US3813118A

US3813118A - Rotatable catch

Info

Publication number: US3813118A
Application number: US00266733A
Authority: US
Inventors: M Liber
Original assignee: SEILIB
Current assignee: SEILIB
Priority date: 1972-06-27
Filing date: 1972-06-27
Publication date: 1974-05-28
Anticipated expiration: 1991-05-28

Abstract

The invention makes it possible to reduce the number of parts required for the production of a rotatable catch in which no pivot is provided. A rotatable catch according to the invention comprises at least two semi-circular bolts each carrying at least two semi-circular orthogonal beads and two keeper housings receiving said bolts. It may be used for the closure of boxes, casings, doors, etc., and generally for the locking together of all parts coupled together or in contact side by side.

Description

United States Patent 1191 593,002 10/1947 Great Britain 292/190 Liber- May 28, 1974 ROTATABLE CATCH Primar ExaminerRobert L. Wolfe 7 1 1 L b I Y V l 5] Mlchel I er Pans France Attorney, Agent, or FirmKarl W. Flocks [73] Assignee: Seilib, Paris, France 1 [22] Filed: June 27, 1972 [21] Appl. N0.: 266,733 [57] ABSTRACT [52] U S Cl 7 2912/54 292/190 292/300 The invention makes it possible to reduce the number [51] Eosc 3/04 EOSC 7/04 .of parts required for the production of a rotatable [58] Field I54 6 202 204 catch in which no pivot is provided. A rotatable catch I' according to the invention comprises at least two semi-circular bolts each carrying at least two semi- [56] References Cited circular orthogonal beads and two keeper housings receiving said bolts. It may be used for the closure of UNITED STATES PATENTS boxes, casings, doors, etc., and generally for the lock- El 'y 5/9 ing together of all parts coupled together or in contact ouse l,l8l,050 4/I9l6 Woodfine 1. 292 190 Me by v FOREIGN PATENTS 0R APPLICATIONS I 2 Claims, 7 i Figures PATENIEmmza lam SHEET 3 [If ,3

FIGS,

1 ROTATABLE CATCH The present invention has for its object a rotatable catch permitting two members coming into contact to be immobilized with respect to each other. I

The flat catch-bolt is already known, in which a toothed rack and apinion convert the rotation of the operating knob to ato-and-fro movement of the bolt or latch in its keepenAcatchof this type thus comprises a number of parts and must essentially comprise a pivot about which the pinion rotates.

The catch according tothe invention makes it possible to reduce the number'of partsrequired for its production and in which no pivot is provided.

It is characterized in that it comprises at least one semi-circular bolt carrying at least two semi-circular orthogonal beads, one at. the" edge of the halfcircumference, andthe other. laterally, so that the said bolt is held imprisoned with a single degree of freedom in a housing of corresponding shape formed in one of the parts to be locked-together and, inconsequence of the rotation which is given to it, becomes engaged ina symmetrical housing formed in the other part to be locked, this other. housing then behaving first like a keeper and then Iikea bolt housing when the rotation is reversed.

According. to one particularly advantageous form of constructiomtwo semi-circular. boltsare fixed together by their diameter when the. partstobe locked are in contact, sothat they constantly complete each other in this position of theparts.

Other charactetistic features and advantages of the present invention will beibrou ghtout. in the description which follows below, lififerencebeing made to the accompanying drawings, i r i which:

FIG. L is a front view of acatch according to the invention in its positionof complete closure;

FIG. 2 shows a backfview'of two semi-circular bolts shown separately antliplaced together along, their diameter; I

FIG. 3 gives a perspective view of two parts intended to be locked together according to the invention, and being brought towards each other by pivotal movement, the bolts not; being in position;

FIG. 4,shows a front view of the two parts when. they have come into contact withea'ch other;

5 are brought together due to the meeting of the parts A andB, the two grooves 6 become joined together as do also the two grooves 7 (see FIG. 4).

In the form of construction shown, the parts A and B come into contact with each other by pivotal movement in the direction of the arrows fi (see FIGS. 3 and 5 Previously, a semi-circular bolt 1 has been introduced into each semi-circular housing 5. This introduction is effected by presenting the bolt laterally to the housing, diameter to diameter, and turning the bolt towards the interior of the housing, in such manner that the bead 2 passes into the groove 6 and the bead 3 into the groove 7. Each bolt in this way becomes imprisoned in a. housing, while retaining however one degree of freedom (see arrows A, )3, FIG. 6).

