Patent GB-190518465-A (GB)
Title: Improvements in Stone-sawing and similar Machines
Inventor: HARRISON RICHARD CLAREMONT
Filed: 1905-09-13
Granted: 1906-11-13
Abstract: 18,465. Harrison, R. C., [Alston, O. W.]. Sept. 13. Sawing.-The driving- shaft 4 of a stone-sawing or similar machine has its connecting-rod 7 pivoted upon a plate 8, which is connected by cables to a sector 9, Fig. 14, secured to the rock-shaft 10 by a clutch 9<1>, the sector having grooves 12 to receive the cables and a groove 14 to receive a tongue on the plate 8. Near the pivot the plate has a lever 15 which is connected to the sector by a lever 16. The shaft 10 oscillates a sector 90, which is vertically adjusted and kept in line with a sector plate 80, attached to it by cables and also attached to the saw frame 3, which is thus reciprocated. The saw frame is supported on sectors 17, Fig. 5, being provided with a guide-track 19 to obtain a straightline motion and having a compensation lever 28, pivoted to the sector at 29<a>, and at 27 to a bracket 26 bolted to the saw frame. The guide-track is thus continuously in contact with the sector 17. To prevent the sectors from slipping or sliding on the tracks, cables are fastened to the ends of the sectors and to the opposite ends of the tracks 21, 24. To economize in power and wear, these sectors have recoil springs S fastened to bolts S<b>, which are pivoted to the track and extend through an aperture in the face of the sector. This object is also attained by an arrangement shown in Fig. 13. These sectors 17 are mounted on bearings which are vertically adjustable on slides by means of suspension cables R, fastened to the slide bearings and passing over grooved pulle) s 57, and being fixed to a drum 60. In order to rotate the drum 60, two friction disks 37 are rotated in opposite directions by a belt 38, and between them is a friction roller vertically adjustable by the rise and fall of a lever 34. This roller is mounted on a shaft 41 which by worm gearing rotates a drum 30, which is connected to the drum 30<1> on the same shaft as the drum 60 by a cable 31 passing round a pulley 33 which supports a balance weight on the lever 34 pivoted to the machine framing at 35, In order that the saw frame may have a slow downward motion and a quick return, the shaft 41 is made in two parts, the lower half 41<a> of which carries the slidable part of the clutch and the upper part, which has the worm, the other part. The pallet plate 43 is rotatably mounted on the shaft 41<a> and has a pivot bearing for an internal curvilineal pallet, having a flexible point 45 serving as a pawl and held against the inside toothed face of the part 43 by a spring 41<b>. The plate is prevented from recoil by a pawl 25, and is intermittently rotated by a cam 44 in the opposite direction to the shaft 41<a>. To raise the saw frame, the pawl 25 is disengaged and the clutch thrown into mesh. The cam 44 may be replaced by a short arm having pivoted to it a pulley rotated by the shaft 41<a>, Double instead of single pawl action may be used. The pawl may be raised and the clutch operated automatically by a rod 50, attached to which is a weighted lever 50<1> supplied with a trip acted on by a cross-head 29: The clutch 9<1> and the clutch for the pulley of the belt 38 may be put out of action simultaneously by the cross-head and a lever 49, or separately by hand-levers. The sector 90 may be kept in line horizontally by a suspension cable R<1> passing over a pulley 57<1> and fixed to the drum 60.