Door fastener

A fastening device for a door permits the actuation thereof by a handle, a locking element, or a key of normal kind. A bearing, fast to the wall of the door, can receive either a standard shaft, or a lock cylinder, or again a shaft having a head of particular shape, each of these three members being associated with a same operating handle and a same bolt.

The invention relates to a fastener for a door or the like comprising: a 
bearing fast with the wall of this latter, a rotary lock operating member 
pivoted in this bearing and having a first extremity accessible from one 
side of the wall of the said door and a second extremity placed at the 
opposite side and equipped with a bolt, and a handle for operating the 
lock and the door disposed about the first extremity of the lock operating 
member. 
BACKGROUND OF THE INVENTION 
This kind of device which finds its principal use in the closing of doors 
of cabinets containing apparatus for control of industrial electrical 
installations, is known for example from the French Pat. No. 1275620, 
wherein the locking member described can be actuated when the key is 
introduced into an associated lock. 
Such installations are nevertheless subjected to handling by service or 
maintenance personnel whose respective competence is not equal, and it 
thus becomes of importance either to be able to prevent certain access, or 
to limit these occasions of handling to only certain cabinets, or again to 
permit any person to handle them when these cabinets contain only 
apparatus or circuits which are not dangerous. 
The concern for rationalisation and normalisation of industrial apparatuses 
formulated by the users moreover leads the manufacturers to provide 
products having comparable functions and capable of being manufactured 
starting from elements which are as standardised and are as few in number 
as possible. 
OBJECT OF THE INVENTION 
The invention accordingly proposes to provide a fastening device in which 
the number of elements will be reduced, and in which the simple choice of 
an operating member, among a limited number of models, will permit to 
render the operation thereof possible, either by any person, or by those 
holding a normal key, or again by those who possess a special key. 
SUMMARY OF THE INVENTION 
According to the invention, this result is obtained by means of the fact 
that: 
the handle can assume either a first state for which an angular movement 
with respect to the wall can be effected between two extreme positions, or 
a second state for which this handle is immobilised with respect to the 
said wall, 
the bearing is formed to receive either a first type of lock operating 
member having means for coupling with the said handle, or a second type of 
lock operating member not having any means for coupling with the said 
handle and provided with a head of special shape adapted to receive a 
removable tool of normal shape, 
and that the handle has, on the one hand, a cylindrical opening traversed 
by the lock operating member, and on the other hand a housing coaxial with 
the opening provided with notches disposed in such a manner that the said 
coupling means cooperate with the notches when a first lock operating 
member is disposed in the bearing, and that the said head of special shape 
is placed in the said housing when a second lock operating member is 
disposed in the bearing.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
The wall 1 of a door, or other closure panel, visible in FIG. 1, is 
provided with an opening 25 such as that shown in FIG. 2, the periphery of 
which comprises two circular portions 22',22 and two parallel portions 
23,24. 
A bearing 2 which passes through this opening is angularly fast with the 
wall by means of flats 23,24 and is made axially fast with the aid of a 
nut 13 engaged on the threaded portion 12 of the bearing, and of a collar 
5 placed at the external face of the wall. 
This bearing comprises a cylindrical opening 10 which passes through it, 
and a throat 11 parallel to the axis of the bearing. The collar 5 which 
has a generally annular shape comprises at its periphery a first 
circumferential cutout 7 extending over an angular portion determined by 
the stops 8 and 9, and a second cutout 6 of small width. 
An operating handle 14 shown in FIG. 4 and comprising for example two arms 
48,49 has a cylindrical opening 16 and a cylindrical housing 15 coaxial 
with the opening and of greater diameter than the latter. The base 19 of 
this housing has a radial notch 20 while the region of the said housing 
opposite to the base and opening at the surface 70 of the handle comprises 
two diametrically opposed cutaways 17,18. The side of the handle opposite 
to the surface 70 (see FIG. 1) comprises a bearing surface 21 intended to 
bear on the collar 5 and a cylindrical skirt 26 which bounds an internal 
space 27 intended to receive the collar; the base 50 of this space 
receives a pin 71 which is parallel to the axis of the bearing and which 
is placed at such a distance from the latter that it can enter one of the 
cutouts 6 or 7, see likewise FIG. 3. 
