US2771136A - Hatch-cover - Google Patents
Hatch-cover Download PDFInfo
- Publication number
- US2771136A US2771136A US497330A US49733055A US2771136A US 2771136 A US2771136 A US 2771136A US 497330 A US497330 A US 497330A US 49733055 A US49733055 A US 49733055A US 2771136 A US2771136 A US 2771136A
- Authority
- US
- United States
- Prior art keywords
- panels
- panel
- truck
- arrangement
- rope
- 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
Links
- 238000004804 winding Methods 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/42—Telescopic props with parts held relatively to each other by friction or gripping with special parts to influence the friction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J7/00—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs
- B60J7/02—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes
- B60J7/04—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes with rigid plate-like element or elements, e.g. open roofs with harmonica-type folding rigid panels
- B60J7/041—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes with rigid plate-like element or elements, e.g. open roofs with harmonica-type folding rigid panels for utility vehicles, e.g. with slidable and foldable rigid panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D39/00—Wagon or like covers; Tarpaulins; Movable or foldable roofs
- B61D39/002—Sliding or folding roofs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D39/00—Wagon or like covers; Tarpaulins; Movable or foldable roofs
- B61D39/006—Opening and closing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
- B63B19/12—Hatches; Hatchways
- B63B19/14—Hatch covers
- B63B19/18—Hatch covers slidable
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/502—Prop bodies characterised by their shape, e.g. of specified cross-section
Definitions
- each sheet of panels are operated, as a rule, by means of one or two ropes or chains.
- the front panel 7 which is the driving panel, i. e. the panel exerting a traction or a thrust on the panels to which it is connected.
- each rope or chain may be caused to actuate an end panel of the series.
- the panels are operated by means of one or a pair of ropes or chains drivingly connected with one or both end panels of the series.
- Figure 2 is a corresponding plan view thereof
- FIG. 3 is a diagrammatical and fragmentary view of the same arrangement
- Figure 4 is a fragmentary view at a greater scale of a joint between two adjacent panels
- Figure 5 is a sectional detail view showing a modified embodiment of a joint between two adjacent panels
- Figures 8 and 9 show at a greater scale two successive positions of the panels during their displacements
- Figures 10, 11 and 12 are fragmentary views similar to Fig. 1 showing three alternate forms of embodiment, and
- Figures 13 and 14 are other fragmentary side views similar to Fig. 1 showing at a greater scale two different positions of a specific form of embodiment of the means utilized for locking the panels in their spread or closed positions.
- the two end panels i. e. 1 and 1', are attached to a pair of independent ropes or chains adapted to operate in opposite directions to spread the panels over the truck top or move them back to their stowed position, or to a single rope or chain adapted to move in both directions. It is also possible to attach only the front panel 1 to a single or double driving rope or chain. This last-mentioned solution is shown in the drawings.
- the single rope 8 is arranged as shown in the diagram of Fig. 7.
- the rope 8 is wound around a drum 9 of a hand-actuated winch and passes over sheaves or grooved rollers 10, 10', 10", 10" and 11", 11", 11 and 11 before beingwound around a drum 12 adapted to be operatively connected through a common shaftor rod 13.
- the rollers 10 and 11 are positioned on either side of the truck. aperture and preferably in planes parallel to the panel runways.
- the end panel 1' is attached to the rope 8 at 14 and 15, i. e. on either side of the aperture to be closed thereby.
- the point of attachment 14 is selected on'the rope side issuing directly from the drum '9',
- drums 9 and 12 may be actuated for example by hand cranks 16 and 17.
- the running rollers 3 are adapted to engage ramps 18 formed endwise of the runway 19 provided along the lateral upper edges of the aperture to be closed by the device according to the invention.
- a rod 20 carrying catch means 21 is journalled in bearings 22.
- a hand-actuated lever 23 movable in a segment-like guide 24 is adapted to rotate the rod 20 about its axis so that in the panel-locking position the catches 21 will engage appropriate notches or holes provided for this purpose at the relevant end of the outermost panel, as shown.
