US2344088A

US2344088A - Permutation and alarm lock

Info

Publication number: US2344088A
Application number: US293586A
Authority: US
Inventors: Hinnerfeldt Einer Eib Andersen
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-10-19
Filing date: 1939-09-06
Publication date: 1944-03-14
Anticipated expiration: 1961-03-14

Description

March 14, 1944. E. E. A. HINNERFELDT 2,344,088

PERMUTATION AND ALARM LOCK Filed Sept. 6, 1959 I v v up Patented Mar. 14, 1944 PERMUTA' IION AND ALARM LOCK Einer Eiby Andersen Hinnerfeldt, Kirkehoerup, Als, Denmark; vested in the Alien Property Custodian Application September 6, 1939, Serial No. 293,586 In Denmark October 19, 1938 2 Claims.

The present invention relates to an improved permutation lock, and one object of the invention is to provide a permutation which may be employed in connection with such door locks that have a bolt operated by means of a handle or knob attached to a spindle that is rotated by the said handle or knob, without any other alteration of the lock device than the removal of the said spindle and handle. Another object of the invention is to provide a construction of such a permutation device in which an axial and a rotational motion are required for the operation of the lock, said axial motion being utilized for operating a contact device in case of an incorrect adjustment of the permutation device. The invention is mainly characterized by a system of coaxially disposed rotatable shaft members each carrying on one end a knob provided with numerals or the like for determining the relative positions of the shafts that have means for preventing their displacement axially in relation to each other, but which allows the free rotational motion of the shafts independently of each other. The exterior shaft has means for connecting it to the lock bolt operating member of the look when the system of shafts are displaced axially after the correct ad- J'ustment of the shafts, while means are provided for causing the displacement of contact operating means for a contact device, when endeavours are made to displace the system of shafts axially after an incorrect adjustment of the shafts.

One manner of constructing a permutation lock according to the invention is illustrated in the accompanying drawing, in which:

Fig. 1 shows the combined permutation lock in top elevation and partly in section,

Fig. 2 is a sectional view on line II-II in Fig. 1,

Fig. 3 a sectional view on line III-III in Fig. 1,

Fig. 4 a diagrammatic view of a detail in section and Figs. 5 and 6 a modified manner of construction of a detail, seen in top and side elevation respectively, in Fig. 5 partly in section.

The members of a permutation lock according to the present invention are assembled between two end plates I and 2, that serve partly as guide plates for a movable part of the device comprising two

rods

3 and 4 that are rigidly interconnected and spaced parallel to each other by means of split rings 5 and stays 6, and partly as assembly plates for circular discs 'I that are clamped between spacing tubes 9 arranged on clamping rods 8. The

rods

3 and 4 are displaceable longitudinally in relation to the end plates, and each rod carries a lug I0 that coacts with a contact device II.

In Fig. 1 the device is shown in its inactive position, in which position it is held by means of coil springs arranged on the

rods

3 and 4 between the end plate I and the nearest stay '6. In this position the lugs ID are out of engagement with the contact devices II. The end plates I and 2 have bearings for a system of shafts comprising a spindle I3 and axially arranged therewith two tubular shafts I4 and I5. These shafts and thespindle are displaceable longitudinally as a unit, and means are provided for preventing their relative displacement longitudinally, but which allow them to rotate independently of each other. Such means are shown diagrammatically in Fig. 4, where a shaft 28 corresponding to either the shaft I4 or spindle I3 is provided with a lug 29 engaging an annular groove formed in the inner wall of a tubular shaft corresponding to either the shaft I5 or I4.

The spindle I3 and each shaft I4 and I5 carries a radially extending pin I6 that has a length and a thickness corresponding to the width and length of the split in the rings 5 and the slots in the discs I. The exterior tubular shaft I5 carries furthermore a toothed wheel II, which upon the axial displacement of the system of shafts engages the teeth of an interiorly toothed tubular sleeve member I 8, provided with a pin I 9, that is attached to the bolt of a door lock 2I of conventional construction, and from which lock the handles and handle spindle have previously been removed. By means of the pin I9 it is possible to manipulate the bolt of the door lock 2I from the inner side of the door independently of the other members of the lock device according to the invention. The spindle I3 and shafts I4 and I5 extend to the outer side of the door 20, where each is provided with a

knob

23, 24 and 25 respectively, by means of which they may be rotated independently of each other, and be displaced longitudinally as a unit. A numeral plate 22 on the outer side of the door in combination with marks on the separate knobs allows for an adjustment from the outside of the door of the members I3, I4 and I 5 in relation to each other without actuating the rings 5, and to allow the axial displacement of the system of shafts for coupling the device to the sleeve I8 and thus to the bolt of the lock 2|.

The combined permutation and alarm lock operates in the following manner. Upon rotating the

knobs

23, 24 and 25 in accordance with the predetermined code for opening the lock, each pin I6 is moved to register with the split in the adjacent ring 5 and the slit in the adjacent disc I. The system of shafts is then displaced for procuring engagement between the toothed wheel I1 and the sleeve l8, and by turning the knob 23 the door lock 2| can be opened. If endeavours are made to extract the system of shafts before the correct adjustment of the knobs is made, the pins I6 will engage the upper edge of the rings 5, and thus displace the

contact device

3, 4, H], H for closing an electric circuit.

In Figs, 5 and 6 there is shown a modified manner of constructing the rings 5. In this instance the ring is formed as a projecting flange on a circular disc 25, the flange as well as the disc having a slot through which the pin I6 can pass. The disc 26 is by means of a folded edge attached to the

rods

3 and 4 and clamped thereto by means of hook members 21 that are threaded for a nut, so that they are adjustable.

The details of construction of the above described device may be altered without deviating from the scope of the invention, the essential being that the rings are attached in such a manner that their position may be altered when desired.

I declare that what I claim is:

1. In a permutation lock, the combination of a. plurality of coaxially disposed and independently rotatable but not axially displaceable shaft members, a flat and longitudinally slitted ring member arranged slidable on each shaft, rods arranged longitudinally displaceable parallel to the axis of the said shafts, means for attaching the ring members to the said rods, a radially extending pin attached to the one end of each shaft member adjacent the ring on the shaft, permutation means attached to the other end of each shaft member for adjustment of the pins in relation to the slitted portion of the rings, and a contact lug on the said rods disposed to actuate a switch device upon displacement longitudinally of the rods when any of the pins does not register with the slitted portion of the adjacent ring.

2. In a permutation lock as claimed in the preceding claim, the combination with the slitted ring member of a circular disc, a folded edge formed along the periphery of the said disc, and hook members transversely adjustable on the displaceable rods engaging detachably with their hooked end the said folded edge of the disc.

'EINER EIBY ANDERSEN HINNERFELDT.