US2085713A - Railway car construction - Google Patents

Description

ET AL 2,085,713'

June 29, 1937.

T. F. DWYER, JR,

RAILWAY CAR CONSTRUCTION Filed Feb. 17, 1936 5 Sheets-Sheet l iuyflar emf)? 50% INVENTORS BY flan-0mm June 29, 1937. -1 DWYER, JR" ET AL 2,085,713

RAILWAY CAR CONSTRUCTION Filed Feb. 17, 1936 a SheetsSheet 2 BY WHQRNEY June '29, 1937.

"r. F. DWYER, JR., ET AL RAJ ILWAY .CAR CONSTRUCTION Filed Feb. 17, 1936 s Sheets-Sheet 3 Thomas I! Dwyer, Jr., John Cm! as I H sett, ENTORS 20 which serve as guides for the buffer and guide.

Patented June 29, 1937 PATENT OFFICE 2,085,713 RAILWAY CAR CONSTRUCTION Thomas F. Dwyer, Jr., Cambridge, Mass, and

John Carl Hassctt; West Haven, Conn., assignorslto Fabreeka Products Company, Inc.,' Boston, Mass., a corporation of Massachusetts Application February 17, 1836, Serial No. 64,310

Claims.

Our'invention relates particularly to means for silencing railway car platform. A prolific source of noise on railway passenger equipment is the movement of the'buifer and guide stems through 5 the platform. These stems carry the face and tread plates and support the vestibule diaphragm. The movement of these stems communicates noise J to the platform and car frame'and also wears the slots in the platform.

A main object of this invention is to provide a means for substantially eliminating the troublesome noise due to movement of the buffer bar and other bars. 1

Another object is to provide an effective silencing device which is simple in construction, easy to install and durable.

We have discovered that noise transmission can be practically eliminated and wear substantially reduced by providing special fabricated sleeves stems in their movement back and forth in the platforni. Each sleeve in the form shown consists of two channel-like sections placed edge to edge and each section consists of inner and outer layers of metal with an intervening layer of a buffer stems.

material which prevents the transmission of soundcreating vibrations. For the most satisfactory results there should be no metallic connection between the sides of the bars and the 30 slots or passages in the platform.

Preferred forms of the invention are illustrated in the accompanying sheets of drawings, in which Fig. 1 is a section and vertical end view of a fragment of a car showing the platform and Fig. 2 is a fragmentary section of the platform and two of the sleeves on a somewhat larger scale. Fig. 3 is a longitudinal vertical sectional view -through the platform and showing one of the side buffer stems.

Fig. 4 is a fragmentary perspective showing one of the sleeves with the outer metal channel of the same length as the inner.

Fig. 5 is a sectional view similar to'Fig. 3, the

sectionhowever being taken on the vertical plane through the center bufier stem guide sleeve.

Fig. 6 is a transverse sectional view of one of the sleeve sections.

Fig; 'l is a detail fragmentary longitudinal section of one' end of a sleeve.

Fig. 8 is a longitudinal sectional view on a vertical plane showing a modified construction.

Fig. 9 is an enlarged fragmentary section of one 5 end of the guide sleeve shown in Fig. 8.

Fig. 10 isa longitudinal section through a guide for a circular buffer stem.

Fig. 11 is a section on the line I l-| l of Fig. 10.

Fig. 12 is a longitudinal section through another means for holding the buffer stem guide in position.

The platform construction illustrated is of the conventional type in which the platform frame II] has passages for the usual center buffer. stem H and the side stems l2, l2.

The guide sleeves for the stems of Figs. 1 to 9 are all substantially alike but of appropriate size to correspond with the stems and the passages provided for them in the platform. Each guide sleeve consists of two parts l4 and I5 which may conveniently be identical. Each section has an outer layer I6 which may preferably be of some material such as open hearth steel. The inner' layer I1 is preferably of a wear resistant metal such as rolled manganese steel.

In the preferred form of the invention the sound-deadening or non-vibrant material I8 is tightly embraced by the inner and outer shells of steel and consists of a series of layers of fabric such as cotton duck l9 impregnated with a rubber compound and also preferably interspersed with thin layers of rubber all vulcanized into a laminated structure which is substantially unaffected by changes in temperature, water, oil and gas. The non-metallic material differs from a rubber pad in at least two noteworthy respects, the first of which is that it has but little resiliency, and the second is that it has a remarkable capacity for absorbing sound or preventing the the halves of the sleeves to take up further sounds and vibrations.

