US2797570A

US2797570A - Improvements in and relating to locks

Info

Publication number: US2797570A
Application number: US354997A
Authority: US
Inventors: Fresard Marcel; Huber Max
Original assignee: Mefina SA
Current assignee: Mefina SA
Priority date: 1952-05-20
Filing date: 1953-05-14
Publication date: 1957-07-02
Anticipated expiration: 1974-07-02

Description

July 2, 1957 Filed May 14, 1.95:5

V M. ERESARD ETAL ,7 IMPROVEMENTS INAND RELATING TO LOCKS I 3 Sheets-Sheet 1 INVENToR-S Marcel Fresard Max Huber.

-A'TTORNEY M. FRESARD arm. 2,797,570

xupaovsusms IN AND RELATING TO LOCKS July 2, 1957 3 Sheets-Sheet 2 Filed May 14, 1953 ATTUP NEY In the first form of construction of the bolt shown in Figs. 1 to 3, the catch bolt is bevelled so as to permit the automatic closure of the door no which the bolt is mounted without it being necessary to utilize either the key 14 or the operating knob 16.

In the normal position of the catch bolt,'the rod 9 is held by the spring 11 in contact at its edge with two

fingers

31 and 32 secured to the operating knob 16. The two

fingers

31 and 32 are diametrically opposed relatively to the axis of rotation of the knob 18 and project into the casing 17.

The edge 30 of the rod 9 is smooth over a predetermined length so as to enable the rod 9 to slide against the

fingets

31 and 32 in the normal position of the bolt so as to allow the catch bolt to telescope into the interior of the casing when closing the door.

The catch has a finger 33 and also two pins 34 and 35 and the operating knob has four

pins

36, 37, 36a, 37a. The pin 34 of the catch and the pin 36 of the knob are adapted to co-opcrate independently of one another with a stop 38 provided on the rod 9 so as to withdraw the catch into the casing 17 against the action of the spring 11, for the purpose of opening the door, The stop 38 is formed, in this form of construction, by a pin secured transversely in the rod 9 and projecting to opposite sides of this.

Fig. 2 makes it possible to see clearly the meth'bd of operation of retraction of the catch 1 into the casing 17. In fact, it sufiices, as will be seen in this figure, to turn the catch 12 about a quarter of a revolution in the direction of the arrow 39 so as to cause the pin 34 to move, through the pin 38, the rod 9 and the catch bolt 1 in a movement of translation in the direction of the arrow 40. An identical movement of translation may be produced by turning the knob 16 through about a quarter of a revolution, by reason of the pin 36 then co-operating with the other end of the pin 38.

The normal position of the catch bolt 1 is determined by a projection 41 provided on the rod 9. The normal position of rest of the catch bolt 1 is in fact determined by the coming into contact of said projection 41 with the finger 31 which is the finger of the knob 16 farthest removed from the catch bolt 1.

The driving in rotation, either of the catch 12, or of the knob 16 in the direction of closing, that is to say in a direction opposite to that indicated by the arrow 39, from thenormal position shown in Fig. 2, produces the disengagement of the projection 41 of the finger 31 which serves as a stop for the latter. When this disengagement has taken place, the spring 11, by acting on the rod 9, maintains this in contact with the finger 33 of the catch, thus producing a movement of oscillation and of translation of the rod, pushing the catch bolt 1 to the outside of the casing. When the finger 33 resumes the position shown in Fig. 2, the projection 41 engages between the

fingers

31 and 32 of the knob 16. The catch bolt 1 has thus been moved outwardly a distance equal to that separating the centres of the two

fingers

31 and 32 and its closing position is determined by the engagement of the projection 41 between the

pins

31 and 32, said engagement preventing the catch bolt 1 from being pushed into the interior of the casing 17 by acting directly thereon in the direction of the arrow 40.

On the other hand, in this first form of construction, the operating knob is provided with a locking member adapted to co-operate with the casing so as to enable the catch bolt to be locked in the retracted position.

The locking member is formed by a plunger piston 42 sliding in the knob 16 and of which the inner end has a groove 43. The end of the piston provided with the groove 43 is capable of being engaged in one of four holes 44 in the casing against the action of a spring 45 when the operating knob is in the position producing the retraction of the catch bolt 1 into the interior of the casing, as is clearly shown in Figures 7-10, inclusive.

As in this position, the spring 11 tends to return the catch bolt into its normal position, the action of the spring 11 causes the piston 42 to remain engaged by reason of its groove 43 in the corresponding hole 44. It sufiices for releasing the knob 16 to cause it to turn in the opening direction so that the piston 42 resumes its normalposition under the action of its spring 45.

It is to be observed that ribs 46 are formed in the base plate 2 so as to form sliding tracks for the catch bolt 1, while at the same time forming rigidity ribs on the base plate 2. Further, bosses 47 are provided on the said part 21 for guiding the catch bolt 1 when this is positioned, relatively to the casing, in a reverse position to that shown in Fig. 1.

The second form of construction of the bolt shown in Figs. 4 and 5 is similar to the first form of construction In fact, it is composed of the same parts, except as regards the part 3 of the catch bolt 1 and the control 9 thereof.

