US2751239A - Hatch fastener - Google Patents

Description

June 19, 1956 P. F. NOGRETTE HATCH FASTENER 2 Sheets-Sheet 1 Filed April 30, 1953 v my HATCH FASTENER Pierre Franois Nogrette, Paris, France, assignor to Saint- Cloud Avions Marcel Dassault, Saint-Cloud, France, .a body corporate of France Application April 30, 1,953, Serial No. 352,237 Claims priority, application France January 8, 1953 3 Claims. (Cl. 292-36) My invention has for its object an arrangement for locking a hatch or the like opening panel, more particularly applicable to aircrafts, although not exclusively so.

My invention has for its primary object the execution of a locking system of a simple structure which is easy to control and that is perfectly reliable, while its bulk remains small.

According to my invention, the bolt-shaped members to be engaged and disengaged, are submitted to a kind of pivoting lever or plate mounted at a suitable point of a support secured to the hatch, while said lever is submitted in its turn, for release or engagement, to a clutch controlled by resiliently operating members.

I will now describe with further detail a preferred embodiment of my invention, reference being made to accompanying highly diagrammatic drawings, said description and drawings being obviously given only by way of an exempliiication. In said drawings:

Figs. l to 3 are respectively a view from inside including a cross-section through line l-I of Fig. 2, a cross-section through line ll-ll of Fig. l and a view from outside of a locking system corresponding to said preferred embodiment of my invention.

Fig. 4 is a view similar to Fig. 1 of a locking mechanism executed in accordance with a second embodiment of my invention.

Turning to Fig. l, the locking mechanism illustrated which is more particularly intended for the equipment of a hinged door, includes a framing 1 shaped so as to comprise parallel flanges or ribs 2 that are connected through their ends on the right hand side of Fig, 1 by a bridging piece 3. Between said flanges or ribs are pivotally secured at 4 two levers 5 5, each of said two levers carrying at its outer end a roller 5a. Said levers form together the arms of a fork the head of which is shown at 5b. A lever 7 is pivotally secured at 8 to a tubular spindle 9 extending across the framing 1. The lever 7 includes a plate with an inner central rib and also two parallel ilanges 7a the outer edges of which are cut into the shape of a cam outline 7b engaging the rollers 5a.

The lever 7 is pivotally secured at 10 to a link 11 to which a bolt 12 is secured so as to move translationally therewith. Said bolt is guided on one hand inside the bridge piece 13 and on the other in the bolt keeper 14. The latter is rigid with a corresponding section of the dormant part of the door.

In order to hold the locking mechanism in its operative position, the levers 5 are submitted to the action of springs R which urge constantly said levers into the position shown in the drawing, while the lever 7 is engaged by action of the head 5b of the fork formed by the two levers 5. lt is apparent from inspection of the drawing that the flanges 7a are each provided with a notch 7c inside which is fitted the edge of the head 5b. Said head 5b forms a pusher member, as may be readily ascertained by referring to the operation of the above described mechanism, which operation is as follows:

Depression on the pusher member 5b releases the lever `2 7 and the rollers 5a on ,the levers 5, which rollers engage the cam 7b, cause said lever 7 to rock and to project outside the framing 1. This lever 7 may then be taken hold of and rocked outwardly so as to lproduce a receding movement of the link 11 and consequently, the bolt 1 2 is moved out of ,its Vkeeper 14.

When it is desired to lock the door again, it is suicient to make the lever 7 rock into its collapsed position and by reason of the slopes 7d provided at the ends of the llanges 7a, the head 5b is caused to collapse until said slopes have moved past said head which is brought to rest with the interposition of an elastic tongue against the end of the member forming the lever 7.

Whenever it is desired to apply the locking mechanism forming the object of the invention to a completely dismountable hatch, it is preferable to resort to the modilication illustrated in Fig. 4. Said embodiment is identical with that which has just been described, except for the fact that the lever 7 is shaped so as to allow the connection therewith, respectively at 15 and 16, of two links 17 and 18 controlling two bolts located to either side of the hatch. Obviously, in this case, there may be provided on the hatch as many locking mechanisms as required.

My invention is not limited to the embodiment that has been more particularly described hereinabove and which is illustrated in the drawing and it includes all the modifications thereof falling within the scope of accompanying claims.

What I claim is:

l. An arrangement for locking a hatch to a stationary part, comprising at least one bolt adapted to engage said stationary part through a sliding movement in a plane parallel with that of the hatch, a first lever pivotally secured to the hatch, a link pivotally connecting said first lever to the bolt, a cam-shaped projection on said first lever and provided with a notch, a control lever pivotally secured to the panel, springs urging one end of the said control lever into locking surface engagement with the notch of the cam-shaped projection on the first lever, said control lever being collapsed when engaging the first lever against the hatch, the release of the cam-shaped projection on the first lever being obtained through depression of the other end of the control lever against the action of the spring.

2. An arrangement for locking a hatch to stationary parts on opposite sides of the hatch, comprising two oppositely directed bolts adapted to engage said stationary parts through a sliding movement in a plane parallel with that of the hatch, a first lever pivotally secured to the hatch, a link pivotally connecting said first lever to each bolt, a cam-shaped projection on said first lever, a control lever pivotally secured to the panel, springs urging one end of the said control lever into locking surface engagement with the cam-shaped projection on the lirst lever, said control lever being collapsed when engaging the first lever against the hatch, the release of the cam-shaped projection on the first lever being obtained through depression of the other end of the control lever against the action of the springs.

3. An apparatus for locking a hatch toa stationary part comprising a bolt slidably mounted on the hatch for engagement with the stationary part through sliding movement in a plane parallel with that of the hatch, a first lever pivotally mounted on the hatch about an axis perpendicular to the direction of sliding movement of the bolt, a link connected between a portion of the lever spaced from its pivot axis and the bolt, a cam shaped projection on a portion of said lever remote from its pivot axis thereof, said projection having a notch therein, a

control lever pivotally mounted for rocking movement Yagrumes;

about a pivot axis parallel to the pivot axis of the rst lever and positioned adjacent the cam shaped projection on the first lever, said control lever having a portion engageable with the cam shaped projection on the rst lever and with the notch therein, resilient means urging said portion of the control lever against the cam shaped projection, said control lever having an actuating portion adapted to be manually engaged to rock the sarne against the resilient means and release the first lever, and means carried by the control lever engageable with the first lever to shift the first lever from a position in which it is retained by the control lever.

References Cited in the le of this patent UNITED STATES PATENTS Accardi Feb. 15, 1938 Best Aug. 5, 1947 Wright July 26, 1949 FOREIGN PATENTS Switzerland Oct. 7, 1898 Sweden May 30, 1939 Austria June 11, 1951 France Mar. 11, 1935 OTHER REFERENCES Automotive and Aviation Industries, May 1, 1944,

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