Military Searchlight Truck (1937)

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  • 8/22/2019 Military Searchlight Truck (1937)

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    2 , 1 9 4 , 8 3 5arch 2 6 , 1 9 4 0 . J . c . SAVAGEsmacnmenw

    Filed March 2 4 , 1 9 3 7 5 Sheets-Sheet 1

    F i g . 1 . 5|__________.~____________

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    2 , 1 9 4 , 8 3 6a r c h 2 6 , 1 9 4 0 . J . c . SAVAGEsmncamem

    Filed M a r c h 2 4 , 1937 5S h e e t s - S h e e t 2

  • 8/22/2019 Military Searchlight Truck (1937)

    3/8

    2 , 1 9 4 , 8 3 6a r c h 2 6 , 1 9 4 0 . J . c . SAVAGESEARCHLIGHT

    F i l e d M a r c h 2 4 , 1937 5 Sheets-Sheet 5

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    March 2 6 , 1 9 4 0 . J , c . SAVAGE 2 , 1 9 4 , 8 3 6SEARCHLIGHT

    Filed larch 2 4 . 1937 5 Sheets-Sheet 4

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    M a r c h 2 6 , 1 9 4 0 . J _ c _ S A V A G E _ 2 , 1 9 4 , 8 3 6 vS E A R C H L I G H TFiled M a r c h 2 4 , 1937 5 Sheets-Sheet 5

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    P a t e n t e d M a r . 2 6 , 1 9 4 0

    UNITED STATES PATENT OFFICE

    2 , 1 9 4 , 8 3 6

    2 , 1 9 4 , 8 3 6SEAROHLIGHT _

    John C l i f f o r d S a v a g e , Hendon, London, EnglandA p p l i c a t i o n M a r c h 2 4 , 1 9 3 7 , S e r i a l N o . 1 3 2 , 8 3 7

    In G r e a t Britain March 6 , 1 9 3 64 Claims.

    Th e p r e s e n t i n v e n t i o n r e l a t e s t o s e a r c h l i g h t sand has f o r i t s c h i e f o b j e c t t o provide a n im pr ovedsearchlight so constructed as to enable a largea r e a t o be r a p i d l y a nd thoroughly scanned by t h e

    5 l i g h t b e a m without a p p r e c i a b l e r e d u c t i o n i n t h ei n t e n s i t y o f th e l i g h t per u n i t a r e a .

    Another o b j e c t o f th e p r e s e n t i n v e n t i o n i s t o prov i d e a s e a r c h l i g h t th e l i g h t beam from w hichis cap a b l e o f b e i n g s p r e a d o r d i v e r g e d l i n e a r l y inaplane

    1 0 a t r i g h t a n g l e s t o t h e o p t i c a l a x i s o f t h e p r o j e c t o rand a l s o o f b e i n g t r a v e r s e d c o n t i n u o u s l y , p r e f e r -a b l y t o v a r i a b l e e x t e n t s , i n a d i r e c t i o n p a r a l l e l t ot h e o p t i c a l a x i s o f t h e p r o j e c t o r .A t i l l f u r t h e r o b j e c t o f t h e p r e s e n t i n v e n t i o n

    1 5 i s t o p r o v i d e a s e a r c h l i g h t whose l i g h t b e a m i sc a p a b l e o f b e i n g c o n t i n u o u s l y t r a v e r se d and a u t om a t i c a l l y spread o r d i v e r g e d l i n e a r l y t o an e x t e n tdepending on th e extent o f th e t r a v e r s i n g mo v ement.

    2 0 Further o b j e c t s a nd advantages o f th e p r e s e n tinvention w i l l b ecome apparent from the a c c o mpanying d e t a i l e d d e s c r i p t i o n o f a preferred embodiment thereof with reference t o the a c c o mpanying drawings i n w h i c h :

    25 F i g . 1 i s a view i l l u s t r a t i v e o f the pur pose o f thep r e s e n t i n v e n t i o n ;F i g . 2 i s a v i e w i n s i d e e l e v a t i o n o f a m otor roadv e h i c l e equipped with a s e a r c h l i g h t a c c o r d i n g t o

    t h e p r e s en t i n v e n t i o n ;30 F i g . 3 i s a n e nd e l e v a t i o n of the m otor roadv e h i c l e shown i n F i g . 2 ;

