. 2% E946'. L. LANGNER 2,409,35 ` MINE DESTROYER Filed Aug. 26, 1943 à www@ 2,409,635 Patented Oct. 202, >i946; 'nutren sTArss PAENT orties MINE- DESTROYER Lawrence Langner, New York, Nl Y., assignor t0 the Government of the United States of Amer' ica, as represented by the Secretary of War' and ' his successors in office Application August 2.6, 1943, Serial No. 500,061 3 Claims. (Cl. 89-1) (Granted under the act of March 3, 1883, asv amended April4 30, 1928; 370 O. G. 757) 1 The invention described herein may be manu factured and used by or for' the Government' for governmental purposes, without payment to me of any royalty thereon. This invention relates to a mine' destroyer and more particularly it is directed to a device of this character for destroying land mines. One of the objects of the invention is to- pro ing tamping element which may also be» used in carrying out the invention. ' ` Referring more specifically to Fig. 1, theim proved mine destroyer illustrated generally by A is mounted on an armored vehicle B in the form of a tank and comprises an oscillating lever or> walking beam I pivotally connected or fulcrumed intermediate its ends 2 and 3 by a bolt 4 to a pair of brackets 5 which diverge outwardly and down vide a mine destroyer adapted to be mounted on wardly toward the front end of the armored' ve an armored vehicle for destroying' mines buried hicle B from their connection with the beam I in the earth and adapted' to be exploded when and having their lower ends mounted on the tramped on or upon a vehicle passing overI the armored vehicle by bolts 0. same. The walking beam I extends outwardly from Another object of the invention is to provide and above the front end of the armored vehicle l5 a mine destroyer including tamping elements B and is ful'crumed at 4 to the upper ends of the, adapted to be mounted on an armored vehicle brackets 5 a shorter distance from its rear end and actuated by the vehicle for causing the tamp 2 than from the front end 3 thereof, whereby a ing elements to contact the ground for exploding long arm portion l is provided on the front end of mines buried therein. the walking beam I and a short arm portion 8 is Another object of the invention is to provide provided on the rear end of the walking beam a. mine destroyer adapted to be mounted on and actuated by an armored vehicle and which is for a purpose which will hereinafter appear. The rear end 2 of the walking beam I is piv simple in operation, constructed of few parts that can readily be replaced upon being damaged, otally connected by a bolt 9 to the upper end> of a connecting rod I0 having a ring member or strap II mounted on its lower end. The strap which may be quickly mounted on and removed from the armored vehicle and well adapted for the purpose intended without subjecting the I I surrounds an eccentric I2 mounted on one end of a shaft IS rotatably supported on a bracket I4 >driver or crew of the armored vehicle to body secured to the front end of the armored vehicle injury or death upon destroying a mine. B by bolts l5. A sprocket wheel I6 is- mounted on 30 Heretofore in destroying land mines buried in the opposite end of the shaft I3 from the eccen the ground by an enemy a crew of men had to go tric I2 and is driven by a sprocket chain I'I, which over the ground on foot to detect the presence in turn is driven by another sprocket wheel I8 of the mines therein before the mines could be mounted on one end of a shaft I 9 of a part of the destroyed or made ineffective, thereby subjecting mechanism for operating the armored' vehicle B. the men to great danger of body injury or death. 35 A transversely extending supporting bar’ or rod It is therefore the aim and purpose of this 20 is mounted on and extends outwardly an equal invention to provide a -mine destroyer on an distance from the outer end 3 of the oscillating armored vehicle and adapted to be automatically lever or walking beam I and carries a plurality actuated by a mechanism of the armored vehicle 40 of connecting members 2I preferably in the form for exploding land mines in a mine field over of flexible wire strands or cables which hang which troops or other vehicles are to pass, while downwardly from the supporting bar 20 in suit at the same time protecting the driver of the able spaced relation and have mine explosion tamping elements 22 suitably secured to their vehicle from body injury, With the above and other .objects and advan 45 lower or free ends 23, which mine explosion tamp ing elements 22 preferablyV consist of a plurality tages in view the invention consists of certain of sets of chains 24 as illustrated in Fig. l, but features of construction and operation of parts each of the mine explosion tamping elements'22 which will hereinafter be described and shown may comprise an expendable can or bag 25'filled in thel accompanying drawing in which: Fig, l is a perspective view of an armored 50 with any suitable material such as sand or water and having metal soles 26 mounted on its lower vehicle having the improved mine destroyer in end as illustrated in Fig.V 2. » cluding one form of mine exploding tamping ele In the operation of the improved mine de ments mounted thereon; and Fig. 2 is a vertical sectional detail View partly ' in elevation of a modified form of a mine explod stroyer, as the armored vehicle B travels over a 55 field having land mines buried therein, thershaft 2,409,635 3 I9 forming a part of the mechanism for driving the armored vehicle, drives the sprocket wheel I8 which in turn operates the sprocket chain I1 for driving the sprocket wheel I6. The sprocket wheel I6 -being rotated drives shaft I3, which in turn drives the eccentric I2 which ro~ tates in the Strap or ring member I I periodically moving the strap II downwardly and upwardly whereby the connecting rod I Il is periodically 4 vehicle and pivotally mounted adjacent one end thereof to the upper ends of said bracket mem bers, whereby a long arm portion is provided on the front end of the walking beam and a short arm portion is provided on the rear end thereof, means for actuating said walking beam, said means including a sprocket mechanism connected to Ibe actuated by the vehicle motor, an eccentric '- rotated by said sprocket mechanism, a ring moved downwardly and upwardly to cause the 10 member actuated by said eccentric and a rod inner end 2 of the Walking beam I to be peri connected to