The sleeve sections are suitably secured in the passages in the platform, for instance, by welding the ends of the outer layers'at the point 2 l. Each sleeve is tightly fitted in its passage 22 in the platform and provides a guide passage for the associated buffer stem. In the form shown in Figs. 2 and 3 a chafing block 23 is shown, and a shim .24, for instance of open hearth steel, is also provided. These shims may bewelded as at 25 I to the casting and the sleeve section welded at 28 to the shim so as to prevent relative movement of these parts.

In the form shown in Fig. 5 there are shims or filler plates 30 and 3| which may be welded in place as at 32. These constructions shown in Figs. 3 and 5 embody a size and design of nonvibrant sleeve adapted to be employed in an old form or preformed platform construction. The form shown in Fig. 8 is designed to be used in a platform construction which itself is designed and built to accommodate the non-vibrant sleeve.

, In this latter type of construction the sleeve is intended to be removable and is held in place by a front plate 35. In this case we provide a layer of the special non-vibrant material 36 which is vulcanized orotherwise secured to the protruding edge l8 of the non-vibrant unit. It will be seen that in this construction the rear end of the platform has a flange 31 which serves as an abutment for the sleeve so that the sleeve is held between the flange 31 and the front plate 35.

In making up the units the metal shells and the non-metallic members are cemented to-- gether under considerable pressure so that when completed each composite sleeve may be handled, installed and used as a unit with no likelihood of the parts becoming separated when in use.

It will be seen that this invention makes it possible to dampen and substantially stop the transmission of troublesome noise vibrations and that the parts are of such a character that the sleeves may be readily inserted into any existing is applied between the inner and outer channeltype of construction without requiring modification.

This material has been found to be extremely durable as it is practically impossible to permanently deform it under pressure. It-is-not subject to air vulcanization in the way that ordinary soft rubber is nor is it to any appreciable extent affected by long continued immersion in water or oil.

Furthermore it is not sufllciently resilient to allow the setting up of sympathetic vibrations.

It has none of the disadvantages of the highly compressible materials such as rubber and cork or other materials frequently proposed for silencing car structures. g

The shock absorbing pad used in this invention resilient and doesnot transmit sympathetic vi-' brations as freely as does rubber or other lively resilient materials.

An important feature of the present invention resides in the absence of any metal parts connecting the stem and the platform. Where such metal connections exist, they assist rather than retard the transmission of sounds. The shock absorbing pad is cemented to the metal plates by another cement from that used in the pad to get the best results, thereby avoiding the use of bolts or rivets which would tend to transmit lateral vibrations and build up noise.

A noteworthy feature of the present invention resides in having the two channel shaped halves contiguous only along the edges of the shock absorbing pad which project toward the other non-metallic shock absorbing material channel part and beyond the metal, thus precluding any metal to metal contact between channel plates.

The sound deadening guides of this invention are adapted for both the main and side buffer stems.

In Figs. 10 and 11 a. metallic tube or platform casting 40 encloses the buffer stem 35 and is prolongitudinally outward a washer 43 is welded at M to the member 60. If desired the material Qi'and the sleeve 42 may extend entirely through the member it, although in the form shown by Fig. 10 this shock absorbing guide is not made continuous but in two parts as illustrated.

In Fig. 12 the steel platform casting 50 is of the general shape shown in Figs. 3 or 5 for example except that at its inner end portion there is provided a flange or shoulder 55 adapted to engage the buffer stem guide to prevent the guide bearing unit being moved inwardly beyond said flange 5|. As before the guide bearing unit includes inner and outer plates 52 and 56 which are of channel shape as indicated in Figs. 2 and 4 for example, with a layer 53 of the same shock absorbing material previously described.

To prevent the buffer stem guide unit from being moved outwardly in use the outer channel plats 54 are welded at 55 to the frame 50. The outer channel plates at. their forward end, as shown in Fig. 12, extend longitudinally beyond the shock absorbing material and. inner plates whereas at the inner end of the guide bearing both plates andthe shock absorbing ma terial are substantially flush as illustrated.

Although the multi-ply fabric herein described is free of metallic means for transmitting metal to metal contact vibrations from the sides of the stems rto the platform and vice versa.