The catch bolt 1 is no longer bevelled, but is of classical parallelepiped shape. I

The rod 9 is always in the form of a channel but the edges thereof are cut in the form of teeth, in such a manner as to form a rack. Further, as the spring 11 must only act transversely on the rod 9 for maintaining this in contact with the two

fingers

31 and 32 of the knob 16, said spring is no longer hooked to the free end of the rod, but to the middle part thereof. Further, the pin 38 is omitted.

The operation of the second bolt is as follows:

Normally, the

fingers

31 and 32 of the operating knob 16 and the finger 33 of the catch 12 engage with notches of the rod or rack 9. Each rotation through a revolution of the catch 12 produces a movement of oscillation of the rack as also a translation thereof which is transmitted to the catch bolt 1 by means of the pin 10.

It is to be observed that for one turn of rotation of the catch 12 only a half of this turn produces a movement of the catch bolt 1.

On the contrary, when operating the bolt by means of the knob 16, a half a turn thereof is suflicient to move the catch through a distance corresponding to one turn of the key.

In this second form of construction, the

locking device

42, 44, 45, is no longer necessary, in view of the fact that the catch is held in a stable manner in its three positions, that is to say the retracted position in the interior of the casing 17, the closing position by one turn of the key, which is that shown in Fig. 5, and the closing position by two turns of the key.

The third form of construction shown in Fig. 6 is only a modification of the second. In fact, this third form of construction has the same elements as that of the second, only the operating knob 16 is omitted. In this case, the two

fingers

31 and 32 are secured relatively to the casing 17.

The bolt can therefore only be actuated by the key and its operation is identical with that of the second form of construction.

As above described, the mounting of a lock provided with a bolt such as those above described, is more rapid than the mounting of a lock of the same type of known construction. In fact, as the cylinder device can be secured, for example on a door, by using directly the base plate 2 of the bolt housing instead and in place of the plate generally used, once the cylinder device has been fixed it is sufiicient to adjust the casing 17 on the base plate so that the mounting of the complete lock is effected.

Various modifications in construction may be applied to the bolts described.

The

axial guide elements

5 and 7 of the catch bolt 1, instead of being cast as a unit with the base plate 2, may be made separate therefrom.

The cross-section of the elongated part 4, instead of being round, may be of any other shape, for example polygonal.

In a further modification, the spring 11, which is of the coiled type, is replaced by a spring of a difierent type.

We claim:

1. A lock adapted to be mounted against a door surface and to permit closure with a double turn of a key, comprising, in combination, a base plate including a rim at one end thereof, said rim having an opening therethrough, said base plate having a bent portion having a bore therethrough, said bore being positioned opposite to said opening through said rim, a catch bolt having a substantially parallelepiped shaped portion and an elongated portion, said former portion being slidably positioned in said rim at the said opening and the latter portion being slidably positioned in said bent portion at the said bore, said latter portion being smaller in cross-sectional area than said former portion, said former portion being greater in cross-sectional area than said bore, whereby said bent portion having said bore can act as a stop for said former portion, track means on said base plate for guiding said catch bolt, a channel-shaped connecting member operatively connected to said elongated portion of said catch bolt, means mounted on said base plate and in contact with said connecting member for moving said connecting member, said means including a catch member, a spring means for holding said connecting member in contact with said catch member, said spring means being operatively connected to said connecting member and to said base plate, a bolt casing secured to said base plate, said casing being positioned about said substantially parallelepiped shaped portion and the said elongated portion of the catch bolt, said bent portion of said base plate, said track means, said connecting member, said catch member, and said spring means, a rotatably mounted operating knob mounted on said casing, at least two finger members secured to said knob, said fingers being diametrically opposed relative to the axis of rotation of said knob and projecting into the said casing and slidably contacting said connecting member, whereby the catch bolt cantelescope into the interior of the casing when the door is closed, a driving member operatively connected to said catch member, said driving member being mounted on said base plate, and a locking device operatively connected to said driving member, whereby said locking device can actuate said connecting member and thus said catch bolt through the medium of said driving member which actuates said catch member.

2. A lock adapted to be mounted against a door surface, comprising, in combination, a base plate including a rim at one end thereof, said rim having an opening therethrough, said base plate having a bent portion having a bore therethrough, said bore being positioned opposite to said opening through said rim, a catch bolt having a substantially parallelepiped shaped portion and an elongated portion, said former portion being slidably positioned in said rim at the said opening and the latter portion being slidably positioned in said bent portion at the said bore, said latter portion being smaller in cross-sectional area than said former portion, said former portion being greater in cross-sectional area than said bore, whereby said bent portion having said bore therethrough can act as a stop for said former portion, a connecting member operatively connected to said elongated portion of said catch bolt, means mounted on said base plate and in contact with said connecting member for moving said connecting member, said means including a catch member, a spring means for holding said connecting member in contact with said catch member, said spring means being operatively connected to said connecting member and to said base plate, a driving member operatively connected to said catch member, said driving member being mounted on said base plate, and a locking device operatively connected to said driving member, whereby said locking device can actuate said connecting member and thus said catch bolt through the medium of said driving member which actuates said catch member.

References Cited in the file of this patent UNITED STATES PATENTS 1,523,346 Murmann Jan. 13, 1925 1,727,054 Farnsworth Sept. 3, 1929 2,268,743 Falk Jan. 6, 1942 2,296,020 Carter Sept. 15, 1942 2,418,044 Nehls Mar. 25, 1947