Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2546242 A
Publication typeGrant
Publication date27 Mar 1951
Filing date6 Nov 1947
Priority date6 Nov 1947
Publication numberUS 2546242 A, US 2546242A, US-A-2546242, US2546242 A, US2546242A
InventorsStinson Robert E
Original AssigneeStinson Robert E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Two-part clamp for attaching illuminating means to gun sights
US 2546242 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)


Inventor Roe/f E. Sfinson Patented Mar. 27, 1951 UNITED STATES PTENT OFFICE TWO-PART CLAMP FOR ATTACHING ILLU- MINATING DIEAN S TO GUN SIGHTS Robert E. Stinson, Galion, Ohio Appiication November 6, 1947, Serial No. 784,437

3 Claims. 1

The present invention relates to a gun barrel attachment embodying a source of illumination and ways and means to confine and focus light rays therefrom on a front sight in a manner sufficient to enable said sight to be employed, with reasonable accuracy, under adverse sighting conditions.

There are times, when one is hunting at night or at dusk, when the conditions of existing natural light are such that efiective sighting is almost impossible. This is particularly true when the gunner seeks to aim and fire from thick woods, underbrush and the like. Because of such circumstances I have devised a gun barrel attachment wherein a source of artificial light, such as from a flashlight or the like, handily illuminates the front sight with sufiicient eifectiveness that it may be satisfactorily employed, that is, where the object being shot at, is fairly well visible.

It will be seen from the foregoing, that I am full well aware that flashlight batteries have been built into special encasing attachments and have been used in divers ways for fulfilling the requirements ofilluminators in the class under advisement. In carrying out the principles of the present invention I have devised a barrel sight illuminator attachment, wherein novelty is predicated, primarily, upon the details of construction. To this end, one object of the invention is to provide a battery holder and light rays directing unit, same being provided with satisfactory clamping members whereby it may be effectively perched upon the barrel within the vicinity of the sight, and readily applied or removed.

More specifically, it is an object of the invention to provide a plastic body, which has a socket forming a receptacle for a dry cell and also having coacting depending wall portions in opposed relation definin an open-ended tunnel which houses the gun sight and confines the projected light rays effectively on said sight. Another object of the invention is to provide a simple closing plug for the battery-holding receptacle which is conveniently constructed and arranged to facilitate switching the source of light on and off, as desired.

Another object of the invention is to provide simple and effective clamping means carried by and depending from said plastic body and readily and conveniently attachable to the gun barrel.

Other objects and advantages will become more readily apparent from the following description and the accompanying illustrative drawing.

In the drawings. wherein like numerals are 2 employed to designate like parts throughout the views:

Figure 1 is a perspective view of a fragmentary portion of the gun barrel, showing the improved gun sight illuminator attachment in place;

Figure 2 is a view on an enlarged scale, showing the attachment with parts in section and elevation, the gun barrel being fragmentarily shown;

Figure 3 is a rear end elevation, that is, a view observing the attachment device from the inner end of the barrel;

Figure 4 is a sectional view on the line 4-4 of Figure 2, looking in the direction of the arrows.

Referring now to the drawings by distinguishing reference characters, the gun barrel is denoted at A, the stock at B and the bead-type gun sight, that is, the front sight, by the reference character C.

The illuminator attachment comprises a plastic unit, with the source of light included therein, which is generally denoted by the numeral 6, and clamping means for said unit, generally denoted by the numeral 1.

The unit 6 comprises what may be identified as a body portion 8 whose major part is fashioned into a holder for a flashlight. More specifically, this part is a cylindrical receptacle 9 which is open and internally screw-threaded at the righthand end in Figure 2, and tapered and closed at the left-hand end as at I ll. A dry cell battery 5 l is fitted into the receptacle 3 and at the lefthand end, has contact with a suitable flashlight bulb l2, a coiled spring I 3 being interposed between the bulb and battery to normally separate the two and break the circuit. A screw plug [4 is fitted into the opposite end of the receptacle and this abuts the battery and serves to slide same in or out for opening and closing the circuit, in an obvious manner. The plu is op erated by a knurled finger-grip [5 having an indicator arrow l5, which is registrable with either of the on or off lugs I! and I8 respectively. The light-beam is projected through a restricted diagonal passage l9 within the vicinity of the bulb and into a passageway or tunnel 20, defined by opposed parallel curvate walls 2| and 22. The opposed longitudinal edge portions 23 of said walls are spaced apart and straddle the sight C. The clamping means 1' is attached to said edge portions 23. Actually, the clamping means provides apair of clamping jaws or grips 24, which fit around the barrel and which have return-bends 25 attached to said edges 23. The clampin members are also provided with ears 26, which are secured together by a thumb-bolt 21. This bolt has a knurled or milled marginal grip for convenient finger operation and is also provided with a screw-driver kerf 28. Thus, the unit 8 is detachably and adjustably mounted on the gun barrel by the clamping means 7. Referring again to the unit 5, it will be seen in Figure 1, that the exterior of the body portion is provided. with ribs 28 and 29 which may be employed as anti-slippingigrips. It follows that said grips expedite the step'of handling the attachment, that is, applying and removing same.

