US3442543A

US3442543A - Pryproof door striker

Info

Publication number: US3442543A
Authority: US
Inventors: Daniel Weyman
Original assignee: Individual
Current assignee: Individual
Priority date: 1967-08-28
Filing date: 1967-08-28
Publication date: 1969-05-06
Anticipated expiration: 1986-05-06

Description

y 6, 1969 D. WEYMAN 3,442,543

PRYPROOF DOOR STRIKER Filed Aug. 28, 1967 INVENTOR. 0/77/V/EL wfiymfi/v United States Patent 3,442,543 PRYPROOF DOOR STRIKER Daniel Weyman, 96 E. Hazelwood Ave., Rahway, NJ. 07065 Filed Aug. 28, 1967, Ser. No. 663,850 Int. Cl. Eb 15/02, 17/00 US. Cl. 292-340 1 Claim ABSTRACT OF THE DISCLOSURE 1 This invention relates generally to striker plates or door ocks.

It is generally well known that a thief can often easily gain entrance into a locked premises by inserting a celluloid strip or other flat object into a crevice between the molding around the doorway and the doorway frame, the celluloid strip being pushed inwardly against the inclined front end wall of the sliding bolt, so to cause the bolt to be withdrawn out of the doorway and striker plate openings, thus unlocking the door without requiring a key. In view of the great prevalence of sliding bolts of this design, which are of course necessary in order to make doors easily self-locking, there is a need for a burglar proof construction to be incorporated therewith.

Accordingly it is a principal object of the present invention to provide a striker plate for a door lock, the plate having self-contained means whereby a flat object inserted into a crevice between a doorway molding and doorway frame will be guided into a direction away from the bolt inclined front end wall, thus preventing the sliding of the bolt into an unlocked position.

Another object is to provide a pryproof door striker plate having a sidewardly extending lip to form a shield for the bolt, the shield being struck out from the material removed from the striker plate to form the slide bolt opening therein, the shield accordingly not generally increasing at all the production cost of the striker plate.

Yet another object is to provide a striker plate having a sidewardly extending shield which will not in any way interfere with the normal operation of the door lock.

Other objects are to provide a pryproof door striker plate which is simple in design, inexpensive to manufacture, rugged in construction, easy to use and efiicient in operation.

These and other objects will be readily evident upon a study of the following specification and the accompanying drawing wherein:

FIGURE 1 is a perspective view of the invention,

FIGURE 2 is a cross sectional view taken on line 2-2 of FIGURE 1 and shown in operative use with a door lock,

FIGURE 3 is a similar view of a modified form of the invention, showing the device in an unlocked position, and

FIGURE 4 is a view similar to FIGURE 3 showing the device in locked position.

Referring now to the drawing in detail, the reference numeral represents a striker plate according to the present invention wherein there is a rectangular, fiat plate 11 having a tab 12 along one edge 13 against which the end 14 of a lock sliding bolt 15 may slide while traveling between a locked and unlocked position. Openings 16 are provided for receiving mounting screws for securing the striker plate to a doorway frame 17. An opening 18 is formed in the striker plate for receiving the sliding bolt 15 when it projects into opening 19 of the doorway frame 17. The opening 18 has a sidewardly bent shield 20 along one edge thereof which is opposite to the edge thereof that is closest to tab 12.

In operative use, as shown in FIGURE 2, if a person 21, on the outer side 22 of the door 23 inserts a flat object 24 into a crevice 25 formed between doorway molding 26 and doorway frame 27 in an attempt to unlock the door by pushing the object 24 across the inclined front wall 28 of the sliding bolt 15, the shield will prevent movement of the object into the intended direction, but will divert its travel as is shown into a non-useful direction, and halt its further insertion.

It will be noted that the door 23 has a small notch 29 to clear the shield when normally opening and closing the door.

In the modified construction, shown in FIGURES 3 and 4, the striker plate 30 includes a fulcrum 31 on which an arm 31a is centrally pivoted by a pin 32. A slot 33 in one end'of the arm receives a pin 34 secured transversely in a pin 35 supported in opening 36 of a block 37 on the striker plate. A compression coil spring 38 around pin 35 normally urges pin 35' away from a leaf spring 39 springingly placed over the end of the opening 36, the leaf spring being secured by rivets 40 to the striker plate. The opposite end of arm 31a has a slot 41 to receive pin 42 secured transversely in a pin 43 fitted into an opening 44 in the striker plate. The door 45 carries a lock having sliding bolt 46 engageable in striker plate opening 47. A notch 48 on the door serves as a relief to clear the leaf spring 39 when the door is in a locked position. In this form of the invention there is no projecting shield upon which a person may hook himself when the door is open, however when it is closed, the leaf spring projects outwardly into the notch 48 so to serve in a like manner as shield 20, above, for diverting an object 24. In this form of the invent-ion, the edge 49 of the door forces pin 43 to pivot the arm, 31a, so to cause pin 35 to push the leaf spring sidewardly, as shown in FIGURE 4.

While various changes may be made in the detail construction, it is understood that such changes will be within the spirit and scope of the present invention.

Having thus set forth and disclosed the nature of this invention, what is claimed is:

1. In a striker plate for a door lock, the combination of a fiat plate having a plurality of spaced apart holes to receive mounting screws, and an opening for receiving a sliding bolt of said lock, said opening having a sidewardly extending lip on one edge thereof to form a shield for said sliding bolt, wherein said sidewardly extending shield comprises a leaf spring secured at one end by rivets to said striker plate, said leaf spring being normally urged sidewardly by the end of a pin extending through a block on said striker plate, the opposite end of said pin being pivotably secured to one end of an arm centrally pivoted on a fulcrum secured to said striker plate, the opposite end of said arm being pivotably secured to a second pin extending through an opening in said striker plate, said second pin being normally pushed by the edge of a closed door to pivot said arm and cause the first said pin to flex said leaf spring sidewardly and shield said bolt.

References Cited UNITED STATES PATENTS E. J. MCCARTHY, Assistant Examiner.

US. Cl. X.R. 292-346