US 836303 A
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Smmm 621-132 55 j'zlwzwlflglw PATENTED NOV 20, 1906 G. V. J. CHRISTENSEN. AUTOMATIC LOCKING COLLAR.
APPLICATION FILED APB. gs. 1906.
UNITED PATENT ,OFFIGE. CARL V. J. CHRISTENSEN, OF ATTLEBORO, MASSACHUSETTS.
' AUTOMATIC-LOCKING COLLAR.
' had therein to t e accompanying drawings.
This invention relates to self-locking collars, and has for its object to provide a collar that may be adjusted either up or down on a spindle and one that will lock automatically in any position on said spindle against a further movement in one direction, or, if desired, the collar may be fixed and the spindle may be moved up and down at will through said collar and be locked automatically against a further movement in one direction.
' The device is constructed of a shell or collar having located within it one or more plates similar in construction to a washer, said plates being arranged to automatically cramp or bind and grip the spindle when the same is trying to pass through in one direction.
A feature of this invention is that the hole in said Washer or plate through which the spindle asses is made polygonal in form, preferab y hexagonal, so as to concentrate the bite of thegrip-plate into four distinct points, two in back and two in front, instead of distributing the said bite over a greater contact-surface, as would be the case if the hole in the plate were round. This form of hole that has straight sides insures a bitethat will not slip, even when applied to a spindle having a hardened surface and willsustain a heavy load with safety.
The invention is fully set forth in this specification and more particularly pointed out in the ap ended claims. v v In t e accompanying drawings, Figure l s a view showing the collar in 'sectionand the grip-platein position to bind the spindle.
Fig. 2 is the same as Fig. 1 with the exception that there are two grip plates forbinding the spindle instead of one. Fig. 3 re resents a plan view of the grip-plate as 1 ustrated in Fig. 1, showing it in position to present the'four distinct points incontact with the spindle. Fig. 4 is an edge view of said grip-plate, showing the actuating end or handle. Fig. 5 represents a plan view of the grip-plate, showing the contact-finger raised out of the stock, such as that illustrated in Specification of Letters Patent.
Application filed April 26, 1906. Serial No. 318,828..
' ?atented. Nov.20,1 906.
the lower plate in Fig. 3. Fig. 6 is an edge View of sa1d plate in detail, showing the contact-finger. Fig. 7 is a sectional 'plan view of the shell or collar on line 7 7 of Flg. 1. Fig. 8 re resents a support in which the shelf of a disp ay-stand rests upon the collar, which automatically locks itself to the standard.
Fig. 9 represents another style of displaystand in which the weight is applied to the spindle instead of the collar, giving the reverse action to the grip-plates to that illustrated in Fig. 8. display-stand, which has my automatic looking collar connected to the spindle, Whichacts similar to that illustrated in Fig. 8.
Fig. 10 is another form of Referring to the drawings, at 1 is the spin- I dle, which may be used on a bracket, extension-stand, or the like, as shown in Figs. 8, 9, and 10, or it may serve in any other capacity in connection with my device where the same ma be conveniently applied. At 2 .is the edge of the grip-plate, a little tongue 4 is formed by pressing in a narrow piece of the side or wall of the shell, the wall directly ,opposite this tongue being slotted at 5 to admit of'a movement of'the actuating-handle of the said gri -plate. When it is desired to use the shel on a tube, it may be screwed onto the same, as illustrated at 6 in Fi 1. p
A cap or cover 7 may be fitted mto the upper edge of the collar to inclose the same and also to form an upper bearing on the spindle or shaft. This cap maybe permanently retained in its osition by having the upper edge of the collar turned over the same, if desired, as illustrated in Fig. 2, or said cap may be removably fitted into the upper edge of the collar, as illustrated in Fig. 1, to allow the sameto be readily removed for inspection or repairs of the operating parts. This latter construction is found in practice'to be very convenient and that for ordinary service the said cap may be sprung into the thin metal collar and held firmly in position without the necessity of using further retaining means.
At 8 is the grlplate, preferably made of circular form, as shown in Fig. 3, with a narrow neck or projection 9 extending from one side thereof and turned up at its outer end at 10, with the outer face of the turned-up portion knurled or roughened to be more readily engaged by the thumb or finger to lift it. Through this plate is formed a hole, preferably hexagonal in shape, the essential feature being to form an angular hole that will present a plurality of contacfipoints to the spindle when tipped up on an angle, as shown in Fi 1.
As illustrated in Fig. 3, a hexagonal hole presents four contactoints 13 13 and 14 1.4, two in back and two H1 front of the spindle, which, as determined by experiment and practical experience, gives the best possible results to the gripping-plate. This plate, as shown in Fig. 1, fits loosely in the shell 2 and has its extending ortion or handle 10 projecting out throug the slot 5 in the wall of said shell, the opposite side of the plate being sup orted on the little ton ue 4. At 11 is a sma l coil-spring to normal y hold said plate down in contact with the s indle, one end of said spring being turned own through the hole 12 to hold it in place.