Referring further to the clamping unit 7 it will be seen that the respective-jaws or'grips 2 3i are substantially semi-circular incurvature and embrace diametrically opposite sides oithegun barrel A. The bolted cars 26 are located on the bottom of the barrel and the out turned"b'ends or keys are thus located on the top ofith-e barrel and as a matter of fact on opposite sides of. and parallel to the sight C. By fitting. the

bends? 5" into the'lohgitudinal grooves 29a in the stated edge portions 23 of said walls, the grooves function as key-ways and the bends 25 function as keys fitting. into said-key-ways. Obviously,

withthis'coaction of elements the entire unit- 6 is'both" slidably and d'etachabl mounted on and carried by the clamp unit I. It is also'evident that'when thebolt 27 is tightened in the ears 26, the'ears are drawn together and the keys'25 ri'deoutwardly and away from each other'and are frictionally, bound in the key-Ways. Hence, the grips 24 rock slightly on the barrel andproduce a result in whichthe keys actually function as detents. Conversely, when the bolt 27 is loosened the'retentive forces ofthe'detents serve to loosen sameand to allow the'unit 9' to be shifted on the unit-I freely or'to be entirely detached from said unit I. It follows, therefore, that novelty is predicated'upon the provision of a novel clamping' unit 7 on a gun barrel where the unit serves as'amount'on which the illuminating unit is shiftably and detachably mounted and wherein the keying action between the keys and key-ways is'unique in that the keys have the function of friction retaining detents. g

A* careful consideration of the foregoing description in conjunction with the'inve'ntion as illustr'ated'in'the drawings will enable the reader to obtain" a clear understanding and impression of the alleged features of merit and novelty sufficient'to clarify the construction of theinvention as hereinafter claimed.

Minorchanges in shape, size, materials and rearrangement of parts may be resorted'to in actual practiceso long as no departure is made from'the invention as claimed.

' Having described the invention what i claimed asnew is:

1. In a structure or the class shown and described,- in' combination, a gun'barrel havinga from; sight, clamp means mounted onsaid' barrel adjacent to said sight and including, a pair of grips provided on their upper ends with hooklike terminals providing'k'eys, and an illuminator unit comprising a body, having spaced walls defining an' open 'ended tunnel-like passage onclosing said. sight, said wallshaving grooved edges spaced apart, said grooves forming keywayssaid k'ey's'fitting into the latter and said unit being bodily shiftablei in relation to said keys and sight, a fiashlight'carried by said unit and embodying a flashlight bulb in and abutting the closede'ndportion of said receiver, a. dry cell in said receiver, a coiled spring, interposed between and spacing'said dry cell and bulb, the open end iii portion of said receiver being screw-threaded, and a screw-plug screwed into said receiver and contacting said dry cell, said screw-plug serving to compress said spring and to press the dry cell into contact with said bulb.

2. In an illuminable gun sight of the class shown and described, in combination, a gun barrel having a front sight, a clamping unit detachably mounted onssaid gun barrel within coacting vicinity of said front si'ghtembodying a pair of duplicate opposed grips, said grips having ourvate portions conforming to the coacting curvatures of'th'e 'gun' barrel, said grips being adjustably anddetachably bolted together on the undersideiofsthe barrel and having their upper ends projecting above the barrel and terminating iiilaterally -outturned keys, and a separate illuminator: unit including a source of illumination'and embodying opposed wall portions defining. an open-ended tunnel-like passage in communicati'on with" the' source" of" illumination and'encompassingsaid sight, the edgeportions' of: said wall portions having grooves and" said grooves'constituting keyways; said keys" fittin into said keyways', whereby said illuminator unit is'both detachably andshiftably mounted on said gun barrel.

3. Attachment means 'for illuminating 'arfront sighton a gun barrel comprisingjaclampingata tachmentembodying a pair of duplicate grips, of; general" semi-circular form bent intermediate their ends' to embrace and conform to diamet rically opposite side'portions of a cylindrical gun barrel, the grips at their lower ends being fashioned-into ears, the'grips on their'upp'er' ends being provided with outturned' bends constituting'keys'on'theone hand and retaining: detents on the other hand; and a bolt for ad justably interconnecting said ears, said bolt, when tightened, serving to spread the detent apart and, whenloosened,permitting the detents to swing. toward each other, and a one-piece'molded' plastic il-luminatorunit including a body portion substantiallycylindrical in cross section defining a receiver; the receiver being closed at thefor ward end and internally screw-threaded" and 'openat 'itsrearward end, the forward end p'or' ti'on'being'provided with an aperture for passage of a light beam, said unit further'inclu'ding op-- posed curved side walls defining an open-ended tunneI-likepassage, the free edges'of saidsid'ewalls being in opposed parallelism and grooved to provide keyways' for removable reception'o said keys. ROBERT E; STINSONE REFERENCES -CITED The following: references are of recordin the file 'ofthis patent? UNITED STATES PATENTS Number Name Date 333,232 Kopf. Dec, 29, 1885 586,295 Terry: July '13, 1897 807,993 Bassell et al; Dec. 19', 1905 873,591 Penfield 1. Dec. 10, 190.7 880,294 Getchell Feb. 25,1998 1,932,473 Morgan et a1. Oct; 21, 1933 I 2,158,915 Searcy May16, 1939 2,249,690- Gelardin July 15; 1941 2,307,745 1 Lutz et al. Jan. 12, 1943 2,442,893 Henderson June 8, 1948 FOREIGN PATENTS Number Country Date 190,745' Switzerland May 15, 1937