- the catches 21 are shown as engaging the holes formed in lugs 25 secured by welding or otherwise to the last or end panel 1".
- the runway 19 provided at the upper portion of the railway truck of the embodiment shown by way of example and more in detail in Figs. 3 and 6 comprises a lateral section member 26 formed with a retaining flange 27, for example.
- the panel is provided on the other hand with a lateral stop or rib 28 adapted to be positioned under the retaining flange 27 of section 26, as shown.
- the reference numeral 33 denotes a gap provided to enable the panel 1 to move without any risk of interfering with, or contacting, the upper framework of the railway truck, and any water entering the runway structure through this gap 33 will be drained through bottom holes 34.
- Fig. 4 shows the case of a sealed joint wherein the panel 1 carries at one end aprojecting portion 36 engaging a yielding member or mass 37 located in a channel 38 provided on the adjacent panel.
- Fig. 5 the case of a non-sealing joint is illustrated; this joint is obtained by removing the yield- As in the preceding case, theing mass 37 and inclining to the proper degree the section iron 35, thereby facilitating the draining of rainwater which, on the other hand, takes place without any difiiculty.
- the operator To open the truck equipped with the panel arrangement described hereinabove, the operator firstly actuates the drum 9, thereby pulling back the relevant side of the role 8; this rotation is transmitted to the other drum 1 2 which pays oh the rope to enable the panel 1 to move backwardly.
- a space is provided for stowing away the panels at one end of the truck by utilizing acut-ofi corner portion 39.
- This method of stowing away the panels avoids any undue increase in the longitudinal dimensions of the truck or, at least, of the buffers thereof.
- Fig. 10 a different arrangement is shown which differs from the embodiment of Fig. 1 only in that an additional or complementary space 40 is provided; however, this alternate disposition requires longer bumpers 41; on the other hand, the panels are located complementary outside the truck aperture and do not interfere with the space available therein.
- FIG. 12 A third arrangement is suggested in Fig. 12 wherein it is assumed that one of the panels remains horizontal when stowed away; in this case, it is the leading panel 1 which is constantly horizontal, whilst the other three or more panels are stowed away in their vertical positions.
- the increase in length of the bumpers 41 may be reduced to a minimum as the panel 1 may extend over a small portion of the truck aperture, as shown.
- a fourth solution is shown in Fig. 11 and consists of an arrangement whereby the bumpers 41 are not departed from their standard length. This result is obtained by simply increasing the number of panels in the series and reducing their longitudinal dimensions. With this arrangement, the space required for stowing away the panels may extend somewhat over the aperture to be closed.
- Figs. 13 and 14 is illustrated another form of embodiment of a device for locking the panels in their closed positions.
- a lifting lever 43 pivoted at 44 and adapted, when actuated through a link 45 rotating in the direction of the arrow F1, to be moved to the position shown in Fig. 14.
- This arrangement may also comprise a stop member 46 covered by a lining of rubber or like resilient material 47 and co-acting with the hook-shaped portion of a bellcrank lever 48 fulcrumed about a fixed pivot pin 49 secured on the runway; this bell-crank lever 48 is also pivotally attached through a pin 51 to a bar extending longitudinally of the runway and pivotally attached, on the other hand, to the link 45 at 52.
- a closing arrangement for a railway truck or the like comprising back, front and side walls said walls forming together an opening, an open guiding surface on the upper portion of said side walls flanking said opening, at least one series of longitudinally aligned movable panels, lateral roller means on said panels freely resting and rolling on said guiding surface in order to ensure a longitudinal displacement of said panels to open or close the truck, rigid link means for pivotally interconnecting two longitudinally adjacent panels, a stowage space at least at one of the ends of said space located substantially adjacent the respective back or front side, adapted to contain the different panels arranged side by side and in an upended position, inclined guideway portions extending inside said stowage space and constituting an extension of said guiding surface on which said roller means are adapted to move, further guiding means parallel with said inclined guideway portion but somewhat offset with respect thereto extending along the stowage space, lateral protrusions provided on each of said panels for positive cooperation with said further guiding means, the combined action of said protrusions along the
- pivots ensure the connection of said rigid link means with said panels, the pivot corresponding to at least one of the panels coinciding with the axis of the said rolling means.
