US2326607A - Hand lamp - Google Patents

Description

' Aug. 1o,` 1943.

C. C. BOHNER HAND LAMP Filed June 1y 1940 ATTORNEYS Patented Aug. 10, 1943 UNI-TED STAT- Es @PAT-.ENT ,oFFice I I 2,326,607 r HAND LAMP ClydeC. Bohner, New HaVen,-Conn., as`signor' to Western lCartridge Company, lNew` Haven, Conn.,'a corporation of Delaware applicati@ junei, 1940, serial No. 333,214V i 1 einen. (Cl. 24o-10.6)

rIhis invention relates to hand lamps and more Y particularly to an improved reflectorl construction and lamp mountingfor hand lamps.

In the ordinary hand lamp construction; the lamp bulb is provided with a threaded stem and is mounted in a threaded socket carriedy by a metal reflector. A later development in hand lamps is the use of prefocused lamps. Y Ther stem of the prefocused lamp bulb is provided with a flange which engages a shoulder on the reflector to hold the lamp in place. Vi/'hereas'the prior type of lamp bulb was inserted from the front v of the reflector, necessitating the use ofaremovable lens, the prefocused lamps are inserted from the back of the reflector permitting the use of Yan integral or permanently assembled reflec- Y tor and lens. However, the metal reflectors now used are not capable of being permanently connected to the glass lens andthe usual constructionrof removable lens is stillfemployed Vwith the cells in the hand lamp vcasing vwithout trans-l mitting such thrust or shocks tothe bulb'.

.In the accompanying drawing I have shownoneform'of the invention. vIn thisv showing the figure is a longitudinalsectio'nal viewofal hand lamp showing the invention applied.

Referring 'to the drawing thereference' numeral E8 designates the frontportion'of aghand lamp casingv whichhouses the usuallbatter'y unit consistingv of one or more cells,'the upperl endof oneof which is'shown 'at A ll.- The casingmay. be provided with the usual end cap (notfshow'n) which is'generally screwed on the rear end of the casing and which electrically connects one teri fminal of rthe battery to'the-casing.- "The casing may be of any suitable form@ As shown' itis pro- Y vided with an renlarged head having aninwardly lamp overcoming several of themostfimportant objections to hand lamps as now constructed.

A further advantage of the use of a reilector formed of glassv or 'other insulatingematerial is the better insulation which it provides.V A metalV reflector -in`engagement with the outer terminal of the lamp Vmust be insulated from the casing, when a metallic casing is'employed, and this is generally accomplished by arranging washers of insulating material around the edge of the reector Where it engages thel casing and and providing means for taking up end-thrust Y or shocks or jars caused by movement of the projecting 'peripheral' ilange 'I2y ati its outer end.

T hereector'i is preferably o-f parabolic form andvis made of glassor other insulating material which can be'molded orstampedfin-to shape.

Various synthetic resin 'compositions may be.`

The reector is provided with 'a lperipheral ilange I4 which restsupon the'ange 'l2 .of the casing when the partsv are assembled y and receives the usual glass'lens l5.' l'I he lens is likewiseprovidedwith ag'flange. l5 which rests Aupon the Viiange M of the reflector. A rib] 'l may employed.

be formed on one Iofftheseanges t'obe {re7 ceived in avcorresponding groove or" the other flange toproperlyposition' the lens and reflector.

siredfshape. I preferably Vernploy glass and'may` use Pyrex glass. The reflectorand' lens may be united to each other by means-of a blow torch.` By constructing the reflectora'nd'lens as anr integralui'iit` permanently secured to eachother I thus provide a dust-proof and moisture-proof construction.

The lens and reflector may be held in position on the casing by means of a metal sleeve or en d ring I8 which is internally threaded as shown formed on the end ofthe casing. This 'end ring vis provided wth'a ange 20 ofthe usual con;

the lens and struction to engage the outside of secure the parts in position. y

As stated, I employ a prefooused bulb which is inserted in the reflector `from the rear. The reilector is provided with a central opening and surrounding the opening I provide an accurately As stated, the lens and reflector Ymaybe 1 permanently secured' to eachfother by fusing'or ground or otherwise formed surface 2| to properly position the lamp bulb. `A metal sleeve 22 is arranged in the opening and is adapted to engage the seat 2|. As shown,rthe Asleeve is oiset inwardly adjacent its upperend forming a shoulder 23 which engages the s cat 2l and the portion of the sleeve beyond this shoulder is adapted to be spun .over the inside Aof the reflector as at 24. This sleeveis of a' proper diameter to receive a prefocused lamp comprising a'bulb portion 25 which is adapted to be arranged within the reel lector and a stemportion 26 which projects rearwardly from the reflector. bulb is provided with the usual retaining flange 21 and this iiange engages the vinner face'of Athe...z

The prefooused end cap a short circuit may be created, permitting the current to flow through the reflector to the outer terminal of the lamp bulb and thus energize it even when the Contact arm' is in inoperative position. Thevpresent construction not only eliminates such insulation but provides much better separationof the, outer terminal and the casing due to the fact that the entire `reector is .made of insulating material.

