US 2742806 A
Description (OCR text may contain errors)
April 24, 1955 J. PAVELKA CONNECTOR BOLT APPLYING TOOL 2 Sheets-Sheet 1 Filed Jan. 8, 1955 INVENTOR. n @WM A41.: `1 N l April 24, 1956 J. PAVELKA 2,742,806
CONNECTOR BOLT APPLYING TooL Filed Jan. 8, 1953 2 Sheets-Sheet 2 United States Patent vO CONNECTOR BOLT APPLYING TOOL Joseph Pavelka, St. Louis, Mo., assignor to Joseph Pavelka, Jr., St. Louis, Mo.
Application January 8, 1953, Serial No. 330,241
24 Claims. (Cl. 81-53.1)
The invention relates to a tool for making a connection to an electric power line by means of a connector bolt having a split shank, adapted to straddle the power line and a lead off wire, and an associated nut arranged to be threaded onto the bolt shank for clamping the line and lead ofr wire together.
The main object of the invention is to facilitate the application of the lead olf wire and connector bolt to the power line without the necessity of the workman taking direct hold of the power line.
Another object is to provide for the application of the lead E wire and connector bolt to the power line when they are at an elevation beyond the reach of the operators hands. l
Another object is to facilitate the tightening of a connector bolt as described without applying a bending moment to the power line.
Another object is to eiect the application of a connector to an overhead power wire by the manual manipulation of a single elongated shaft on which the remainder of the tool is carried.
The tool is used most effectively with a connector bolt and nut unit, as shown, which include elements forholding the lead oil' wire assembled with the nut independently of the tool. Such a bolt and nut assembly is described and claimed separately in another application filed by the present inventor February 9, 1953, Serial No. 335,810 now Patent 2,731,616, issued January 17, 1956.
1n the accompanying drawings illustrating preferred embodiments of the invention:
Figure 1 is a front elevation looking into open jaws of a tool of the type described with the parts in the position assumed when the tool is rst applied to the power line and before the tap wire and connector bolt nut are brought together with the power line and the connector bolt.
Figure 2 is a side elevation of the structure shown in Figure 1.
Figure 3 is drawn to an enlarged scale and comprises a vertical section taken approximately on the line 3-3 of Figure 1 and showing the two parts in another position occupied when the power line and lead olf wire and connector bolt nut are assembled with the bolt.
Figure 4 is a detailed vertical section taken on the line 4 4 of Figure 3. v
Figure 5 is a horizontal section taken on the line 5--5 of Figure 2.
Figure 6 is a horizontal section taken on the line 6-6 of Figure 2.
Figure 7 is a horizontal section taken on the line 7-7 of Figure 2.
FigureS is a horizontal section taken on the line 8-8 of Figure 2.
Figure 9 shows the lower portion of the tool head as in Figure 2 but mounted on a different type of elongated support and operating shaft.
Figure 10 is a horizontal transverse section taken on the line 10-10 of Figure 9.
2,742,806 Patented Apr. 24, 1956 Figure 11 shows the tool head as in Figures 1-3 but mounted on a pair of elongated shafts extending downwardly from the head.
The tool frame includes a bottom wall 1, upwardly extending side walls 2, there being a rear wall 3 extending between the upper portions of side walls 2. A rear upper shelf 4 extends forwardly from the upper end of rear wall 3 and between side walls 2. A forward lower shelf 5 extends between side walls 2 intermediate the upper and lower ends of the frame.
A vertical shaft 6 is slidable axially in bottom wall 1 and is shouldered at 7 to seat a larger diameter tube 8 fixed on the shaft. The upper end of tube 8 mounts a detachable, upwardly open socket 9 which receives the hexagonal nut N of a connector bolt B. A collar 1) is slidable on shaft 6 between frame side walls 2. A relatively strong coil spring 11, surrounding shaft 6 and received within tube 8, is seated on collar 10 and engages shoulder 7 to exert an upward thrust on shaft 6. A relatively weak coil spring 12 surrounds tube 8 and is seated on the underface of shelf 5 and engages a ange 8a on the lower end of tube 8 to exert a down* ward thrust on the latter and shaft 6.
Slidably, but non-rotatably, mounted in bottom wall 1 and shelf 4 is a bar 13, the upper end which carries a head 14 detachably ailxed to the bar by a screw 15 and including a horizontal guide 16. Two slides 17, 17 arranged end to end are mounted on guide 16 and re connected to eachother by toggle links 18. A toggle 'lever 19 is pivoted to the head at 20 and to links 18 at 21. Each slide 1'7 is provided with a jaw 22. Coil springs 23 thrust slides 17 Vand their jaws 22 toward each other to grip the head of a connector boltB inserted between the jaws. A set screw 24 controls the thrust of jaws 22 against the bolt head.
