US 3078367 A
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Description (OCR text may contain errors)
Feb. 19, 1963 H. JACKSON PORTABLE LAMP BRACKETS 3 Sheets-Sheet 1 Filed July 20, 1960 Feb. 19, 1963 JACKSON 4 3,078,367
PORTABLE LAMP BRACKETS Filed July 20, 1960 5 Sheets-Sheet 2 B ul fim 1 Arr s.
Feb. 19, 1963 H. JACKSON 3,078,367
PORTABLE LAMP BRACKETS Filed July 20, 1960 3 Sheets-Sheet 3 "5 EyiZ I/vvc-rv roe nited Filed July 20, 1960, Ser. No. 44,216
3 Claims. (Cl. Zed-52.1)
This invention relates to hand lamps and inspection lamps having grip-on supports which include spring-actuated gripping means so that they can be attached temporarily .to any part adjacent the place of use. i
It istherefore the object o fthis invention to provide forms of hand lamp and support of a small type which satisfy the aboveand other needs. I
It is an object ofthe inventionto provide an improved hand lamp or inspection lamp which includes a grip-on support comprising a pair" of. mutually-pivoted members having opposed gripping jaws atone end with opposed. flat griping faces and grooves therein, having handle parts adapted to be gripped in 'one'hand at the other end and having spring means between'said handle parts to urge those jaws towards each other.,
It is another object of the invention to provide such a lamp with a lateral extension from one or both sides of the said mutually-pivoted members, with a ring formation at its outer end, and a lamp ,mountingonthe or each ring formation, said ring and mounting being rotatable about an axis transverse to the said mutually-pivoted memhers against a friction load which, whilst causing it to remain in any set position in its path of rotation allows of its position being changed without adjustment of the load.
A further'object of the invention is to attract the said jaws at the one end of the pivoted members fixedly or resilie'ntly and/or pivotally so as, in the latter cases, always to provide a face contact with the article being gripped, independently of the degree of opening of the jaws. Alternatively the jaws may be detachable from the said members, for interchange with others.
The invention will be described in more detail with reference to the accompanying drawings, wherein:
FIG. 1 is a perspective view of one example of the improved lamp, shown as gripping a bar or rod;
FiG. 2 is a plan of the same but with the lamp-holder and cage turned through 90 as compared with FIG. 1; 7
FIG. 3 is a transverse section through one of the pivoted members of FIGS. 1 and 2;
' FIG. 4 is a plan of a part of a slightly modified form of lamp shown in FIGS. 13;. p v
FIGS. 5, 6 and 7 are fragmentary perspective views illustrating some alternative forms of the improved lamp, insofar as they concern the mounting of the lampholder and cage on the pivoted members; I
FIGS. 8, 9 and 10 are fragmentary side elevations showingsome alternative constructions of the gripping jaws; and
, beadopted, if of suitable strength, for biassing the levers in this way.
The other and shorter ends of the levers l, 2 have their flanges partly cut away to receive transverse jaws or pads 7 of a hard rubber or synthetic rubber or like material having good gripping qualities. These pads are each reinforced or supported at the back by a rectangular metal plate 8, and are afiixed to the levers 1, 2 by screws passing through the bridge portion of the channel-sectioned member, and by nuts thereon.
Any other kind of fixing means may be adopted of either a permanent or removable nature. With jaws fixedly mounted on the said members, the leading or entrance edges of the jaws may be bevelled at various angles, or may be rounded, so as to have a strip or ribbon contact rather than a mere line contact with articles whose thickness is within the lower range of capacity of thejaws.
The said jaws may, alternatively, be formed as or on wedge-shaped parts,.so as to throw the two gripping faces further into alignment with each other when closed without gripping any object, and to allow the two jaws to have their gripping faces parallel more quickly.
The same result can be achieved without the wedgeshaped parts by having the two pivoted members slightly bent away from one another at the jaw ends.
Each pad 7, on its gripping face, is channelled at 7a on its longitudinal and transverse axis, to receive roundsectioned or other rod-like objects (see FIG. 1), and some .or all the gripping faces are serrated or similarly broken to increase the frictional grip.
Rotatably mounted in one of the lever members, near the pivot is a short bar or rod 9 extending laterally from one side of that lever member, and carrying at its free end a flat metal ring 10, this ring lying in a plane at right angles to the general plane of the mutually-pivoted members l, 2.
