudinal elements adjacent the front ends thereof, longitudinally spaced transversely extending structural elements interbracing the longitudinal elements toward the rear end thereof, an interbrace extending longitudinally of the base and inter-connecting said transverse elements, the longitudinal and transverse elements and the interbrace cooperating to define a pair of pockets in the base structure toward the rear end thereof for receiving and mounting a pair of boom hoist drums, and a pad on one of the pocket defining members adapted to carry a bearing support for a power shaft from which power is transmissible to the boom hoist drums.

WILLIAM M. HUSTON.

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

UNITED STATES PATENTS Number Name Date 604.900 Lancaster May 31, 1898 782.034 Johnston Feb. 7, 1905 888.690 Browning May 26, 1908 1,008.338 Holt Nov. 14, 1911 1,710,322 Russell Apr. 23, 1929 1,808.898 Kerr June 9, 1931 1 909,507 Russell May 16, 1933 1,917,955 Dierks July 11, 1933 2,071,135 McGiffert et al. Feb. 16, 1937 2,131,479 McGiffert et a1. Sept. 27, 1938 2,144,760 Harnischfeger Jan. 24, 1939 2,162,994 Baker June 20, 1939 2,366,558 Ranch Jan. 2, 1945 2,368,268 Spiegel Jan. 30, 1945 2,408,378 Davenport Oct. 1, 1946

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