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41. 发明专利

GB755127A Feed cam trip mechanism for gear shapers 未知
公开(公告)号：GB755127A
公开(公告)日：1956-08-15
申请号：GB671554
申请日：1954-03-08
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F23/00
摘要： 755,127. Gear-cutting. FELLOWS GEAR SHAPER CO. March 8, 1954 [April 20, 1953], No. 6715/54. Class 83 (3). A gear-shaping machine comprises a cutter carriage 102 by which the cutter is fed radially to depth and withdrawn to allow removal of a finished workpiece, a depth feed cam 100 on a shaft 1, primary and secondary rotating means for the shaft, and means to actuate the secondary rotating means in accordance with a predetermined rotation of the cutter and work spindles. The feed cam 100, driven by primary means through a pawl-and-ratchet or one-way clutch, not shown, moves the carriage 102, through a follower 101, to feed the work to depth and, if necessary, to dwell for one or more revolutions of the work before a recess 3 allows the carriage to be withdrawn by a weight or other means. The secondary rotating means 4 on the shaft 1 is rotated at the precise moment that the cutting is complete to add an additional rotation to the cam 100 to bring the recess quickly opposite the follower 101. The gear 4 is normally driven by the shaft 1 to rotate, through gears 5-7, a shaft 8. The shaft 8 carries a disc 27 which is adjustable by a gauge 33 and carries a stop 32. The stop 32, when cutting is complete, trips a rod 43A which pivots a lever to withdraw a plunger 43 and allow a plunger 22 to be thrust forward by a spring 23. The plunger is toothed to rotate a segment 14 which, through three ratchets 16-18 and wheel 15, adds a rotational movement to the shaft 8 and hence to the cam 100. Further rotation of the disc 27 causes the stop 32 to rotate a bell-crank 50 and reset the plunger 22 by a screw 46. In a simplified form, the cam-shaft 200 carries a cam 212 formed with an inclined face 222 which can be engaged by a similar face 221 on an arm 214 urged downwardly by a spring 216. Engagement of the faces thus causes an acceleration in the speed of the feed cam at the moment of withdrawal of the tool. The point at which withdrawal occurs is adjusted by rotating a mounting-plate 203 by gearing 207, the adjustment being indicated by a scale 210.

42. 发明专利

FR1112649A 未知
公开(公告)号：FR1112649A
公开(公告)日：1956-03-16
申请号：FR1112649D
申请日：1954-11-13
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F19/00 , B23F19/10

43. 发明专利

GB709064A Improvements in or relating to hobbing tools 未知
公开(公告)号：GB709064A
公开(公告)日：1954-05-12
申请号：GB3141950
申请日：1950-12-27
申请人： FELLOWS GEAR SHAPER CO
发明人： RILEY JOSEPH
IPC分类号： B23F21/16
摘要： 709,064. Milling-cutters. FELLOWS GEAR SHAPER CO. Dec. 17, 1951 [Dec. 27, 1950], No. 31419/50. Class 83 (3) A hob comprises removable blades 4 having an extensive overhanging leading-edge 7, an element 12 associated with each blade and entering a groove in a wall of the slot 2 in which the blade is secured, and clamping means 14 to engage the element and force the blade against the rear and base walls of its slot. The elements 12 may be pins, of any cross-section, and may be formed integrally with, or secured to, the blades 4. The blades are secured axially by plates 5. The slots 2 may be oblique to the hob axis.

44. 发明专利

GB685084A Gear shaping machine 未知
公开(公告)号：GB685084A
公开(公告)日：1952-12-31
申请号：GB2295350
申请日：1950-09-19
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F5/14
摘要： 685,084. Gear-cutting. FELLOWS GEAR SHAPER CO. Sept. 19, 1950 [Nov. 30, 1949], No. 22953/50. Class 83 (iii). A machine for shaping helical gears comprises a rack-cutter C mounted on a slide 68 which is reciprocated in a direction parallel to the teeth of the cutter, and means for traversing a spindle carrying a work-gear W and a master helical gear 56 meshing with a master rack 41. The pitch and tooth characteristics of the gear W depend on the cutter C and the pitch diameter is equal to that of the master gear. A second rack 42 below the rack 41 is adjustable to enable backlash to be eliminated. The pitch diameter may be checked by a master roll on the workspindle to contact a master bar 44. The workspindle is adjustably mounted on a slide 15, an inclined bar 92 allowing the work to be adjusted towards or from the cutter. The slide 15 is traversed by a motor 16 driving a screw 24 through change-gearing. Stops 148 on the slide control a cycle of operations through a lever 146 and a switch 140. The lever 146 has a release device 150. The rack C has a flexible web 64 and is attached to a block 66 bolted to the slide 68. The inter-engaging surfaces are longitudinally inclined so that the cutter may be adjusted towards and from the work. Embracing the cutter are members 84, 86, attached to a slide 82 which is moved at the end of each stroke of the cutter-slide to flex the cutter against one of two abutments formed on the block 66. Movements of the slides 68, 82 are controlled by an adjustable crank 122 which reciprocates the slides, the slide 82 being connected thereto by a cam 128 which provides the rocking movement for the cutter. The crank is rotatable by a motor 100 on a slide 13 which is adjusted by screw means 102 to position the cutter initially. Specifications 655,251 and 655,294 are referred to.