'If lever19 is shifted downwardly manually it moves the common pivot 21 across a straight line between pivots 18a to lock the toggle with slides 17 spaced apart against the thrust of springs 23. v
A stud 25 is seated in frame side walls 2 and journals a pair of sheaves 26 adjacent walls 2 and partially receiving bar 13 between them.` A cable 27 rides over each sheave 25 and has one end anchored to collar 10 and its other end anchored to bar' 13.
' At the lower end of bar 131s -a horizontal arm 30, the outer end of which slidably and rotatably receives the lower end of a sleeve 31 splined onto shaft 6 and including a bushing 31a between the upper face of arm 30 and the lower face of frame bottom wall 1. A horizontally extending handle 32 is lixed on arm 30. A horizontally 'extending crank arm 33, provided with a handle 34, is secured to the lower end of sleeve 31.
A heavy coil tension spring 431s secured to bar 13 at 44 and to the vframe top wall at 45 and yieldingly raises the bar 13 'tothe position shown inrFigures l and 2 in which-arm 3G thrusts bushing 31a against frame bottom wall 1. j
Operation: In utilizingV the tool to apply a lead off wire T to a power line L, toggle lever 19 is swung do'wrr# wardly to separate jaws 22, and the head of bolt B is placed between the jaws, and the toggle released.
Bolt nut N is applied to holder 9 and preferably includes i line in the hook-like recesses 50 in the upper endsl-of walls 2. This is readily accomplished without engagingY theb'olt'which is only frictionally clamped between jaws 17l and couldbe-easily-twistcdor displaced if it were" at= tempted to first insert the power line between the bolt legs. Initially, the bolt is well above the hook and does not contact' the line unti1 after'tlie tool frame hook is seated on the-line, as shown` in` Figure 2. Subsequently, a downward pull on bar 13, either direct throughliandle 32 or indirectly through crank arm 33', sleeve 31, bushing 31a and* arm 30; lowers bolt B into a position in which it straddles thepower line L (Figure 3) and causes cables 27"tolift collar10; spring 11, shaft 6, nut N and lead off wire T relative to power line L until nut N contacts the lower end of'bo'ltiB; This limits free upward'axialmovement of shaft 6 in the frame; Shaft 6 may then be rotatedclockwise` bycrank'arm 33 and sleeve 31 to thread the'nut onto'the bolt and feed nut N and'wire T and line L upthe bolt slot untilL the wire and line are tightly clamped between the bolt head and nut. At this time downwardpull on handle 32 or sleeve 31, or both, may be discontinued and springs' 43 and'11 will raise bar 13 and' lower shaft 6, freeing the bolt head from the frictional grip of jaWs22 and freeing nut' N from holder 9. The to'ol hangs loosely on line L and is readily removed from the line by relative upward' and transverse movement of the tool by sleeve 31 or by handle 32 or both without alecting the bolt or nut holder.
Handle 32 serves as a crank arm by which the tool head may be held manually against a tendency to twist and bend the power line by rotation of shaft 6 as nut N is tightened.
Bar 13 and shaft 6,. with sleeve 31, may be of any length necessary to elevate the tool to a given height above the workman and to operate the tool as described above. However, the toolmay be operated effectively by the downward extension of sleeve 31 only, as indicated in Figures 9 and 10, in which the lower end of sleeve 31 may be shouldered at 50 and supported manually by a hollow handle 51 rotatably receiving the reduced diameter terminal 52 of the sleeve. The lower end of the sleeve will have a crank arm 53 and a handle 54 corresponding to crank arm 33 and handle 34 in Figures 1 and 2. Handle 32 on bar 30 may be omitted or may be retained for possible use in preventing manually twisting of the tool head if the handle is within reach or for use in another operation where the power line is at a lower level.
Figure 11 shows another form of the invention in which the lower end portions 6a and 13a of shaft 6 and bar 13 have no direct association with each other and downward or upward movement of shaft 6 will not shift bar t that other details of the construction may be` varied substantially without departing from the spirit of the invention and the exclusive use of those modifications coming within the scope of the claims is contemplated.