As will be seen more clearly from FIG. 3, the laterallyextendingrod 9 has a reduced portion 9a passing through the lever member and secured at its extremity by a nut 9b, While a sleeve or bush 9c surrounds the portion 9a between the 'websof the lever member. A spring washer 13 is provided so. as to give a frictional fixity to the lamp FIGS. 11 and 12 are fragmentary perspective views showing further modifications of the grippingjaws.
Referring first to FIGS. -3, there are two channelsectioned lever members 1, 2 having lugs 3 on their side Webs, the lugs 3 on one being embraced between the'corresponding lugs on the other member and a pivot pin 4 passing through the several lugs. This pin is held in place by a nut or the like 5 at each end, though other securing means may be adopted. The said lugs 3 are somewhat nearer to one end of the lever members 1, 2 than to the other.
Between the longer ends of the lever members 1, 2 and fitting within the opposed channels is a substantially. U- shaped fiat-sectioned spring 6 which forces those ends of the levers apart.
in any adjusted position of the rod 9.
To one side of the said ring 10 is clamped a ring 11 of insulating material carrying a bayonet-type lamp holder 12.
The outer edge of the said ring 11 of insulating material is grooved or recessed (see FIG. 2) to receive rotatably a ring14 which constitutes the rear or smaller end of a tapering wire guard or cage 15 adapted to' enclose a lamp carried in ,the lampholder. The outer endwall 16 of the cage 15 is hinged so as to be movable for insertion and removal of the lamp. The cage is pro-Q vided with a curved reflector or shield 17 in a known manner. g .1
The top part of the lampholderprojects through the said metal ring 10 and is shielded by an open-ended cylindrical wall 18 carried on the ring 10 by its flange 18m This allows of easy access to the lampholder for wiring up purposes but protects the lampholder against breakage. When the lamp is to be. used only with low Any other form of spring means may 7 voltage currents, the shield 18 could be omitted. Instead of, the lateral extension 9 being .rotatable the lever, in a modification it may be afixture th ein, in which case the fiat metal ring lllicarr yingthelarnp holder will be rotatably mountedfionl oraboutithe axis of said extension. In this easegane; n-i'etidajme'ati such as a spring washer will be interposed as abraking rneahsto'prevent'atoo-free rotary, ing parts.
As will seen, the 1am mp rig. U I g g j n axis transverse retire lever bersi'; 2, "and will remain in any set angular position. In use, the longer ends of the levers 1, 2 are grasped in the hand and squeezed together so as to open the jaws 7. After passing the open jaws over the article to be gripped, the handles are released, thus allowing the jaws to close on the object, and then the lamp is rotated about the said extension 9 into the required position.
Referring now to FIG. 4, the said flat metal ring 19 is pivotally mounted on the lateral extension at 19, with frictional restraining means, so that an additional adjust ment movement may be given to the lamp in a plane which contains said transverse axis.
Although channel-sectioned levers have been described for the parts 1, 2, levers of any other crosssection may be used, and in any case the said rotatable extension 9 may include a radially-displaced part so as to increase the diameter of circle through which the lamp may sweep. Such an arrangement is shown in FIG. 5, where the extension 9 is bent to include a limb 29.
Referring now to FIG. 6, the rigid lateral extension 9, bent as in FIG. 5, carries a stiff flexible conduit 21 on the free end of which the ring lamp holder and cage would be mounted. In such a case, the cable for the electric current could be passed through the flexible conduit and the rigid extension itself could be made hollow for the same purpose.
In the embodiment shown in FIG. 7, a slotted member 22 (which can be of any length) is secured to one side of one of the lever members 1, 2 so as to extend above or outwardly from the pivot. In the slot 23 of this member, any form of lateral extension as previously referred to can be made to slide up and down and be adjusted to desired points, so giving a variable position to the axis of rotation of the lamp mounting with reference to the handles 1, 2. In the precise arrangement illustrated, a rigid straight arm 9 with ring is held in the slot by screw and nut means. The member 22 could, if desired, be placed at other points along the lever member.
The invention may include the feature that one or bothL said mutually-pivoted members has means for setting its jaw in any one or" a number of selected positions, according to the size of the article that is to be gripped. For this purpose, each such member may have an outstanding extension with means for locating a jaw in any one of a series of locating formations on said extension, the arrangement being such that the eventual gripping pressure tends to increase the security of said jaw in the selecting locating formation.