45. 发明专利

GB669207A Improvements relating to gear shaping machines 未知
公开(公告)号：GB669207A
公开(公告)日：1952-03-26
申请号：GB2190749
申请日：1949-08-23
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F5/16
摘要： 669,207. Gear-cutting; planing. FELLOWS GEAR SHAPER CO. Aug. 23,1949 [Sept. 16, 1948], No. 21907/49. Class 83 (iii). [Also in Group XXIV] In a gear-shaping machine having rotatable work and cutter spindles, means for reciprocating one of the spindles comprises a pitman 64, Fig. 14, which is coupled with a crank 62 and has a screw element 64a meshing with a gear 65 on an axis transverse to the pitman, and transmission mechanism between the gear and the spindle, the screw element 64a being adjustable about its axis with respect to another part of the pitman and having its axis radial to the crank. Change-speed gearing; reversing.-A single electric motor 36, Fig. 22, rotates the cutter and work spindles, which respectively carry worm-wheels 110, 99, through twelve-speed gearing 42-56. A hand-lever 229, Figs. 1 and 14, operates the speed-changes through two barrel-cams 225, 218, Fig. 3, controlling shifter-rods, the appropriate cam being selected by a knob 240 and the gear-speed being indicated by dials 234, 235. Spring-pressed balls 228, Fig. 14, assist in positioning the gears. Further speed changes are provided by gears 79-81, Fig. 22, selected by a four-position lever 262, Fig. 3. Change-gears 75, 76, and 92-96, are also provided. The drive can be reversed by a hand-crank 88 connected to bevels 83, 84. The cutter-spindle is independently reversible by bevels 102, 103, according to whether internal or external gears are to be cut. The worm-wheel 110 is engaged by a worm 109 which is adjustable for backlash and is situated on the same side of the spindle as the zone of cutting engagement. The cutter is reciprocated by the adjustable crank 62, Figs. 14 and 22, on the shaft 58. It can also be reciprocated manually by a hand control 250, Fig. 1; which is effective only if a lever 261 is held in position to engage gearing on the shaft 41, Fig. 22. The crank 62 oscillates a shaft 66 through the rod 64a, the shaft 66 having teeth engaging a circumferential rack 70, Fig. 3, on the cutter-spindle 35. Stroke indicators; cushioning.-The limits of the cutter-travel can be adjusted without altering the length of the stroke, indicated by a graduated scale, 63a, Fig. 14, by manually turning the rod 64a. The cutter-spindle is counter-balanced by mechanism 35a. Cutting helical wheels.-The cutter-spindle slides in guides 111, 112, Fig. 3, which are of helical formation when helical gears are to be cut. The cutter-carriage 34 is adjusted initially for cutting internal or external gears, along guides 33 by a nut which is rotated manually through a shaft 163 and which engages a screwed shaft 156. Feed-mechanism; beds, framings, etc.; stopmotions.-The cutter is fed to depth by moving the shaft 156 longitudinally by means of a toothed segment 158 controlled by a depth feed cam 155, a constant force being applied to the shaft 156 by a spring 193, Fig. 14, which is anchored to the machine frame and acts through a pinion 197, Fig. 3. In operation, rotation of the work-driving worm 98, Fig. 7, actuates, through a flexible shaft 203, a timing device, which, after one revolution of the work W, operates a solenoid to withdraw a catch 179, Fig. 14, to allow a roller 167 to engage a cam 61 on the shaft 58. The cam 61 advances a rod 171 to rotate a ratchet-wheel 176 by an amount determined by a stop 177. The wheel 176 rotates a second ratchet-wheel 189 connected with the depth feed-cam 155. The wheel 189 also rotates a carrier 199 on which dogs 204, Fig. 1, are adjustably mounted. The dogs actuate a switch 208 to release the catch 179 after each advance of the cutter. A fixed cam on the carrier 199 actuates a switch 212 to stop the machine when cutting is complete. The double ratchet-drive 176, 189 enables the depth feed cam 155 to be manually adjusted by a shaft 190 independently of the cam-drive. The work W is supported on a table 27, Figs. 3 and 7, which carries the worm-wheel 99 and is supported on the frame by a link 28 pivoted to the frame at 29 and by bearing surfaces 114, 115. The table may be swung clear of the superstructure of the machine, by a lever system operated by a lever 128, Fig. 1, the table being then supported by a roller 130 on a swinging arm 131. The table is relieved on non-cutting strokes by a cam 135, Fig. 7, which, through an adjustable arm 140, oscillates the table about the pivot 29. Teeth on the arm 140 mesh with a segment 143 which is mounted on the table and can be withdrawn by a handle 151.

