US3845804A

US3845804A - Traction gate with camming bar

Info

Publication number: US3845804A
Application number: US00385048A
Authority: US
Inventors: F Romberg
Original assignee: Individual
Current assignee: Individual
Priority date: 1973-08-02
Filing date: 1973-08-02
Publication date: 1974-11-05
Anticipated expiration: 1991-11-05
Also published as: CA1016379A

Abstract

In a traction gate, a wire barrier comprises a plurality of normally horizontally disposed lengths of barbed wire each pivotally connected at one end to a first gate post and each extending to a normally vertically disposed standard. The bottom of the standard is secured to a second gate post by means of a forked portion depending from the standard and a cooperating Tbolt on the post. The upper part of the standard is provided with a roller which engages a camming bar curving outwardly from the second gate post to apply tension to the gate with gradually increasing mechanical advantage as the gate is closed. During the closing operation the mid-portion of the standard is received in a hook-shaped member mounted on the post which prevents bending of the standard from additional tension in the wires when generated by livestock engaging the gate.

Description

United States Patent 11 1 Romberg Nov. 5, 11974 TRACTIQN GATE WITH CAMMING BAR Primary Examiner-W. C. Reynolds [76] lnventor: Felix B. Romberg, PO. Box 218, Assistant Examiner-Philip Karma Holland, 75218 Attorney, Agent, or FirmRichards, Harris &

Medlock [22] Filed: Aug. 2, 11973 [2]] App], No.: 385,040 [57] ABSTRACT In a traction gate, a wire barrier comprises a plurality [52] U.S. Cl. 160/328, 49/34 of normally horizontally disposed lengths of barbed [51] Int. Cl. E05c 5/00, EOlf 13/00 wire each pivotally connected at one end to a first Field Of Search gate post and each extending to a. normally vertically DIG. 71 disposed standard. The bottom of the standard is secured to a second gate post by means of a forked por- [56] References Cited tion depending from the standard and a cooperating UNITED STATES PATENTS T-bolt on the post. The upper part of the standard is 1,245,554 11 1917 Bell 292/238 Provided with a roller which engages Cumming 2,109,300 2/1938 Mortensen 160/328 curving outwardly from the Second gate P to pp 2,698,197 12/1954 Jacobson 292 1310. 71 ux tension to the g with gradually increasing mechani- 2,747,910 5/1956 Salmon 160/328 X cal advantage as the gate is closed guring the clo sing 2,768,456 /1956 operation the mid-portion of the standard is received 3,091.045 5/1963 in a hook-shaped member mounted on the post which 3,327,998 6/1967 Wycofl: 160/328 X revents bending of the standard from additional ten 3165mm 3/1972 Odend ha} et 292/1310 71 X sion in the wires when generated by livestock engaging the gate.

18 Claims, 10 Drawing Figures 4 20 1111 F i 22 :l 88 28 15 106 9a 5 a4 1 i 86 K 3 950 24 1 4 P 1 1 L, I a a a a 24 14 34 36 a 2 J 3 24 F 174 3 34/36 I} 120% 5 1 0 24 2 4 lh-44 *1 S4ZZE-V;::IT:L A

l a 24 a 44 34 36 is 570 L 40 24 a j MMHH 2 34 36 3a l TRACTION GATE WITH CAMMING BAR BACKGROUND AND SUMMARY OF THE INVENTION This invention relates generally to traction gates, and more particularly to an improvement in traction gates whereby a camming bar is utilized to apply tension as the gate is closed.

It is common practice on farms and ranches to utilize simple wire gates (also known as gaps). Gates of this type usually comprise a barbed wire barrier strung between vertical standards which are in turn supported by spaced gate posts. In many instances no means with mechanical advantage is provided for exerting traction on such a gate. Instead, the operator simply positions the standard at the openable end of the gate as close as possible to the adjacent gate post and then loops a wire extending from the gate post over the standard.

