US1558427A - Burglar alarm - Google Patents

Description

Oct. 20, 1925. I 1,558,427

7 A. K. BODENHORN I BURGLAR ALARM Filed March 18 93 2 Sheets-Sheet l 7' I 2.6 u r 'm ys v Oct. 20, 1925.

A. K. BODEN HORN BURGLAR ALARM Filed March 18, 1924 t 2 sheets sheet 2 Illlllllllfrll rl/IIII A I i .BODE/VHORM erwu Patented Oct. 20, 1925.

I K; BODEZNHORN; 131 "mUmKG-ATE, OAIIIFORNIA.

FBURGLARTALARM.

vApplication filed MarchvlS, .1924. Serial- No. 700,044.-

TOK'CiZZ whom it may concern:

Be it iknown that I, ALBERT K. Bonan- HORN, a citizen of the'United States, residing at. Southgate, in the county o f Los Angelesand State of California, have invented new and useful Improvements in Burglar Alarms, of"-w11ich the following is a specification.

V This Linvention relates to {burglar Pal arms, and it has for one of its-objects the provision oft-a burglar alarm embodying-gun mechanism.

\Vithvthe foregoing objects .in- View, togetherwith such other objects and advan- .tages as maysubsequently appear, this invention resides in the construction and arrangement of parts hereinafter described and claimed and illustrated in the accompanying 'drawings, -in which Figure 1-is a vertical transverse section of the lower part of a window frame and the-.subjacent portion at a wall and showing one form of my burglar alarm, partly'in section, associated withit-he window frame and the wall;

Eig.-2-is.a .view similar 'to 1, showing the window in slightly raised, position andthe resulting effect on the mechanism of the burglar. alarm lFig. 8.is:a View taken onthe lines 8+3 ofFigs. l and 2;

Fig. 4 is a. section taken on vthe line 4-4 of Fig. 1;

(Fig.5 is. a. section taken on-the line 5 -5 liigl 6 isa View showing-the hammer of the, gun

Fig. "7 is a perspective --view ofmeans 'for extracting acartridge from the gun;

Fig. 8 is a fragmentary iew-in elevation ofa doora'n'd its jamb with my burglar "alarm set,.the door :being closed :Fig. 9 is. a. crosssection' taken on theline hr-9 ofFigQS;

Fig. 10 isa View similar to Fig. 8,-but showingthe door slightly-opened andJthe resulting .effect on :part of the mechanism of the alarm at first-toFigs. 1 and2, the numeral20 indicatesi'the lowerportion of a window pane which issetzin the lower sash2l. 'The'nu- 1neral"22indicates the window sill and"23 indicates ta wall under the window sill, 24L being a lflooiz' The lower sash 21 isprovided with a ertical recess 25 positioned medially its inner side'26 and'its outer side 27 and adaptedto ireceive the-upper portion of a"ro'd 28'-having a boss 29. A horizontal recess30 is also formed in theme'mber'fzl of the lowersash and extends fromt'he inner face to meet .the "recess The recess '30 is enlargediat its ""inne1"f p0'rtioI-1, as snownut 31in Figs. 1, 2 :andfi, is adapted to receive a member 32havinge knob "33 extending "beyond the innenface 26. and having a fork '34aa't its inner end.

The fork comprisestwo arcuatev prongs 3a? ancH-St respectively which are resilient and normally engage the portion of the rod 28 atljacentthe boss ""29. The prongs S P and 3%) are provided respectively with outjwardlycurved lips 34 and 34, the distance between which is norma'llyless than the di- 'ameterof the rod 28. .A finishing plate 35 is securedftothe face 26ofthe member 21 and encircles ithe member 32. Therod 28 extenclsthrough 'an 'aperture 37 formed in The 'windowsill 22, througlra portion of the wa1lf23,:and lt-hrough an aperture 39 formed in a tube 40, which is positioned "transverselyin. the wall 23, and extends from theinnerFfaceL23 .of the wall to the "outer face 23 Thetube 40 has its outer portion 40: reduced in diameter 'sothat a shoulder 40" is formed. larger portion 40 of the tube 401s formed with alongitudinal recess 42 in its "lower jportioinitlie recess being clearly shown in "Fig. 4.