What is claimed is:
l. In a tool for applying a bolt and nut to a power line, a frame recessed to form a line receiving hook, a bolt holder and support slidably mounted on the frame to move towards and away from said hook, a nut holder and support slidably mounted on the frame to move towards and away from the hook, an elongated upright bar yieldingly connected to the frame to support the same but movable lengthwise relative thereto when the frame is supported as by a power line, an operative handle connected to the bar, and means actuated by relative movement of said bar and frame for moving said bolt holder and nut holder both relative to the frame and hook and towards each other.
2. A tool structure as described in claim 1 in which thenut holder is rotatable about the axis of the bolt holder.
3. A tool structure as described in claim l in which the nut'holder'is rotatable about the axis ofthe bolt holder, and the bar includes a lateral extension which may be swung in a plane normal to the axis of the nut holder to provide a crank arm for holding the bar and frame and hook against rotation of the nut holder about the axis of the bolt holder.
4. A tool structure as described in claim l in which the holder moving means comprises a flexible cable with its ends connected to the bar and nut holder, support respectively and passes over a sheave journaled on the frame so that vertical movement of either holder results in simultaneous movement oftheother holder.
5. In a tool for applyinga bolt toapower line, a frame having a downwardly opening recess arranged to hook over the line, a bolt holder mounted to move vertically on the frame, and spring means yieldingly supporting the bolt holder on the fr arne in a position spaced abovethe upper end ofsaid recess.
6l In a toolfor applyinga bolt to a power line, a frame havingV av downwardly opening recess arranged to hook over the. line, a bolt holderY mounted to move vertically on the frame, spring meansyieldingly supporting the bolt holder on the frame in a position spaced above the upper end: of saidrecess, and a, nut holder mounted to move vertically on the frame below said recess, said holders being movable towards each other by bodily movement ofthe boltholder downwardly relative to the frame.
7. A tool4 structure as. described in claim 6 which includes spring means yieldingly positioning the nut holder vertically of the frame.
8. ln a tool for applying a bolt to a power line,.a frame having. a downwardly opening recess arranged to hook over the line, a holder movably mounted on the frame to position, aboltabovesaid recess, spring means yieldingly supporting the boltholder on the frame in said position, a nut holden mountedon the frame below said recess, said holders being movable towards each other by downward movement of the bolt holder relative tothe frame, and means, for manually rotating said nut holder relative to said bolt holder.
9. In a tool for applying a bolt and nut to a power line, a frame having a downwardly and laterally opening recess arranged to receive at power line, amember slidable vertically in; said frame and provided with a bolt holder normally above and in substantial vertical alignment with said recess, a nut-holding member slidable vertically in said frame and normally below and in substantial vertical alignment with said recess, a sheave having a horizontal axis. andjournaled4 in said frame, and a cable supported intermediate itsL ends on said. sheave and having its ends connected, respectively, to said members.
l0. A tool structure as described in claim 9 which includes spring` means yieldingly thrusting the bolt holding member upwardly of the frame.
ll. A tool structure as described in claim. 9 which includes spring means. yieldingly thrusting the bolt holding member upwardly of, the frame, the frame and the` bolt holding member having vertically opposing elements limiting relative movement of the member upwardly in the frame by said spring means.
l2. A tool as described in claim 9 which includes spring means yieldingly thrusting the bolt holding member upwardly of the frame, and spring means yieldingly thrusting. the nut holding member downwardly in the frame.
13. A tool asl described'inclaim 9 in which the nut holding member is rotatable in the frame axially of the member and the bolt holding member is held against such rotation.
14. A tnol structure as described in claim 9 which includes a spring associated with the frame. and the bolt holder member and thrusting the latterr upwardly of the frame, a spring associated with the frame and nut holder member and thrusting the latter downwardly of the frame,
and a stronger spring associated with the cable and nut holder and thrusting the latter upwardly of the cable connection to the nut holder member.
15. In a tool for applying a bolt and nut to a power line, a frame having a downwardly and laterally opening recess arranged to receive a power line, a member slidable vertically in said frame and having a bolt holder, an upright shaft rotatable and slidable axially in said frame, a collar surrounding said shaft and slidable vertically in said frame, a sheave having a horizontal axis and journaled in said frame above said collar, a cable overlying said sheave with the ends secured to said frame and to said collar respectively, and a yielding support for said shaft on said collar.
16. A tool structure as described in claim l5 in which the yielding support for the shaft on the collar includes a relatively strong spring thrusting the shaft upwardly of the collar and a relatively weak spring thrusting the shaft downwardly of the frame.