- locking means are provided for said panels for holding them in the closed position, said locking means comprising rod means, catch means on said rod means, apertures on the rear side of at least the panel closest to the stowage space,
- lever means are provided for occluding the said grooves when the panels ride over said guide means.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Ocean & Marine Engineering (AREA)
- Combustion & Propulsion (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Hinge Accessories (AREA)
- Lock And Its Accessories (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1104985X | 1954-07-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2771136A true US2771136A (en) | 1956-11-20 |
Family
ID=9623147
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US497330A Expired - Lifetime US2771136A (en) | 1954-07-21 | 1955-03-28 | Hatch-cover |
Country Status (8)
Country | Link |
---|---|
US (1) | US2771136A (fr) |
BE (2) | BE539398A (fr) |
CH (1) | CH330706A (fr) |
DE (1) | DE1104985B (fr) |
FR (2) | FR1109250A (fr) |
GB (1) | GB767356A (fr) |
LU (1) | LU33639A1 (fr) |
NL (2) | NL100904C (fr) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2853131A (en) * | 1956-04-13 | 1958-09-23 | Kummerman Henri | Hatch cover |
US2993536A (en) * | 1957-12-31 | 1961-07-25 | Tell Edward Elias Von | Cargo-hatches |
US3046850A (en) * | 1958-03-10 | 1962-07-31 | Clair W Tellefson | Foldable walkway and storage apparatus therefor |
US3092065A (en) * | 1960-01-06 | 1963-06-04 | Internat Macgregor Organizatio | Multi-section closing or lift-lock devices having retractable bearing members |
US3155068A (en) * | 1961-03-01 | 1964-11-03 | Int Macgregor Org | Method and means for closing and locking movable panels and retractable bearing members, notably for sheds, shipholds and the like |
US3219101A (en) * | 1962-05-10 | 1965-11-23 | Martin Fleit | Awning |
US3267991A (en) * | 1962-12-03 | 1966-08-23 | Consulmar S A | Hatch cover and linkage therefor |
US3285217A (en) * | 1965-02-18 | 1966-11-15 | Fuller Co | Hatch cover assembly |
US3291514A (en) * | 1963-12-03 | 1966-12-13 | Goetaverken Ab | Latching means for hatch covers |
US3495354A (en) * | 1968-05-28 | 1970-02-17 | Automotive Prod Co Ltd | Hatch covers and like closure devices |
US3678985A (en) * | 1968-12-13 | 1972-07-25 | Mac Gregor Comarain Sa | Device for closing a hatch or the like |
JPS57142627U (fr) * | 1981-03-05 | 1982-09-07 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1198147A (fr) * | 1958-05-30 | 1959-12-04 | Ets Ad Mischler Sarl | Toit ouvrant pour wagon tombereau |
DE1216724B (de) * | 1962-12-03 | 1966-05-12 | Consulmar S A Fa | Lukenabdeckung |
DE1236963B (de) * | 1963-08-14 | 1967-03-16 | Hans K Kloess Dipl Ing | Mittels eines Transportwagens zu oeffnende bzw. zu schliessende Lukenabdeckung, insbesondere fuer Binnenschiffe und Schuten |
DE1605008B1 (de) * | 1967-06-03 | 1970-07-23 | Rheinstahl Siegener Eisenbahnb | Vorrichtung zum OEffnen und Schliessen eines Hubschiebedaches,insbesondere an Eisenbahngueterwagen |
GB2067139B (en) * | 1979-12-21 | 1983-11-30 | Mitsubishi Heavy Ind Ltd | Horizontal-pressure-sealed hatch cover system |
US5572932A (en) * | 1992-09-21 | 1996-11-12 | Aero Transportation Products | Railcar hatch cover |
