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Publication numberUS975675 A
Publication typeGrant
Publication dateNov 15, 1910
Filing dateMar 12, 1910
Priority dateMar 12, 1910
Publication numberUS 975675 A, US 975675A, US-A-975675, US975675 A, US975675A
InventorsEugene J Bumiller
Original AssigneeEugene J Bumiller
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 975675 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



Patented Nov. 15, 1910.

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lj/Af/a filmy Wl ifzasidexsi- EUGENE J. BUMILLER, OF CHICAGO, ILLINOIS.


Specification of Letters Patent.

Application filed March 12, 1910.

Patented Nov. 15, 1910.

Serial No. 549,014.

To all whom it may concern:

Be it known that I, EUGENE J. BUMILLER, a citizen of the United States, residing at Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Lock-Strikes, of which the following is a specification.

My invention relates to improvements in lock strikes and has for its object the provision of a lock strike by means of which a 'door lock shall be completely guarded against tamperin with from the outside.

The invention consists in the combination and arrangement of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanving drawing forming a part of this specification, and in which,

Figure 1 is a perspective view of a portion of a door jamb and door equipped with my invention, and Fig. 2, a partial end view of the door.

The preferred form of construction C0111- prises the usual strike-plate 1 having the usual guard flange 2 at its outer edge. In order to prevent tampering with the look from above or below additional guard members 3 are provided adjacent the top and bottom edges of strike-plate 1. As illustrated in Fig. 1 these guard members consist of angle plates having one flange secured to the door jamb by means of nails or screws 4. Channel members 5 are secured in notches in the end of the door 6 in position to receive the outwardly extending flanges of angle members 3 as the door swlngs shut. By th1s construction it will be observed that access to the door latch or bolt from above or below by means of a curved or inclined instrument is prevented as well as direct access from the outside.

lVhile I have illustrated and described the preferred form of construction for carrying my invention into effect this is capable of variation and modification without departing from the spirit of the invention. I therefore do not wish to be limited to the exact details of construction set forth but desire to avail myself of such variations and modifications as come within the scope of the appended claim.

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

In a door lock the combination with a strike-plate provided with a guard flange at its outer side; separate angle members secured to the door amb adjacent the top and bottom ends of said plate; and channel members secured in the end of the door and adapted to receive the outwardly extending flange of said angle members, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.


Witnesses 2 HELEN F. LILLIS, J OSHUA R. H. Powers.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2735711 *Apr 24, 1950Feb 21, 1956 trachsler
US2761722 *Oct 16, 1952Sep 4, 1956Daimler Benz AgLocking mechanism for motor vehicle doors
US3279840 *Sep 28, 1964Oct 18, 1966Anthony BaroneTamperproof and burglarproof shield for locks, latches and the like
US3524669 *May 17, 1968Aug 18, 1970Reid Donald EBolt guard
US5628148 *Jul 8, 1994May 13, 1997Beutler; BrucePin aligning system for doors and door mounted devices
Cooperative ClassificationY10S292/39, Y10S292/55, E05B17/2003