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Publication numberUS963450 A
Publication typeGrant
Publication dateJul 5, 1910
Filing dateOct 7, 1909
Priority dateOct 7, 1909
Publication numberUS 963450 A, US 963450A, US-A-963450, US963450 A, US963450A
InventorsCharles Edward Lowe
Original AssigneeWalter Carl Ellis, Claud D Ellis, Charles Edward Lowe
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 963450 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



Patented July 5, 1910.

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To all whom it may concern:

Be it known that 1, CHARLES EDWARD Lowe, acitizen of the United States, and a resident of McAlester, county of Pittsburg, State of Oklahoma, have invented new and useful Improvements in Latches, of which the following is a full, clear, and exact specification.

My invention relates more particularly to escutcheon plates to be used where a latch only is used, and is a modification of those shown in my application filed Oct. 10th, 1908, Serial Number 457,081, and like the plates there shown, comprises means whereby they may be accurately positioned with respect to the latch to bring the knob bolt hole of the latch exactly in alinement with the corresponding holes in the plates.

The plates are adapted to be used with varying thicknesses of doors and make substantially one piece with the latch casing. The plates may be used with any of the ordinary latches in common use after making the necessary changes in the facing plate. I have preferred to show the plates in connection with my latch which is shown in my application previously referred to.

Referring to the drawingsFigure 1 is a perspective view of a part of a door containing a latch and my escutcheon plates. Fig. 2 is a perspective view of one of the escutcheon plates, and the face plate of the latch. Fig. 3 is a perspective view of a slightly modified form of face plate. Fig. t is a cross-sectional View of a part of Fig. 1 taken through the line w-0c. Fig. 5 is a modification of the parts shown in Fig. 4.

The latch A is provided with the usual face plate at having screw holes I) for securing it to the door and the hole 0 for permitting the latch member (Z to extend therethrough. Upon the front of the plate a is formed the transverse recess 6 and the hole 0 is preferably centrally located within this recess. In the upper and lower walls of the .recess adjacent the bottom are formed slots ff extending the entire Width of the plate and to a suitable depth. Where the thickness of the facing plate is insufficient to allow the recess to be formed, the type shown in Fig. 3 may be used; here the wall behind the recess extends beyond the back of the plat-e, which enables a recess to be formed of the requisite depth.

The escutcheon plate B may be of any de- Specification of Letters Patent.

Application filed-October 7,

Patented J 'uly 5, 1910.

1909. Serial No. 521,560.

sirable form, but I have preferred to show it round and terminating in a strip g. At the center of the plate is the hole It to receive the bearing for the knob spindle a. Any convenient form of bearing may be employed, as for instance that shown in my application already referred to. The bearing used here is however somewhat different; upon the plate is formed a hub 7' extending for a suitable distance beyond the plate and within it is the loosely fitting bushing 74 having flanges Z-Z at either end extending outward to retain it in place. The inner end no of the bushing is made solid and through it is formed a square hole a into which passes the knob spindle, the ends of which are secured in similar holes in the knobs 0 in the usual way. The knobs fit snugly within the bushings 7; and abut against the shoulders 79, or if there is any play this may be taken up in the usual way by one Or more washers g. This mechanism holds the knobs securely in position and prevents their undesirable rattling and tilting downward, which is usual, especially with heavy knobs.

The plate 13 with the strip 9 sets out upon the door, but near the edge of the door the strip is offset forming the part '1. This is mortised in the door to make a flush joint, to permit the door when shut to come properly against the door stop. The strips are here bent over at right angles forming the lips s, which are of a size to fit snugly within the recess 6 of the face plate and to make a flush joint therewith. With the minimum thickness of door the lips should come to the center ofthe face plate. The lips are cut out forming the notches t to permit their fitting about the latch to the center line of the face plate. On the upper and lower edges of the lips adjacent the ends are lugs uu positioned for engagement within the slots ff which secure the escutcheon plates firmly in position. The two plates may be made similar except the corresponding parts are oppositely disposed. In the case of a door of minimum thickness the lips come together at the center of the face plate but with wider doors there will be more or less space between the lips depending upon the thickness of the door in any instance. hen this space becomes too great, a larger latch should be used, which will have escutcheon plates with lips correspondingly longer.

Having thus described my invention I claim y 1. In a mortise door latch a face plate, a transverse recess in the front of the plate, an opening in the plate at the center of the recess for permitting the latch to project,

, from the upper and lower edges near the free ends of the extensions adapted for engagement Within the grooves of the face plate. a

. 2. In a mortise door latch a face plate, a transverse recess in the front of the plate,

an opening in the plate at the center of the recess for permitting the latch to project, grooves in the upper and lower Walls of the recess, an escutcheon plate on either side of the latch, an extension on the front edge of each plate and in the same plane therewith, inwardly offset ends to said extensions, right angular terminations to said extensions, a notch formed in the free end of each extension half the size of the hole for the latch, and lips projecting from the upper and lower edges near the free ends of the extensions adapted for engagement within the grooves of the face plate.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2653843 *Jun 27, 1949Sep 29, 1953Adams Rite Mfg CompanyLock housing
US2664181 *May 13, 1948Dec 29, 1953Earl BoughtonHollow metal door construction
US2952150 *Jul 23, 1956Sep 13, 1960Harry MatzkinGlass door locking construction
US3666309 *Oct 13, 1969May 30, 1972Zarzycki Vincent FCover for door lock assembly
US4673204 *Apr 19, 1985Jun 16, 1987M.A.G. Engineering & Mfg. Co., Inc.Interlocking protective door shield
US5666830 *Jun 23, 1994Sep 16, 1997Litvin; NoelSecurity lock, with free opening from indoors
Cooperative ClassificationE05B15/02