    F i g . 4 i s a plan view o f the mirror mosaic o rassembly employed i n a s e a r c h l i g h t a c c o r d i n g t ot h e p r e s e n t i n v e n t i o n ;3 5 F i g . 5 i s a view i n s i d e e l e v a t i o n o f themirror mosaic o r assembly;

    F i g . 6 i s a c r o s s s e c t i o n a l v i e w o n the l i n e A--Bo f F i g . 5 ;F i g . 7 i s a v i e w i n s i d e e l e v a t i o n o f m e a n s f o r4 0 t r a v e r s i n g the mirror mosaic o r a s s e m b l y .S e a r c h l i g h t s a s u s u a l l y c o n s t r u c t e d p r o j e c t ,

    g e n e r a l l y s p e a k i n g , a p a r a l l e l o r s u b st a n t i a l l y p ara l l e l beam o f l i g h t , the c r o s s s e c t i o n a l area o fw h ic h a t any d i s t a n c e from th e p r o j e c t o r i s ap

    4 5 proximately c i r c u l a r a nd o f m o r e o r l e s s l i m i t e dd i m e n s i o n s : c o n s e q u e n t l y m u c h t i m e i s r e q u i r e dt o scan a g i v e n area w ith the beam a n d therei s c o n s i d e r a b l e l i k e l i h o o d o f th e o b j e c t w h i c h i ti s d e s i r e d t o ?nd a nd i l l u m i n a t e remaining unilluminated e v en i f i t maintains a p e r f e c t l ys t r a i g h t a nd l e v e l c o u r s e , a nd where, a s i n th ec a s e o f a i r c r a f t , th e o b j e c t i s c a p a b l e no t o n l y o fc o n s i d e r a b l e s p e e d b u t a l s o o f b e i n g manoeuvred

    5 5 i n t h r e e dimensions t o a v o i d t h e beam, t h e chances

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    ( 0 1 . 2 4 0 4 5 1 4 )o f ?nding and i l l u m i n a t i n g i t by m e a n s o f , as e a r c h l i g h t a l o n e a r e c o m p a r a t i v e l y small.The use in conjunct ion w i t h 'searchlights ofsound l o c a t i n g apparatus has i n c r e a s e d i n somemeasure t h e e f f e c t i v e n e s s o f s e a r c h l i g h t s i n ?nd- > 5i n g and i l l u m i n a t i n g f a s t moving o b j e c t s , sucha s h i g h s peed a i r c r a f t , but the d r a w b a c ks alreadymentioned o f known s e a r c h l i g h t s remain a s f o rmidable o b s t a c l e s t o th e c e r t a i n ?nding and i l l umination o f an o b j e c t p a s s i n g through t h e area 1 0w i t h i n the r a n g e of any g i v e n searchlight.Th e improved s e a r c h l i g h t a c c o r d i n g t o t h e p r e se nt invention i s constructed in s u c h a mannert h a t t h e l i g h t b e a m i s c a p a b l e o f , b e i n g spread o rdiverged l i n e a r l y , preferably t o variable extents 15and without s u b s t a n t i a l r e d u c t i o n o f l i g h t i n t e ns i t y per u n i t a r e a , i n a plane normal t o th e op' t i c a l a x i s o f th e p r o j e c t o r , that i s t o s a y , s o t h a ti t h as a n elongated r e c t a n g u l a r , instead o f as u b s t a n t i a l l y c i r c u l a r , form i n c r o s s s e c t i o n , a nd ' 2 0by t r a v e r s i n g such a s p r e a d o r d i v e r g e d l i g h tbeam b a c k w a r ds a n d for w a r ds a large are a c a nbe rapidly scanned.

