US 1165542 A
Description (OCR text may contain errors)
0. 5. SCHNERRE. ELECTRIC DOOR L'OCK. APPLICATION FILED'OCT. 18. 1913. 1,165,542. Patented Dec. 28, 1915.
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OTTO B. SCHIQTERRIELv OF GALENA, ILLINOIS.
Application filed fletober 18, 1913. Serial No. 796,030. I a
To all whom it may concern:
Be it known that I, OTTo B. SGHNERRE, a
citizen of the United States, residing at Galena, in the county of Jo Daviess and State of Illinois, have invented certain new and useful Improvements in Electric Door- Locks, of which the followingis a specification.
This inventiorijrelates to an improved electrically operated door lock or latch, and the primary object of the invention is to provide a key operated door latch or latch wherein the locking bolt is slid or operated through the instrumentality of an electromagnet, the latter being arranged in .such relation to the said bolt as to attract and actuate the same should the electric circuit be closed.
The invention further contemplates the provision of' means embodying a pair or plurality of contact plates, certain of which are carried by the door, and others by the door casing, thesaid plates being so arranged as to close the electric circuit and operate the latch during a door closing op eration, the locking bolt being automatically actuated or retracted by reason of such engagement of the said plates.
A still further object of the invention resides in the provision of means embodying an electric switch or button arranged adjacent the key operated switch, and so connected therewith as to provide for the closing of the electric circuit, the said key having been previously inserted in the easing provided therefon.
The-above and additional objects are accomplished by such means as are illustrated in their preferred embodiment in the accompanying drawings, described in the following specification and then more particularly pointed .out in the claims which are appended hereto and form a part of this application. 7
In describing my invention in detail reference will be had to the accompanying drawings wherein like characters denote like or "corresponding parts throughout the several views, and in which:
Figure 1 is an elevation, partly in section, v
of a door lock or latch constructed in ac cordance with the present invention; Fig. 2 is an enlarged section on the line 2-2 of Figfl, and Fig. 3 is a detail elevation of a magnetized key employed 'in connection with the present invention.
Referring now to the drawings wherein is illustrated the preferredembodimentof my invention the numeral 1 designates the door casing and 2 the door, the latter having secured thereto in any suitable manner a lock casing designated 3 and indicated by the dotted lines in Fig. 1 of the drawings.
' A bolt 4 is mounted for sliding movement .Wltlllll the casing 3, the said bolt being supported in the desired manner by means of apair of spaced apart brackets 5. At the inner end of the bolt 4 I provide an expans on spring 6, the tension of which normally maintains the said bolt 4 in extended posit1on with the free end thereof projected beyond the edge of the door 2 and within the keeper 7 provided therefor, the latter being fixedly secured to -the door casing 1 a by screws 8 or other fastening elements of a suitable nature. Intermediate the ends of the bolt 4 an elongated aperture or opening 9 is provided, through which the vertically extended portion 10 of an operating bolt 11 extends, the said bolt being supported in operative relation with the locking bolt 4 through the medium of brackets 1-2. Within the casing 3 and disposed for engagement with the inner end of the bolt 11, I provide a Stop lever 13 pivoted as at 14 and provided-with an extension 15 disposed for engagement with a lug 16 projecting from the lower edge of the sliding bolt 4 by means of which the said'lever is actuated during an unlocking operation. An enlargement 16 is formed upon the opposite end of the bolt 11 from that engaged by the lever 13, the said enlargement being disposed in spaced relation and in alinement with an electro-magnet 17 through. the instrumentality 'said bolt 11 is actuated.