Gates of this type are economical, but do not utilize the full potential of the barbed wire. It has thus been found that in many fence line applications greater overall economy is realized if the tension of the wire barrier of the gate is equal to and thereby counteracts the tension of the fence line wires. Otherwise, the tension of the fence line wires must be controlled by other means, such as tall gate posts interconnected by a wire at the top.

The co-pending application of Felix B. Romberg, Ser. No. 270,308, filed July 10, 1972, for TRACTION GATE discloses apparatus for applying traction either to a laterally swinging gate or to a wire barrier gate. By this means the tension of the fence line wires is counteracted without the necessity of utilizing additional apparatus for this purpose. Two traction applying mechanisms are disclosed in the prior Romberg application, both of which utilize a traction mechanism mounted on the gate post at the openable end of the gate to engage apparatus on the upper end of the adjacent standard and thereby apply traction to the wire barrier. The two traction mechanisms are further similar in that they are pivotable in a vertical plane and are thereby operated with equal facility from either side of the gate.

The present invention comprises a further improvement in the art of traction gates. In accordance with the broader aspects of the invention, a gate post at the openable end of a wire barrier gate is provided with a camming bar. A standard at this openable end of the gate includes a cam follower at the upper end which engages the camming bar as the gate is closed. By this means movement of the standard in one direction subjects the gate to traction with gradually increasing mechanical advantage and movement in the opposite direction releases the gate with gradual reduction in tension.

In accordance with the more specific aspects of the invention, the gate post and the standard at the openable end of the gate are provided with a cooperating T- bolt and a depending forked end, respectively, which function to position and retain the lower end of the standard. The upper end of the standard is equipped with a roller which engages the camming bar, and structure is provided for retaining the roller and protecting it from the elements when the gate is in the closed condition. A hook-shaped member extends inwardly from the gate post and receives the mid-portion of the standard, thereby preventing bending of the standard under the action of additional tension in the wires generated by livestock engaging the gate.

DESCRIPTION OF THE DRAWINGS A more complete understanding of the invention may be had by referring to the following Detailed Description when taken in conjunction with the accompanying Drawings, wherein:

FIG. I is a fragmentary side view of a gate incorporating a first embodiment of the invention;

FIG. 2 is a sectional view taken generally along the line 2-2 in FIG. 1;

FIG. 3 is a partial sectional view taken generally along the line 3-3 in FIG. 1;

FIG. 4 is a sectional view taken generally along the line 4-4 in FIG. 1;

FIG. 5 is a partial sectional view taken along the line 55 in FIG. 1;

FIG. 6 is a partial sectional view taken generally along the line 6-6 in FIG. 5;

FIG. 7 is an illustration of a locking pin useful in conjunction with the first embodiment of the invention;

FIG. 8 is a side view of the upper portion of the openable end of a gate incorporating a second embodiment of the invention;

FIG. 9 is a partial sectional view taken generally along the line 9-9 in FIG. 8; and

FIG. 10 is a partial sectional view taken generally along the line 10-I0 in FIG. 9.

DETAILED DESCRIPTION Referring now to the Drawings, and particularly to FIG. 1 thereof, there is shown a traction gate 20 incorporating a first embodiment of the invention. The traction gate 20 comprises part of a fence structure 22 including a plurality of fence line wires 24 which may comprise barbed wire. The fence line wires 24 extend between spaced apart fence posts which may comprise either wooden or metal fence posts in accordance with particular requirements. The fence 22 further includes a pair of

gate posts

26 and 28 which are spaced apart to define a relatively wide opening therebetween. It will be understood that the function of the gate 20 is to normally close the opening between the

gate posts

26 and 28 while facilitating selective opening thereof to permit the passage of livestock, farm equipment, etc. through the space between the gate posts.

The traction gate 20 comprises a wire barrier defined by a plurality of lengths of barbed wire 30 each of which is substantially parallel to the ground when the gate 20 is in the closed condition illustrated in FIG. 1. The lengths of barbed wire 30 are preferably formed from straight lengths of wire or from wire received on relatively large diameter rolls in order to prevent undue curling of the wires 30 when the gate 20 is opened. The wires 30 may also be formed from barbed wire received on relatively small diameter rolls, in which event the wires 30 are preferably straightened. The wires 30 comprising the traction gate 20 are preferably crosstied vertically by means of a plurality of commercially available helically twisted wire stays 32 which may be positioned at longitudinal intervals of approximately three feet along the length of the traction gate 20.

