Gasket construction

Feb. 13, 1940.

A. W. L. HARTBAUER

GASKET CONSTRUCTION

Filed Nov. 23, 1937

2,189,795

Sheets-Sheet 1

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Feb. 13, 1940.

A. W. L. HARTBAUER 2,189,795

GASKET CONSTRUCTION

Filed Nov. 23, 1937 2 Sheets-Sheet 2

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Patented Feb. 13, 1940

2,189,795

UNITED STATES PATENT OFFICE

2,189,795 GASKET CONSTRUCTION August W. L, Hartbaiaes·, Chicago, DI. Application November 23, 1937, Serial No. 176,071 7 Claims. (Cl. 20—69)

This invention relates to a gasket and means for joining said gasket units of two or more pieces, preferably adapted for application to railway car hatch and door arrangements.

The hatch closure and door arrangements in general use in railway cars employ the plug design. In these forms of closures it is absolutely necessary to provide some form of perimeter edging that will yield to compensate for variance in 10 construction to insure the seating of the plug or closure in ultimate closed position in both arrangements. The yielding edges of the hatch plug are usually formed by upholstering these edges over a foundation of curled hair or the like.

The yielding edges of the door parts are usually formed with a wood slab spring actuated foundation and covered with a felt form of padding and then upholstered to complete the application. The door arrangement yielding edging is not cong® tinuous, being applied in sections to either the car door parts or the car body parts. It is necessary that as the door arrangement units are moved to closed position that the yielding or sealing elements of the door and body register to 2$ insure an uninterrupted and continuous contact.

These methods of producing the hatch and door arrangement yielding edges result in a device that does not have the yielding range necessary to compensate for structural variance or the 3© working tolerances permitted, therefore constant servicing and re-packing is required to maintain the degree of efficiency of these yielding edges to insure proper contact as the hatch or door arrangements are moved to their respective ulti3g mate closed positions.

An object of this invention is to produce a form of gasket construction that will permit the change of the design of the hatch and door closures from the plug type seal to the top or flat 40 seal design, thereby eliminating individual fitting of these units to the respective openings and making possible hatch and door closure arrangements interchangeable in kind fully meeting all service conditions and not affected by climatic ⁴⁵ changes.

A further object of the invention is to adapt the various parts of the gasket construction to a sequence of operations for machine assembly.

5jj A still further object of the invention is to employ a core of sponge rubber or other'suitable material, in the gasket construction and encase the sponge rubber core to exclude air and light.

An additional object of the invention is to pro; vide a construction lending itself to maintaining the cross sectional area in the joining of the gasket sections.

A further object of the invention is to assemble a complete gasket unit predetermined as to size and cross section and weatherproofed after as- 6 sembly.

A still further object of the invention is to furnish the completed gasket assembly adapted for application to the hatch or door arrangements With accuracy arid dispatch. 1®

Further objects and advantages of the invention will be more readily apparent and more fully described in connection with the following description taken with the accompanying drawings showing the preferred embodiment of the inven- S® tion, but it will be understood that changes may be made in the parts and details of construction without departing from the principles of the. invention and I therefore do not limit myself to the exact construction shown and illustrated, but in ²⁰the claims hereinafter set forth I intend to cover all modifications and variations of the invention.

In the drawings:

Fig. 1 is a plan view showing the contour of the cloth which covers the core and forms the ²⁵outer surface of the gasket and which shows the bifurcated end of the cloth and the slits employed.

Fig. 2 is a plan view showing the contour of the sponge rubber cores.

Fig. 3 is a plan view showing the assembly of 30 the cloth and the sponge rubber cores.

Fig. 4 is a diagrammatic end view showing two sponge rubber cores assembled on the covering cloth.

Fig. 5 is a diagrammatic end view showing an ³⁵alternate method of using one rubber core assembled on the covering cloth.

Fig. 6 shows a section of the preferred form of wire cloth reinforcing used in the gasket.

Fig. 7 shows a section of an alternate kind of ⁴⁰perforated metal or composition reinforcing which may be used in the gasket. ‘

Fig. 8 shows a section of still another kind of expanded metal reinforcing which may be used in ₄the gasket.

Fig. 9 is a diagrammatic end elevation showing the gasket sections as shown in Fig. 3 folded for the application of the metal reinforcing.

