US1504859A - Adjustable secondary rack - Google Patents

Description

W. F. BRADY ADJUSTABLE SECONDARY RACK Aug. 12 1924.

Filed Sept. 22 1923 .Bzaafy B #& ATTORNEX INVENTOR Patented Aug. 12, 1924.

UNITED STATES WILLIAM I. BRADY, OF NEW BRITAIN, CONNECTICUT.

ADJUSTABLE SECONDARY RACK.

Application filed September 22, 1923.

T0 aZZ whom it may concern:

Be it known that I, WILLIAM F. BRADY, a citizen of the United States, and a resident of New Britain, county of Hartford, and State of Connecticut, have invented certain new and useful Improvements in Adjustable Secondary Racks, of which the following is a specification.

This invention relates to secondary racks for electrical power systems, and more particularly to a secondary rack having an adjustable insulator adapted to be moved along the rack to any desired position.

One object of'the invention is to provide a secondary rack of the above nature comprising a U-shaped supporting member in which are mounted an insulator-holding rod and a second rod for reinforcing and strengthening said insulator-holding rod.

A further object is to provide an adjustable insulator especially adapted to be jointly mounted on the supporting rod and the reinforcing rod.

A further object of the invention is to provide a device of the above nature which will be simple, cheap to manufacture, easy to install, compact in size, and very efficient and durable in use.

With these and other objects in view, there have been illustrated on the accompanying drawings several forms in which the invention may be conveniently embodied in practice.

Fig. 1 represents a perspective view, with certain parts shown in section, of one form of the invention in which the secondary rack is provided with a single adjustable insulator.

Fig. 2 is a perspective view of a second form of the invention in which the rack is provided with a pair of adjustable insulators and an intermediate strengthening rod.

Fig. is a perspective view of a third form of the invention in which the rack has a single adjustable insulator and an intermediate strengthening rod, and in which the rack is adapted to be secured to a cross arm, wall, or other surface by a plurality of angle brackets.

Fig. 4 is a perspective view, on a considerably reduced scale, of a pole and cross arms showing a secondary rack of the first form mounted upon a cross arm.

SeriaI No. 664,219.

In electrical power lines for transmitting current from a central station to the points of consumption, it has become customary to employ conductors known as secondary wires to carry current at a voltage of about 2300. In order to prevent arcing and short circuiting between adjacent conductors, which would otherwise be likely to occur on account of the high voltage, it is generally required by statute in most states that the conductors shall be spaced apart by a specified distance. It has been found difficult in practice, however, to always arrange the wires at the specified intervals due to the fact that the racks supporting the wires are usually secured to the cross arm or pole permantently, and said racks have no provision for changing the position of the insulators carried thereon.

By means of the present invention, the above and other disadvantages have been avoided by so constructing the secondary rack as to permit one or more of the insulators to be readily moved along the rack to any desired position.

Referring now to the drawings in which like reference numerals denote correspond ing parts throughout the several views, the first form of the invention shown in Figs. 1 and t comprises a U-shaped supporting member or clevis having a base 10 and a pair of upstanding arms 11 and 12 arranged at right angles to the base. The base 10 is provided near its ends with a pair of elongated slots 13 and 1 1 by means of which it may be secured to a pole, wall, or cross arm, as by bolts and nuts. The arms 11 and 12 are preferably semi-cylindrical at their free ends 15 and 16 and are provided with circular apertures 17 and 18 concentric with said ends for receiving an insulator supporting rod 19 which preferably extends for a short distance beyond the arms 11 and 12 for a purpose to be hereinafter described.

The supporting rod 19 is threaded preferably though not necessarily throughout its length, as clearly shown in Fig. 1, and is provided at its opposite ends with a wing head 20 and an aperture 21 respectivelythe aperture 21 being adapted to receive a cotter pin 22. Between the arms 11 and 12 is mounted an adjustable hollow insulator spool 23 of any usual construction, said spool being secured in position at any desired point on the supporting rod by means of two pairs of nuts 24 and 25 located at either side of said spool. On the ends of the supporting rod beyond the arms 11 and 12 a pair of fixed insulator spools 26 and 27 are provided, said spools being identical in all respects with the spool 23. Washers 28 and 29 are provided outside of said spools 26 and 27, and a locking nut 29 is mounted between the washer 28 and the cotter pin 22.