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US333232 *19 Mar 188529 Dec 1885Thomas BJohn kopf
US586295 *26 Dec 189613 Jul 1897 Ernest d
US807993 *17 Jul 190519 Dec 1905John Y BassellGun-sight.
US873591 *17 Sep 190610 Dec 1907Charles R PenfieldLight-projecting attachment for firearms.
US880294 *21 Jan 190725 Feb 1908Frank B WebberRifle-sight-lighting means.
US1932473 *14 Oct 193231 Oct 1933Charles A MorganIlluminating tongue depressor and nose and ear speculum
US2158915 *7 Apr 193716 May 1939Searcy Hilton BRifle front sight illuminator
US2249690 *26 Mar 193715 Jul 1941Gelardin AlbertFlashlight
US2307745 *3 Aug 194012 Jan 1943Edelmann & CoHydrometer
US2442893 *7 Dec 19468 Jun 1948Roy Henderson MalIlluminated screw driver
CH190745A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2836449 *14 Apr 195427 May 1958F E A L SocietaClamping arrangement
US3698092 *12 Mar 197017 Oct 1972Moroni CorpNovel illuminated gun sights for small arms
US3701546 *21 Dec 197031 Oct 1972Fichtel & Sachs AgBicycle and gear shifting arrangement for the same
US3833799 *15 Dec 19723 Sep 1974N AudetGun sight system for use under low ambient light conditions
US3974585 *24 Oct 197417 Aug 1976Dunham Charles WGun sight night lighting attachment
US4912852 *24 Mar 19883 Apr 1990Sanders Ronald JViewing apparatus
US5046277 *2 Jan 199010 Sep 1991Sanders Ronald JMounting device for sight viewing apparatus
US5208989 *9 Sep 199111 May 1993Sanders Ronald JSight viewing apparatus
US5400540 *8 Oct 199228 Mar 1995Insight Technology IncorporatedAiming light and mounting assembly therefor
US5430967 *16 Dec 199311 Jul 1995Insight Technology, Inc.Aiming assistance device for a weapon
US6345464 *13 Jan 199912 Feb 2002Surefire, LlcFirearms with target illuminators, electric switching devices and battery power sources
US65749013 Nov 200010 Jun 2003Insight Technology IncorporatedAuxiliary device for a weapon and attachment thereof
US71176246 Apr 200410 Oct 2006Surefire, LlcAccessory devices for firearms
US731090330 May 200625 Dec 2007Surefire, LlcAccessory devices for firearms
US732535224 Jun 20045 Feb 2008Surefire, LlcAccessory devices for firearms
US736033317 May 200622 Apr 2008Surefire, LlcAccessory devices for firearms
US759109812 Dec 200522 Sep 2009Surefire, LlcAccessory devices for firearms
US7854085 *4 Feb 200821 Dec 2010Highlander Security Consulting, L.L.C.Gun barrel attachment
US7882654 *11 Jul 20088 Feb 2011Elzetta Design, LLCAccessory mount for a firearm
US82262675 Oct 200924 Jul 2012Streamlight, Inc.Mountable light circuit structure
US83717295 Oct 200912 Feb 2013Streamlight, Inc.Light with keying arrangement mountable on a mounting rail
US965803119 Dec 201223 May 2017Laser Aiming Systems CorporationAuto on green laser sight
US20050217162 *24 Jun 20046 Oct 2005Surefire, Llc, A California Limited Liability CompanyAccessory devices for firearms
US20060196099 *12 Dec 20057 Sep 2006Surefire, Llc, A California Limited Liability CompanyAccessory devices for firearms
US20070074444 *17 May 20065 Apr 2007Kim Paul YAccessory devices for firearms
US20070234623 *21 Dec 200511 Oct 2007Carney Sean RApparatus for securing a device to a weapon
US20070277422 *31 May 20066 Dec 2007Leapers, Inc.Firearm target illumination implement
US20100020535 *5 Oct 200928 Jan 2010Sharrah Raymond LMountable light circuit structure
US20100097789 *5 Oct 200922 Apr 2010Sharrah Raymond LLight with keying arrangement mountable on a mounting rail
US20120180370 *2 Nov 201119 Jul 2012Mckinley Nicholas RichardGun sight flashlight adapter
CN101525963B4 Mar 20088 Aug 2012中国国际海运集装箱(集团)股份有限公司Linked lockset
EP0061433A2 *15 Mar 198229 Sep 1982Antonio DiomediNight sight
EP0061433A3 *15 Mar 19822 Feb 1983Antonio DiomediNight sight
U.S. Classification42/146, 248/231.21, 248/230.1
International ClassificationF41G1/34, F41G1/00
Cooperative ClassificationF41G1/345
European ClassificationF41G1/34B