Fig. 10 is a diagrammatic end elevation show- 50 ing the folded gasket sections with the metal reinforcing in position and one free edge of the cloth folded over.

Fig. 11 is a diagrammatic end elevation showing the folded gasket sections completely formed 55

2,189,796 with the metal reinforcement encased by both edges of the cloth cover.

Fig. 12 is a plan view of the assembled gasket unit as shown in Fig. 11, the metallic reinforce⁵ ment being shown in dash lines.

Fig. 13 is a diagrammatic isometric elevational view of the first stage of joining two gasket units’ showing the butt joint thereof.

Fig. 14 is a plan view showing the completed 10 butt joint of two gasket units as the reinforcing tabs of the rail cloth are cemented to the respective surfaces of the two joined gasket units to reinforce the joint thereof.

Fig. 15 is a diagrammatic end elevation of the .15 two joined gasket units showing the triangular shaped center tab of the cloth cemented to the beveled end surfaces of the cores.

Fig. 16 is a diagrammatic end elevation of the two joined gasket units showing the tabs of one 20 side of the cloth cemented to the beveled end surfaces of the cores and to a portion of the edge of the assembled unit.

Fig. 17 is a diagrammatic end elevation of the two joined gasket units showing the completed 2® end assembly thereof.

Fig. 18 is a plan view of the completed corner assembly of the two joined gasket units showing the corner reinforcing gusset applied to the top flange of the gasket to join the ends of the rein30 forcing members.

Fig. 19 is a plan view of a hatch closure gasket assembly showing four gasket units in applied position:

Fig. 20 is a cross sectional view on the line A—A 35 of the Fig. 19 and shows a hatch or door stile or rail and also the gasket diagrammatically, and, further shows the groove in the stile or rail necessary for the application of the gasket, and by dot and dash lines that the free end portion of the 40 gasket may flex.

Fig. 21 is a cross sectional view similar to Fig. 20, showing the gasket in service position as applied to a door arrangement.

Fig. 22 is an isometric cross-sectional view of 45 the cloth covering cemented together with the metal reinforcement therebetween on the line B—B of Fig. 10.

In constructing the gasket unit of the invention, the cloth covering I is suitably treated and ₅₀ weatherproofed preferably on one side only with cementitious or other suitable material, and then cut to the width and contour preferably as shown in Fig. 1. The cloth covering is provided with a square or butt end 2. The parallel edges or mar55 ginal portions 3 and 5 are relatively long and are gauged as to their width and length by the dimension of the slits 4 and 6. The opposite end of the cloth covering I is bifurcated and slit to form tab sections 7, 8, 9, 10 and it, the sections ¢0 7 and ί I also constituting relatively short marginal portions of the cloth covering. The short marginal portions 7 and 11 are in longitudinal alignment with the long marginal portions 3 and 5.

_e5 Gauging the width of the parallel edge portions 3 and 5 is necessary to provide integral cloth covering to encase the reinforcing 17 shown i.i Fig. 6 or the reinforcements shown in Figs. 7 and 8. The location of the slits 4 and 6 is determined 70 by the length of said reinforcements. This makes possible integral single ply reinforcement of the joint 20 by utilizing the cloth covering, thereby eliminating application of additional gusset portions on the bearing and contact surfaces of the gasket at this point, ordinarily considered neces sary to make this form of joint airtight and weatherproof, and thus maintaining by eliminating unnecessary laminations the uninterrupted contact and bearing surfaces throughout, and at the same time to provide integral cloth extensions 5 for encasing the reinforcing medium.

Fig. 2 shows the sponge rubber cores 12 and 13 each provided with a square end to register with end 2 of the cloth covering I. The opposite ends cf the cores 12 and 13 are contoured to register 10 with the bifurcated sections of the cloth shown in Fig. 1. One side of the rubber cores 12 and 13 is coated With cement la and the cores 12 and 13 are placed on the cloth t contacting the treated surface of the cloth I, thereby forming the flat 15 sections of the gasket units as shown in Figs. 3 and 4.