Thecup 28 snugly fits the sleeve 22 and is movable longitudinally thereon but its downward movement is limited by the presence of the cell shoulder 23. By properly positioning 'the surface 2| and'retaining the flange `2'! of the lamp' against the shoulder 23, the bulb 25 may be pron erly positioned within the reflector.

To retain the lamp against the seat I' provide d a seoond cylindrical member 38 which is closed at lits lower .end forming .a .cupi This member vsnugly lits ,the cylindrical member 22 anflis provided with .an `e1 ong' 1toc slot 21S extending downwardly from its upper edaegso .as to permit a tight fit and to permitthe resiliency of the metal to. retain the :ono-'in :posit-ion.r An 1insulating lwasher anis anranaed on the bottom oi thecup and a :similar washer 3l is arranged With-in the vbottoni y,of the .Cun A rivet` 32 passesv through an enlarged opening 31- in the bottoni of the cup and is :thus insulated from the cup by the wash'- ers 89 and .35 .A metal plate .34 is arranged over ,the washer. ,3l and connected .tothe rivet... A

Coil spring 3,5 yis connected Ywith this plate. the l Snrlnebeingfpreferablv in .tlie form of a spiral being .so arraneedtnat its upperpend contoets with Vcentral terminal $6 .of the lamp brilla. rivet 32 is adapted 'oo-.contact with :the 'zentral termi-nal 31 of the upper cell ofthe battery. :thus oon-:lectine"V one terminal of the lamp to the battery. Flow of current to the lamp 'may be controlled by o suitable switch mounted on cosine (not shown) .and controlling a oontaot .arm 38 which'my be moved into and .out ,of engagement with the cup 218 or the Sleeve E?` When the arm 38 is engagement Ywith the cup f orleevo. the .Circuit nom the Outer terminal is' .completed .throughthe sleeve 2,2 and lange V5i to the outer. terminal of the lamp .bi-1lb.

construction heretofore described not only provideseN dust-proof and moisture-Proof hand lamp -but also provides better insulation between the outer terminal of. the lamp and the easing. In the .usual .construction uf-liano lamps. 1employing a meta-1 reileotor, insulation between the flange AI4 of .the zeflootor and the end flange l2 of the metal v.casing inneoesgsary and .it is Gustomary t0 provide insulation surrounding the Per ripheral edge of the (lens, If `this linsulation becomes wet through leakage of Water .2l-round the l! `so that itcanot move downwardly a sufficient distance to become v.disengaged from the sleeve. When Va thrust ,is .exerted on the cup by move;

gment volf the .cells in the hand lamp casing, as frequently occurs, the upward movement of the cup 4toward the lamp compresses the spring 35 and 'lion- 61, ,a reflector of insulating material mounted in the head., a lens permanently mounted on the reflector. the relotor -being provided-with a cenopening, the rear face ,of the ,reflector adjacent the Aopening beineishaped to -form o seal;

normal .to the .airis of the nana lamp to properly position .a lamp. supporting meinben a sleeve-like lamp supporting. inem-ber havineits .forward end spun' over the reflector around the central opening to secure it to the reflector, the sleeve-like -rnember Vhaving an. interior shoulder, a lamp Vn1.onnte 21-ln the *sleeve-like. member with the 'ou-lb projecting throuehitno central opening of the reflector, the stern .of Ytlie lamp beine orovided with means Cooperating with the shoulder -ln'` the sleeveflliemember to limit the forward d Y movement of.v the-lamp, a slotted, cup-,shaped member snugly ondslldobly fitting the roar ond .of the sleevedike member, a spring, mounted in the cup-shaped member end engaging the lamp bulbi, tolllgo tzOlWrdly in 4the sleeve-like `inein-` ber, ,and a Contact member mounted in the bottomof thejcup-shaped member and insulated therefrom, the contact member `being adapted -to engage the upper termmal of the battery to -electr-ically connect the base of the: lamp bulb to the battery terminal and to limit the rear-ward kslid-ing movement :of the cup-shaped member..

.CLYDE C, Anonnina.

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