Патент USA US2068528код для вставки
Jan. 19, 1937. '- ‘I c. R. ANDERSON Y - ADJUSTABLE GROUND RAIL CONNEGTER 2,063,523 ' ' ' Filed Oct.‘ 15, 1935 ‘ ‘ 24 / 25 ‘ dafl % INVENTOR 2,068,528 Patented Jan. 19, 1937 UNITED STATES PATENT OFFICE 2,068,528 ADJUSTABLE GROUND RAIL CONNECTER Cecil It. Anderson, Ben Avon, Pa, assignor to The Martin-Hardsocg Company, Pittsburgh, Pa., a corporation of Pennsylvania Application October 15, 1935, Serial No. 45,095 8 Claims. (Cl. 173-273) This invention pertains to electrical connecters and, more particularly, to an electrical connecter for use in making a connection to a rail for the ground side of a circuit. Connecters of the type to which the present 5 invention relates are largely used in mines where certain parts of the main track system are elec tri?ed, but where the tracks immediately ad jacent the working faces of the rooms are not 10' electri?ed. The mining machines, which are mobile, are electrically driven. They are pro vided with an electric cable. One wire in this cable is provided with a connecter adapted to en gage the trolley side of the electri?ed track cir ' cuit and the other wire of the cable is clamped to one of the rails of the electri?ed track circuit. Figure 4 is a perspective view of the slide mem ber in which the movable contact jaw is mounted; Figure 5 represents a transverse section in the‘ plane of line V—-V of Figure 1; and Figure 6 is a view partly in elevation and partly in section of a modi?ed arrangement. Referring to the drawing, 2 designates a body member of conducting material, preferably cop per, this body member being in the form of an elongated bar having a fixed claw 3 at its outer 10 end. The claw member 3 is bent over at an acute angle so as to provide a tapering space be tween the underside of the claw on the top of the body 2 to receive one ?ange of a rail, as clearly shown in Figure 1. In Figure 1, the out 15 line of a rail is indicated in dotted lines, and tion to the rail have been such that good con the manner in which the sloping ?ange of the rail is engaged under the claw 3 is clearly indi tact with the rails is not at all times secured, cated. Heretofore clamps provided for making connec , resulting in the irregular operation ofthe min ing machine and unnecessary heating of the mo tors. Moreover, the use of such clamps as have heretofore been provided has been attended with considerable inconvenience. Clamps of this type are also used in other places where one side of a circuit has to be connected to a rail of an electric track system, the use not being con?ned entirely to mines and mining machinery. According to the present invention, there is provided an adjustable clamping connecter of simple construction which can be easily operated Mounted on the bar or body 2 and slidable 20 therealong is a slide member 4, this member hav ing an undercut guideway 5 therein to receive and engage the bar 2 and having upstanding side ?anges 6. This slide member has a forwardly projecting extension or lip portion 1. : 25 Pivotally supported between side member 6 of the slide is a jaw member 8 having a forwardly extending rail ?ange engaging portion 8a and having a rearwardly projecting lip portion 9. It will be noted that the under surface of the jaw 30 and which is adaptable for rails over a wide range portion 8a is tapered. This taper allows the jaw to accommodate itself to rails of different sizes, of sizes. running from 25-110. to 50-lb. rails and even The invention contemplates the pro vision of a body member having a claw for en gagement with one ?ange of a rail and having a slide member movable therealong having a rail-clamping element supported therein with an actuating means _for the rail-clamping ele ment, the arrangement being such that when one ?ange of the rail is engaged by the ?xed claw, the slide member may be moved toward the other ?ange, and when engaged with the other ?ange moved into clamping engagement therewith and at the same time the sliding member be clamped against free movement along the body on which it is carried. I The invention may be readily understood by reference to the accompanying drawing, in which Figure 1 represents a side elevation of a grounding clamp connecter embodying my in vention; Figure 2 is a top plan view of the connecter shown in Figure 1; Figure 3 is a perspective view of the movable 55 contact jaw; ' heavier. It is, of course, important that there be good contact with the rail over a relatively large surface whether the rail be a small rail or a large one. The pivoted jaw member 8 also has a rearwardly extending lug IE1 spaced below the rearwardly projecting extension 9. A pin ll serves to provide the pivotal support for the 40 member 8. The jaw member has a slightly curved bottom surface to which may, but which does not necessarily, rest on the top of the bar 2. Pivotally supported in the slide member to the rear of the jaw 8 is an actuating member desig 45 nated generally as l2. This actuating member has a cam portion [3 which engages under the lip or extension 9 on the jaw, and has a nose portion I4 positioned over the lug ill. The member I2 is provided with an operating handle l5 having 50 an insulating sleeve 15 thereon. The member I2 is pivotally supportedvby means of a pin [1. Bolted to the bar 2 is a lateral extension or connecter member it! having a clamp I9 thereon with a bolt 20 for adjusting the clamp, this clamp 55 2 2,068,528 a pin 3| between side members 26 is the operat ing member designated generally as 32 and hav ing an insulated handle 33. The operating member has a forwardly extending portion 34 with gear teeth 35 arranged to cooperate with the gear teeth 30. When the handle 33 is pressed being for engaging the terminal of the cable 2| leading to the mining machine or other machine to be connected with the rail. The bar 2 has a rearwardly extending portion back of the connec ter designated 22, the extension 22 being covered with an insulating sleeve 23. This forms a han It will be noted that the portion 8a. of the jaw down, the motion transmitted through the gear teeth to the jaw member 2‘! is such as to cause is of a width greater than the width between the the lip 21a to be forced down against the ?ange 10 two upstanding ?anges 6-6 so as to afford an of the rail, whereas movement of the handle in the opposite direction causes the jaw member to be lifted out of engagement with the ?ange of the rail. It will be seen in this arrangement as in the arrangement previously described, that the motion of the handle is positively transmitted to the clamping element and that the clamping element acts directly against the ?ange of the rail, no local pressure being exerted at any point against the body 24. In either of the forms of die for the connecter unit. increased area of contact with the rail ?ange. It will also be noted that this part of the jaw member overhangs the forwardly projecting lip 15 or extension 7 on the slide 5. In the use of the device the cable 2| is ?rmly attached to the clamp |8—|9 so as to make a substantially permanent connection. The con necter is then hooked onto the track rail by bringing the overhanging claw 3 against one 20 ?ange of the rail and pulling it up tightly against devices just described, the arrangement is such the rail. The operator, holding handle |5—I6 in the position shown in Fig. 1 then slides the slide that when the operator grasps the handle IE5 or 33 to move the clamping element toward the forwardly as far as it will go to engage the other ?ange of the rail. Downward pressure is then ?ange of the rail the jaw is opened, thus facili tating the application of the connecter to the rail. Likewise, in either form, the application 25 25 applied to the handle |5--|6, and the movement of downward pressure on the handle forces the of the cam !3 under the overhanging lip 9 causes the jaw to be rocked in such manner that the lip jaw into rail-clamping position. portion 8a thereof is pressed ?rmly against the ?ange of the rail. Upon release of pressure from the handle |5—|6, the member remains clamped the device provides a very simple and eifective clamp which can be used with rails of a wide variety of sizes and wherein contact with rela 30 tively wide surfaces of the rail is assured, so that to the rail. When it is desired to release the Either form of clamp, the handle |5-|5 is lifted up, relieving even though the rail might be slightly rusty, the pressure from the under surface of the rear nevertheless, a good connection will be made. While I have shown and described certain pre ferred embodiments of my invention, it will be 85 understood that various changes and modi?ca ward extension 9. Further continued upward 35 movement of the handle causes the nose I4 to press down against the lug iii, exerting a lift ing movement to the jaw, so that the portion 8a will be forced out of contact with the ?ange of the rail. The slide can then be easily retracted and the connecter released from engagement with the rail. - The device does not require the use of any springs and the clamping pressure exerted by the jaw is always exerted against the ?ange of the 45 rail, tending to pull the slide member 4 against the bottom of the bar 2. There are no contact points where the pressure is localized against the bar 2, so that the bar 2, if it be made of copper or other relatively soft conducting material, is 50 not dented or mutilated in the operation of clamping the connecter to the rail. The arrangement shown in Figure 6 shows a generally similar device but wherein the jaw member is provided with gear teeth to engage 55 corresponding gear teeth on the operating mem ber. In this ?gure 24 designates a body mem ber in all respects similar to the body member 2 previously described and, therefore, only a small portion of the body member 24 is shown in Fig ure 6. 