    In F i g . 1 the c i r c u l a r area a represents an areao n a screen, s u c h as a cloud l a y e r , illuminated 25by a searchlight beam f c i r c u l a r c r o s s s e c t i o n a lf o r m , a nd t h e e l o n g a t e d rectangulararea 1 ) r e presents an a r e a i l l u m i n a t e d by t h e same beamw h e n spread o r d i v e r g e d l i n e a r l y according . t oth e present i n v e n t i o n . I t w i l l be apparent that 30b y , r o c k i n g o r t r a v e r s i n g t h e l i n e a r l y spread o rdiverged beam a n a r e a , such as represented a t0 , can be scanned v ery much m o r e rapidly t h a nthe s a m e area could be scanned b y the beam p roducing the m o r e limited illuminated area a . 35Th e extent o f th e l i n e a r spread o r divergenceo f t h e be am o f the s e a r c h l i g h t a c c o r d i n g t o t h ep r e s e n t i n v e n t i o n i s p r e f e r a b l y c a p a b l e o f b e i n gv a r i e d a s d e s i r e d and d and e r e p r e s e n t a r e a sw hi ch c o u l d be scanned by th e b e a m w h e n l i n - 4 0e a r l y spread o r d i v e r g e d t o a l e s s e r e x t e n t .As w i l l be appreciated th e maximum p e r - _m i s s i b l e l i n e a r spread o r divergence o f t h e b e a ms h o u l d b e s u c h t h a t s u ? i c i e n t i n t e n s i t y o f i l l u m inat ion i s a l w a y s available.A further f e a t u r e o f the present invention r e

    s i d e s i n c o n t i n u o u s l y looking o r t r a v e r s i n g t h eb e a m w h e n l i n e a r l y spread o r d i v e r g e d . Prefe r a b l y t h e d e g r e e o f l i n e a r s p r e a d o r d i v e r g e n c ei s a u t o m a t i c a l l y a d j u s t e d t o c o r r e s p o n d w i t h t h e 5 0e x t e n t o f t h e rocking o r t r a v e r s i n g movement,that i s t o ' s a y , a s the l i n e a r spread'or divergencei n c r e a s e s the e x t e n t o f th e t r a v e r s i n g m o v e m e n ti s aut omat ically increas ed and vice versa.

    Referring t o F i g s . 2 - 7 i n c l u s i v e o f the accom- 5 5

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    2panying drawings, 1 i s a p r o j e c t o r comprising asource o f l i g h t 2 , s h o w n a s a n e l e c t r i c are l i g h t ,l o cate d at o r n e a r t h e f o cus of a curvedfor e xa m ple a parabolic-re?ector 3 , arranged t o p roj e c t a s u b s t a n t i a l l y p a r a l l e l l i g h t b e a m i n a h o r izontal direction o n t o a mir r or mosaic or a s s e mbl y l l supported on a frame 5 w h i c h occupies aninclined c r o s s s e c t i o n a l area o f th e beam a nd i smounted f o r p i v o t a l o r rocking mo v e m e nt abouta n a x i s 6 l y i n g i n a plane passing through thep r i n c i p a l a x i s o f the p r o j e c t o r I by m e a n s o ftrunnions i w h i c h cooperate with bearings 8 ons u p p o r t s 9 c a r r i e d a t o p p o s i t e s i d e s o f t h e c y l i nd r i c a l c a s i n g i l l . Th e c y l i n d r i c a l c a s i n g l 0 hasa n aperture i l through w h i c h th e b e a m re?ectedfrom the mirror mosaic 4 emerges. Th e casingI l l i s supported f o r r o t a t i o n about i t s l o n g i t ud i n a l a x i s u p o n end m em b e r s i 2 a nd I 3 havingr o l l e r s i t w h i c h eng a g e i n s u i t a b l e r u n w a y s [ 5o n the casing i t .The p r o j e c t o r l , c a s i n g I t a nd appurtenantp a r t s a r e c a r r i e d u p o n a platform H i w h i c h i sm o u nt e d u p o n v e h i c l e I " ? f o r rotation about av e r t i c a l a x i s i 8 . F or t h i s purpose a n e l e c t r i cmotor l 9 c a r r i e d by th e platform [ 6 d r i v e s a gear' 2 8 w h i c h i s i n en g a g em en t w ith a gear 2 ! r i g i d l ysecured t o the v e h i c l e i i .Th e platform i 6 a l s o c a r r i e s a n e l e c t r i c motor2 2 w hi ch d r i v e s through t h e g e a r i n g 2 3 , 2 6 andother gearing no t s h o w n a p u l l e y 2 5 adapted t or o t a t e t h e c a s i n g i t about i t s l o n g i t u d i n a l a x i sthrough s u i t a b l e b e l t t y p e g e a r i n g 2 % ) . L o c k i n gd e v i c e s 2 1 , 2 8 adapted f o r engagement w i t h ?xedp a r t s o f t h e v e h i c l e a r e provided a t each end o ft h e platform l 6 f o r normally h o l d i n g the p l a tform i t } with i t s l o n g i t u d i n a l a x i s i n l i n e withth e l o n g i t u d i n a l a x i s o f t h e v e h i c l e .Th e mirror mosaic f l comprises a n assembly o fseparate reflectorswsome o f which, a s 2 9 , are?x ed u p o n the fram e I i a nd others o f which, a s3 8 , are mounted upon the fr a me 5 so as to becapable o f i n d i v i d u a l rocking o r t i l t i n g m o v em e n t f o r th e pur pose o f spreading or divergingthe r e f l e c t e d beam i n th e m a n n e r hereinbeforereferred t o . As s h o w n the rockable or t i l t a b l ere?ectors 3 9 are rectangular i n form a n d ared i s p o s e d on o p p o s i t e s i d e s o f a plane p a s s i n gthrough t h e p r i n c i p a l a x i s o f t h e p r o j e c t o r la nd normal t o t h e rocking a x i s ' 3 o f the frame 5 .Th e r e ? e c t o r s 3 3 a r e f u r t h e r d i s p o s e d with t h e i rl o n g i t u d i n a l a x e s p a r a l l e l t o the rocking a x i s 6o f the frame 5 a nd t o permit i n d i v i d u a l rockingor t i l t i n g movement they are secured, as by screwso r the l i k e , t o elements, 3 1 m hinged or otherwiser o t a t a b l y c o n n e c t e d t o members i l l ) forming p a r to f the frame 5 , th e hinging o r rocking axes 3 !being s o arranged that they a r e p a r a l l e l t o thep r i n c i p a l a x i s o f t h e p r o j e c t o r w h e n th e frame5 i s arranged a t 4 5 t o th e p r i n c i p a l a x i s o f th ep r o j e c t o r .F or e f f e c t i n g rocking o r t i l t i n g m o v e m e n t o fth e r e f l e c t o r s 3 8 each r e ? e c t o r i s provided witha rod 31a w h ic h extends p a r a l l e l t o th e l o n g i t ud i n a l a x i s t h e r e o f , and b e a r s i n th e r e s p e c t i v eelement 3 9 a a nd a l s o in a block or the l i k e 3H)secured t o the r e f l e c t o r as b y scre ws or th e l i k e .The inner e nd o f e a c h r od 3 t o engages in a n i nc l i n e d s l o t 3 2 i n a guide member 3 2 0 . attachedt o b e a m 3 3 forming part o f th e frame 5 a nd a l s oi n a c o o p e r a t i n g s l o t extending l o n g i t u d i n a l l y

