US1779780A - Safety lock for car doors and the like - Google Patents

Description

Oct. 28, 1930. s. PILLA SAFETY LOCK FOR CAR DOORS AND THE LIKE Filed Aug. 4, 1928 546 #14 22 ag /[d4 AQW Patented Oct. 1930 um'rso STATES ATENT; OFFICE SEBASTIANO PILLA, OF JERSEY CITY, NEW JERSEY mun LOCK non can noons AND THE m y Application filed August 4, -19538. Serial No. 297,455.

! trolling such doors to prevent the accidental opening thereof when the car, train or other vehicle is in progress; and the object of the invention is to provide a door lock and control of the classdescribed involving an electric system constituting part of or employed in conjunction with the electrically actuated door opening and closing means employed in cars or vehicles of the class specified whereby said locking and controlling means may be automatically put into operation after the doors of the car or vehicle have been closed by the usual means; a further object being to provide a door locking and controlling means of the class described wherein a plurality of doors on one or more cars in a train of cars or of a single vehicle may be secured against accidental opening from a single point of control, through the medium of a key actuated or other electrical switch; a further object being to provide a lock device adjacent and cooperating with each door to be controlled and involving a lock element adapted to be moved into inoperative position through the action of an electro-magnet in said control circuit, means being provided for normally retaining the lock element in operative position; and with these and other objects in View, the invention consists in a control system of the class andfor the purpose specified and the lock device or devices employed in said system, which is simple in construction, efiicient in use, and which is constructed as hereinafter described and claimed.

The invention is fully disclosed in the following specification, of which the accompanying drawin forms a part, in which the separate parts 0 my improvement are designated by suitable reference characters in each or the views, and in which:

Fig. 1 is a diagrammatic view illustrating the method of carrying my invention into efiect.

Fig. 2 is a sectional, detail view of one of a number of door controls which I employ, and three of which are shown in Fig. 1; and,

' Fig. 3 is a partial section on the line 3-3 of Fig. 2.

- In Fig. 1 of the drawing, I have illustrated diagrammatically, one .method of carrying my invention into effect. In said figure, 5 represents in dotted lines one car of a train, but this illustration may serve to represent a single railway car or a bus or other vehicle having one or more doors controlling admission to the vehicle, three doors 6, 7 and 8 being shown in Fig. 1, each of the doors being controlled by one of my improved locl: devices 9 constituting part of the control system.

In illustrating one use of my invention, I will refer to a conventional and standard form of door actuating mechanism employed in certain railway systems now in operation. 10 represents three door actuating mechanisms, the structure of which forms no part of my invention but which are employed to open and close the doors 6, 7 and 8 respectively through the control of an electric circuit represented by the wires 11 and 12, which lead to the respective mechanisms 10.

These wires extend to a key switch mechanism 13 wherebythe insertion of a key into said mechanism and the rotation of the same, will close or at least partially close a normally open circuit through the switch 13, said circuit being completely closed through a push button or other switch mechanism 1&

which controls the opening and closing of the doors through the mechanism 10. It will be understood that after the doors are closed through the mechanism 14, the key actuating the mechanism 13 is removed, againplacing the circuit through the wires 11 and 12 in mechanism is old and is referred to herein,

simply to clearly convey the complete operation of my improved door lock control system, which works in conjunction with the system above described and may be used in connection with other systems or for the purpose of controlling admission doors of any kind or class, it being understood that my invention is not necessarily limited to a switch mechanism 13 of a key controlled type.

. tive control lock devices 9 or to the electromagnets 17 of such devices, whereby the circuit to said electromagnets'17 is closed onl upon the completion of the circuit throug the switch mechanism 13. It will be understood that the devices 9or the magnet 17 thereof are coupled in series with the wires 15 and 16, as are also thecontrol mechanisms 10 in series with the wires 11 and 12, so that each device 9 functions separately and independently with respect to the other device.

One of the lock devices 9 is shown in detail in Figs. 2 and 3 of the drawing, and comprises a suitable casing 18 in which the electromagnet is supported, the wires 15 and 16 extending to insulated terminals or binding posts 19 and 20 from which wires 17 and 17 ex tend to the windings of the electromagnet. Pivotally supported within the casing 18 is a latch or look lever 21, the pivoted end of which is shown at 22, and this lever is provided with an enlarged plate portion 23 arranged over the pole 17 of the magnet, so that when the circuit is completed through said magnet, the lock lever 21 is drawn downwardly within the boundaries of the casing through an aperture 18' formed therein, the lever 21 being normally projected through the aperture 18" inthe casing by a suitable spring 24. supported in the casing and cooperating with the free end portion of said lever. The casing 18 has a guide pin 25 and the lever has a corresponding guide pin 26 for guiding the spring 24, which in the construction shown, is of the coil type. It will be un- 4 derstood however, that any suitable tensional means may be emplo ed for normally projecting the free en portion of the ock lever 21.

Two angle plates 21 are secured to the under face of the top wall of ,the casing 18 at each side of the aperture 18 and cooperate with the lock lever 21 to guide the same in its inward movement.