EP2161151A1 (fr) * | 2008-09-03 | 2010-03-10 | VBG GROUP TRUCK EQUIPMENT GmbH | Couvercle coulissant |
CN108263414B (zh) * | 2018-01-17 | 2019-07-02 | 中车齐齐哈尔车辆有限公司 | 铁路货车顶盖启闭系统及其地面碰头装置 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US834287A (en) * | 1905-03-27 | 1906-10-30 | Ernest H Frey | Sectional cover for hatchways. |
US2268192A (en) * | 1939-08-09 | 1941-12-30 | Babcock Davis Corp | Closure for stair openings |
US2574312A (en) * | 1947-07-29 | 1951-11-06 | Altube Juan Manuel Camani | Closure operating means |
US2590985A (en) * | 1940-10-07 | 1952-04-01 | Macgregor Joseph | Ship's hatch cover |
US2614627A (en) * | 1949-11-14 | 1952-10-21 | Robert E Miller | Folding door |
FR1022707A (fr) * | 1950-08-01 | 1953-03-09 | Porte coulissante | |
US2633613A (en) * | 1948-08-17 | 1953-04-07 | Macgregor Joseph | Weatherstrip for hatch covers |
US2641214A (en) * | 1948-07-06 | 1953-06-09 | Macgregor Robert | Steel hatch cover |
FR1034395A (fr) * | 1951-03-23 | 1953-07-22 | Dispositif perfectionné de manoeuvre de panneaux de cale de navires ou analogues |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE836297C (de) * | 1948-02-14 | 1952-04-10 | Henri Kummerman | Vorrichtung an Lukendeckeln zur Beleuchtung und Belueftung von Schiffsladeraeumen |
DE926407C (de) * | 1948-07-06 | 1955-04-18 | Joseph Mac Gregor | Schiffslukenverschluss |
DE811792C (de) * | 1948-08-17 | 1951-08-23 | Joseph Macgregor | Dichtungsvorrichtung, insbesondere fuer Verschlussdeckel von Schiffsluken |
DE827367C (de) * | 1948-10-02 | 1952-01-10 | Siegener Eisenbahnbedarf A G | Dachausbildung fuer Eisenbahngueterwagen zur Erzielung einer Belademoeglichkeit von oben her |
GB698798A (en) * | 1948-12-18 | 1953-10-21 | Jean Georges Mercier | Improvements in or relating to covers comprising at least one pivotally mounted panel for openings, and more particularly for marine hatchway openings |
DE836608C (de) * | 1949-12-02 | 1952-04-15 | Henri Kummerman | Verfahren und Einrichtung zum Bedienen der Verschlussplatten von Schiffsluken |
FR1022796A (fr) * | 1950-08-03 | 1953-03-10 | Procédé et dispositif perfectionnés de manoeuvre des panneaux d'écoutille des navires | |
DE816206C (de) * | 1950-08-20 | 1951-10-08 | Heinrich Brummer | Wasserdichter Schiffslukendeckel aus Metall |
DE872464C (de) * | 1950-11-05 | 1953-04-02 | Heinrich Brummer | Abdichtung der Deckelfugen bei Lukenabdeckungen aus Metall |
DE914349C (de) * | 1950-11-07 | 1954-07-01 | Henri Kummerman | Wasserdichte Abdichtung fuer Luken, Tueren u. dgl. von Schiffen |
GB695657A (en) * | 1951-04-06 | 1953-08-12 | Robert Macgregor | Improvements in steel hatch covers |
US2647473A (en) * | 1951-06-20 | 1953-08-04 | Magor Car Corp | Car roof hatch cover operating mechanism |
DE863602C (de) * | 1951-10-30 | 1953-01-19 | Heinrich Brummer | Verroll- und Abstellvorrichtung fuer staehlerne Lukendeckel auf Schiffen |
DE885554C (de) * | 1951-11-29 | 1953-08-06 | Ver Westdeutsche Waggonfabrike | Ablaufvorrichtung fuer Kesselwagen |
DE865868C (de) * | 1951-12-25 | 1953-02-05 | Heinrich Brummer | Wasserdichter Schiffslukendeckel aus Metall |
DE898554C (de) * | 1951-12-30 | 1953-11-30 | Sncf | Plattformwagen fuer den Transport von Fahrzeugen |
