US2838808A - Grain door - Google Patents
Grain door Download PDFInfo
- Publication number
- US2838808A US2838808A US410197A US41019754A US2838808A US 2838808 A US2838808 A US 2838808A US 410197 A US410197 A US 410197A US 41019754 A US41019754 A US 41019754A US 2838808 A US2838808 A US 2838808A
- Authority
- US
- United States
- Prior art keywords
- door
- grain
- section
- spacers
- cover sheets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D19/00—Door arrangements specially adapted for rail vehicles
- B61D19/001—Door arrangements specially adapted for rail vehicles for wagons or vans
- B61D19/002—Door arrangements specially adapted for rail vehicles for wagons or vans specially adapted for grain cars
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24174—Structurally defined web or sheet [e.g., overall dimension, etc.] including sheet or component perpendicular to plane of web or sheet
- Y10T428/24182—Inward from edge of web or sheet
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/24612—Composite web or sheet
Definitions
- Claim. (Cl. 20-35) My invention relates to grain doors and has for its objective the provision of a grain tight barricade for box car door openings.
- doors have applications other than the barricading of box car door openings. For instance, they may be used as panels to form the floor, walls, and roofs of buildings. For such use appearance plays an important part.
- the door of this application has one straight side and one convex side with the overall thickness of the door being retained. Tests have shown this fiat side door to have a strength equal to that of the double convex door when the load is on the flat side of the door but only 80% of its strength when the load is on the convex side.
- FIG. 1 is a perspective of a door section
- Fig. 2 is a cross section on the line 2-2 of Fig. 1
- Fig. 3 is a cross section on the line 3-3 of Fig. 1
- Fig. 4 is a cross section on the line 4-4 of Fig. 1
- Fig. 5 is a perspective of a spacer.
- the present grain door section comprises two sheets of material, such as plywood, of greater length than width having their adjacent narrow ends glued to each other with their middle portions spread apart for the reception of spacing means to which the cover sheets are glued.
- Figs. 1, 3, and 4 show the use of four spacers 1 for each door section S.
- This spacer 1, as shown in Fig. 5, has one straight side'2 and one convex side 3.
- This convex side 3 may be formed as a smooth curve or it may have a straight middle portion 4, approximating the middle third of the spacer length, parallel to the straight side 2. From each end of the middle portion 4 an end portion 5 converges toward the straight side 2.
- the adjacent faces of adjacent narrow ends of the cover sheets 6 and 7 are glued to each other for a distance of approximately 4".
- the cover sheets 6 and 7 are also glued to the spacers 1.
- the spacers 1 are made one foot shorter than the cover sheets 6 and 7 hence terminate 2" short of the glue area 8 thus permitting the spacer 1 to have a blunt end 9 which is not so easily damaged as it would be if the end of the spacer feathered out at 10 or the beginning of the glue area 8.
- Tests show that a 24" x 84" door section having four 1%" x 1%" spacers covered with A unsanded fir plywood will deflect only 1 /2" under a load of 3450# on a 6'0 clear spanthe door being loaded at the third points.
- Tests show that a 24" x 96" door section having four 2% x 2%" spacers covered with A" unsanded fir plywood Will deflect only 1 /2" under a load of 4970# on a 7'0" clear span-the door being loaded at the third points.
- These panels or sections may be used to build up other buildings suchas barracks.
- Window or sash openings may be framed into the panels of such buildings.
- the same (not shown) may occupy the space between the spacers.
- a grain door section having a pair of cover sheets of greater length than width having the end portions of adjacent faces of their adjacent narrow ends glued to each other to leave a fiat bearing surface on both sides of both ends of the door section and means to spread the cover sheets apart between their glued together ends which means comprises a plurality of similar longitudinal spacers each having one straight face and an oppositely disposed arched face to which faces the cover sheets are glued.
Description
E. G. STACK GRAIN DOOR June 17, 1958 Filed Feb. 15, 1954 United States Patent ()fice 2,838,808 Patented June 17, 1958 2,838,808 GRAIN DooR' Emmet G. Stack, Portland, Oreg.
Application February 15, 1954, Serial No. 410,197
1 Claim. (Cl. 20-35) My invention relates to grain doors and has for its objective the provision of a grain tight barricade for box car door openings.
This application is a continuation in part of my copending application Ser. No. 330,684, filed January 12, 1953.
These doors have applications other than the barricading of box car door openings. For instance, they may be used as panels to form the floor, walls, and roofs of buildings. For such use appearance plays an important part. To enhance appearance, while at the same time retaining the great strength of my double convex grain door described in the above application, the door of this application has one straight side and one convex side with the overall thickness of the door being retained. Tests have shown this fiat side door to have a strength equal to that of the double convex door when the load is on the flat side of the door but only 80% of its strength when the load is on the convex side.
