US1868515A - Scraper for ditching machines - Google Patents

Description

July 26, 1932 H. H. BARBER I SCRAPER FOR DITCHING MACHINES Filed Dec. 9, 1929 5 Sheets-Sheet 1 m/"42 2i 77a? fl Earlier:

July. 26, 1932. H BARBER 1,868,515

SCRAPER FOR DITCHING MACHINES Filed Dec. 9, 1929 5 Sheets-Sheet 2 veer? arr-a: fidrg f7. Barfien July 26, 1932. H. H. BARBER SCRAPER FOR DITCHING MACHINES Filed Dad. 9, 1929 5 Sheets-Sheet 3 4 4:25. 1Q 7747f Barert V y 1932- H. H. BARBER 1,868,515

SCRAPER FOR DITCHING MACHINES Filed Dec 9, 1929 5 Sheets-Sheeft 4 IYYQ /EPF j/arg fl Barer'.

July 26, 1932. H. H. BARBER 1,853,515

SCRAPER FOR DITCHING MACHINES Filed Dec. 9, 1929 I 5 Sheets-Sheet 5 Patented July 26, 1932 UNEEE STATES PATENT OFFICE HARRY H. BARBER, OF AURORA, ILLINOIS, ASSIGIIOR TO BARBER COMPANY, F AURORA, ILLINOIS,.A COR-FORA'IION OF ILLINOIS SCRAPER FOB, DITCI'IING IYIACHINES Application filed December 9, 1929. Serial No. 412,679.

This invention relates to a scraper for ditching machines, and concerns itself with a yielding mounting therefor, whereby the scraper becomes released when encountering an unusual obstruction.

" The invention comprises the novel structure and combination of parts hereinafter described and more particular y pointed out anddefined in the appended claims.

. In the accompanying drawin which illustrate a preferred form of thisinvention and in which similar reference nun erals refer to siinilarfeatures in the different views:

' Figure 1 is an elevational view of the scraper and its supporting frame.

; Figure 2 is a front elevational view of the scraper in detached form. I

Figure 3 is an enlarged part elevational and part sectional View of the supporting 520 means for the scraper. YT

F igure 4 1s a View similar to Figure 5.

I illustrating the scraper in its released position.

Figure 5 is a fragmentary elevational view zA ofa modified form of release mechanism for supporting the scraper.

Figure 6 is a sectional view taken upon the line VIVI of Figure 5.

Figure 7 is a sectional view taken upon the line VTI-VII of Flgure Figure 8 is a fragmentary side elevatlonal View of a modified form of the invention. T -Figure 9 is a fragmentary front elevational view of the scraper.

Figure 10 is a fragmentary top plan view of a part of Figure 11.

Figure 11 is an enlargedpart sectional and part elevational view, showing the release mechanism of the form shown in Figure 8.

Figure 12 is a view similar to Figure 11, showing the parts in released position.

' V In connection with this invention only certain partsof the ditching machine have been illustrated that cooperate with the scraper.

These parts consist of a frame 1 comprising a pair of horizontal angle bars and a pair of vertical angle bars, only one of each set of angle bars being shown. A pair of depending strips 2'extend from the horizontal angle -eoibars to which they are pivoted and these strips 2 are pivoted at their lower endsto the two parallel supporting bars 3 of'the scraper. I

The scraper is also pivotallyconnected by a pair of vertical links 4 with the upright frame members 1, whereby the scraper is pivotally supported or-susp'ended from the frame. The upper end of the scraper frame carries a roller 5 which may be secured to the frame in any convenient manner. This invention concerns itself more directly with releasable mechanism for retaining the upper end of the scraper through the instrumentality of the roller 5 as will presently appear.