    o f a control bar 5 * w h i c h i s p i vot ed at o ne e nd t othe fram e 5 a t 3 t . With t h i s construction m o v em e n t o f th e c o n t r o l bar 3 5 about i t s p i v o t 3 6e f f e c t s t i l t i n g o f t h e r e f l e c t o r s 3 0 about t h e i ra x e s 3 | , t h e a m o unt o f t h e t i l t i n g m o v e m e n t o f

    2 , 1 9 4 , 8 3 6t h e r e s p e c t i v e r e ? e c t o r s depending upon t h e i rd i s t a n c e from t h e p i v o t 3 6 o f t h e c o n t r o l bar 3 5 .

    In the e m b o d i m e n t o f the invention shown thefr a me 5 i s a d a p t e d t o be r ocked continuouslyabout i t s a x i s 6 f o r the pur pose o f continuouslyt r a v e r s i n g t h e b e a m by an e l e c t r i c motor 3 1through mechanism d e s i g n e d t o p e r m i t o f a djustment f o r t h e purpose o f e n a b l i n g the e x t e n to f t h e r o c k i n g movement, and c o n s e q u e n t l y t h etraverse o f th e beam, t o be varied as d e s i r e d .This m e c h a n i s m may conveniently comprise al i n k 3 8 p i v o t a l l y connected a t one e nd t o theframe 5 a t a distance from i t s rocking a x i s 6 andp i v o t a l l y connected a t i t s other e nd t o a s l i d eo r t r o l l e y 3 9 l o n g i t u d i n a l l y movable with r e s p e c tt o a frame member 9 pivoted a t 4 | o n a support4 2 a nd w h ic h c a n be rocked about i t s p i v o t by al i n k 5 3 , one e nd o f w h ic h i s connected t o a crank4 1 : 1 o n the shaft o f th e mo to r 3 1 . Th e s l i d e 3 9 i sadapted t o be m o v e d a l o n g t h e p i v o t e d framemember l i t ) by means of a n e l e c t r i c mot or 4 5w h i c h d r i v e s a shaft 4 6 engaging the t r o l l e y 3 9through s u i t a b l e reduction gearing i l l a nd as l i p p i n g clutch 4 8 . Th e s l i d e or t r o l l e y 3 9 conv e n i e n t l y has r o l l e r s i t w h ic h engage the framemember 4 0 t o f a c i l i t a t e i t s mo v e m e nt. The ext e n t o f th e rocking o r t r a v e r s i n g m o v e m e n t i mp a r t e d t o t h e frame 5 depends u p o n t h e p o s i t i o nth e s l i d e o r t r o l l e y 3 9 o c c u p i e s along the framem em ber . When th e a x i s o f th e p i v o t a l connect i o n o f the l i n k 3 8 t o th e t r o l l e y 3 9 i s c o i n c i d e n twith the a x i s o f th e p i v o t 4 H no rocking m o v ement i s imparted t o the frame 5 . On the otherhand, a s th e distance be t w e e n these tw o p i v o t a laxes increases th e extent o f th e rocking m o v em e n t o f the fr a me 5 i n c r e a s e s .