When the parts A and B come into contact with each other, the diameter d of the bolts is in the alignment of the edge T of the parts A andB, and no locking action is obtained (see FIG. 6), but as soon as the bolts are rotated, either in the direction of the arrow 1; or in the direction of the arrow IS, a locking action is obtained (see FIGS. 6 and 1). In this case, the bolt housing downstream of each bolt in progressive movement becomes a keeper for that bolt.

On itsvisible face, opposite to that carrying the bead 3, each bolt is provided with anoperating projection 8, in such manner that the operating projections of the two bolts come together along the line of contact so that they can be gripped together.

Each bolt may comprise an extension in the form of a half-mushroom, of which the foot 9, coupled to the back 4 of the bolt, and the flat head 10 are respectively received in a semi-circular notch 11 formed in the centre of the housing 5 and in a semi-circular groove 12 formed in the part. 5

As may be understood from the preceding description, the rotatable catch according to the invention is particularly advantageous due to its simplicity; two

FIG. 5 is a view sirnilar to FIG. 3, with the bolts placed in position;

FIG. 6 is a viewsimilar to FIG. 4, the two bolts being then associated together by their diameter;

FIG. 7 is a profile view of a bolt.

In the form of construction show, the rotatable catch according to, the invention comprises two semi-circular identicalbolts 1. Each bolt is thus limited by a halfcircumference c and a diameter d. A head 2 is provided on the half-circumference and another bead 3 along a circular arc, forms a projection at right angles and lat erally on the back 4 of the-bolt. When the two bolts are placed together along their diameter, the two beads 2 become joined together, as dov also the two beads 3.

A semi-circular housing 5 which serves alternately as a bolt housing and, as a keepter is formed in each of the parts A and B which come into contact so as to be locked together. Each; housing having a shape corresponding to each of the boltsis hollowed with a groove 6 in order to receive a bead 210i the bolt; and a groove 7 to receive a bead 3 on the bolt. When the housings keeper housings 5 and at least one bolt 1 enable it to be produced. No pivot is provided so that this simplicity of construction is accompanied by simplicity of mounting and easy operation free from failure. The housings and bolts may furthermore be made from plastic materials, the self-lubricating properties of which are well known, whichfurther facilitates the operation of the catch.

The rotatable catch according to the invention finds an application whenever it is necessary to fasten together two pieces which come into contact, either by pivoting or by translation or by sliding, of at least one of these parts. It may be used for the closure of boxes, casings, doors, etc.,and generally for the locking together of all parts coupled together or in contact side by side.

A stud 13 may be provided on the periphery of the bead 2 of each bolt so as to become engaged in a double abutement 14 formed in the bottom of each groove 6 and thereby producing a certain blocking effect on It will of course be understood that the present invention has only been described and illustrated as a preferred example, and that equivalents may be introduced into its constituent parts without thereby departing from the scope of the said invention, as defined in the appended claims.

Claims

1. A rotatable catch permitting two members coming into contact to be locked with respect to each other, characterized in that it comprises a pair of semi-circular bolts each carrying at least two semi-circular beads, one at the edge of the halfcircumference and the other laterally, a first housing of corresponding shape formed in one of the said members to be locked together, a second symmetrical housing formed in the other of said members to be locked, one of said bolts being held imprisoned with a single degree of freedom in said first housing, the other of said bolts being coupled together with said one bolt along their diameters when said members to be locked together are in contact with said other of said bolts being held imprisoned with a single degree of freedom at least partly in said second housing, the said bolts becoming engaged in consequence of the rotation given to said bolts, in said first and second housings which then behave first as a keeper and then as a housing for the said bolts when the rotation is reversed, the said bolts cooperating in such manner as to be constantly completing themselves in locked condition of the members, said two bolts further comprising operating projections which come together along the line of contact of the parts so that they can be gripped together.

2. A rotatable catch permitting two members coming into contact to be immobilized with respect to each other, a first housing in one of the said members, a second housing symmetrically formed in the other of said members, said rotatable catch including double bolt means simultaneously movable in one of two possible opposite directions, having two beads thereon, and having a peripheral half-circumference surface, one of said beads being formed on said peripheral surface, said bolt means with said beads being received in said housings characterized in that said housings are cup-shaped and outwardly open and that the other of said beads is formed laterally on said bolt means, said bolt means being semi-circular in shape and coupled together along diameter portions when the said members to be immobilized are in contact and which constantly complete themselves in this position of said members during their simultaneous movements, said bolt means comprising operating projections which come together along said diameters so that they can be gripped together.