US1974490A - Electromagnetic spark ignition - Google Patents

Description

Sept. 25, 1934. K. scHAFl-'LER-GLSSL 1,974,490

' ELECTROMAGNETIC SPARK IGNITION APPARATUS Filed Feb. 2l, 1955 F/G. i.

'Patented sept.25,1934 1 I 1,974,490

I ELECTRMAGNETIC SPARK IGNITION APPARATUS Konrad SchafHer-Glssl, Vienna, Austria Application February 21, 1933, Serial No. 657,779 In Austria April 16, 1932 3 Claims. (Cl. 1'75-115) This invention relates to an electro-magnetic ends of the electrodes are bent ofi so as to face spark ignition apparatus, particularly for use each other and are normally separated by a with crude oil, and of the kind comprising a pair spark gap 3. On the magnet coil 1 being eneroi spark electrodes one of which is movable and gized, an axial movement will be imparted to the `i controlled by an electro-magnet for intermittent rod 5 through the medium of the armature, and 60 contact with the companion electrode. by the action of the head on the bracket 8, the

In known devices of this kind the movable elecelectrode 9 will be rocked so as to strike against trode is controlled by springs the action of which the electrode l0. As the rod moves it engages has to be overcome by the magnet, and the imthe contact spring 13 and separates it from the i() pact with which the electrodes meet is therefore stud 2 so that the magnet circuit will be broken. 05 insuniciently strong to maintain the contact The rod then drops and allows the electrodes to points free from carbon deposits when the appaseparate, thereby producing a spark or, if the curratus is employed for the ignition of crude oil rent be strong enough, an arc in the gap 3. As vapours. the rod drops, the magnet circuit will again be i5 The object of the present invention is to obclosed and the operation repeated, the device act- ,70

' tain an arrangement capable of maintaining the ing as an automatic interrupter.

contact points perfectly free from carbon dein the illustrated arrangement the arm of the posits, and the invention consists broadly in emelectrode 9 is made comparatively thin and resilploying a pair of rod-shaped electrodes one of ient and it will therefore spring back by elastic which is pivoted and adapted to strike against reaction under the impact made on the electrode 75 the companion electrode under the iniiuence of 1U. This happens just after the magnet circuit a magnet the action of which is strengthened by has been broken, and the separation of the electhe provision of an armature carrying part of `trodes will therefore be very rapid, and a powerthe magnet core, the electrodes being resilient ful spark will be produced. A separate spring 53g and adapted to separate by elastic reaction on for the separation of the electrodes will be obvi- 80 making impact with each other. ated by the arrangement. Naturally both elec- The magnet may act on the movable electrode trodes can be made sprngy instead of only one. through the medium of a rod which passes aX- A further advantage obtained by the arrangeially through the magnet and carries the armament is that the armature forms part of the core 3e ture, the electrode being pivoted and iitted with and that it will move in a straight line in the axial a bracket engaged by a head on the rod. direction of the magnet. It will therefore work Fig. 1 of the accompanying drawing represents in a very strong magnetic ield with an air space a vertical section of an apparatus according to of minimum dimensions between it and the pole the invention, and pieces. and a very strong magnetic action will be -35 Fg- 2 iS a CTOSS-SECOD On the line II-II 0f obtained by a comparatively small magnet. The 90 Fig. 1. strong magnetic action will keep the contact The apparatus COIYIDTSGS 9 Casing CODaning a surfaces of the electrodes free from carbon demagnet coil l, a relatively short magnet core 4, @site and an armature 6 which forms a complementary I Claim;

part of the core. The armature is connected to 1 An e1eetre magiieiie Spark ignition appaa rod 5 which passes axially through the magnet fetus of the Character described, Comprising e,

core and which is movable in axial direction, the support, e pair ef germany seperated red sheped I'Od being guided in a metau Sleeve '7 and in spark electrodes connected, one rigidly and the an insulating SIBBVG 12- A COl Spring 11 iS DI'O- other pivotally, to said support, an electro-mag- Vded 0n WhCh the armature and I'Od are nO- net in said support, a relatively short core in said 100 mally SUDDOIS in DOSDOn t0 be InOVed by the' magnet, an armature forming a complementary magnet. The circuit of the magnet coil contains pari; of Said Cei-e, Connection between Seid armeda COIlaC Spring 13 WhCh traverses the OD end ture and the pivoted electrode adapted to cause of the rod 5 and which normally makes contact the latter to strike against the rigid electrode on .5e with a stud 2 for closing the circuit. The ignithe magnet being energized, the electrodes being 105 tion circuit comprises two rod-shaped electrodes resilient and adapted to separate by elastic reac- 9 and 10 the latter of which is rigidly secured to tion on making impact with each other. the casing. The electrode 9 is connected to a 2. A structure as claimed in claim 1 wherein fork bracket 8 which is pivoted at 14 and which the connection between the armature and the 55 engages loosely a head on the rod 5. The free pivoted electrode comprises a headed rod ar- 110 armature so as to be moved axially thereby on the magnet being energized, a bracket on the pivoted electrode, a head on said rod engaging loosely with said bracket and operative to turn the pivoted electrode into contact with the rigid electrode when the rod is moved by the magnet, and avcontact spring arranged in the circuit of the electro-magnet and in thepath of said rod so as to be acted upon by the latter for breaking the circuit when the rod is operated, the electrodes being resilient and adapted to be separated by elastic reaction on making impact with each other.

KONRAD sCHAFFLER-GLSSL.

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