25 designates a slide member movable along the bar or body 24 and constructed simi larly to the slide member Al shown in Figure 4. This slide member 25 has upwardly extending side members 26 similar to the side members 6 of 65 the member shown in Figure 4. The jaw 2'? is generally similar to the jaw member 8 of Figure 3, having a forwardly extending lip portion for en gagement with the ?ange of the rail, this lip por tion being designated 21a and being widened outin 70 the same manner that the jaw member previously described is widened. It has a portion 28 disposed between the two side plates 26 through which the pivot pin 29 passes, and rearwardly of the pivot pin the portion 28 is provided with an arcuately 75 disposed series of gear teeth 30. Supported on tions may be made within the contemplation of my invention and under the scope of the follow ing claims. 40 I claim: 1. A ground rail connecter clamp comprising a bar-like body member having a rail ?ange en gaging claw at one end thereof, a slide member having a guideway therein in which guideway the bar-like body member is received and in 45 which said body member has a sliding ?t, and. an adjustable jaw element on the slide member mounted for movement about a ?xed point on the slide and movable vertically into and out of clamping engagement with the ?ange of a rail 50 engaged by the connecter. 2. A ground rail connecter clamp comprising a bar-like body member having a rail ?ange en gaging claw at one end thereof, a slide member on the body member, said slide member having 55 a guideway therethrough to receive the body member, said slide member having upstanding side portions, a movable jaw member pivotally supported between said upstanding side portions, and operating means for said jaw. 3. A ground rail connecter clamp comprising a bar-like body member having a rail ?ange en gaging claw at one end thereof, a slide member mounted on the body member for movement lon gitudinally thereof, a rail ?ange engaging jaw 65 member pivotally supported on the slide mem her, and operating means for the jaw pivotally mounted on the slide member. 4. A ground rail connecter clamp comprising a bar-like body member having a rail ?ange en 70 gaging claw at one end thereof, a slide member mounted on the body member for movement lon gitudinally thereof, a rail ?ange engaging jaw member pivotally supported on the slide member and having a rearwardly extending operating 75 2,068,528 extension, and an operating member pivotally supported in the slide member having motion transmitting means thereon cooperating with the rearwardly extending portion of the jaw member for transmitting motion thereto. 5. A ground rail connecter clamp comprising a bar-like body member having a rail ?ange en gaging claw at one end thereof, a slide member mounted on the body member for movement 3 7. A ground rail connecter clamp comprising a bar-like body member having a rail ?ange engag ing claw at one end thereof, a slide member mov able along the body member and having a sliding ?t thereon, a movable jaw member on the slide member movable vertically into and out of en gagement with the ?ange of a rail to be engaged by the clamp, operating means on the slide mem ber, and means operatively connecting the operat longitudinally thereof, a rail ?ange engaging _ ing means and the jaw for positively transmitting 1O jaw member pivotally supported on the slide motion in two directions from the handle mem ber to the jaw member. member and having a rearwardly extending por 8. A ground rail connecter clamp comprising a tion with projections thereon, an operating han dle pivotally supported on the slide member, said bar-like body member having a rail ?ange en 15 operating handle having a forwardly extending gaging claw at one end thereof, a slide member portion with projections thereon inter?tting with movable along the body member and having a sliding ?t thereon, a movable jaw member on the the projections on the rearwardly extending por tion of the jaw whereby movement of the handle slide member movable vertically into and out of downwardly causes a downward movement of 20 the jaw and an upward movement of the handle effects an upward movement of the jaw. 6. A ground rail connecter clamp comprising a bar-like body member, having a rail flange en gaging claw at one end thereof, a slide member movable along the body member, an operating handle pivotally supported on the sliding member, a rail ?ange engaging jaw member also pivotally supported on the slide member, and cooperating means on the handle member and jaw member 30 for transmitting motion from the handle member to the jaw member. engagement with the ?ange of a rail to be en gaged by the clamp, operating means on the 20 slide member, and means operatively connecting the operating means and the jaw for positively transmitting motion in two directions from the handle member to the jaw member, said last named means including a cam on the handle member cooperating with the cam-engaging sur face on the jaw member, the cam being movable to an over-center position whereby pressure on the jaw will not e?ect movement of the handle member. CECIL R. ANDERSON.