The right-hand end (FIG. I of each wire 30 comprising the traction gate 20 is secured to a short length of chain 34. Each length of chain 34 is in turn secured to an eye bolt 36. The eye bolts 36 extend through the generally gate post 28 and are each provided with a washer 38 and a nut 40. By this means each wire 30 comprising the traction gate 20 is individually hinged and adjustable for tension.

The left-hand ends (FIG. 1) of all of the wires 30 comprising the gate 20 are secured to the shaft 41 of a standard 42 which is disposed vertically adjacent the gate post 26 when the gate is in traction. As is best shown in FIG. 6, the strands of each wire 30 extend in a loop around the shaft 41 and through a lug 44 which is secured to the shaft on that side which faces the post 26 when the gate is closed. The lug 44 keeps the wire in place at its location, yet allows angular movement between the shaft and the wire, as when the gate is opened and closed, without destructive bending of the wire.

Referring to FIGS. 1 and 2, for supporting the lower end of the standard 42, the gate post 26 is provided with a T-bolt 46 including a shank 48 and a head 50 extending perpendicularly across the end of the shank. The end of the shank 48 remote from the head 50 is threaded and receives a washer 52 and a nut 54. A strap 56 is welded to the shank 48 of the T-bolt 46 and extends upwardly axially along the gate post 26. A bolt 58 extends through the strap 56 and through the gate post 26, and thereby serves to maintain the head 50 of the T-bolt in a horizontal position.

A plate 60 is welded to the bottom end of the shaft 41 of the standard 42 and is provided with a depending forked portion 62. As is best shown in FIG. 2, the forked portin 62 includes a pair of spaced apart tines 64 having tapered inner edges 66 and defining a semicircular opening 68 between the tines 64. The forked portion 62 is thus adapted to receive the shank 48 of the T-bolt 46 in the semi-circular opening 68 with the head 50 of the T-bolt 46 disposed behind the tines 64. By this means the lower end of the standard 42 is securely retained horizontally and against downward displacement relative to the gate post 26.

As is best shown in FIGS. 4 and 6, the upper end of the standard 42 comprises a roller 72 rotatable on the shaft 41 and preferably crowned. The roller 72 is retained between a stationary ring 74 and a plate 76 secured across the end of shaft 41.

The traction gate 20 further includes a roller camming receiving and protecting unit 78. As is best shown in FIGS. 1 and 6, the unit 78 includes an inner bar 80 and a bolt 82 welded to the bar 80 and extending through the gate post 26. The end of the bolt 82 remote from the bar 80 is threaded and receives a washer 84 and a nut 86. A strap 88 is secured to the unit 78 and extends upwardly therefrom axially along the post 26. A bolt 90 extends through the strap 88 and the post 26, and thereby maintains the orientation of the unit 78 lllustrated in FIG. 4.

Referring to FIGS. 4 and 6, the unit 78 further includes a top plate 92 having a rear portion 94 depending therefrom, both of which are welded to the inner bar 80. A camming bar 96 is in turn welded to the top plate 92 and the rear portion 94 thereof. The camming bar 96 is spaced from the bar 80 sufficiently to admit the roller 72 therebetween. As is best shown in FIGS. 4 and 5, the camming bar 96 curves outwardly with respect to the post 26 and extends somewhat angularly downwardly relative to the horizontal to be parallel to the midway position of the roller 72 as shown in dashed lines in FIG. 4.