Such arrangement is illustrated in FIG. 8, where the jaw-holding end of the lever 1 is made to extend out at right angles to the main length of the handle, as shown at 23, and the outwardly-turned face is serrated. The jaw 7 is carried by a separate unit 24 which is shaped to encircle the aforesaid outwardly-turned part 23 and carries a pawl 25 to engage the serrations. The unit 24 and its jaw are held in the selected position by means of a screw 26.
This construction allows of a variable jaw gap, which is first set roughly to the size of the object to be gripped, the approach of the jaws towards each other being limited by the pin and slot connection 27. When the handles are squeezed, to open the jaws in relation to each other, they may then enclose the object to be gripped.
FIGS. 912 show various forms of jaw mounting. In FIG. 9, the jaws 7 are of wedge shape so as to have their gripping faces parallel when closed, and in FIG. 10, for a similar purpose, the levers 1 and 2 are formed so as to be parallel at the jaw ends when the jaws are closed, the jaws in this case being of block section.
FIG. 11 shows a form of floating jaw which will always lie flat on the object being gripped, whatever its thickness, and in FIG. 12 the jaw is shown adapted for rotation in its own plane so as to be presented to an object either widthwise or lengthwise.
The jaws may be fashioned of rubber neoprene, any
form of plastic, asbestos, steel, wood or the like. The whole of the assembly, i.e. the pivoted members, the lateral extension, the cage and the ring 10 can be totally insulated by covering them with a plastic or similar insulating material. The cage could itself be a moulding, either in whole or in part.
In some cases, a miniature shade can replace the larger cage shown, and carry a small electric bulb, thus keeping the whole assembly as small and compact as possible, enabling the bulb to be pushed down into very confined spaces, whilst being rigidly held in place by the grip of the jaws some distance away.
What I claim is:
1. A portable lamp bracket for an electric lamp bulb comprising a pair of mutually-pivoted channel-sectioned members carrying opposed gripping jaws at one end, said jaws having opposed flat gripping faces with V grooves therein in two directions at right angles, said members also carrying spring means to urge said jaws towards each other with the grooves of one opposite the grooves of the other, a support member pivotally mounted in the webs of one such channel-sectioned member adjacent the pivot for said members and extending laterally from one of said webs, a ring formation on the outer end of the support member, a disc of insulating material mounted on said ring formation and having an external peripheral groove, a lamp holder carried by said disc within said ring formation and a wire cage rotatably mounted in said peripheral groove with a reflector of arcuate section in said cage concentric with the axis of said lamp holder.
2. A portable lamp bracket comprising a spring clamp of metal with transverse pivot axis, jaws of electrically non-conductive material on said clamp, a metal pivot member in said clamp rotatable on an axis parallel to and close to said transverse axis, a ring formation at one end of said pivot member and a disc of electrically nonconductive material secured to said ring formation concentrically therewith, said disc having a peripheral groove in an exposed outer edge, a lamp holder fixedly carried by said disc at the center of said ring formation, and a wire cage to enclose a lamp when in said lamp holder, said cage including a ring at one end lying rotationally in said peripheral groove and including also a reflector to rotate with it about the axis of said disc.
3. A portable lamp bracket comprising a spring clamp of metal with transverse pivot axis, jaws of electrically non-conductive material on said clamp, a metal pivot member in said clamp rotatable on an axis parallel toand close to said transverse axis, a ring formation at one end of said pivot member and a disc of electrically nonconductive material secured to said ring formation concentrically therewith, said disc having a peripheral groove in an exposed outer edge, a lamp holder fixedly carried by said disc at the enter of said ring formation, and a cage of electrically conductive material to enclose a lamp when in said lamp holder, said cage including a ring at one end lying rotationally in said peripheral groove and including also a reflector to rotate with it about the axis of said disc.
References fitted in the file of this patent UNITED STATES PATENTS 1,690,491 Knauif Nov. 6, 1928 1,722,773 Stewart July 30, 1929 1,895,410 Figlia Jan. 24, 1,933 2,034,913 Kros Mar. 24, 1936 2,087,812 Peluse July 20, 1937 FOREIGN PATENTS 824,019 France Oct. 25, 1937 695,397 Germany Aug. 24, 1940 575,864 Great Britain Mar. 8, 1946 771,963 Great Britain Apr. 10, 1,957