According to this invention, a pair of parallel gusset plates 6 are attached to the frame 1. It will be noted that the gusset plates 6 are respectively attached to the horizontal and vertical angle members respectively and projecttherebeyond. A pair of spaced swingable plates 7 are pivoted to the gusset plates 6 by means of a pivot pin 8 which is locked against removal by means of adetent 9, as shown in Figure 3. Reinforcing plates 10 are welded to the sides of the swingable plates 7 for reinforcingthe same. Each plate 7 has a recess terminating in an arcuate portion 11. The roller 5 which is carried by the upper end of the-scraper is adapted to freely enter this recess and normally contact the arcuate portion 11, as shown in Figure 8. A yielding latch member 12 is provided for yieldingly securingthe roller 5 in said recess and in contact with said arcua-te portion 11. The lever 12 is pivoted intermediate its ends upon a pivot pin 13 which extends betweenthe two swingable plates 7. This lever 12 is provided with an offset portion let adjacent one end for engaging the roller 5 and securing the same 'in' said recess. The lever 1 1 projects beyond the olfset portion to provide a handle 15 whereby it may be manually adjusted in the event the scraper has been released. 7

The rear end of the lever 12 carries an adjustable screw 16 which is adapted for contacting a stationary fulcrum. block 17 upon the gusset plates 6. An abutment 18 is secured to the swingable plates 7 for supconnects the two 'swingable plates 7 This anchor rod 22 passes through, an abutment 24 on the gusset plates and a coil spring surrounds the rod 22 and abuts the abutment 24 atone end thereof. The other end of the coil spring 25 is confined by a suitableabutment 26 secured uponthe end of the bolt 22. The abutment 26 is preferably adjustable through the instrumentality of suitable nuts 27 screwed upon the end of the anchor rod. i

. Withreference to Figure 3, it will be noted that the tendency of the coilspring 25 is to retain theswingable plates 7 with the stop stud 20. engageable in the recess 21. Likewise, the coil spring 19 normally maintains the locking latch member 12 in the position shown in Figure 3 in which thefroller 5; is yieldingly retained within the recesses ofthe swingable plates 7. Should the scrap er encounter an abnormal obstruction that tends to elevate the same, the swingable plates 7 will be partially rotated upon their pivot pin 8, as shown'in Figure 4. As the swingable plates 7 are caused to rotate in such man'- ner, the pivot pin 13 of the locking latch lever 12 will be carried therewith, but, as the outer endof said'locking latchlever is held from downward movement by the abutment 1 7,.the pivot, 13 must move downwardly, with; the result that there will bea separatior 1-;.of;v the latch lever and the arcuate portion 11 ofthemovableplates 7 as shown in Figure 4, wherebythe roller 5 may escape from said recess. -This will prevent any damage or, injury to the parts if the scraper should encounter'abnormal resistance. a f In Figures 5 and 6, a slight modification of the invention hasbeen shown, and, in referring to these figures, it will be noted that alljthe ,difierentpar'ts are exactly the same as are shown in Figures 1 and2 and 3 and 4, with the, exception that the anchor rod 22 and the'spring 25 are arranged in a vertical position instead of in a horizontal position.

Duev to the vertical arrangement of the anchor rod 22, the gusset plates that support the swingable .platesare'slig'htly different in form, but, as they constitute no part ofthis invention except as to form supports for the movable plates 7, they might be of any contour. 7 1 u I i a InFigures8 to 11, affurther modification of the invention has been illustrated as our bodying the preferred form. In this form, a pair of supports or gusset plates 29' are secured to the frame 1 in spaced relation, as shown in Figure 9. These supports have a re-entrant portion 29a for receiving a roller 30 which is journalled or secured upon a bolt or the like 31 secured to the bars 32 of the scraper. The re-entrant portion 29a is adapted to be closed by a retaining lever 33 which is substantially in the form of a bell-crank lever with its lower arm curved upwardly as indicated at 33a and pivoted between the two supports at its apex, as indicated at 34.