Referring to FIGS. 4 and 7, the traction gate 20 may be provided with a retaining pin 98 comprising a steel shank 100 and a length of wire 102 secured to the upper end of the shank 100 and curving downwardly and inwardly to provide a handle and a locating surface 104. A collar 106 is secured to the upper surface of the top plate 92 and is provided with a slot 108. The pin 98 may be positioned in the retaining position illustrated in FIGS. 4 and 5 by aligning the wire 102 with the slot 108, whereupon the shank 100 is allowed to pass through an aperture 110 formed in the top plate 92. When it is desired to open the gate, the locating surface 104 may be engaged with the top surface of the collar 106 in the manner illustrated in dashed lines in FIG. 4, thereby retaining the shank 100 out of the path of the upper end of the standard 42. As is shown in FIG. 5, the top plate 92 may be provided with an aperture 112 adapted to receive the shank of a padlock (not shown) thereby locking the traction gate 20.

Referring to FIGS. 1 and 3, whenever the traction gate 20 is in the closed condition, the mid-portion 0f the standard 42 is received in a hook-shaped member 114. A shank 116 extends from the hook-shaped member 1114 through the post 26. The end of the shank 1H6 remote from the hook-shaped member 114 is threaded and receives a washer 118 and a nut 120, thereby facilitating adjustment of the position of the hook-shaped member 114.

The function of the hook-shaped member 114 is to prevent bending of the mid-portion of the standard 42 due to the additional tension generated in the wires 30 by livestock contacts. To this end, the hook-shaped member 114 and camming unit 78 preferably face toward the side of the fence 22 which will be most frequently employed to retain the livestock, etc. It is noted, however, that the hook-shaped member 114 serves to retain the standard 42 even if pressure is applied to the opposite side of the traction gate 20. Thus, when such pressure exerted on the wires 30 imposes a force on the standard 42 in the direction of the arrow 122, this increases the force applied by the standard 42 against the end portion 124 of the hook-shaped member 114. It will thus be understood that the frictional resistance tending to retain the standard 42 in engagement with the hook-shaped member 114 increases substantially linearly in proportion to an increase in the magnitude of a force applied to the standard 42 in the direction of the arrow 122.

To close the traction gate 20, the forked portion 62 at the lower end of the standard 42 is first advanced ahead of the lowermost wire 30 until it is engaged with the T-bolt 46 in the manner illustrated in FIG. 1. The.

roller 72 is then engaged with the camming bar 96 and is moved toward the plate portion 94 until it is positioned as shown in FIG. 5. To move the roller along the camming bar, the standard 42 is grasped between the two uppermost wires 30 from either side of the gate, a zone 126 being removed from the adjacent side of the post 26 to provide clearance for the hand.

As the traction gate 20 is being closed, the camming bar 96 functions to gradually apply tension to the wires 30 comprising the gate 20. It will be noted that when the upper end of the standard 42 is positioned as shown in FIG. 5, the tension imposed by the wires 30 on the standard 42 extends substantially perpendicularly to the direction of the roller engaged portion of the camming bar 96. Moreover, the roller 72is received under and between parts which protect it from rain, ice and dirt.

When the traction gate 20 is in the closed position,

I th wire 102 of the retaining pin 98 is aligned with the slot 108 in the collar 106 and the shank 100 is allowed to pass through the aperture 110. The shank 100 is thus positioned in the path of the upper end of the standard 42 and serves to retain the gate 20 in traction. The gate 20 may also be locked by inserting the shank of a padlock through the aperture 112. It will be noted that the underside of the top plate 92 is positioned sufficiently close to the plate 76 at the upper end of the standard 42 to prevent opening of the gate 20 by simply raising the standard 42 sufficiently to disengage the forked portion 62 from the T-bolt 46.

Those skilled in the art will appreciate the advantage of supporting the openable end standard in the middle of its length as well as at its two ends. As carried out in this invention the middle support does not require attention in gate operation and allows the use of a standard which is both lighter in weight and more economical to produce. Moreover, with the camming action the gate can be closed at once without first locating a traction lever, and can be opened without risk of being injured by a tension actuated released lever.