17. A tool structure as described in claim in which the shaft has a lateral shoulder, and a relatively strong spring is compressed between the collar and the lower face of the'shoulder, and a relatively weak spring is cornpressed between the frame and the upper face of the shoulder.
18. In a tool for applying a bolt and nut to a power line, a bolt holding stnlcture comprising a guide, a pair of jaws slidable along the guide towards and from each other, spring means thrusting the jaws together, and a manually operable toggle controlling the spring actuated jaws and comprising individual links, each pivoted at one end to a respective jaw, and a lever pivoted at one end to the guide and having a common pivot intermediate its ends to the other ends of said links.
19. In a tool for applying a bolt and nut to a power line, a bolt holding structure including a horizontally elongated guide, members slidable longitudinally of the guide to and from each other and having jaws depending from the guide and disposed to clamp a bolt head between them, an individual spring associated with each member and compressed between the member and the guide and thrusting the member towards the other member, an upstanding ear on each member, and a toggle control for said members and springs including individual links associated with the members, each pivoted at one end to a corresponding ear and extending generally towards the other ear, a common pivot interconnecting the other ends of said links, a control lever fulcrumed at one end on the guide at about the level of said ears and pivoted between its ends to said common pivot and shiftable to move said common pivot across the straight line between said first-mentioned pivots to hold said members spaced apart against the thrust of said springs.
20. In a tool for applying a connector bolt to a power line, a frame having a downwardly opening recess disposed to hook over the line, an elongated member slidable vertically in said frame and provided with a bolt holder at its upper end, an elongated rotatable upright shaft slidable vertically in said frame alongside said member, a nut holder below said bolt holder and mounted on said shaft, and means interconnecting said member and nut holder for moving said nut holder upwardly in said frame as said member moves downwardly in said frame.
21. In a tool for applying a connector bolt to a power line, a frame having a downwardly opening recess disposed to hook over the line, an elongated member slidable vertically in said frame and provided with a bolt holder at its upper end, an elongated rotatable shaft slidable vertically in said frame alongside said member, a nut holder below said bolt holder and mounted on said shaft, means interconnecting said member and nut holder for moving said nut holder upwardly in said frame as said member. moves downwardly in said frame, a handle on the lower end of said member for manually moving it downwardly in said frame, and a crank connected to said shaft to manually rotate it in said frame.
22. In a tool for applying a connector bolt to a power line, a frame having a downwardly opening recess disposed to hook over the line, an elongated member slidable vertically in said frame and provided with a bolt holder at its upper end, an elongated rotatable shaft slidable vertically in said frame alongside said member, a nut holder below said bolt holder and mounted on said shaft, means interconnecting said member and nut holder for moving said nut holder upwardly in said frame as said member moves downwardly in said frame, a sleeve slidable lengthwise but non-rotatable on said shaft and provided with means at its lower end for manually rotating the sleeve and said shaft, there being a downwardly facing shoulder on said sleeve and an opposing upwardly facing shoulder on said elongated member whereby said sleeve may be actuated to lower said elongated member in said frame.
23. In a tool for applying a connector bolt and nut to a power line, a frame having a laterally and downwardly opening hook for receiving and resting upon the power line, a downwardly facing bolt holder movable vertically onV said' frame and positioned above the level of said hook, an upwardly facing nut holder movable vertically on said frame and positioned below said hook, spring structure thrusting said holders upwardly of the frame, said holders and spring structure being constructed and arranged to hold a bolt and nut, respectively, spaced apart above and below said hook and with their axes aligned, and elongated handle structure extending downwardly from said holders for moving said holders towards each other and relative to said frame, against the thrust of said spring structure, when said frame is supported on the power line.
24. In a tool for applying a connector bolt and nut to a power line, a frame having a laterally and downwardly opening hook for receiving and resting upon the power line, a downwardly facing bolt holder movable vertically on said frame and positioned above the level of said hook, an upwardly facing nut holder movable vertically on said frame and positioned below said hook, individual yielding devices thrusting said holders upwardly of the frame, said holders being constructed and arranged to hold a bolt and nut, respectively, spaced apart above and below said hook and with their vaxes aligned, and individual elongated handles extending downwardly from said holders for moving them simultaneously against the thrust of said devices when said frame is supported ou the power line.
References Cited in the le of this patent UNITED STATES PATENTS 2,002,981 Halladay May 2S, 1935 2,220,314 Blackburn Nov. 5, 1940 2,505,186 Hubbard Apr. 25, 1950