I F ixedly secured to the door 2 without the casin/ I provide a switch casing 18 having a key slot or opening 19 formed therein through which. a-imagnetized key 20 is insert'ed. lVithin the casing 18 and at one side of the key slot 19, a pivoted switch lever 21 is disposed, pins 22 and 23 disposed respectively one uponeach side ofthe said lever to limit the pivotal movement thereof. A springf'2d is provided to normally maintain the said lever in engagement with the pins 22, the purpose xii which will subsequently 'appe'ar. At a point adjacent the casing 18 I provide an electricswitnh of the push button type25, the said button adapted toof, which thebe actuated in connection with the lever 21 k the keeper 7, the magnetized key 20 is instarted within the slot 19 provided therefor. By turning the key slightly to the right, the lever 21 is attracted and thrown into engage ment with the pin 22, which engagement closes the electric circuit between the magnetic coil 17 and the button 25. The lever 21 having been actuated, the button 25 is operated to completely close the electric cir- 'cuit and energize the magnetic coil 17, and attract the operating bolt 11 to slide the same within the bracket 12 provided therefor. The vertically extending portion of the operating bolt 11 being within the aperture 9 of the operating or locking bolt 4, it is apparent that the said bolt, during a sliding movement of the bolt 11, is attracted against the tension of the spring 6 and the extended end thereof withdrawn from engagement with the keeper 7, the lugs 16, at
the same time, swinging the lever 13 upon its pivot 14 thereby permitting an opening of the door. By relieving the pressure upon fixedly secured to the outer face of the door and connected to the magnetic coil 17 by suitable wiring. A third contact plate 28 is fixedly secured to the casing 1 in such relation to the plate 27 above mentioned as to frictionally engage the said two plates, thereby closing the electric circuit 'therebetween should the said first mentioned plate be thrown into engagement therewith. As the three plates engage, the coil 17 is energized and the bolt 11 attracted thereby actuating the locking bolt 4 and attracting the said bolt from engagement with the keeper 7 and from its normal extended position be yond the edge of the door 2. The switch devices 18 and 25 are mounted on the outside of the door, while the lock mechanism and the keeper 7 are mounted on the inside of the door. The contacts 27 and 28.are'a1so mounted on the inside of the door, the door opening inwardly.
From the above, taken in connection with the-accompanying drawings it will be seen that the contact plates are so positioned as to engage one another sligatly in advance of V the complete closing of the door thereby withdrawing the bolt 4 from its extended position to provide for a non-interference of the keeper 7 therewith; that the disengagement of the plates 27 and 28, will automatically break the electric circuit and permit the spring 6 to return the said bolt to its normal, extended position and into the keeper 7 provided therefor; and that an unlocking of the door can-only be efiected by first swinging the lever 21 into engagement with the pins 22 by inserting the'key '20 in the casing 18 provided therefor, and previously operating the button 25 to close the electric circuit.
The lever 1d not only acts as a retaining element for the operating bolt 11, but also serves as a guide therefor during the actuationof the locking bolt 4:- I
' In reduction to practice, I have found that the form of my invention, illustrated in the drawings and referred to in the above description, as the preferred embodiment is the most efiicient and practical; yet realizing that the, conditions concurrent with the adoption of my device will necessarily vary, I desire to emphasize the fact that-various minor changes in details of construction,
proportion and'arrangement of parts may be resorted to, when required, without sacrificing any of the advantages of my in vention, as defined in the appended claims.
Having thus fully describedmy invention, what I claim as new and desire to secure by Letters'Patent, is
1. In an electrically operated switch lock,
the combination with the lockingbolt, of a stationary structure, a structure adapted for opening and closingmovement with respect to said stationary structure and to which said locking bolt is attached, a keeper on said sta'tionary structure to engage with said locking bolt, an electrical circuit, contact devices withinsaid circuit adapted for engagement to close said circuit immediately preceding the time at which said movable structure is closed, and a means in said circuit to actuate said locking bolt.
2. In an electrical switch-lock, the combination with the locking bolt, of a stationary structure, a movable structure adapted for opening and closing movement with respect to said stationary structure and to which said locking bolt is attached, a keeper on which thelocking member is attached, retaming means on the stationary structure with which the locking member is normally.
engageable, an electrical circuit, an electromagnetic device within said circuit, means operating automatically through movement of said movable structure to close the electrical circuit and energize said magnetic device. the said magnetic device being so arranged relatively to the locking member as to withdraw said member from engagement with its retaining means, and a switch 1 device arranged .within the electrical cir- 15 cuit to provide for manual closing of said circuit, as and for the purpose set forth.
In testimony whereof I affix my signature in presence of two witnesses.
OTTO B. SCHNERRE.
T. H. SGHNERRE, HENRY STRoH MEYER.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G.