Referring to FIGS. 8, 9 and 10, there is shown a traction gate 130 comprising a second embodiment of the invention. The traction gate 130 forms part of a fence structure 1132 including a plurality of fence line wires 134 extending between a plurality of spaced apart fence posts. The fence 132 further includes a gate post 136 situated at the openable end of the traction gate 130. The traction gate 130 comprises a wire barrier defined by a plurality of lengths of barbed wire 138 each of which is connected to a gate post in the same manner illustrated in FIG. 1 with respect to the connection of the wires 30 to the gate post 28. The wires 138 of the gate 130 extend to a standard 140 having a lower end which may be identical to the lower end of the standard 42 as illustrated in FIGS. I and 2.

The uppermost wire 138 of the gate 130 is secured to the upper end of the standard 140 by means of a clevis 142 and a pin 144 extending through the clevis 142 and the standard 140. The remaining wires 138 are secured to the standard 140 by means of a plurality of lugs which may be substantially similar in construction and purpose to the lugs 44 as shown in FIG. 6, except one lug 146.

A roller 150 is mounted on the standard 140 at a point situated substantially beneath the upper end thereof. As shown in FIG. 10, the roller 150 is held in place between a lower ring 152 and an upper ring 154.. To provide protection from rain water, the upper end of the roller 150 is tapered and this taper is covered by an overhanging edge 158 of the ring 154.

The traction gate 130 further includes a camming and roller receiving unit 160. The unit 160 includes a shank 162 which extends through the post 136 to a washer 164 and a nut 166. A strap 168 is secured to the unit 160 and extends downwardly therefrom axially along the post 136. A bolt 170 extends through the strap 168 and the post 136 and serves to maintain the predetermined orientation of the unit 160 with respect to the post 136.

The unit 160 comprises a camming bar 172 and a roller receiving portion 174 formed integrally with the camming bar 172. A pair of ears 176 extend upwardly from the roller receiving portion 174 and a retaining member 178 is pivotally supported on the ears 176 by means of a pin M0. The member 178 is thus pivotable between the position shown in full and dashed lines in FIG. 8. It will be understood that when the member 178 is positioned as shown in full lines, the standard 142 is secured in traction. When the gate is thus secured in traction, the lug 146 on the standard 140 is adjacent to and extends beneath the structure of the roller receiving portion 174 where, by means of an upwardly facing shoulder 148, it prevents the standard 142 from being uplifted.

The traction gate shown in FIGS. 8, 9, and I0 is operated similarly to the traction gate 20 shown in FIGS. 1-7, and is equally adapted for one-hand operation. One difference between the operation of the two gates comprises the fact that the standard of the gate 130 is grasped at a point above the roller and beneath the point of connection of the uppermost wire 138 to the standard. To this end, the portion of the post 136 adjacent the uppermost portion of the standard 140 is removed to provide a zone 182 which receives the hand of the operator.

The gate shown in FIGS. 8, 9, and 10 preferably includes hook means for receiving and supporting the intermediate portion of the standard 140, such means being identical in structure and function to the members I14 and 116 illustrated in FIGS. I and 3 and described in connection with the first embodiment of this invention.

From the foregoing, it will be understood that the present invention comprises a traction gate incorporating numerous advantages over the prior art. Perhaps the most important feature of the invention relates to the fact that there is provided a camming bar for applying tension to a wire barrier gate as the gate is closed. By this means tension is applied gradually and automatically with mechanical advantage, and without the necessity ofthe operator manipulating a handle or other apparatus in order to apply tension to the gate. Another important feature of the invention is that, simultaneously with the camming movement, the mid-section of the standard is received by a hook which guards it against bending under extra wire tension such as occurs when an animal delivers thrust against the side of the wire barrier.

A particular advantage of the first embodiment of the invention is the superior protection from rain, dirt and ice that is provided for the roller in the closed gate. With this protection the roller retains grease and remains free from corrosion.

Although specific embodiments of the invention have been illustrated in the accompanying Drawings and described in the foregoing Detailed Description, it will be understood that the invention is not limited to the embodiments disclosed, but is capable of numerous rearrangements, modifications, and substitutions of parts and elements without departing from the spirit of the invention.