Figs. 2, 5, and 6 illustrate another construction of my device, in which two griplates 15 and 16 are shown instead of one, as in Fig. 1. Each of these plates may be supported from the back edges on separate tongue 4 4; but both may be operated to release the spindle by the upward movement of the lower plate. As is lllustrated in these figures, this plate-is provided with a horn or finger 17, which will engage and raise the u per plate when the lower plate is raised. t 18 is a coil-spring pressing down on the upper plate, and at 19 is shown a spring drawing down the lower plate.
Any number of binding-plates may be employed in my device, according to the weight desired to be held. v
To operate the device in the form illustrated in Figs: 1 and 9, where the spindle or shaft is adjustable and supports the weight, the collar is preferably supported on a tubular standard and ma be connected to said standard in any suita 1e manner. The gripplate 8 is set into the collar in which it fits loosely, with one edge resting .on the tongue 4 and the actuating-handle 10 on its 0 0- site side projecting out through the wall of the collar. The hole in this plate is made with a plurality of sides and somewhat larger than the s indle that passes through it. On account 0 sup ortin one edge only of this grip-plate on t e wal of the collar the opposite side naturally falls until the ed es of i the stock around the hole engages bot the back and front of the s indle. Any weight or force exerted by t is spindle to press downward naturally tends on account of the inclined position of the plate to cramp or bind the spindle to prevent it from further downward movement, the principle being that the greater the weight on the spindle the more the grip-plates will cramp and bind the same.
To release the spindle or shaft, it is only necessary to raise the handle 10 by a slight pressure of the thumb or finger, and said s indle may then be moved freely up or own; but upon releasin the handle 10 the sprin 11 acts on the ate and throws it uickiy down into the sliding position to bite t e spindle and hold it firmly from further downward movement, it being always free, however, to be moved in the opposite direction. When it is desired to use the collar on a fixed spindle to support a shelf or plate, as illustrated in Figs. 8 and 10, the grip-plate located therein is held in an inverted osition, the spring being beneath it to ho d it up against the tongue 4, its action being directly opposite touthat illustrated in Figs. 1 and 9., When it is desired to move the collar downward on the spindle, the thumb or finger presses the handle of the said gri plate downward, which naturally releases t e gripping or binding effect on the spindle and the collar may be freely moved in either direction.
This device is extremely simple and practical in its construction and efficient in its operation. On account of the angular shape of the hole a plurality of distinct gri ping and bitin points are resented simu taneously to t e spindle, e ectually binding the same and preventing a further downward movement against a heavy weight. Any number of grippin -plates may be usedin the collar and, as il ustrated in Fig. 3, all of said plates may be actuated with one operating-handle.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is
1. A device of the character described comprising a closed shell or casing the wall of whereby said plate is normally in position to grip said standard,.and a removablecap fitting within said casing and forming a bearing for said shaft.
2. A device of the character described comprising a closed shell or casing the wall of. which is cut to form a tongue, said tongue being bent inwardly, said shell being also provided with. a reduced tubular portion, a gripping-plate located in said casing and provided with a-finger-piece, said plate being provided with a polygonal opening, a standard passing through said casing and also y said plate is noreasing, said cap being provided with a flange forming a bearing for said shaft.
3. V, In alocking collar, a shell, a plurality of gripplates mounted'in said shell, 9. standard extending through said shell and plates, means wherebysaid, plates are held in an inclined position to each grip said standard independently and automatically to prevent an endwise movement of the same in one direc-v tion, and means carried by one plate to si- -multaneously move the other plate when the first-mentioned plate is moved to unlocking ing, means for holding said plates in engagepo'sition.
4. In a locking collar, a shell, a plurality of grip-plates mounted in said shell, a standard extending through said shell and plates, eachof said plates being provided with a polygonal-shaped hole and arranged to present a plurality of distinct gripping-points to said standard, means whereby said plates are held in an inclined position to each grip said standard independently and automatically to prevent an endwise movement of the same in one direction, and means whereby all of the said plates may be moved to unlocking position by the movement of one late. p 5. A device of the character described comprising i shell or casing,;:a; 4' gripping-p ates. located in;-' sai casing, *a standard a passing through said 'plates and said casing-"means for holding said plates'in position-to gripgsaidfstandard, and means in tegral-wi'th one of said. latessand-projecting \from said casing, where y the same may be moved and" means ,for simultaneously releasing all of saidflplatesfrom-,theirgrippin pfsitions by movement of thefir'stmentlone pate. v I i '6. A device of the character described casing being provided with a plurality of inturned lips to form shoulders, a plurality of gripping-plates located in said casing, a
standard passing through said plates and cas- CARL V. J. CHRISTENSEN.
Witnesses: I HOWARD E. BARLOW,
E. I. OGDEN.
comprising a shell or casing, thewall of said