US1792478A - Automobile theft alarm - Google Patents

Description

-Feb. 17, 1931. J. BARBECK AUTOMOBILE THEFT ALARM Filed July 20. 1929 Patented Feb. 17, 1931 UNITED STATES PAT JOSEPH BARBECIK, OF CLEVELAND, OHIO AUTOMOBILE TI-IEFT ALARM Application filed July 20,`

My invention pertains to an automobile theft alarm and more particularly to an appliance mainly hidden from ordinary observation and adapted to sound the alarm during any unauthorized driving of the vehicle.

One object of my invention is to provide an appliance which is applicable to any make of car, which is readily attached as an accessory without interference with any other standard operating part of the vehicle, which is ade structions. The showing of the drawing andv the particular description are merely specific eXemplifications of a'plurality of mechani-V cal embodiments and arrangements.

Adverting to the drawing: Figure 1 is a side elevation of an automobile,

a middle portion being shown as a fragmen-V tary section to disclose one exemplifying location of an appliance embodying the principles of my invention.

Figure 2 is an enlarged vertical section onV ingu ,A'lower complementary division 22 of line 2 2 of Figure 1.

Figure 3 is a plan section on line 3-3 of;

Figure 2 showing in full and dotted lines the functionating and inutile positions respec-` tively of one cooperating displaceable element.

An automobile 1 includes in its driving mechanism the conventional propeller shaft 2 located below the floor 3 of the vehicle. The

forward foot board of the floor 3 is providedjust ahead of the front seat with an opening 4 in which is mounted a hollow casing 5 of any standard lock mechanism. An annular flange 6, carried by the casing 5, is secured to the top of the flooring by means of screws 7.

Fitted in the casing 5 is a plunger 8 adapted;

to be turned by use of the proper key 9. It

should be understood that a combination lockY may be substituted for the key control if desired.

mounted a double arm rock lever. Its one 1929. serial No. 379,687.

arm 11, when `in its functionating position, as shown in Figure 2 and in Afull lines in Figure 3, projects toward the propeller shaft 2. Its other arm 12, `as shown in Figure 2, projects in an opposite direction and has attached to it in any appropriate manner a resilient extension 13 which carries -onits eX- tremity a weight or hammer 14. A spring 15 connects'the'arm 11 with an ear formed on the near side of the plunger-8 and serves to exert an upward Apull/for a purpose to be hereinafter explained.

' Attached in a depending vposition to the underside of the flooring 3, by means of bolts 16,is a bracket 17 the'lower endof which suitably carries a bell 18 in a position to" be vstruck by the hammer 14 though' normally f out of contact therewith.

It-i's preferable, not only as a protection against interference with myalarm mechamsm, but also to protect it against dust, to

provide a housing for theoperating. mech-v anism of my invention. Ihave disclosed a composite housing of quadrilateral form including an upward division 19 outwardly flanged around its top at 20 and confining a gasket 21 against the lower side of the floorthe housing likewlse has its upper end outwardly flanged at 23 and such flange is opl posed to another flange 24 around the lower end of the upper. division 19. yBetween the flanges 23 and 24 is interposed a sealingV gasket25. The two divisions 19 and22 of the housing are secured to each other'and firmly suspended from the flooring byy a series of four bolts 26 having their heads 27 abutting thelower side of the flange 23 and provided in appropriate coun-tersinks formed in the upper surface ofthe floor with nuts 28. A shaft 2 is enveloped by twocoacting members 29 and 30 eachzprovided withdiametricallyl opposite flanges through which are passedV bolts 31 adapted to effect a clamping actionof the members 29 and 30 upon the shaft so that they will rotate therewith in the direction indicated by the arrow in Figure 2.

One of the flanges, asv illustrated one ofthe two. formed on themember 30, is lengthened somewhat et s2 t@ @Verhees the flange the member 29 which is opposed to it. The member 30 is clamped to the shaft 2 within the composite housing and in such a position that its extension 32 is adapted during its orbital movement to impinge against the free end of the arm 11 and so as intermittently (one for each rotation of the shaft 2) to depress the arm 11 against the action of the spring 15 when the parts are in the position shown in Figure 2 and in full line in Figure 3. Presently, the extension 32 will slip past the extremity of the arm 11 to release it whereupon the spring 15 suddenly pulls it up against a stop 33 and such action causes the hammer 14 to tap. the bell 18. As will be readily understood, the bell 18 will be sounded with each revolutionof the shaft. A covering plate 34 may be attached to the floor to hinder unauthorized access to the screws 7 and nuts 28.

When the owner of the automobile is himself to drive the ca r he will insert his key 9 and turn the plunger 8 through an angle of 90 to the position in which it appears in dotted lines in Figure 3, thereby simultaneously displacing the free extremity of the arm 11 beyond the path of orbital movement of the extension 32 and likewise removing the hammer 14 from proximity to the bell 18.

1. In an automobile theft alarm, the combination of a propeller shaft, a projection carried by said shaft, a bell, a resilient hammer pivotally arranged to strike said bell and to be actuated by said projection and lock mechanism for turning the pivot of said hammer to shift it beyond the orbital path of movement of said projection.

2. In an automobile theft alarm, the combination of a propeller shaft, a projection carried by said shaft, a bell, a lock-controlled turnable member having a transverse extension, a rock lever pivotally mounted on said extension, said lever being adapted to strike said bell and to be actuated by said projection.

3. In an appliance of the character described, the combination of a rotary driving member, a box enclosing a section of said member, a bell in said box, and a double armed lever pivotally mounted in said box, a composite clamp on said shafthincluding a projection adapted to impinge against one arm of said lever to shove it through a predetermined arc at every rotation of said shaft, the other arm being adapted to strike said bell.

1. In an appliance of the character described, the combination of a vehicle fixture, a box attached to said fixture and enclosing a section of said shaft, a lock-controlled member turnably mounted in said fixture and projecting into said box, a bell in said box, a lever movably mounted on said member, said shaft carrying a projection adapt- Signed by me, this 9th day of July, 1929. 'i

JOSEPH BARBECK.

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