What is claimed is:

1. Apparatus for securing a wire gate in traction, comprising:

a gate post;

a standard positionable adjacent said gate post to support one end of a tensionable wire gate barrier;

means for making a pivotal connection between the lower end of said standard and said post;

a roller rotatably mounted at the upper end of said standard; and

a traction block stationary on said gate post and defining a longitudinally convex camming edge for said roller extending between a point of beginning and a location for holding said roller to retain the wire gate in traction;

said camming edge being longitudinally substantially perpendicular relative to said wire gate barrier at said holding location and being increasingly inclined towards said wire barrier outward from said location.

2. In a traction gate wherein a standard at the openable end of the gate supports one end of a wire gate barrier in tension and is in turn supported by a gate post;

rigid upper, lower and intermediate means mounted on said gate post for supporting said standard;

said upper supporting means comprising roller camming and terminal roller receiving portions;

said standard comprising a rotatably mounted roller for following said camming portion to said receiving portion;

said lower supporting means being constructed and positioned for pivoting said standard so the roller travels along said camming portion to said receiving portion; and

said intermediate supporting means comprising a hook for receiving said standard as said roller is moved along said camming portion to said receiving portion.

3. The combination according to claim 2 in which said lower supporting means comprises a stationary T- bolt extending from said gate post and the lower end of said standard comprises a forked portion for receiving said T-bolt, said T-bolt having a laterally expanded end to retain said forked portion against gate wire barrier tension and to establish the standard in a specific angular position.

4. The combination according to claim 2 in which said standard is a round shaft at its association with said stationary hook and said stationary hook is at the end of a bolt extending through said gate post.

5. For use in conjunction with a gate post carrying a stationary T-bolt and a stationary camming bar, a gate end standard for supporting tensionable longitudinal wires, comprising:

a shaft;

a forked portion extending longitudinally beyond one end of said shaft on one side of the axis of said shaft to receive said Tbolt and establish the angular position of said shaft;

a roller rotatably mounted along th other end of said shaft for rolling along said camming bar; and

lugs secured to said shaft at spaced intervals on the same side of the axis of said shaft as said forked portion;

said lugs defining loops over portions of said shaft for containing said longitudinal wires and keeping them in place on said standard.

6. A traction block for anchoring a roller topped wire traction gate end standard to a gate post, comprising:

a first structural element defining a longitudinally convex camming edge for engagement by the roller of said roller topped gate end standard;

a second structural element spaced from said camming edge for movement of said roller between them to a terminal point of its movement on said camming edge;

connecting means for connecting said first structural element with said second structural element above said roller at said terminal point;

bolt means integral with said second structural element and extending therefrom for extending through said gate post to secure the traction block thereto; and

arm means extending from said traction block for connecting said traction block to said gate post at a point spaced from said bolt means to prevent pivoting of said traction block at said bolt means;

the said terminal point on said camming edge being substantially aligned with said bolt means and said camming edge at said terminal point being longitudinally substantially perpendicular to this alignment.

'7. A traction block for securing a roller topped wire traction gate end standard to a gate post, comprising:

bolt means for extending through said gate post to secure said traction block thereto;

a first structural element transverse to the direction of said bolt means;

said first transverse structural element defining a longitudinally convex camming edge for engagement in a path of movement by the roller of said roller topped gate end standard;

a second structural element transverse to the direction of said bolt means;

said second transverse structural element being integral with said bolt means and being spaced from said camming edge for movement of said roller therebetween;

said first and second transverse structural elements being cobnected one to the other;

terminal structure to close the path of movement of said roller along said camming edge; and

latch means projectable into the path of movement of said roller to retain said roller adjacent said terminal structure.

8. The traction block according to claim 7 wherein said latch means comprises a tube extending away from said path of movement of said roller, and a latch bolt is slidable in said tube.

9. For use in conjunction with a pair of spaced apart gate posts, a traction gate comprising:

a wire barrier pivotally secured at one end to one of the gate posts and having a length substantially equal to the distance between the gate posts;

a normally vertically disposed standard secured to the opposite end of the wire barrier and defining the openable end of the gate;

means for securing the lower end of the standard to the second gate post;

a roller mounted on the upper part of the standard;

and

a camming bar curving outwardly from the second gate post for cooperation with the roller on the standard to gradually apply tension to the wire barrier as the gate is closed.