In practice, eachof the doors 6, 7 and 8 is provided on its rear or inner side edge with a projecting arm 27 arranged in the path of the lever 21 and preferably provided with a roller or other anti-frictional means 28, ermitting the 'free passage of the member 2 over the upper beveled surface 21 of the latch lever 21 in the operation of closing the door. It will be understood that each of the devices 9 is arranged at one side of the door as clearly seen in Fig. 3 of the drawing, and supported in connection with the door frame of the car structure in any desired manner.

I also preferably provide the outer side face of the casing 18 with an aperture 29 preferably of the key-hole type through which a key or other tool may be passed and brought into engagement with the enlargement 23 to forcefully move the lever 21 downwardly against the tension of the spring 24 should it be de sired to open anyone of the doors independently of the control through the switch 13 by an authorized party.

In carrying my invention into effect, it will be understood that the doors 6, 7 and 8 are opened and closed in the usual manner and when in closed position are retained in a definitely locked state by virtue of the levers 2l;of all of the devices 9 engaging the arms 27 on the respective doors, or the rollers 28 on said arms. Thus when the car or vehicle is in operation, the doors cannot accidentally be forced or thrown open by the sudden stopping or starting of the vehicle or by stresses or strains a pl1ed thereto unconsciously by persons leaning against said doors or otherwise applying pressure thereto.

However, in the operation of opening the doors through the usual mechanism, the completion of the circuit through the switch 13 which is the first step necessary to put the mechanisms 10 in operation, will complete the circuit through the wires 15 and 16 and thus through all of the electro-magnets 17, drawing the levers 21 inwardly, permitting the doors 6, 7 and 8 to move inwardly over said levers. As soon as the circuit is broken through the switch 13, the levers will be released to again automatically lock the respective doors, and this may be done prior to the closing of the doors if desired, it being understood that the doors are free to pass inwardly over the beveled surfaces 21 of the levers, moving the levers 21 inwardly under the compression of the springs 24 in this operation. 1

In the use of my invention on railway trains, it will be understood that the circuits through the wires 11 and.12, and 15 and 16 may extend to two or more cars of the train and to similar mechanism or devices controlling one or more doors on each car of the tram, all controlled from a single point in one car where the switch'mechanisms 13 and 14 are located.

It will also be understood that as is a common practice with trains having a multiplicity of cars, the control systems may be divided into two or more groups or sections controlled from two or more points, each group or section controlling a predetermined number of cars of the train. It will also be apparent that my invention is not necessarily limited for use in conjunction with a door operating or opening and closing mechanism of any specific kind or class, the distinctive feature of the invention residing in a system controlling one, two or more doors from a single point for the purpose of maintaining said doors in locked position at all times.

While I have shown certain details of construction for carrying my invention into effect, it will be understood that I am not necessarily limited to these details and various changes therein and modifications thereof may be made within the scope of the appended claims without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a door control of the class described, a door lock device comprising a casing, a member movably supported in said casing and adapted to be projected through one wall thereof to engage a door to be controlled thereby, tensional means for normally supporting said member in projected position, an electromagnet in said casing and arranged to cooperate directly with said member whereby the completion of the circuit through said magnet will operate to move said member into tihe casing to permit the free movement of said oor.

2. In a door control of the class described, a door lock device comprising a casing, a member movably supported in said casing and adapted to be projected through one wall thereof to engage a door to be controlled thereby, tensional means for normally supporting said member in projected position, an electromagnet in said casing and arranged to cooperate directly with said member whereby the completion of the circuit through said magnet will operate to move said member into the casing to permit the free movement of said door, and that part of said member projecting through the casing being beveled, permitting the free movement of the door relatively to said member in one direction in the operation of moving the door from an .open to closed position.

. 3L In a door control of the class described, a door lock device comprising a casing, a member movable su ported in said casing and adapted to be projected through one wall thereof to engage a doorto be controlled thereby, tensional means for normally supporting said member in projected position, an electromagnet in said casin and arranged to cooperate directly with sai member whereby the completion of the circuit through said magnet will operate to move said member into the casing to permit the free movement of said door, that part of said member projecting through the casing bein beveled permitting the free movement of t e door relatively to said member in one direction in the operation of moving the door from an open to closed position, and means whereby a key may be inserted into the casing to engage said member to move it into said casing.

' 4. door lock device of the class described adapted to be arranged in the path of movement of said door and to cooperate with the inner side portion thereof, said device comprising a p vot member, tensional means cooperating with said member to normally support the same in the path 01 movement of the door to check the opening thereof, means involving an electromagnet arranged to directly cooperate with said member whereby the completion of the circuit through said magnet will cause said member to move into moperative position out of the path of movement of said door, and the surface of said member exposed to the door in the sliding movement thereof being beveled.

5. A door lock device of the classdescribed adapted to be arranged in the path of movement of said door and to cooperate with the inner side portion thereof, said device comprising a pivot member, tensional means cooperating with said member to normally support the same in the path of movement of the door to check the opening thereof, means 1nvolving an electromagnet arranged to directly cooperate with said member whereby the completion of the circuit through said magnet will cause said member to move into inoperative position out of the path of movement of said door, the surface of said member exposed to the door in the sliding movement thereof being beveled, and antifrictional means on the door cooperating with said member.

In testimony that I claim the foregoing as my invention I have signed my name this 2nd day of August, 1928.

' SEBASTIANO' PILLA.

ios

Images