The. recess l-2 'slid'ablyreceives the elongated portion 4=3 iof a cartridge extractor '44 (shown in Fig. 7) which comprisesa The inner and i flat ring i5gpositioned at anend ofthe'portion 43 and at right angles thereto. The portion -13 of the cartridge extractor ttextends beyond the inner face 23 of thewall 23, and the ring 21-5 ofi'the "extractor abuts againstthe.shon1lcle1v40 of the tube 450. A cartridge 46, "\irhich may be either blank or "loaded, is :placed within "the tube 40, "the t flange "46 ofthe' cartridge abutting. against the ring 45 of the extractor'tt. A hammer 47 'is'positioned partly within the section 40" 'otthe' tube '40'and extends beyond the inner face 23 of the wall 23. The hammer 47 Comprises a knob 48 and a peripheral flange 49, the latter being positioned near the inner end of the hammer. A. coil con1- pression spring 50 encircles the hammer 47 and is held between the flange 49 and a plate 51 which is removably affixed to the inner face 23 of the wall 23 and through which the hammer 4" extends. The plate 51 is provided with a slot 52, through which the portion 43 of the shell extractor 44 extends, the slot 52 being arcuate and of greater length than the width of the member 43. The plate 51, as shown in Fig. 3, is provided with opposing lugs 53 and 54 having formed therein respectively slots 55 and 56, these slots being formed in opposite sides of the lugs. The slots 55 and 56 engage respectively screws 57 and 58 which are secured to the wall 23.

It will be understood that by forming the plate 51, as described, the same may be readily removed from the wall by turning it through a small arc, so that the tube 40 may be opened for the purpose of removing a cartridge and inserting another cartridge therein. When the burglar alarm is set, the fork 34 engages the rod 28 immeiately under the boss 29, which is wider than the distance between the prongs 34 and 84 of the fork, and the hammer 47 is drawn back, compressing the spring 50, the lower end of the rod 28 abutting against a face of the flange 49 to retain the hammerin retractct position and the spring compressed.

It will thus be seen that when an attempt is made to enter a building by raising the window, as shown in Fig. 2, the fork 34, which rises with the opening of the window, lifts the rod 28 out of the tube 40, so that the hammer 47 is caused by the action of the spring 50 to strike the cartridge 46, which is thereby fired, and, it blank, merely gives an alarm. After a cartridge has been used, it may be extracted after removing the plate 51 and the hammer 47 with the spring 50, by pulling the cartridge extractor 44.

At such times when it is not desired to have the burglar alarm set, the fork 34 may be made to disengage the rod 28 by pulling the knob 38 of the member so that the fork 34 is pulled into the portion 31 of the recess 30. It will be understood that the window may then be raised without firing the cartridge, as the rod 28 will be retained in the tube 40.

Referring now to Figs. 8 to 13 inclusive, the numeral 65 indicates a door and the numeral (36 indicates the jamb for the door. In this modification, the tube 40, the shell ex-' tractor 44, the cartridge 46, the hammer 47, the spring 50 and the plate 51 are constructed and positioned as previously described, except that the tube 40 does not contain the aperture 39 as described for the first mod'r fication, and the hammer 47 is provided, in this modification, with a recess 68, the parts enumerated being fitted, in this instance, through the doorj am and the adjacent wall.

lVhen the alarm of this modification is set,

a member 69, pivoted on a screw 70, engages the recess 68 and contacts with the angular face 71 of an extension 72 projecting outwardly from a member 73 secured to the door (35 near the edge of the latter. hen an attempt is made to open the door 65, it will be seen that the member 69 will slide upwardly on the face 71 of the extension 72 in the direction shown by the arrow 7 5 in Fig. 8, whereby the member 69 will be disengaged from the recess 68 in the hammer 47. This action causes the hammer to be released and to be projected against the can fridge 46, firing the same.

lVhile I have herein described two forms of my invention, modifications thereof may be devised without departing from the spirit thereof, and it is to be understood that such modifications come within the scope of this invention.

lVhat is claimed is:

1. A burglar alarm adapted to be as sociated with a wall and with a closure for an opening, said alarm comprising a tube extending through the wall, a cartridge retainable within said tube, a hammer within said tube, said hammer being adapted to strike said cartridge to fire the same, a coiled spring encircling said hammer, means associated with the closure for keeping said hammer in retracted position and said spring compressed when the closure is closed, said means being adapted to be actuated by the opening of the closure to release said hammer for impact against said cartridge, said hammer being urged against said cartridge by the expansion of said spring, and means for extracting said cartridge, and means comprising a slotted face plate for permitting said hammer and said cartridge to be withdrawn from said tube.