10. The traction gate according to claim 9 further including means mounted on the second gate post for receiving the mid-portion of the standard as the gate is closed and thereby preventing bending of the midportion of the standard due to tension in the wire barrier while the gate is closed.

11. The traction gate according to claim 10 wherein the means for securing the lower end of the standard to the second gate post comprises a forked portion depending at the bottom of the standard and a T-bolt extending from the second gate post to receive the forked portion of the standard.

12. The traction gate according to claim 11 wherein the camming bar further is associated with structure which includes means for selectively retaining the standard in the closed condition.

13. The traction gate according to claim 12 wherein the roller of the standard comprises the uppermost portion thereof, and wherein the combined camming bar and associated structure substantially protectively enclose the roller when the standard is in the closed condition.

14. The traction gate according to claim 12 wherein the roller of the standard is mounted substantially beneath the upper end thereof, and further including han dle means comprising a portion of the standard extending above the roller.

15. A traction gate comprising:

fence structure including first and second spaced apart gate posts;

a plurality of bolts secured in the first gate post and extending toward the second gate post;

a plurality of lengths of chain each secured to one of the bolts;

a plurality of lengths of barbed wire each secured to one of the lengths of the chain;

an elongate, normally vertically disposed standard;

said lengths of barbed wire each being secured at the end remote from the lengths of chain to the standard and secured against axial displacement with respect thereto;

a T-bolt secured in the second gate post and extend ing towards the first gate post;

a forked portion extending downwardly at the bottom of the standard for engagement with the T-bolt to secure the lower end of the standard to the lower part of the second gate post;

a roller mounted on the upper part of the standard;

a roller receiving and camming unit secured to the upper end of the second gate post and comprising a roller cooperating camming bar curving toward the second gate post and a roller receiving portion positioned in alignment with the first and second gate posts;

Said roller cooperating camming bar being curved to gradually apply tension to the barbed wire as the traction gate is being closed.

16. The traction gate according to claim 15 further including a hook-shaped member secured in the second gate post and extending therefrom towards the first gate post for receiving the mid-portion of the standard as the traction gate is closed and thereby limiting bending of the standard due to the action of tension in the barbed wires.

17. The traction gate according to claim 15 wherein the roller comprises the uppermost portion of the standard and wherein the combined camming bar and roller receiving unit further includes protecting means for substantially enclosing the roller when the standard is in the closed condition.

18. The traction gate according to claim 15 wherein the roller is mounted on the standard at a point substantially beneath the upper end thereof and wherein the standard further includes handle means comprising a portion of the standard extending upwardly from the roller.

Claims

1. Apparatus for securing a wire gate in traction, comprising: a gate post; a standard positionable adjacent said gate post to support one end of a tensionable wire gate barrier; means for making a pivotal connection between the lower end of said standard and said post; a roller rotatably mounted at the upper end of said standard; and a traction block stationary on said gate post and defining a longitudinally convex camming edge for said roller extending between a point of beginning and a location for holding said roller to retain the wire gate in traction; said camming edge being longitudinally substantially perpendicular relative to said wire gate barrier at said holding location and being increasingly inclined towards said wire barrier outward from said location.

2. In a traction gate wherein a standard at the openable end of the gate supports one end of a wire gate barrier in tension and is in turn supported by a gate post; rigid upper, lower and intermediate means mounted on said gate post for supporting said standard; said upper supporting means comprising roller camming and terminal roller receiving portions; said standard comprising a rotatably mounted roller for following said camming portion to said receiving portion; said lower supporting means being constructed and positioned for pivoting said standard so the roller travels along said camming portion to said receiving portion; and said intermediate supporting means comprising a hook for receiving said standard as said roller is moved along said camming portion to said receiving portion.