-
0
- LU LU33639D patent/LU33639A1/xx unknown
- NL NL198455D patent/NL198455A/xx unknown
- BE BE539393D patent/BE539393A/xx unknown
- BE BE539398D patent/BE539398A/xx unknown
- NL NL100904D patent/NL100904C/xx active
-
1954
- 1954-07-21 FR FR1109250D patent/FR1109250A/fr not_active Expired
- 1954-10-26 DE DEI9298A patent/DE1104985B/de active Pending
- 1954-11-01 GB GB31546/54A patent/GB767356A/en not_active Expired
-
1955
- 1955-03-28 US US497330A patent/US2771136A/en not_active Expired - Lifetime
- 1955-06-07 CH CH330706D patent/CH330706A/fr unknown
- 1955-10-21 FR FR68323D patent/FR68323E/fr not_active Expired
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US834287A (en) * | 1905-03-27 | 1906-10-30 | Ernest H Frey | Sectional cover for hatchways. |
US2268192A (en) * | 1939-08-09 | 1941-12-30 | Babcock Davis Corp | Closure for stair openings |
US2590985A (en) * | 1940-10-07 | 1952-04-01 | Macgregor Joseph | Ship's hatch cover |
US2574312A (en) * | 1947-07-29 | 1951-11-06 | Altube Juan Manuel Camani | Closure operating means |
US2641214A (en) * | 1948-07-06 | 1953-06-09 | Macgregor Robert | Steel hatch cover |
US2633613A (en) * | 1948-08-17 | 1953-04-07 | Macgregor Joseph | Weatherstrip for hatch covers |
US2614627A (en) * | 1949-11-14 | 1952-10-21 | Robert E Miller | Folding door |
FR1022707A (fr) * | 1950-08-01 | 1953-03-09 | Porte coulissante | |
FR1034395A (fr) * | 1951-03-23 | 1953-07-22 | Dispositif perfectionné de manoeuvre de panneaux de cale de navires ou analogues |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2853131A (en) * | 1956-04-13 | 1958-09-23 | Kummerman Henri | Hatch cover |
US2993536A (en) * | 1957-12-31 | 1961-07-25 | Tell Edward Elias Von | Cargo-hatches |
US3046850A (en) * | 1958-03-10 | 1962-07-31 | Clair W Tellefson | Foldable walkway and storage apparatus therefor |
US3092065A (en) * | 1960-01-06 | 1963-06-04 | Internat Macgregor Organizatio | Multi-section closing or lift-lock devices having retractable bearing members |
US3155068A (en) * | 1961-03-01 | 1964-11-03 | Int Macgregor Org | Method and means for closing and locking movable panels and retractable bearing members, notably for sheds, shipholds and the like |
US3219101A (en) * | 1962-05-10 | 1965-11-23 | Martin Fleit | Awning |
US3267991A (en) * | 1962-12-03 | 1966-08-23 | Consulmar S A | Hatch cover and linkage therefor |
US3291514A (en) * | 1963-12-03 | 1966-12-13 | Goetaverken Ab | Latching means for hatch covers |
US3285217A (en) * | 1965-02-18 | 1966-11-15 | Fuller Co | Hatch cover assembly |
US3495354A (en) * | 1968-05-28 | 1970-02-17 | Automotive Prod Co Ltd | Hatch covers and like closure devices |
US3678985A (en) * | 1968-12-13 | 1972-07-25 | Mac Gregor Comarain Sa | Device for closing a hatch or the like |
JPS57142627U (fr) * | 1981-03-05 | 1982-09-07 | ||
JPS6144522Y2 (fr) * | 1981-03-05 | 1986-12-15 |
Also Published As
Publication number | Publication date |
---|---|
DE1104985B (de) | 1961-04-20 |
NL100904C (fr) | |
BE539393A (fr) | |
FR1109250A (fr) | 1956-01-24 |
CH330706A (fr) | 1958-06-15 |
LU33639A1 (fr) | |
BE539398A (fr) | |
NL198455A (fr) | |
FR68323E (fr) | 1958-04-29 |
GB767356A (en) | 1957-01-30 |
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