US2189795A - Gasket construction - Google Patents

Description

' 1940- A. w. L. HARTBAUER 5 GASKET coiwsmucTIoN Filed Nov. 23, 19:7 2 sheets-sheet 1 774%. 16 P6 17 /VE/Y7'0/? Feb. 13, 1940. A. w. L..HART-BAVUER I 2,189,795

GASKET CONSTRUCTION Filed Nov; 23, 1937 ZShefs-Sheet 2 l a Q myE/vrm? Patented Feb. 13, 194i?) PAT 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 1 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 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 connag 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 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 3413 working tolerances permitted, therefore constant servicing and re-packing is required to maintain the degree of emciency of these yielding edges to insure proper contact as the hatch or door arrangements are moved to their respective ulti- 5 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 changes.

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

50 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 provide 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 weatherprooied after as- 5 sembly. p

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 and dispatch. 39

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- 15 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 the claims hereinafter set forth I intend to cover all modifications and variations of the invention.

,In the drawings: 4

Fig. 1 is a plan view showing the contour of the cloth which covers the core and forms the outer 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 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 alternate 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 perforated 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 the 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 showing 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 view of the first stage of joining two gasket units showing the butt joint thereof.

Fig. 14 is a plan view showing the completed 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 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 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 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 reinforcing 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 AA 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 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 the cloth covering cemented together with the metal reinforcement therebetween on the line BB of Fig. 10.

In constructing the gasket unit of the invention, the cloth covering I is suitably treated and 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 marginal 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 I, 8, 9, I 0 and II, the sections 1 and [I also constituting relatively short marginal portions of the cloth covering. The short marginal portions I and II are in longitudinal alignment with the long marginal portions 3 and 5.

Gauging the width of the parallel edge portions 3 and 5 is necessary to provide integral cloth covering to encase the reinforcing I'I shown 1.1 Fig. 6 or the reinforcements shown in Figs. 7 and 8. The location of the slits 4 and 6 is determined by the length of said reinforcements. This makes possible integral single ply reinforcement of the joint 20 by utilizing the cloth covering, thereby eliminatirg application of additional gusset portions on the bearing and contact surfaces of the gasket at this point, ordinarily considered necessary 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 for encasing the reinforcing medium.

Fig. 2 shows the sponge rubber cores I2 and I3 each provided with a square end to register with end 2 of the cloth covering I. The opposite ends cf the cores I2 and I3 are contoured to register with the bifurcated sections of the cloth shown in Fig. 1. One side of the rubber cores I2 and I3 is coated with cement Ia and the cores l2 and I3 are placed on the cloth I contacting the treated surface of the cloth I, thereby forming the flat 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 I4 is used, the contour being the same as that of the rubber core I2 of Fig. 4. The thickness of the core I4 is equal to the combined thickness of the cores I2 and I3 and the core I4 is cemented to the cloth I as shown in Fig. 5, thereby forming the flat section of the gasket units.

To complete the gasket units employing the cores I2 and I3 the fiat section assembly is folded until the uneven surfaces I5 and I6 of the cores I2 and I3 are in contact as shown in Fig. 9. The assembly is continued by placing the reinforcing wire IT, or other suitable reinforcements such as are shown at Ila in Fig. '7 and at I'Ib in Fig. 8, on the exposed edges of the cores I2 and I3 and folding the edge 5 of the cloth I over the reinforcing wire I! partially covering the reinforcing wire I! and forming the gasketretaining flange or tongue I8 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 I1 and a portion of the edge 5 of the cloth I, forming the attachment flange I9 and encasing the reinforcing wire H to maintain this assembly. The exposed surfaces of the rubber cores I2 and I3 and the edges 3 and 5 of the cloth I having been given a coat of cement Ia, 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 I! offer unrestricted opposed contact surfaces on the treated surface of the cloth I as a means of encasing said wire reinforcement 11 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 of thecores of the other unit, cement Ia having been applied to the contact surfaces in advance. The parts are then registered and joined together to form the joint 20 as shown in Figs. 13 and 14. The tabs and marginal portions 1 and II are 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 I2 and I3 as shown in Fig. 15. The ends of the unit assembly are then partially closed by the tabs I0 and II which are brought in contact with the cemented exposed ends of the cores I2 and I3 and a portion of the outer edge as shown inFig. 16. In order to complete the closing of the end the tabs 1 and 8 are brought to binding contact with the cemented surface of the core I2 and the tabs I0 and II of the sloping end of the unit and a portion of the outer edge as shown in Fig. 17.

iii?) lid aiearec The gusset 2i is applied to the outer surfaces of the flanges iii of the respective assembled units to reinforce the butt joint thereof. The assembled gasket generally designated 29 is completed 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 corners 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 2 3 and the retaining groove 25. The

frame sections 22 are secured to the cover plate 26 with bolts or screws, the lining 2? is nailed to the frame members 22, the resultant space 28 between the frame 22, the plate 26 and the lining fl is filled with suitable insulating material.