2. A burglar alarm adapted to be associated with a wall and with a closure for an opening, said alarm comprising a tube extending through the wall, a cartridge retainable within said tube, a hammer within said tube, said hammer being adapted to strike said cartridge to fire the same, a coiled spring encircling said hammer, means associated with the'closure for keeping said ham- .nier in retracted position and said spring compressed when the closure is closed, said means being adapted to be actuated by the opening of the closure to release said hammer for impact against said cartridge, said hammer being urged against said cartridge by the expansion of said spring, means for extracting said cartridge, and means positioned on the inner face of the wall for normally closing one end of said tube, said closmg means being adapted to be readily detached to allow the removal of said cartridge and said hammer.

3. A. burglar alarm adapted-to be associated with a wall and with a closure for an opening, said alarm comprising a tube extending through the wall, a cartridge retainable within said tube, a hammer within said tube, said hammer being adapted to strike said cartridge to fire the same, a coiled spring encircling said hammer, means associated with the closure for keeping said hammer in retracted position and said spring compressed whenthe closure is closed, said means being adapted to be actuated by the opening of the closure to release said hammer for impact against said cartridge, said hammer being urged against said cartridge by the expansion of said spring, means for extracting said cartridge, and means positioned on the inner face of the wall for normally closing one end of said tube, said closing means being adapted to be readily detached to allow the removal of said cartridge, and comprising a plate and means for fastening the plate, said fastening means engaging slots in the plate, the slots being arranged to be disengaged from said fastening means by a turning of said plate.

4. A burglar alarm adapted to be associated with a wall and a closure for an opening, said alarm comprising a tube extending through the wall, a cartridge re tainable within said tube, a hammer within said tube, said hammer being adapted to strike said cartridge to fire the same, actuating means associated with the closure and with said hammer for keeping said hammer in retracted position when the closure is closed, said actuating means extending into the body of the closure being adapted to be actuated by the opening of the closure to release said hammer for impact against said cartridge, and means for releasing said actuated means.

5. A burglar alarm adapted to be a sociated with a Wall and a closure for an opening, said alarm comprising a tube extending through the wall, a cartridge retainable Within said tube, a hammer within said tube, said hammer being adapted to strike said cartridge to fire the same, means associated with the closure and with said hammer for keeping said hammer in retracted position when the closure is closed, said means being adapted to be actuated by the opening of the closure to release said hammer for impact against said cartridge, means for extracting said cartridge, and means positioned on the inner face ofthe wall for normally closing one end of said tube, said closing means being adapted to be readily detached to allow the removal of said cartridge.

6. A burglar alarm adapted to be associated with a wall and a closure for an opening, said alarm comprising a tube extending through the wall, a cartridge retainable within said tube, a hammer within said tube, said hammer being adapted to strike said cartridge to fire the same, means associated with the closure and with said hammer for keeping said hammer in re tracted position when the closure is closed, said means being adapted to be actuated by the opening of the closure to release said hammer for impact against said cartridge, means for extracting said cartridge, and comprising a plate and means for fastening the plate, said fastening means engaging slots in the plate, the slots being arranged to be disengaged from said fastening means by a turning of said plate.

7. A burglar alarm comprising a tube having an enlarged end and a reduced end, said reduced end being adapted to retain a cartridge therein adjacent the enlarged end, a cover plate for the enlarged end, a hammer slidable through said cover plate into said enlarged end, a spring disposed within said enlarged end about said hammer, so as to urge said hammer to strike said cartridge, means for holding said hammer in retracted position, said means being associated with a closure, whereby opening movement of the closure will cause said means to release said hammer so as to strike the cartridge, said cover plate being removably positioned over the enlarged end, and a cartridge extractor extending through said cover plate and into said enlarged end.

In testimony whereof I have signed my name to this specification.

ALBERT K, BODENHORN.

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