Fig. 2 illustrates a second form of the in vention in which the rack has a U-shaped supporting member 30 similar to the U-shaped member 10 of the first form of rack. In this instance, however, the slots in the base of the supporting member have been omitted. The base of the supporting member 30 is adapted to be secured to a pole, wall, or cross arm by means of a pair of transverse clamping strips 31 and Each of the strips 31 and 32 is arched to fit over the base of the support with its extremities flush therewith, and said strips are secured to said base and the pole, wall or cross arm, in any suitable manner as by means of screws, not shown, passing through screw holes 33 and 34. The upstanding arms of the support 30 are designated by the nu merals 35 and 36 and are provided with apertures 37 and 38 near the top and bottom of said arms respectively. The top apertures 37 are preferably tapped to en gage a threaded supporting rod 39, as clear- 1y shown in Fig. 2. The bottom apertures 38 are square in shape to receive the square intermediate rod 40 which is provided between the supporting rod 39 and the base to increase the rigidity of the rack and to reinforce and strengthen the supporting rod 39. The rod 39 is provided with a wing head 41 on one end and is locked in position by a nut 42 and a cotter pin 3 at the other end thereof. The square intermediate rod 40 is similarly provided atone end with a square head 4A and is locked in place by a nut 45 and a cotter pin 16 at its other end. i

In the embodiment of the invention illustrated in Fig. 2, the rack is provided between the arms of the supporting member 30 with a pair of insulator spools 17 and 48, said spools being preferably though not necessarily threaded on their interior to engage the threads of the rod 39. The lefthand spool 47, as viewed in Fig. 2, is held in place between a pair of depending strips 49 and 50 by two sets of locking nuts 51 and 52 respectively, the lower ends of the strips 19 and 50 being provided with square holes 53 and 54 adapted to fit upon the intermediate reinforcing rod 1O. The righthand spool 48 is located within a clevis 55 having its arms 56 and 57 in contact with the end faces thereof. The arms 56 and 57 are also provided with square holes to fit over the square rod 40. Two pairs of locking nuts 58 and 59 are provided, as with the left hand spool, to hold the spool 18 in any desired adjusted position. It will thus be seen that the insulator spools 4:9 and 50 are not only supported against horizontal stresses, but are strongly reinforced against downward stresses by means of the intermediate rod 10.

A still further modified form of the invention is illustrated in Fig. 3. In this form of rack, the U-shaped supporting member is omitted and the rack is secured in place upon the pole, wall, or cross arm by means of three angle- shaped brackets 60, 61, 62, the upstanding arms of which are provided with apertures 63 and 64?, to receive a threaded upper rod 65 and a smooth lower rod 66 respectively. The threaded upper rod 65 is provided outside of the bracket with a head 67, and is locked in place by means of a nut 68 and a cotter pin 69 outside of the bracket 62. The smooth lower rod 66 is similarly provided outside the bracket 60 with a wing head 70, and is similarly locked in place at its other end by a nut 71 and cotter pin 72. The brackets 60 and 61 are of uniform width throughout and are provided at their base portions with screw holes 73 and 74 respectively, said screw holes being adapted to receive the extremities of a U-shaped clamping rod 75 which is employed when the device is to be secured upon a cross arm 76. \Vhen it is desired to attach the rack to a wall or pole, all three of the angle brackets will be employed. In this case the bases of the brackets will be secured to the surface of the wall or pole in any suitable manner as by screws, not shown. As will be clear from the drawing, the angle bracket 61 is slidable along the rods and 66 so that various sizes of U-shaped clamps and cross arms may be accommodated.

In the third form of secondary rack, provision is made of a special type of insulator comprising a pair of approximately rectangular grooved end sections 77 and 78 which are joined by a rectangular central section 79 as clearly shown in Fig. 3. This form of insulator is also provided with a pair of longitudinal spaced apertures for re ceiving the rods 65 and 66. The insulator is also provided with a somewhat larger central transverse aperture 82 for receiving an vention is not to be limited to the specific disclosures, but may be modified and embodied in various other forms without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claim.

Having thus fully described the invention, what is claimed as new, and for which it is desired to secure Letters Patent, is:

In a secondary rack, a U-shaped support ing member having a base and a pair of upstanding arms, a pair of cross rods mounted in said arms, a plurality of insulators mounted on one of said rods, and means rigidly connecting said rods at a point between said arms for reinforcing the rod carrying said insulators, and means for locking said insulators in any desired position.

In testimony whereof, I have afliXed my signature to this specification.

WILLIAM P. BRADY.

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