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Publication numberUS2620387 A
Publication typeGrant
Publication dateDec 2, 1952
Filing dateNov 2, 1950
Priority dateNov 2, 1950
Publication numberUS 2620387 A, US 2620387A, US-A-2620387, US2620387 A, US2620387A
InventorsEberhardt Arthur
Original AssigneeEberhardt Arthur
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Automobile theft preventing ignition attachment
US 2620387 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Dec, 2, 1952 A. EBERHARDT 2,620,387


The present invention relates to improvements in devices for the prevention of theft of automobiles, motorcycles, trucks, aer-oplanes and other automotive vehicles as well as motor boats and, more specically, to a new and improved automobile theft preventing ignition attachment.

One object of the present invention is the provision of a device of the character described which hermetically encloses into a steel casing the ignition coil and which provides for a sturdy steel tube enclosing the conduit that runs from the ignition coil to a special safety lock, which-in addition-to the usual ignition lock is mounted on the dashboard or on any other suitable part of the vehicle where it can be reached conveniently by the operator.

Another object of the present invention is the provision of a device of the character described which perrnits the operator of a parked vehicle to lock the electrical system of the vehicle by a second locke-in addition to the usual ignition lock switch-in such a manner that the electrical connection between the usual ignition lock 'switch and the ignition coil is interrupted and simultaneously an electrical connection between an electrically actuated signal, such as a horn or a buzzer, and the usual ignition lock switch is closed, so that a thief, who by means of a skeleton key has closed the usual ignition lock switch, still has not yeu closed the ignition circuit but only the alarm circuit, with the result that the horn or buzzer will sound an alarm for aiding in the speedy discovery of the attempted theft. Said second lock preferably being installed at a place where it is not expected to be, for instance beneath a removable ornamentation on the dashboard, or within the glove compartment, or the like.

A further object of the present invention is the provision of a device of the character described which is simple in construction, which consists only of a few inexpensive parts that can be assembled easily, and which can be installed into any vehicle within a comparatively short period of time, but which is also durable, sturdy, and well adapted to withstand the rough usage to which devices of this type ordinarily are subjected.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claims, it being understood that changes may he made in the vconstruction and arrangement of parts without departing from the spirit of the invention as claimed.

In the accompanying drawing a preferred form of the invention has been shown.

In said drawing:

Figure 1 is a wiring diagram showing the switches in positions in which the ignition circuit is interrupted, and the alarm circuit ready to be closed by switching on the usual ignition lock switch;

Figure 2 is a partial wiring diagram showing the switches in positions in which the ignition circuit is closed, and the alarm circuit interrupted irrespective of the position of the usual ignition lock switch.

Figure 3 is a detailed sectional view of the aforementioned second lock switch on the line 3 3 oi 4;

Figure l is a fragmentary sectional view on the line 5;--4 of Figure 3; and

Figure 5 is a fragmentary side elevation and vertical sectional view of the ignition coil and conduit encasing.

Similar reference characters refer to similar parts throughout the several views.

In the drawing the numeral 2 denotes an ignition coil having terminals fi and 6 and being grounded at ii (Figure l) in usual manner, In Figures l and 2 the numeral Ii denotes an electrically actuated signal such as a buzzer, or a horn or the like from which extend preferably flexible terminal wires i2 and i4; the numeral i5 denotes a push bottom switch for closing the alarm circuit; the numeral it denotes a battery or any other suitable source oi current, which is grounded at Eil; and the numeral 22 denotes the usual ignition switch having terminals 2li and 25 and being provided ordinarily with a key-operated locking mechanism (not shown). rPhe aforementioned parts, in the manner indicated in the drawing or any other suitable, well-known manner, belong to the standard equipment of automotive vehicles and form no part of my present invention, except the signal device which may be a separate and specific part of my new and improved theft preventing attachment although the horn as ordinarily installed in a vehicle may be used in connection with my attachment, is ii cated in Figures l and 2.

ine main parts of my ner.1 and improved automobile theft preventing ignition attachment are a tamper-proof housing 2S for the coil 2, a likewise tamper-proof tubular member 30, and a preferably lockable change over switch 32 from which themember 39 extends to the housing 28.