A section of a straight side grain door is shown in the accompanying drawings in which Fig. 1 is a perspective of a door section; Fig. 2 is a cross section on the line 2-2 of Fig. 1; Fig. 3 is a cross section on the line 3-3 of Fig. 1; Fig. 4 is a cross section on the line 4-4 of Fig. 1; and Fig. 5 is a perspective of a spacer.
Throughout the drawings and the specification similar numerals refer to similar parts.
Similar to the doors in my copending application the present grain door section comprises two sheets of material, such as plywood, of greater length than width having their adjacent narrow ends glued to each other with their middle portions spread apart for the reception of spacing means to which the cover sheets are glued.
Figs. 1, 3, and 4, show the use of four spacers 1 for each door section S. This spacer 1, as shown in Fig. 5, has one straight side'2 and one convex side 3. This convex side 3 may be formed as a smooth curve or it may have a straight middle portion 4, approximating the middle third of the spacer length, parallel to the straight side 2. From each end of the middle portion 4 an end portion 5 converges toward the straight side 2. The
smooth curved spacer is the more costly to manufacture and nothing is gained in strength or appearance by its use.
The adjacent faces of adjacent narrow ends of the cover sheets 6 and 7 are glued to each other for a distance of approximately 4". The cover sheets 6 and 7 are also glued to the spacers 1. The spacers 1 are made one foot shorter than the cover sheets 6 and 7 hence terminate 2" short of the glue area 8 thus permitting the spacer 1 to have a blunt end 9 which is not so easily damaged as it would be if the end of the spacer feathered out at 10 or the beginning of the glue area 8.
Tests show that a 24" x 84" door section having four 1%" x 1%" spacers covered with A unsanded fir plywood will deflect only 1 /2" under a load of 3450# on a 6'0 clear spanthe door being loaded at the third points.
Tests show that a 24" x 96" door section having four 2% x 2%" spacers covered with A" unsanded fir plywood Will deflect only 1 /2" under a load of 4970# on a 7'0" clear span-the door being loaded at the third points.
The above door sections meet all requirements of the railroads for their box cars used to transport grain.
24" x 192" sections with three 1% x 3% spacers covered with A unsanded fir plywood carried a uniformly distributed live load of 20# per square foot on a 150" clear span with only 1 deflection.
It is apparent that these panels or sections have great strength and may serve as grain bins and corn cribs. Sufficient ventilation for corn cribs may be had by routing vertical slits (not shown) in the cover sheets.
These panels or sections may be used to build up other buildings suchas barracks. Window or sash openings (not shown) may be framed into the panels of such buildings.
Where insulation is required the same (not shown) may occupy the space between the spacers.
The information given above will serve to make other applications more apparent.
What I claim as new in the art follows:
A grain door section having a pair of cover sheets of greater length than width having the end portions of adjacent faces of their adjacent narrow ends glued to each other to leave a fiat bearing surface on both sides of both ends of the door section and means to spread the cover sheets apart between their glued together ends which means comprises a plurality of similar longitudinal spacers each having one straight face and an oppositely disposed arched face to which faces the cover sheets are glued.
References Cited in the file of this patent UNITED STATES PATENTS
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US410197A US2838808A (en) | 1954-02-15 | 1954-02-15 | Grain door |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US410197A US2838808A (en) | 1954-02-15 | 1954-02-15 | Grain door |
Publications (1)
Publication Number | Publication Date |
---|---|
US2838808A true US2838808A (en) | 1958-06-17 |
Family
ID=23623675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US410197A Expired - Lifetime US2838808A (en) | 1954-02-15 | 1954-02-15 | Grain door |
Country Status (1)
Country | Link |
---|---|
US (1) | US2838808A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3300550A (en) * | 1964-02-03 | 1967-01-24 | Atomic Energy Authority Uk | Method of forming graphite articles |
US3427705A (en) * | 1967-08-08 | 1969-02-18 | Robert L Campbell | Noncurling floor protector |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1428714A (en) * | 1918-08-09 | 1922-09-12 | Schwamb Peter | Aerofoil |
US2388485A (en) * | 1941-09-20 | 1945-11-06 | Langley Aviat Corp | Method of making airplane structures |
-
1954
- 1954-02-15 US US410197A patent/US2838808A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1428714A (en) * | 1918-08-09 | 1922-09-12 | Schwamb Peter | Aerofoil |
US2388485A (en) * | 1941-09-20 | 1945-11-06 | Langley Aviat Corp | Method of making airplane structures |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3300550A (en) * | 1964-02-03 | 1967-01-24 | Atomic Energy Authority Uk | Method of forming graphite articles |
US3427705A (en) * | 1967-08-08 | 1969-02-18 | Robert L Campbell | Noncurling floor protector |
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