When the handle is presented in such a manner that the pin enters the 
cutout 7, the handle is in a first state which permits its angular 
displacement in the direction F.sub.o or F.sub.f, the pin coming up at the 
end of its movement against the stops 8,9 into positions represented by 71 
(I.sub.o) and 71 (I.sub.f) in FIG. 3. 
On the other hand, when the pin is placed in the cutout 6 in position 71 
(II), the handle is then in a second state for which any angular 
displacement with respect to the wall is prevented. 
The two elements which have just been described will always be used in the 
different modes of construction of the fastening device, each calling for 
a different locking member. 
Referring to FIG. 1, it can be seen that a first lock operating member has 
been introduced into the handle and into the bearing. This first member 29 
comprises a cylindrical portion 31 pivoted in the bearing, a cylindrical 
head 30 of greater diameter which becomes placed in the housing 15 and 
gives axial support of the handle in cooperation with the plane portion 33 
of a bolt 34 which is supported by means of a squared opening 53 joined to 
a square-based prism 32 placed at the extremity opposite to the head; a 
nut 36 engaged on the threaded portion 35 of this extremity provides the 
locking of the assembly. 
Furthermore, two diametral ears 27,28 of the head 30 engage into the 
respective cutaways 17 and 18 and thus assure an angular coupling of the 
handle and of the locking member. 
The actuation of the handle causes therefore the rotation of the lock 
operating member and, consequently, of the bolt between the limits defined 
above. 
In this type of construction, the notch 20 and the groove 11 do not have 
any function and the device can be operated and put into use by any 
person. 
In another type of construction, with which the handle is always in the 
first state, and illustrated in FIG. 5, the first member is constituted by 
a locking cylinder 72 comprising a cylindrical barrel 41, a square 42 and 
a threaded portion 45 of external dimensions identical to those of the 
parts 31,32,35 which have just been described. 
On the other hand, the collar 40 which places itself in the housing 15 does 
not extend up to the level of the notches, and has a tenon 44 which 
engages through the notch 20; furthermore, the barrel 41 is equipped with 
tumblers 43 serving to engage in the groove 11 of the bearing in a 
predetermined relative position of these elements, in the absence of the 
key. 
A key 73 can be introduced into the cylinder and is then orientated, by 
reason of the cooperation between 20 and 44, in such a manner that its 
operating portion 39 engages its opposed edges 37,38 in the cutaways 
17,18. 
The angular coupling between the lock operating member 72 and the handle 
which has been partially assured by 20 and 44 is thus completed by the 
engagement of the edges 37,38 in the notches and permits the transmission 
of a large turning couple to the lock operating member. 
It is clear that the tumblers 43 will be able to engage in the groove 11 
for one of the positions of the handle defined by the stops 8,9. 
Finally, in a last kind of setting up illustrated in FIG. 6, and for which 
the handle is placed in its second state, the lock operating member is 
constituted by a member 74 comprising a prismatic head 46 which can assume 
one of the shapes shown in FIGS. 7a,7b or 7c, a collar 47 and finally a 
cylindrical portion 51, a square 52 and a threaded portion 55 of the same 
dimensions as the similar members described in the preceding examples. 
The head 46 which is placed, as well as the collar, in the housing 15 can 
likewise assume the shape 58,59,60,61 shown in axial view in FIG. 7d in 
order to be able to be actuated by a normalised key by a stranger 
(62,63,64,65,66) such as that visible in FIG. 8 whilst the shapes 46,56,57 
illustrated in FIGS. 7a,7b,7c correspond to those which are normalised for 
certain applications or adopted in certain domains of industry. 
In this latter kind of set up, in which the handle is immobilised, only the 
holder of an appropriate normalised key will be able to open the door. 
As the rotation of the lock operating member must be limited, it is 
necessary to dispose between this latter and the bearing, or between this 
latter and the handle, means appropriate therefor; the cylindrical portion 
51, see FIG. 6, can for example comprise a lateral stop 67, moving in an 
angular cutaway 69 formed at the end 68 of the bearing, see likewise FIG. 
9. 
A bearing thus comprising both this circular groove 69 and the straight 
groove 11 is capable of receiving any one of the lock operating members 
described above. 
This fastening device thus comprises only a limited number of elements 
amongst which, on the one hand, five (including nuts 13,36) are always of 
the same kind, and on the other hand only the sixth needs to be selected 
among a small number of models to fulfill the function which has been 
assigned to it.