3. The combination according to claim 2 in which said lower supporting means comprises a stationary T-bolt extending from said gate post and the lower end of said standard comprises a forked portion for receiving said T-bolt, said T-bolt having a laterally expanded end to retain said forked portion against gate wire barrier tension and to establish the standard in a specific angular position.

5. For use in conjunction with a gate post carrying a stationary T-bolt and a stationary camming bar, a gate end standard for supporting tensionable longitudinal wires, comprising: a shaft; a forked portion extEnding longitudinally beyond one end of said shaft on one side of the axis of said shaft to receive said T-bolt and establish the angular position of said shaft; a roller rotatably mounted along th other end of said shaft for rolling along said camming bar; and lugs secured to said shaft at spaced intervals on the same side of the axis of said shaft as said forked portion; said lugs defining loops over portions of said shaft for containing said longitudinal wires and keeping them in place on said standard.

6. A traction block for anchoring a roller topped wire traction gate end standard to a gate post, comprising: a first structural element defining a longitudinally convex camming edge for engagement by the roller of said roller topped gate end standard; a second structural element spaced from said camming edge for movement of said roller between them to a terminal point of its movement on said camming edge; connecting means for connecting said first structural element with said second structural element above said roller at said terminal point; bolt means integral with said second structural element and extending therfrom for extending through said gate post to secure the traction block thereto; and arm means extending from said traction block for connecting said traction block to said gate post at a point spaced from said bolt means to prevent pivoting of said traction block at said bolt means; the said terminal point on said camming edge being substantially aligned with said bolt means and said camming edge at said terminal point being longitudinally substantially perpendicular to this alignment.

7. A traction block for securing a roller topped wire traction gate end standard to a gate post, comprising: bolt means for extending through said gate post to secure said traction block thereto; a first structural element transverse to the direction of said bolt means; said first transverse structural element defining a longitudinally convex camming edge for engagement in a path of movement by the roller of said roller topped gate end standard; a second structural element transverse to the direction of said bolt means; said second transverse structural element being integral with said bolt means and being spaced from said camming edge for movement of said roller therebetween; said first and second transverse structural elements being cobnected one to the other; terminal structure to close the path of movement of said roller along said camming edge; and latch means projectable into the path of movement of said roller to retain said roller adjacent said terminal structure.

9. For use in conjunction with a pair of spaced apart gate posts, a traction gate comprising: a wire barrier pivotally secured at one end to one of the gate posts and having a length substantially equal to the distance between the gate posts; a normally vertically disposed standard secured to the opposite end of the wire barrier and defining the openable end of the gate; means for securing the lower end of the standard to the second gate post; a roller mounted on the upper part of the standard; and a camming bar curving outwardly from the second gate post for cooperation with the roller on the standard to gradually apply tension to the wire barrier as the gate is closed.

10. The traction gate according to claim 9 further including means mounted on the second gate post for receiving the mid-portion of the standard as the gate is closed and thereby preventing bending of the mid-portion of the standard due to tension in the wire barrier while the gate is closed.

14. The traction gate according to claim 12 wherein the roller of the standard is mounted substantially beneath the upper end thereof, and further including handle means comprising a portion of the standard extending above the roller.

15. A traction gate comprising: fence structure including first and second spaced apart gate posts; a plurality of bolts secured in the first gate post and extending toward the second gate post; a plurality of lengths of chain each secured to one of the bolts; a plurality of lengths of barbed wire each secured to one of the lengths of the chain; an elongate, normally vertically disposed standard; said lengths of barbed wire each being secured at the end remote from the lengths of chain to the standard and secured against axial displacement with respect thereto; a T-bolt secured in the second gate post and extending towards the first gate post; a forked portion extending downwardly at the bottom of the standard for engagement with the T-bolt to secure the lower end of the standard to the lower part of the second gate post; a roller mounted on the upper part of the standard; a roller receiving and camming unit secured to the upper end of the second gate post and comprising a roller cooperating camming bar curving toward the second gate post and a roller receiving portion positioned in alignment with the first and second gate posts; said roller cooperating camming bar being curved to gradually apply tension to the barbed wire as the traction gate is being closed.