The assembled gasket 253 .is applied with the flange is in contact with the attachment surface '23 and supported bythe surface 26% as the retaining flange iii registers with the retaining groove 25. In this position the assembled gasket 29 is secured to the Surface 23 of the frame member 22 with a series of nails 36 through the attachment flange it. Thus cooperative fastening to maintain the fixed relation of the gasket flange it and the groove 25 of the frame 22 is provided, thereby preventing lateral or cross slip of the 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 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 3! are joined at the corners in I Patent is: r

1. In a. gasket the combination of a base portion, said base portion being of fabric material, a core, said core being rectangular and attached to said fabric, said fabric having marginal portions, said portions forming two separated flanges extending in opposite directions, one of said flanges constituting an attachment flange and the other of said flanges constituting a retaining flange,

said attachment flange and said retaining flange each being adapted to extend angularly to the contact and bearing surfaces of said core, and said fabric covering said core.

2. In a gasket the combination of a base portion, said base portion being of fabric material, a core, said .core being rectangular and attached to said fabric, said fabric having marginal portions extending beyond said core, a reinforcing member, said marginal portions and said reinforcing member forming two separated flanges extending in opposite directions, one of said flanges constituting an attachment flange and the other of said flanges constituting a retaining flange, said attachment flange and said retaining flange each being adapted to extend angularly to the contact and bearing surfaces of said core, 'and said fabric covering said core and said reinforcing member. v

3. In combination a blank for constructing a gasket, which blank consists of a fabric member having a V shaped cut-out portion, slits ex-=- tending into said blank on the lines of the v shaped cut-out portion at the base thereof, a pair of slits extending into said blank at the top portions of the V shaped cut-out portion, a pair of dividing slits on opposite sides of said blank, and a pair of rectangular cores, said cores being spaced apart and attached to saidfabric member in a longitudinal plane and said fabric member with its attached cores being adapted to be folded on a line extending inwardly from the base of said V shaped cut-out whereby said cores may be folded against each other and permit said fabric member to encase said cores.

4. in combination a blank for constructing a gasket, which blank consists of a fabric member having a V shaped cut-out portion, slits extending into said blank on the lines. of the V shaped cut-out portion at the base thereof, a pair of slits extending into said blank at the top portions of the V shaped cut-out portion, a pair of dividing slits on opposite sides of said blank, a pair of rectangular cores, said cores being spaced apart and attached to said fabric member in a longi tudinal plane, and a reinforcing member, said reinforcing member being positioned against the inner edges of said cores and extending angularly beyond the bearing surfaces of said cores, and

' the sides of said cloth covering, said cores being spaced from each other to form a central cloth section, the marginal portions of the cloth covering being slit and adapted for corner assembly, and a reinforcing member adapted to contact the inner edges of the cores and extending angularly beyond the bearing surfaces of said cores, portions of the extending cloth margins being folded over the reinforcing member, said assembly of the portions of extending cloth margins and reinforcing member being ;ioined and forming a gasket tongue and an attachment flange.

6. In an assembly of two gasket units, the combination of a cloth covering for each gasket unit, a pairof rectangular cores and a reinforcing member for each unit, said cloth covering being treated on one side thereof, each of saidcores being attached to the respective cloth covering on the treated side thereof, said cores of each unit being spaced apart, marginal portions on the sides of said cloth covering, the marginal portions of the cloth covering of each unit being slit forming a long marginal portion and a shortv marginal portion on the sides of each unit, the long marginal portions of said cloth covering for each unit being utilized to cover said pair of rectangular cores and the respective reinforcing member, said short marginal portions of said cloth covering of each unit being utilized for the reinforcement and cooperative angular joining of the said units, said reinforcement members for each unit being adapted tocontact the edges of the cores thereof and extending angularly beyond the bearingsurfaces of said cores, said assembly 1 of the long portions or extending cloth margins and the respective reinforcing members being joined and forming a gasket tongue and an oppositely disposed attachment flange for each unit.

'7. In an assembly of two gasket units, the combination of a cloth covering for each gasket unit, a rectangular core and a reinforcing member for each unit, said cloth covering being treated on one side thereof, each core being attached to the respective cloth covering on the treated side thereof, marginal portions on the sides of said cloth covering, the marginal portions of the cloth covering of each unit being slit forming a long marginal portion and a short marginal portion on the sides of each unit, the long marginal portions of said cloth covering for each unit being utilized to cover said rectangular cores and the respective reinforcing member, said short marginal portions of said cloth covering of each unit being utilized for the reinforcement and cooperative angular joining of the said units, said reinforcement members for each unit being adapted to contact the edges of thecores thereof and extending angularly beyond the bearing surfaces of the core, said assembly of the long portions or extending cloth margins and the respective reinforcing members being joined and forming a gasket tongue and an oppositely disposed attachment fiange for each unit.

AUGUST W. L. HARTBAUER.

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