US701908A - Dust-guard. - Google Patents

Description

Patented inne lo, |902.

No. 70:,908. l Y

P. MARTIN. DUST GUARD.

(Application led' Aug. 12, 1901.) (No Model.) 2 Sheets-Sheet l.

www "M m/1%@ Patenrted lune I0, |902.

PQMARTIN.

nusr GUARD. (Application fvled Aug. 12, 1901) GbR.

UNITED STAT-Es PATENT i VOFFICE.

To HENRY MARTIN,'oE sT. PAUL, MINNESOTA. l

DUST-GUARD.

SPECIFICATION forming part of Letters Patent No.' 701,908, dated June 10,1902.

Application nea August 12. 1901. sentire. 71.677. (No man.)

To all whom. it may concern:

Be it known that 1, PETER MARTIN, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Dust-Guards for Car-J ournals and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. Y

My invention has for its object to provide an improved dustguard for car-axle and box journals; and to this end it consists of the novel devices and' combinations of devices hereinafter described, and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Figure 1 is a view principally in central vertical section, but with some parts shown in vfull andothers broken away, showing an ordinary car-axle and journal-box having myr improved sand-guard applied thereto. Fig. 2 is av transverse vertical section taken on the line a02 m2 of Fig. 1. Fig. 3 is a detail in side elevation showing my improved sand- Fig; 4 is a section on the line m4 :1:4 of Fig. 3; andV Fig. 5 is a view corresponding to Fig. 4, but

guard removed from working position.

illustrating a slightly-modified construction.

The numeral 1 indicates the car-axle, having a slightly-reduced portion 2 Vand a still further reduced journal portion 3.

The numeral 4 indicates the journal-box, which is formed at its inner end with an axlepassage 5, which is of course much larger than the said axle. In the inner wall of the axle-box 4, surrounding the passage 5,is a seat 6, which is adapted to receive the sections of the dust-guard. This seat 6 is open at its upper end and is Apreferably slightlytapered or flared upward to adapt it to receive a plugstrip 7, which is normally driven tightly into the same.

The sand-guard in its most approved form is constructed substantially as illustrated in Figs. 3 and 4 and also, but less clearly, in

tuted therefor.

Figs. 1 and 2. The uppersection 8 ofthis sand-guard is formed with depending prongs k9, which are adapted to straddle and closely tit the section 2 of the axle 1. 'A semicircular wearing-'segment 10 isset into a suitable seat cut in the guard-section 8, being preferably securedby means of brass nails 1l, the heads of which are countersunk into the said strip 10.- This strip is bent on such an arc that it is adapted to closely Iit the section 2 of the axle throughout its upperone hundred and eighty degrees. Said strip 10 is' preferably made of wood fiber orsimilar hard and tough material which will wear Well and put but'very slight friction upon the axle.v

"This strip 10 being detachable may be Ieadily removed when worn and another substi- To form a tight joint between the relatively hard strip 10 and the guard-section 8,l a-segmental packing-strip 12, of felt or other yielding material, is preferably placed between the said two parts.

The lower section of the guard is aorded by 'a segmental piece 13, the inner surface of which is adapted to fit the lower half of the section 2 and the sides of which are adapted to closely it between the prongs 9 of the sec- The section 13 is therefore supplecases this lower section, as well as the prongs 19, may be dispensed with. When dispensed with, however, the construction will not be the full equivalent of that illustrated in the drawings.

When the plug-strip 7 is removed from the upper end of the seat 6, the upperguard-section 8 may be easily dropped into working position by inserting it at the upper end of the said seat. The lower guard-section is of such width that it cannot be inserted into `working position while the axle 1 andthe box 4 stand in the normalrelations indicated in However, by' dropping the the drawings. box 4, so thatthe upper portion of the passage 5 rests upon the axle, the spaceV below the axle is so increased that the said guardsection 13 may be moved-,laterally into line with and then forced downward into thebottom of the guard-seat 6. This spring 14 of course serves to yieldingly press the guardsection 13 upward yinto close contact with the axle.

In the preferred arrangementa leaf-spring 15, similar to the spring 14, is secured by a small nail 15a to the under side of the plugstrip 7, so that it is removable therewith. When the plug-strip is placed in working position, it affords a base of reaction for the said spring, which spring then presses downward upon the upper end of the guard 8 and yieldingly presses its wearing-strip 10 against the axle. The tension of said spring 15 may be varied somewhat by driving the wedge 7 a greater or less distance into its seat 6.

As best shown in Fig. 4, the prongs 9 of the guard member S are reduced or made much thinner than the body of said member 8. Vhen these prongs are thus reduced in thickness, the supplemental section 13 is correspondingly reduced, and to hold the said section 13 in place laterally the said prongs 9 are provided with very thin metal cleats 9, which overlie the said section 13. The parts 9 and 13 are thus reduced in order to give good clearance between the same and the sides of the seat 6. This is important for several reasons, prominent among which is the fact that sand collected in said pocket 6 is prevented from causing the said parts to bind or become stuck in the said seat.

It will ofcourse be understood that a bearing-brass (not shown) will be placed between the top ot' the box 4 and the top of the journal portion 3 of the axle. The construction illustrated in Fig. 5 is the same as that illus- Lrated in the other views, except that the wearing-strip 10 is made slightly narrower and the packing-strip 12 is provided with an inturned flexible or yielding flange 12, which is adapted to bear lightly against the axle.

The device above described is of small cost, is adapted to be easily applied to journalboxes now in general use, and is extremely ef- Krenace cient for the purposes had in View. Modifications other than those above indicated may be made within the scope of my invention.

Vhat I claim, and desire to secure by Letters Patent of the United States, is as follows:

1. The combination with the axle 1 and box 4, the latter having` the axle-passage 5 and guard-seat 6, of the guard-section 8, and the supplemental lower guard-section 13 of such width that it may be inserted into workingposition when and only when the box is dropped on the axle, the plug-strip 7 driven into the upper end of said seat 6, and the springs 14 and 15 within said seat 6 acting on said guard-sections, substantially as described.

2. A sand-guard for car-journals, Ste., comprising,r a guard plate having a segmental notch, a segmental wearing-strip of relatively hard material detachably secured within said notch, and a packing-strip of yielding material placed between said wearing-strip and said guard-plate, substantially as described.

3. A sand-guard for car-journals, &c.,con1 prising the plate 8 with prongs 9, the segmental wearing-strip 10 detachably secured to said plate 8, flushed with the inner edges of said prongs 9, and the flexible or yielding packing-strip 12 secured between said wearing-strip 10 and plate 8, substantially as described.

4. The combination with an axle and a journal-box, the latter having a vertical guardseat, of a sand-guard within said seat approximately lling said guard-seat at its upper portion and reduced in thickness at its lower portion to afford increased clearance between the same and the sides of said seat, substantially as described.

In testimony whereof I alx my signature in presence of two witnesses.

PETER MARTIN.

W'itnesses:

E. H. KELIHER, F. D. MERCHANT.

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