A conduit for connecting the terminal 4 of the coil 2 to the switch 32 is extended through the member 30, and the switch 32 is adapted for connecting in its nrst position the terminal to the terminal 2:3V of the ignition switch 22, and in its second position for connecting the terminal |13 of the signal l!) to the terminal 2li with the ignition circuit interrupted. While the constru-ction of the switch 32 and the housing 28 as well as the manner of connecting either the terminal 4 or the terminal lli to the terminal 24 can be carried out in various suitable Ways, I have sho-wn in the drawing the following preferred arrangement: The housing 28 can be made as a cylindrical member of steel or the like having an open end and a closed end portion which is provided with a perforation Sli, and having in its wall portions the perforations 36 and 38. Through the perforation 36 extends the terminal of the coil 2; through the perforation 35 extends a bracket (not shown) for holding the coil 2; and the perforation 38 is adjacent a contact member lli), which is secured to the terminal li. A sleeve t2 is secured, preferably by welding, to that portion of the housing 28 which surrounds the perforation 38, and a tube M is screwed into the sleeve 42 or is otherwise firmly secured thereto. A pipe connection member it preferably is screwed into the member 2li and has secured to its upper portion, by welding or the like one end of the tubular member si), which may be somewhat iexible for facilitating the installation of the device into a vehicle. A bushing l is secured within the member 6, and a bent conductive rod 53 is slidable in the bushing 8. The rod has at its ends contact members 52 and 55., and is extended through the member 32, whose other end is secured to the casing 56 of the change over switch 32. A spring B preferably is interposed between the parts G8 and 52 for forcing the latter into the funnel-shaped opening of the contact member Within the casing 5d there is secured to the rod 5i), at Si?, one end of a flexible conduit 62, whose other end is connected at Gl to a wire B5, which is connected to the terminal 2d. A lever member 68 of insulating material is secured to the rod 5B by means of a pin 'iii or the like, and is so located that it can be engaged by a cam 'F2 which may be operated by a key or the like, that can be inserted into the casing 5B through a key hole lli (Figure 4) The connection Sil preferably is separated from the bottom 76 of the casing 55 by means of a piece 'i8 of insulating material, and a terminal 80 is secured to the piece 'I8 and is connected at 32 to a wire 8 that is connected to a terminal of the alarm signal It.

If the vehicle is parked, the various parts of the device are in the position shown in full lines in Figures l, 3, 4 and 5, and the ignition switch 22 is ofi'. Thus there are the following two electric circuits: First, from the grounded (negative) terminal of the battery IS to the wire I2, the horn I0, the wire |13, to the open horn push bottom switch I6, and back to the positive terminal of the battery I8. Second, from the positive terminal of the battery it to the terminal 25 of the open switch 22, then from the terminal 22 through the wire t9 to the terminal Sii, then through the flexible conduit 62 and the conductive rod 5) to the contact member 52, which is in spaced relation to the contact member 4t, The latter being connected to the terminal 4 of the. ignition coil 2, which is grounded at 8 and 'whose terminal B is connected to the distributor (not shown) in the usual, well-known manner. Should a thief manage to close the ignition switch 22, as is indicated in dash-and-dotted lines in Figure l, the contacts t and 52 are still in spaced relation to each other, so that the ignition circuit is interrupted, but the alarm circuit is closed because the contact 54 touches the contact 8G, so that now the following electric circuit is closed: From the positive terminal of the battery i8 to the terminal 2t of the switch 22, to the terminal 2:3, through the wire 66 to the terminal 64, through the flexible conduit 62, the closed contacts 5@ and 8B, the wires S and l to the horn i9, and through the wire i2 to the ground (2E) to which the negative terminal of the battery I8 is connected.