    For simultaneously a nd automatically cont r o l l i n g th e spread o r divergence o f the beam a ndi t s t r a v e r s i n g m ovem en t , t h e s l i d e o r t r o l l e y 3 9i s connected with th e c o n t r o l bar 3 5 a nd i n th ee m b o d i m e n t s h o w n the s l i d e o r t r o l l e y 39 i sconnected by m e a n s o f B o w d e n c a b l e s 5 D , 5 4 to th eopposite ends o f a d i f f e r e n t i a l l e v e r 5 2 pivotedbeneath t h e frame 5 , other B o w d e n c a b l e s 5 3 , 5 ! !being connected between t h e l e v e r 5 2 a nd t h ec o n t r o l bar 3 5 a s shown. By t h i s arrangementa ny m o v e m e n t o f th e s l i d e o r t r o l l e y 3 9 producesa corresponding m o v e m e n t o f th e c o n t r o l bar 3 5a nd consequently o f th e t i l t a b l e re?ectors 3 E ! andt h e r e b y e n a b l e s both t h e t r a v e r s i n g mo v e m e nta nd th e l i n e a r spread or divergence o f the beamt o be v a r i e d by operation o f a s i n g l e c o n t r o l .Any s u i t a b l e form o f r e f l e c t o r , such a s a mi r

    rored g l a s s o r h i g h l y p o l i s h e d m e t a l , may be u s e d ,a nd i t w i l l be understood that the p a r t i c u l a rm o d e o f producing the t i l t i n g m o v e m e n t may bevaried in a ny desired manner providing i t i ssuch a s t o enable the beam t o be l i n e a r spreado r diverged i n a pla ne nor ma l t o th e o p t i c a l a x i so f th e p r o j e c t o r . For ex a m ple i n s t e a d o f t h es l o t s a nd 3 d s u i t a b l e s u r f a c e s may b e providedwithwhich the ends o f rods 3 1 a are maintainedi n engagement by m e a n s o f h e l i c a l s p r i n g s eachsecured at one e nd t o a co rresp ond ing rod a nd a tthe other e nd t o the fr a me 5 . S u c h a n arrangement as l a s t described enables the central ?xedr e f l e c t o r ' 2 9 t o be dispensed w i t h .Although t h e S e a r c h l i g h t has been s h o w n a nddescribed herein as mounted upon a m o t o r ro adv e h i c l e i t may obviously be m o u n t e d u p o n anyother form o f vehicle or in a fixed p o s i t i o n .When m o u n t e d u p o n a vehicle th e propellingengine may be employed w h e n th e s e a r c h l i g h t i sbeing used t o d r i v e a d y n a m o f o r supplying t h e

