US 2563950 A
Description (OCR text may contain errors)
Aug. 14, 1951 F. MARTIN 2,563,950
ESCUTCHEON WITH KEY GUIDE Filed Oct. 12, 1948 Patented Aug. 14, 1951 UNITED STATES PATENT OFFICE ESCUTCHEON WITH KEY GUIDE Fred Martin, Cleveland, Ohio Application October 12, 1948, Serial No. 54,044
-1 Claim. 1
This invention relates to improvements in key guides, that is to say means for guiding a door key into the key slot of a door lock, especially a door lock of the cylinder type and one calling for the use of a flat key. The key guide unit of the present invention is adapted for installation by an unskilled person and calls for the use of no tools other than a screwdriver and a small drill in case the door is built of hardwood.
One of the objects of the invention therefore is the provision of a key guide of the character stated having few parts of simple construction.
Another object is the provision of a guide carried by an escutcheon plate which may be attached to the door around the forward end of a cylinder lock to bring the guide into alignment with the key slot in the lock.
Other objects and features of novelty will appear asI proceed with the description of that embodiment of the invention which, for the purposes of the present application, I have illustrated in the accompanying drawing, in which:
Fig. 1 is a front elevational view of a fragment of a wooden door with my key guide attached thereto.
Fig. 2 is an edge view of the same, the key guide being in vertical section.
Fig. 3 is an exploded view with the parts shown in vertical section, and
Fig. 4 is an elevational view of the guide from the rear.
In the drawing I have shown the key guide of the invention applied over a cylinder lock I installed in a wooden door, a fragment of which is illustrated at H. Cylinder locks of the general type illustrated in some cases lie flush with the surface of the door and in some cases protrude somewhat, as illustrated herein. I provide an escutcheon of sheet metal so formed as to overlie the cylinder lock in any case. To this end the escutcheon may include a circular plate l2 which is preferably flat and a rim l3 offset rearwardly from the plate by means of a series of terraced corrugations or otherwise. The rim i3 is provided with a series of holes 14 to receive wood screws l5 for attaching the escutcheon to a door.
In the plate I! there is formed a round opening [6 shown herein as eccentrically positioned in the plate. This opening receives the key guide proper, which may be formed from bar stock as a screw machine product or may be made as a die casting. It comprises a cylindrical body ll of a diameter to fit loosely within the circular opening l6. This body is provided with a concavity it which serves to guide the key to a central position when it is inserted into 2 the guide. The body also has a slot 19 therethrough of the proper size to receive the key, indicated in broken lines at K in Fig. 2. The bottom of the concavity merges with this slot, so that when the key enters the concavity it is directed into and through the slot l9.
At the rear of the body there is a peripheral flange 20, so that when the guide is inserted into the opening Hi from the rearthe flange 20 bears against the plate 12. A peripheral groove ii is formed in the body at the proper distance from flange 20 so that when a split spring ring 22 is snapped into position in the groove the ring will overlie the plate I2, as illustrated in Fig. 2, but will permit the body I! to turn freely in the plate [2 when the key is inserted into the lock and turned to operate the lock.
The installation of the guide upon a door is very readily effected. The key is inserted through the key guide into the door lock. The escutcheon is thereby properly positioned with respect to the lock. The screws l5 may then be driven through the holes it into the door, and the guide body I! will thus be centered with respect to the lock and the key slot in the lock.
Having thus described my invention, I claim:
In combination, an escutcheon plate having a central portion and a rim ofiset rearwardly therefrom, whereby the central portion is adapted to clear a cylinder lock projecting from the surface of a door, said rim having holes therethrough for the reception of fastenings, said central portion having a circular opening therein, a key guide rotatably mounted in said opening and spaced forwardly from said rim, said guide having a hemispherical concavity in its forward face and a key slot through said guide of a width no greater than the diameter of said concavity, merging with said concavity, said concavity and said slot being adapted to take a fiat key of a width less than the diameter of the concavity, whereby when the forward end of such a key is projected into saidconcavity further pressure on the key will direct it into said slot.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 234,002 Dickerman Nov. 2, 1880 242,861 Barnes et a1 June 14, 1881 243,029 Woolaston June 14, 1881 1,437,878 Aldeen Dec. 5, 1922 1,949,406 Beach Mar. 6, 1934