DE71984C - Wrench ratchet - Google Patents

Description

IMPERIAL

PATENTAM

The present invention relates to a screw head or nut of various sizes usable and automatically adapting wrenches to these sizes, which acts like a ratchet when used without being removed.

In Fig. Ι the new wrench ratchet is partially in longitudinal section and view, with ventilated jaws, in

Fig. Ι a the same key partially in longitudinal section and in view, with tightened Baking, and in

Fig. 2 shows a cross section of the key.

As can be seen from Fig. 1 and 2, the key head α consists of two segment pieces which are firmly connected on one side by a cross piece a ¹ , forming a cavity between them. The upper end of these segment pieces is worked out into a jaw a ~ which forms the entire thickness of the wrench head and which is intended to rest with its inner surface on one side of the screw head or the nut. In the Nuth b ^2, the guide piece läfst b ¹ of the second movable, with respect to ar equally shaped jaw to and fro, so much so these jaw DAF b to the opposite face lean (side) of a erfafsten bolt or nut can of their working surfaces b .

The lower surface of this guide piece b ^l is toothed, and the opposing teeth of a locking piece i engage in these teeth when the latter is advanced towards b ^1. This locking piece i is mounted in the recess of a lever rod c and is provided with an obliquely positioned elongated bore k through which a pin stuck in the side walls a of the key head passes. . _

In a bore of the lever, a spiral spring m is arranged, which tends to attract the locking piece. The two-armed lever c is rotatably connected to the key head by a fixed bolt d and moves in the vacated space of the segment-like key head a.

As can be seen by dotted lines (Fig. 1), in the upper part of the lever there is a recess f, in which a driver g is mounted, which is connected at its rear end by a bolt e to a handle e ¹ attached to the side outside the lever, while the front, hook-shaped end is connected to the jaw by an eyelet η attached to the side of the guide piece b ^{l of} the jaw b , so that the latter can be moved back and forth in the grooves of the key head ^{by moving the handle e 1.}

A tension spring h mounted in the recess of the lever c praises its head against the side surface of the driver g and presses the same together with the cheek piece b inwards as soon as the handle e ^{1 is} released and the tension spring h can utter its force.

The handling of the key is as follows:

The lever c is grasped and, by pressing a finger, the handle e ^l (in the direction of the arrow I, FIG. 1) is rotated to the right, where-

Claims (3)

through the associated driver g performs the opposite movement and pulls the jaw b with it until the screw head to be moved finds space between the jaws a ² and b. If then, "after releasing the handle e \ with the lever c the movement in the direction of arrow II, Fig. Ι (to the left), aasführung, the short forearm of the lever c makes the opposite movement and presses against that located in the end recess Locking piece z, which thereby participates in the lateral movement. But since it has to slide with the inclined slot k on the immovable pin /, it also receives a forward movement when pressed by the spring m and its teeth enter the teeth b 'des Back piece b. as a result, but the back piece is b gefafst and advanced until the inner surface thereof, and the opposing surface of the second fixed jaw Λ ² BEZW the screw head. clamp a nut. The continuation of the indicated movement of the lever c now causes the screw head or the screw nut to rotate in order to tighten or to ventilate. If, on the other hand, the lever c is used to move backwards (to the right in the drawing), the locking piece i returns to its original position, and the released jaw b , which has only been pressed by the spring h, can now easily move back over the edge of the screw head or the nut, whereupon it is pressed against the next side of the screw head or the nut by the spring and is tightened again by the locking piece i when the lever c is moved forward again. In this way you can continue as long as the without removing the key Screw or nut should be turned to tighten or release. In Fig. Ι a, the reference letters are provided with a ('). Pate nt-Ans ρ röche: ι. A wrench ratchet, characterized by a toothed locking piece i, which is mounted in an end recess of the two-armed hand lever c rotatably connected to the one fixed and one loose jaw (a ^% b) carrying the wrench head α and with a slot k arranged at an angle to its toothed surface in the key head fixed pin / is slidingly arranged, so that by lateral forward movement of the hand lever c to the left with the key head α stationary, the locking piece is moved in an inclined ascending direction, the toothed side engages in the toothing of a guide piece b ^l carrying the movable jaw and means the same firmly presses this jaw against the object to be rotated, screw head or nut, but automatically releases jaw b again when the hand lever c is moved back to the right. 2. A wrench ratchet according to claim i., Characterized by a spring h pressing against the movable jaw b , which allows this jaw b to retreat over the edge of a screw or nut without removing the key, but the same immediately to the next screw head or nut side applies. 3. A wrench ratchet according to claim ι., Characterized by .eine with pusher e ^! provided driver g for the movable jaw b, in order to move it by a pressure against e ¹ from the fixed jaw a? The respective size of the screw head has to be removed from the nut accordingly. 1 sheet of drawings.