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    2 , 1 9 4 , 8 8 6c u r r e n t r e q u i r e d f o r t h e v a r i o u ss c r i b e d .What I c l a i m i s :l . A e a r c h l i g h t c o m p r i s i n g a p r o j e c t o r adapt

    ed t o p r o j e c t a s u b s t a n t i a l l y p a r a l l e l beam o fl i g h t , a frame m o u n t e d t o occu py a n i n c l i n e d

    p u r p o s e s d e

    c r o s s s e c t i o n a l area o f s a i d beam, a p i v otalmounting f o r s a i d frame l y i n g i n a p l a n e p a s s i n gthrough th e p r i n c i p a l a x i s o f th e p r o j e c t o r , ap l u r a l i t y o f mirrors each mounted u p o n s a i dframe f o r angular adjustment about a n a x i s p ara l l e l t o t h e p r i n c i p a l a x i s o f t h e p r o j e c t o r w h e nth e frame i s a t 4 5 t o s a i d p r i n c i p a l a x i s , meansf o r r o c k i n g s a i d frame about i t s p i v o t a l a x i s , a ndm e a ns c o o r d i n a t i n g t h e e x t e n t o f s a i d r o c k i n gm o v e m e n t with t h e angular adjustment o f s a i dm i r r o r s .2 . A e a r c h l i g h t comprising a p r o j e c t o r adapted t o p r o j e c t a s u b s t a n t i a l l y p a r a l l e l b e a m o fl i g h t , a frame m o u n t e d t o oc c u p y a n i n c l i n e dc r o s s s e c t i o n a l area o f s a i d b e a m a nd pivotedabout a n a x i s l y i n g i n a plane passing throughth e p r i n c i p a l a x i s o f th e p r o j e c t o r , a p l u r a l i t yo f mirrors each m o u n t e d on s a i d frame f o r , a n g ul a r adjustment about an a x i s p a r a l l e l t o th ep r i n c i p a l a x i s o f t h e p r o j e c t o r w h e n t h e frame i sa t 4 5 t o s a i d p r i n c i p a l a x i s , m e a ns f o r simult a n e o u s l y a n g u l a r l y a d j u s t i n g s a i d m i r r o r s t o d i ff e r e n t e x t e n t s about t h e i r p i v o t a l a x e s , m e a n s f o rc o n t i n u o u s l y r o c k i n g s a i d f r a m e , means f o r v a r y ;i n g , t h e e x t e n t o f s a i d r o c k i n g movement, andm e a ns co-ordinating th e extent o f the rockingmo v e m e nt o f the frame with the d e g r e e o f spreadof the beam.

    33 . A e a r c h l i g h t c o m p r i s i n g a p r o j e c t o r a d a p t e d

    t o p r o j e c t a s u b s t a n t i a l l y p a r a l l e l be am o f v l i g h t ,a n assemblage o f mirrors m o u n t e d to occu py a ni n c l i n e d c r o s s s e c t i o n a l area o f saidbeam a n deach a n g u l a r l y a d j u s t a b l e t o permit s p r e a d i n g o fthe beam l i n e a r l y , means for continuously rocking s a i d assemblage t o and f r o , means f o r varyi n g t h e e x t e n t o f s a i d r o c k i n g movement, meansf o r s i m u l t a n e o u s l y a d j u s t i n g t h e a n g u l a r i t y o fs a i d m i r r o r s , and m e a ns interconnecting s a i dmirror a d j u s t i n g means and s a i d assemblager o c k i n g movement v a r y i n g m e a n s whereby s a i db e a m i s s p r e a d l i n e a r l y p r o p o r t i o n a t e l y t o t h ee x t e n t of i t s tra v e rsin g m o v e m e n t .

    4 - . A earchlight comprising-a projector a d a p t e dt o p r o j e c t a s u b s t a n t i a l l y p a r a l l e l beam o f l i g h t ,a n assemblage o f mirrors m o u n t e d a s a w h o l et o oc c upy a n i n c l i n e d v c r o s s s e c t i o n a l a r ea o fs a i d b e a m and a n g u l a r l y a d j u s t a b l e with r e s p e c tt o one another f o r th e pur pose o f spreading s a i db e a m l i n e a r l y , a p i v o t a l mounting f o r s a i d a s ~semblage, a c o n t r o l bar f o r simultaneously an~g u l a r l y a d j u s t i n g s a i d m i r r o r s , a m e m b e r rockableabout a ? x e d p i v o t , a t r o l l e y s l i d a b l e lengthwiseo f said m e m b e r , a l i n k connected t o s a i d a ssemblage at a distance from i t s p i v o t a l a x i s a nda l s o t o s a i d t r o l l e y , andmeans c o n n e c t i n g s a i dt r o l l e y and s a i d , c o n t r o l b a r whereby movemento f s a i d t r o l l e y c a u s e s a proportional m o v e m e n to f s a i d c o n t r o l b a r .

    JOHN CLIFFORD SAVAGE.

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