![]() The housing 23 (on the side disposed away from the cylinder 24) is provided with a bracket 38 to which one end of an arcuate lever 39 is pivotally secured, while the other end of lever 39 has one end or a rack rod 40 pivotally secured thereto. The outer end of rod 35 preferably is threaded to receive a washer and nut as at 31 whereby the spring 35 is compressed against the end wall 26 and the tension controlled and a constant pressure on rod 35 exerted which tends to shift pin 33 with actuating pawl 34 forwardly or toward the right in Figure 4. The pin 33 also has the inner end of a rod 35 operatively connected therewith the rod extending through the end wall 20* of the housing and the outer end of the rod provided with a suitable coil spring 36. The housing at one end is providedwithside wall portions 20 see Figure' i, between which a counterweighted pawl or detent 3| is pivotally mounted while-its inner toothed end normally remains engagement with the teeth" of" rack bar 26:" 'Ilie' 'housingsidawalls fl arapievidd with the longitudinally extending slot 32 to receive the pin 33 for pivotally supporting the counterweighted actuatin pawl 36 whose upper toothed end is arranged in mesh with rack bar 26 and causes the latter to move inwardly of the housing 20 when occasion for slack take-up arises while detent 3| holds the adjusted relation between the housing and rack bar and prevents outward sliding movement of the rack bar. One end of lever 28,in the'particular exemplification, is pivotally connected toabracket 29 se'-' cured on the pressure head of the cylinder 24 while the other end of lever 23 has the toprod of the brake rigging pivotally secured thereto: as shown" at 30 As shown, the housing 20 and the rack bar 26 constitute-an extensible and regulable tie means between the live lever '22'and deado'r floating lever 28' regulation being accomplished by mechanism to be described. ![]() The housing 20 is'provided with a slidable rack bar 26, adapted to move inwardly through theleft hand open end of the housing and its outer end enlarged for receiving the connectingrod 2! which is pivotally connected to the dead or floating lever-28 as shown in Figures 1 and 2. cylinder 25, while the -other end ofthe lever 22 is pivotally connected to'the'rod of the'brake-rigging as shown at 25. The exemplification of my improved brake slack adjuster involves anelongated open ended housing 20 provided with a fork orapertu'redext'en sion 21 for pivotally securing it to thecylinder live lever 2-2 whose one end is pivotally connected to the piston rod 23 of the brake. slack adjusters mechanical and self-acting in one direction ![]()
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