be actuated by said ring member, odically pulled downwardly and moved upwardly one end of said rod secured to said ring mem which oscillates the walking beam i on its pivot ber and the other end thereof pivotally con 4, thus periodically moving its front end 3 up nected to the rear end of said walking beam, a wardly and downwardly, causing the Vmine ex 16 supporting bar mounted on and extending trans plosion tamping elements 22 to be periodically moved vertically downwardly to beat or strike heavy blows on the earth covering the Yland versely outwardly from the front end of said walking beam and mine explosion elements con nected to said bar, said actuating means being mines to be destroyed, and also to move up constructed and arranged so that upon the ac wardly therefrom, one of which land mines M 20 tuation of the vehicle motor the walking beam is being illustrated in Fig. l. By using the heavy oscillated on its pivotal connection with said chains 24 as mine explosion tamping elements, bracket members for periodically actuating said a greater mined area may be covered and in explosion elements into contact with the ground using» the i‘lexible connecting members ZI the for exploding mines buried therein. mine explosion tamping elements are permitted 25 2. In combination, an armored motor vehicle, to spread over a wider iìeld and to disperse when a pair of bracket members mounted on the front an explosion of a mine takes place and the end of said vehicle and extending outwardly and elements are lifted by the force of the explosion. upwardly from the front end of said vehicle and The sprocket wheel I3 may be of various sizes converging upwardly toward each other, a walk to vary the speed of tamping relative to the 30 ing beam, said walking beam extending out speed of the tank B. Preferably, the speed of wardly from and above the front end of said the vehicle and the tamping action will be such vehicle and pivotally mounted adjacent one end that every foot of ground will be tamped. A thereof to the upper ends of said bracket mem change speed device or" any well known kind bers, whereby a long arm portion is provided on (not shown) may be interposed in the drive be 35 the front end of the walking beam and a short tween the walking beam and axle i8, or inde arm portion is provided on the rear end there ` pendent drive means may be employed for the walking beam. of, means for actuating said walking beam, said > means including a sprocket mechanism connected In providing a longer front end arm portion to be actuated by the vehicle motor, an eccentric 'I on the walking beam I than the short rear 40 rotated by said sprocket mechanism, a ring mem end arm portion 8 thereof, the front end 3 of ber actuated by said eccentric and a rod con the walking beam is caused to move downwardly nected to be actuated by said ring member, one and upwardly a greater vertical distance than end of said rod secured to said ring member the vertical distance traveled by the rear end and the other end thereof pivotally connected to 2 of the walking beam, whereby the mine ex 45 the rear end of said walking beam, a supporting plosion tamping elements 22 may be lowered vwith bar mounted on and extending transversely out a greater impact onto the ground to explodeV the wardly from the front end of said walking beam land mines buried therein. Upon explosion of and sets of explosion tamping chains and cables the mine, the tamping elements 22 are deilected connecting said chains to said bar, said actuat by the force of the explosion but are not broken 50 ing means being constructed and arranged so thereby; and the supporting bar 20 and walking that upon the actuation of the vehicle motor beam are suñîciently far away from the mine to the walking beam is oscillated on its pivotal con avoid damage. nection with said bracket members for peri It will thus be seen that there is herein pro odically actuating said explosion chains into vided a novel and eiiicient form of mine de Contact with the ground for exploding mines stroyer which is well adapted for the purpose indicated above. The mine destroying operation takes place far ahead of the position of the tank itself, making the operation relatively safe. buried therein. » 3. In combination, an armored motor vehicle, a pair of bracket members mounted on the front end of said vehicle and extending outward Even though there has herein been shown and 60 ly and upwardly from the fro-nt end of said ve «, described certain features of construction and hicle and converging upwardly toward each other, a walking beam, said walking beam ex tending outwardly from and above the front end of said vehicle and pivotally mounted adjacent scope of the claims. (i5 one end thereof to the upper ends oi‘ said bracket Having thus described my invention, what I members, whereby a long arm portion is pro claim as new and wish to secure by Letters Patent vided on the front end of the walking beam and operation of parts, it is nevertheless to be under stood that various changes may be made therein if the changes do not depart from the spirit and is: ' „ a short arm portion is provided on the rear end 1. In combination, an armored motor vehicle, thereof, means for actuating said Walking beam, a pair 0f bracket members mounted on the front 70 said means including a sprocket mechanism con end of said vehicle and extending outwardly nected to be actuated by the vehicle motor, lan and upwardly from the front end of said vehicle eccentric rotated by said sprocket‘mechanism, a and converging upwardly toward each other, a ring member actuated by said eccentric and a walking beam, said walking beam extending rod connected to be actuated by said ring mem outwardly from and above the front end of said 75 ber, one end of said rod secured to said ring 2,409,635 member and the other end thereof pivotally con nected to the rear end of said walking beam, a supporting bar mounted on and extending trans versely outwardly from the front end of said Walking beam and expendable weighted con tainers including metal soies connected to said bar, said actuating means being constructed and - 6 arranged so that upon the actuation of the vehicle motor the Walking beam is oscillated on its pivotal connection with said bracket mem bers for periodically actuating said expendable weighted containers into contact With the ground for exploding mines buried therein. LAWRENCE LANGNER.