The'retaining lever 33 is adapted to belatched behind the roller 30 to releasably retain the scraper in operative position. i To this end, a latch lever 35 is pivoted intermediate its ends upon a pivot 36 extending.

through said supports 29. This latch lever has a cut-out portion 35a which forms a shoulder 35b for engaging the retaining lever 33, as shown in Figure 10. Upon each side of the latch lever 35 there is a lever 37.. The

levers 37 are pivoted at their rear ends upon a bolt 38 extending between but not through the plates 29, and they are-also pivoted'at an intermediate point upon the pivot 36. It willbe noted that the rear end of the latch lever 35 is free and that aspring 39 secured upon the top of the supports bears thereon forward of thepivot 36. Y v

The lower edges of the levers 37 normally rest upon the roller 30 and they are yieldingly pressed against said roller by a coil spring 40 which is anchored by means ofa rod 41 extending therethrough and having a nut 42 engaging the top thereof. The lower end of the rod 41 is swiveled upon the bolt 38 and the spring 40 bears against a plate 43 secured to the upper edges of the plates 29. i

The scra er 1s su orted for swin in D movements at its upper end through the 37 and compress the spring 40. At about the same time the latch lever 35 would be elevated for releasing the retaining lever 33 which would be swung downwardly, as shown in dotted lines in Figure 2, due to the outward force exertedthereon by the scraper, which would become released. In connection therewith, it will be noted that the spring 40 yieldingly supports the scraper at its work.

After the scraper has been released, it may be replaced in the yielding latching mechanism. As it swings over into operative position, the roller 30 will engage the curved end of the retaining lever and swing the same back into its full line position.

I am aware that numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I, therefore, do not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

1. In a ditching machine embodying a scraper, a support having a re-entrant portion, a scraper having a roller for entering said re-entrant portion, a retaining lever pivoted to said support and swingable for engaging said roller, a latch lever for latching said retaining lever, and yielding means acting in a downward direction on said scraper.

2. In a ditching machine, a scraper, means for supporting said scraper for upward movement, yielding means tending to resist such upward movement, and latching means for normally retaining said scraper at its work and adapted to be released upon an upward movement of said scraper.

3. In a ditching machine, a scraper, yielding means acting in a downward direction upon said scraper, and coacting latching members for supporting the upper part of said scraper adapted to be released upon an upward movement of said scraper.

4. In a ditching m'achine embodying a scraper, means for releasably supporting the upper end of said scraper comprising a support, a pair of coacting members on said support for receiving a part of said scraper therebetween, and a yielding lever acting upon said scraper in a downward direction.

5. In a ditching machine, a scraper, means for releasably supporting the upper end of said scraper comprising a pair of coacting latching members adapted to be released upon an upward movement of said scraper, and yielding means tending to resist such upward movement of said scraper.

6. In a ditching machine embodying a frame, a plate upon said frame, a scraper having an upwardly extending portion, a holding lever pivoted to said plate, said upwardly extending portion having means engaged by said lever for normally maintaining said scraper at its work, a latch lever engaging said holding lever, and yielding means for normally maintaining said latch lever in cooperative relation with said holding lever, but adapted to yield upon upward movement of said scraper to release said holding lever.

7. In a ditching machine embodying a frame, a plate member upon said frame, said plate member having a re-entrant portion, a bell crank lever pivoted to said plate and having one arm extending into said re-entrant portion, a spring pressed latch lever pivoted to said plate and having a shoulder for en gaging said arm, and a scraper having means confined by said bell crank lever and adapted for elevating said latch lever upon upward movement of said scraper.

8. In a ditching machine embodying a frame, a pair of relatively movable coacting members upon said frame, a scraper having an upwardly extending member provided with transversely extending means normally confined between said co-acting members, yielding means for normally maintaining said members in engagement with said means, said members being adapted to be forced apart to release said transverse means upon upward movement of said scraper.

9. In a ditching machine embodying a frame, a plate having a re-entrant portion, a scraper having an upwardly extending portion provided with means normally located in said re-entrant portion, lever mechanism for engaging said means and normally maintaining the same in said re-entrant portion, and yielding means for controlling said lever mechanism adapted to yield upon upward movement of said scraper for releasing said means In testimony whereof I have hereunto subscribed my name at Aurora, Kane County,

Illinois.

HARRY H. BARBER.

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