US2705898A - Brace with detachable torque applying bar - Google Patents

Description

April 12, 1955 A. c. LAZIER 2,705,898

BRACE WITH DETACHABLE TORQUE APPLYING BAR Filed Dec. 26, 1952 2 Sheets-Sheet l I f [TIMI April 1955 A. c. LAZIER BRACE WITH DETACHABLE TORQUE APPLYING BAR Filed Dec. 26, 1952 2 Sheets-Sheet 2 United States Patent BRACE WITH DETACHABLE TORQUE APPLYING BAR Allan C. Lazier, Los Angeles, Calif., assignor to Northrop Aircraft, Inc., Hawthorne, Calif., a corporation of California Application December 26, 1952, Serial No. 328,064

3 Claims. (CI. 81-73) My invention relates to the field of tools and more particularly to that type used in securing and releasing fasteners.

Where many fasteners having the same type head are to be removed it is common to employ a speed brace with a bit adapted for the particular fastener being secured or removed. As is likely on many occasions a fastener is stuck and the amount of leverage afforded by the brace is inadequate to overcome the resistance offered by the aforementioned fastener. It is a very probable consequence that the fastener head will be scarred or mangled necessitating removal by drilling. This may ruin the surrounding parts and should they be expensive, a problem is encountered worthy of overcoming.

It is, therefore, an object of my invention to provide a means for affording extra leverage, where needed, to a bracing tool such that additional force necessary to loosen a fastener may be brought to bear on the recalcitrant art. P In one form my invention employs a detachable rigid member in conjunction with a conventional speed brace effective to afford additional leverage thus allowing a greater torque to bear against the fastener.

For a complete disclosure of my invention a detailed description of a preferred embodiment and modifications thereof will now be given in connection with the accompanying drawings forming a part of the specification wherein:

Figure 1 is an assembled perspective drawing of the detachable torque bar.

Figure 2 is a view of the invention looking from arrow number 2 of Figure 1 showing the bar attached to a brace.

Figure 3 is a cross-sectional view of the bar looking from line 3-3 of Figure 2 showing the crank axis of the brace, in shadow, extending through.

Figure 4 is a front view of the bar clamped to the brace and there secured.

Figure 5 illustrates a modification of my inventive bar showing its position at rest and when operative.

Figure 6 is an enlarged fragmentary perspective View of a portion of the device shown in Figure 5.

Figure 7 is a cross-section view along the line 7-7 of Figure 5.

Figure 8 is a perspective view of a modification of the invention.

Figure 9 is a front elevation of my invention showing the torque applying member pivotally connected to the brace.

Figure 10 is an end view of the torque applying member.

Referring in detail to the figures, torque applying member 1 is composed of an extended tubular bar 2 and a clamp 3. The bar 2 is made with a short longitudinal slot 4. The clamp 3 is composed of an upper portion 5 having a semicircular transverse channel 6 and a lower portion 12. Riveted at 6(a) to said upper portion 5 is a short internal longitudinal tube 7 with a longitudinal slot 8 whose configuration is coincident with that of slot 4, the tube 7 being riveted to the bar 2 at 9. Attached by a nut 10 and bolt 11 to the upper portion 5 at one end, so as not to be readily detachable, is a rectangular thin plate 12 having a transverse slot 13 at the other end. Press fitted into the other end of 5 is an elongated member 14, or stud, threaded at one end 15. Thus the plate 12 is able to pivot about "ice the longitudinal axis of the bolt 11. To secure a member 16, such as a brace, within the head channel 6, a wing nut 17 is provided on the threaded end 15. Figure 4 shows the tubular bar 2 attached to a brace 16 by the clamp 3, the crank axis 18 of the brace 16 fitting into the cutaway slots, 4 and 8.

A modification of the invention is shown in Figures 5 and 6 wherein the bar 2 pivots about a pin 20 which is riveted to a U-type bracket 21 which is held tightly in place by two sets of nuts and bolts 22 which bind against one side of the brace 16 along its longitudinal or turning axis 19, while the pin 20 binds against the other side of the brace 16 at its transverse or crank axis 18. The bracket 21 is formed with slits 25 to allow a portion 26 of the bracket 21 to close about the brace 16 under the force exerted by the nuts and bolts 22. Pinned to the brace 16 are clips 27, 28 placed along the crank axis 18 and longitudinal axis 19 respectively. When the bar 2 is disposed along the crank axis 18 it is held there by an internal clip 27 riveted to the inside of bar 2, said clip is shown in detail in Figure 7. The clip 27 is allowed sufiicient room in its housing 2 for expansion under the side wall pressure of the brace 16 when the latter is being placed within the clip 27. The resilient character of the clip 27 will result in securing the bar tentatively in place. Clip 28 is larger than clip 27, in that it must clip over the entire bar 2, and is used in holding the bar 2 in its inoperative or quiescent position.

A still further modification of my invention is shown in Figure 8 wherein the extended bar is made in telescopic sections 30 of any desirable cross section.

Though the clamp 3 has been described in detail it is to be understood that any other convenient means of releasably securing the bar 2 may be used.

To better understand my invention a short description of its operation will be given. The bar 2 is fitted onto the brace 16, or any other thrust transmitting member desirable for use, such that the crank axis 18 of the brace 16 engages the slots 4 and 8 of the bar 2. The operator of the tool is then able to exert more leverage on the part being engaged by the drive socket 31, i. e., nut, etc. In the modification shown in Figure 5 the bar 2 is pinned to the brace 16 by a U-bracket 21 and is able to pivot on a pin 20. When not in use it is held along the longitudinal axis 19 of the brace 16 by a clip 28. This is considered the quiescent position. To use the modified bar of Figure 5, it is removed from clip 28 and rotated to a position along the crank axis 18 where it is held in place by clip 27.

While in order to comply with the statute, the invention has been described in language more or less specific as to structural features, it is to be understood that the invention is not limited to the specific features shown, but that the means and construction herein disclosed comprises preferred forms of several modes of putting the invention into effect and the invention is therefore claimed in any of its forms or modifications within the legitimate and valid scope of the appended claims.

What is claimed is:

1. A device for transmitting torque to an adjustable rotary bit, comprising: a torque transmitting member formed as a brace, a torque applying member formed as a rigid member pivotally secured to said brace and adjustable in length, a portion of said rigid member being formed as telescopic concentric portions, the connection of said torque applying member to said torque transmitting member being eifective to apply torque when positioned approximately perpendicular to the brace and quiescent when positioned adjacent to said brace.

2. A device in accordance with claim 1 further characterized by the fact that said torque applying member is pivotally connected at the junction of the crank axis and the turning axis of said brace. I

3. A device in accordance with claim 2 further characterized by clipping means being attached to the crank of said brace and being so connected as to be efiective to retain said torque applying member in its quiescent position and a clipping means secured to said torque applying member to retain said member in its torque 3 .applying position against a transverse portion of said 1,741,810 brace. 1,991,766 2,476,364 References Cited in the file of this patent UNITED STATES PATENTS 5 291973 89,925 Fray May 11, 1869 461,870 1,656,967 Welch Jan. 24, 1928 828,676

4 Bidal Dec. 31, 1929 Matveyeff Feb. 19, 1935 Gaines July 19, 1949 FOREIGN PATENTS Great Britain June 14, 1928 Great Britain Feb. 25, 1937 France Feb. 21, 1938

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