Fig. 5 shows an alternate form of gasket unit section, in which only one rubber core i 4 is used, the contour being the same as that of the rubber 20 core 12 of Fig. 4. The thickness of the core 14 is equal to the combined thickness of the cores 12 and 13 and the core 14 is cemented to the cloth I as shown in Fig. 5, thereby forming the flat section of the gasket units. 25

To complete the gasket units employing the cores 12 and 13 the flat section assembly is folded until the uneven surfaces (5 and 16 of the cores 12 and i3 are in contact as shown in Fig. 9. The assembly is continued by placing the reinforcing 50 wire 17, or other suitable reinforcements such as are shown at 17α in Fig. 7 and at 17b in Fig. 8, on the exposed edges of the cores 12 and 13 and folding the edge 5 of the cloth I over the reinforcing wire 17 partially covering the reinforcing M wire 17 and forming the gasket, retaining flange or tongue 18 as shown in Fig. 10.

To complete the gasket unit the edge 3 of the cloth I is folded over the exposed edge of the reinforcing wire 17 and a portion of the edge 5 4M of the cloth I, forming the attachment flange IS and encasing the reinforcing wire 17 to maintain this assembly. The exposed surfaces of the rubber cores 12 and 13 and the edges 3 and 5 of the cloth I having been given a coat of cement la, 4i will bind, bond and amalgamate these parts together with the reinforcing wire as pressure is applied and as is shown in Fig. 22. The meshes of the reinforcing wire 17 offer unrestricted opposed contact surfaces on the treated surface of 6i the cloth I as a means of encasing said wire reinforcement 17 within the structure as shown in Fig. 11 and Fig. 22.

In order to join the gasket units, the butt end of one unit is contacted with the exposed edges o; of the cores of the other unit, cement la having been applied to the contact surfaces in advance. The parts are then registered and joined together to form the joint 28 as shown in Figs. 13 and 14. The tabs and marginal portions 7 and II are fi( brought to binding contact with the cemented surfaces of the unit to reinforce the joint 20. The triangular shaped tab 9 of the unit is moved into cemented contact with the exposed sloping ends of the cores 12 and 13 as shown in Fig. 15. The ends of the unit assembly are then partially closed by the tabs 10 and II which are brought in contact with the cemented exposed ends of the cores 12 and 13 and a portion of the outer edge as shown in . Fig. 16. In order to complete the ' closing of the end the tabs 7 and 8 are brought to binding contact with the cemented surface of the core 12 and the tabs 10 and 11 of the sloping end of the unit and a portion of the outer edge as ¹shown in Fig. 17. 7

3,186,760

The gusset 21 is applied to the outer surfaces of the flanges 19 of the respective assembled units to reinforce the butt joint thereof. The assembled gasket generally designated 29 is completed S when the unit sections are joined at the corners. All exposed surfaces of the assembled gasket are then weatherproofed.

Figs. 19 and 20 show the hatch closure in which the frame sections 22 are joined at the comers 1® in a substantial manner. To form the frame of the closure the frame sections 22 are shaped to form the attachment surface 23, the gasket bearing surface 24 and the retaining groove 25. The frame sections 22 are secured to the cover plate 10 28 with bolts or screws, the lining 27 is nailed to the frame members 22, the resultant space 28 between the frame 22, the plate 26 and the lining 27 is filled with suitable insulating material.

The assembled gasket 2 9 . is applied with the flange IS in contact with the attachment surface 23 and supported by the surface 24 as the retaining flange iS registers with the retaining groove 25. In this position the assembled gasket 29 is secured to the surface 23 of the frame member ²⁵ 22 with a series of nails 30 through the attachment flange 19. Thus cooperative fastening to maintain the fixed relation pf the gasket flange i8 and the groove 25 of the frame 22 is provided, thereby preventing lateral or cross slip of the 3® assembled gasket with relation to the frame members as the outer edge surface of the gasket is free and may flex to suit service conditions as shown in Fig. 20.

In Fig. 21 the service position of the assembled ³⁵ gasket 29 is shown adapted for a door closure section utilizing the elements as shown in Fig. 20 . and adding the complemental section in which the frame sections 31 are joined at the corners in a substantial manner to form the frame of the 4® closure. These frame members 3 i are shaped to form the gasket contact surface 32 and are secured to the outer plate 33 with bolts or screws. The lining 34 is nailed to the frame members 31. . The resultant space 35 between the frame mem40 ber 31, the outer plate 33 and the lining 34 is filled with suitable insulating material.