In order to operate the vehicle, the cam 'l2 is turned about ninety degrees relative to its position of Figures l, 3, and 4 to the position shown in Figure 2, so that the spring E8 forces the contact 52 into the contact member il and moves the rod 5i! into a position in which the contact 56 is in spaced relation to the contact 32. In this last mentioned position the alarm circuit is interrupted, and the ignition circuit is closed after closing the switch 22, so that now an electric current Will flow from the positive terminal of the battery i3 through the closed switch 22, the wire 66, the conduit B2 and the rod 5l! to the terminal G of the ignition coil 2, and then through the latter and through the wire 6 to the distributor as well as through the ground (8) back to the grounded negative terminal of the battery I8.

Since certain changes may be made in the above article and different embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein des-cribed, and all statements of the scope of the invention which as a matter of language might be said to fall therebetween.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent in the United States is:

1. In an automotive vehicle which is provided with an ignition switch, an ignition coil, a distributor and a storage battery, an electrically actuated alarm signal, and, a conductive rod connecting one terminal of the ignition switch to said coil, a theft preventing attachment comprising lockable means for temporarily interrupting said conduit and connecting the aforementioned terminal of the ignition switch to said alarm signal so as to close the alarm circuit as soon as said ignition switch is switched on while the ignition circuit is interrupted, burglarproof enclosure means encompassing said coil, and a longitudinal tubular burglar-proof member through which said conductive rod is movably extended and whose ends are secured to said coil enclosure means and to said lockable means respectively.

2. In an automotive vehicle which is provided with an ignition switch, an ignition coil, a distributor, a storage battery, an electrically actuated alarm signal, and, a conduit connecting one terminal of the ignition switch to said coil, a theft preventing attachment comprising a tamper-proof housing encompassing said coil and having a first opening for extending therethrough 5 a conductor leading to the distributor and a second opening adjacent a coil terminal which is to be connected to the ignition switch, a tubular member having on-e of its ends secured to that portion of said housing which surrounds said second opening, a first contact member being connected to said coil terminal which is adjacent said second opening, a longitudinal conductive rod slidably extended through said tubular member being in spaced relation to the inner side of said tubular member, a second contact member being electrically connected to one terminal of said alarm signal, lockable means for moving said conductive rod into a first position in which one of its ends touches said first contact member While its other end is in spaced relation to said second contact member, and into a second position in which one end of said conductive rod touches said second contact member REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,116,228 Bolger Nov. 3, 1914 1,257,259 Leslie Feb. 19, 1918 1,336,306 Lohse Apr. 6, 1920 1,396,667 Simms Nov. 8, 1921 2,295,178 Kolias Sept. 8, 1942

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1116228 *Apr 24, 1914Nov 3, 1914William BolgerSafety electric-circuit system.
US1257259 *Jan 8, 1917Feb 19, 1918E O SargentSafety alarm device for motor-vehicles.
US1336306 *Jul 9, 1917Apr 6, 1920Otto C LohseAutomobile protective device
US1396667 *Dec 30, 1918Nov 8, 1921Irwin B SimmsCombination lock and switch
US2295178 *Jul 14, 1941Sep 8, 1942Christ E KoliasAutomobile theft indicator
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3603750 *Oct 2, 1969Sep 7, 1971Walo BeierAntitheft device for motor vehicles
US3675035 *Jan 25, 1971Jul 4, 1972Joseph BrastyTheft-proof automobile ignition system
US3697945 *Jan 20, 1971Oct 10, 1972James D ComberLock switch and security system for motor vehicle electrical circuits
US4209709 *Sep 5, 1978Jun 24, 1980BBJ LaboratoriesAnti-theft ignition system
U.S. Classification307/10.3
International ClassificationB60R25/04
Cooperative ClassificationB60R25/04
European ClassificationB60R25/04