We claim:

1. In a railway car, a buffer stem guide comprising a channel shaped member including inner and outer channel shaped metal plates with held therebetween and free from metal to metal contact through the non-metal shock absorbing material, a supporting frame around said member, said member being held in position by having the outer channel plate extended'and secured lon- 'gitudinally beyond the inner plate and shock absorbingmaterial and being secured to said frame.

the channel, and a member closing said channel member and adapted to lie substantially contiguous the stem, said last mentioned member also spaced apart and non-metallic means for fastenhaving inner and outer plates between which ing said inner and outer plates. shock absorbing material is placed, the plates of '7. In a car construction, a device for deadensaid last mentioned member being held out ing the sound waves between a reciprocating 5 metallic contact with the plates of the channel metallic stem and its surrounding metallic supmember by the transversely projecting portions port consisting of a channel member formed of of said shock absorbing material. sound deadening material shaped to conform to 3. A platform frame having a passage and a said stem and rigid members only partially enbar or stem guide therein comprising a channel circling said shaped material for maintaining the member between the sides of which the stem is channel shape of said sound deadening material, 10 I located, said member including inner and outer said material including layers of fabric impregchannel plates having a shock absorbing material nated with rubber and having layers of rubber therebetween and extending transversely beyond therebetween and non-metallic means for holdin the ends of said plates on each side of the chanthe members in position thereby preventing metal nel and in a direction away-from the base of the to metal contact .from the stem to the support. 15 channel, and a member closing said channel 8. Means for preventing transmission of vibramember and adapted to lie substantially contions from a rod to its support which comprises tiguous the stem, said last mentioned member a tubular member formed of two complementary also having inner and outer plates between which parts, each of which has a layer of non-metallic, shock absorbing material is placed, the plates flexible but substantially non-compressible mate- 20 of said last mentioned member being held out rial with metallic inner and outer holding platesof metallic contact with the plates or the channel and non-metallic means for holding the layer member by the transversely projecting portions and plates of each part together and preventing of said shock absorbing material, said outer plates metal to metal connection between the inner being welded to the platform frame longitudinaland outer plates, said non-metallic material ex- 25 ly beyond an end of said shock absorbing matetending beyond said plates for preventing the i rial and inner plate and the shock absorbing maplates of one part from touching the plates of the terial being cemented to each of its contiguous other part. plates. 9. In a railway, car, a buffer stem guide unit 4. A guide for a reciprocating stem compriscomprising non-metallic shock absorbing mate- 30 ing two channel-like members arranged to form a Contiguous a metal member d Channelbetween them a tubular guide passage, each memshaped to conform to said stem, fl e metal her being composed of an inner and outer metal- -member contiguous additional non-metallic shock lic channel with interposed layers of shock ababsorbing material on the opposite side of said sorbing material, at least one of said shock abst m from Sa d fi t m n ned Sho k abso b- 35 sorbing layers extending beyond the edges of the ing material, at least one of said meta'F mem- 1 adjacent metallic members and preventing said bers being of less extent in cross section than metallic members from contacting with each its contiguous shock absorbing material whereby other. said material prevents any metal to metal con- .m 5. As an article of manufacture, a guide memtact between said members, and means for hold 40 her consisting of inner and outer metallic chaning said unit against longitudinal movement nel members with an interposed layer of shock with said stem. absorbing material extending beyond the edges railway a b Stem guideunit of the channel members, the outer channel mem compnsmg an Outer metal member an inner hers being spaced apart throughout their entire fo attachin a d member to the wall of a lati guide g z a v p extent, non-metallic shock absorbing material between said inner and outer metal members and ui 1 n in; Did]: (:1 il l l el aii 1 81 25038 metallic means engaging an end portion of said outer metal member and spaced from contact P bemg channel shaped to receive 551d Stem with said inner metal member for holding said r0 sound deadening material between the plates of unit in place against longitudinal movement each pair, said material comprising layers of fabwhereby any metal t metal Contact, b t said rio impr d wi r r and h v h l outer metal member and the inner metal member ers of rubber therebetween, said sound deadening is i p material being constructed and arranged to form I 'HOMAS F. DWYER, JR. common means for holding the pairs of plates JOHN CARL HASSE'I'I.

43 her having a portion extending beyond its end metal member said inner and outer metal 45*

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