46. 发明专利

GB668392A Improvements in injection molding apparatus 未知
公开(公告)号：GB668392A
公开(公告)日：1952-03-19
申请号：GB889349
申请日：1949-04-01
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B29C45/58
摘要： 668.392. Injection-moulding machines TRIGGS, W. W. (Fellows Gear Shaper Co.). April 1, 1949, No. 8893/49. Class 87(ii) The separator 26 is separate from the injection cylinder 11 and has a tapered exterior complemental to the tapered bore of the cylinder. The included angle of taper is not more than 15 degrees, and causes a binding effect that prevents the separator from being dislodged under endwise pressure set up by the pull of the material on the return stroke of the piston 14. Channels 28 are formed between fins 27 on the separator. The bottoms of the channels run parallel to the axis of the separator so that their depth decreases from the rear end to the front end. Each channel is of substantially the same width throughout its length. The sides of the channel are parallel to each other as shown, but may be radial to the axis of the separator; or the fins may be parallel-sided. The fins and the body of the sepaator are tapered at their ends. The sides of the fins taper in width from rear to front. The cylinder is heated by electrical resistances 19, 20, 21, and temperature indicators 22, 23, such as thermocouples, are provided.

47. 发明专利

GB663508A Gear shaping machine with eccentric cutter relief 未知
公开(公告)号：GB663508A
公开(公告)日：1951-12-19
申请号：GB3247449
申请日：1949-12-19
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F23/12
摘要： 663,508. Gear-cutting. FELLOWS GEAR SHAPER CO. Dec. 19, 1949 [Feb. 9, 1949], No. 32474/49. Class 83 (iii). A gear-shaping machine comprises a back-off sleeve 15 having one internal bearing 18 eccentric to, and another 17 concentric with, its axis of rotation, and a tool-spindle 10 mounted for rotation and reciprocation in the eccentric bearing 18, the reciprocating means for the spindle comprising an oscillating gear sector 31 and a rack section 33 formed on a sleeve 32 mounted in the concentric bearing 17 in the sleeve 15. The spindle is rotated by a wormwheel 21 and is controlled by the usual straight or helical guides 22, 23. The centre a 2 of the sleeve 32 is displaced from the centre a 1 of the spindle in the direction of the line of cutter-and-work centres A-A. Thus, oscillation of the sleeve 15 about its centre a causes the spindle to be backed away from the work, its centre travelling along an arc a 1 -a 2 . The oscillation is imparted by a cam 39 which rocks a sector lever 41 against the force of a spring 50 coacting with a rack-plunger 46 contained between plugs 48, 49. When cutting internal gears, the plugs 48, 49, plunger 46 and sector 41 are reversed in position. To compensate for the additional rotation imposed on the cutter spindle by the rolling of its driving worm-wheel 21 on the driving worm 57, Fig. 5, a cam 75 rocks an arm carrying a planet 63 engaging a driven wheel 65 on the worm-shaft. This corrective movement also prevents rubbing if the cutter and work-piece are in overlapping relationship. In a modification, the sleeve 32 and the sector 31 are provided with two rows of interengaging teeth.

48. 发明专利

FR975286A 未知
公开(公告)号：FR975286A
公开(公告)日：1951-03-02
申请号：FR975286D
申请日：1948-11-19
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F23/04 , B23Q7/00 , B23Q7/06 , B23Q7/10 , B27K5/02 , B65G47/08

49. 发明专利

FR946507A 未知
公开(公告)号：FR946507A
公开(公告)日：1949-06-07
申请号：FR946507D
申请日：1947-05-10
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23P15/34

50. 发明专利

GB613262A Machine for finish cutting gear teeth and analogous curved elements 未知
公开(公告)号：GB613262A
公开(公告)日：1948-11-24
申请号：GB1779646
申请日：1946-06-13
申请人： FELLOWS GEAR SHAPER CO
IPC分类号： B23F21/28
摘要： 613,262. Gear-cutting. FELLOWS GEAR SHAPER CO. June 13, 1946, No. 17796. Convention date, July 25, 1945. [Class 83 (iii)] [Also in Group XXXIV] A machine for cutting the faces of gear teeth &c. comprises a reciprocating cutter having a cutting-edge transverse to the directions of its reciprocative movement, means for supporting and rolling a work-piece along a plane which is transverse to the path of said cutting-edge and means for adjusting the cutter so as to locate its path at various inclinations to the rolling plane. The cutter c, Fig. 11, may have a crenelated cutting-edge b for finishing gear shaving cutters or a straight cutting edge for use with plain or helical spur gears. The cutter-head 10, Fig. 9, is pivotally mounted on a ram 11 which is reciprocated by an adjustable lever arm 14, Fig. 1, actuated by an adjustable connecting-rod 19 driven by an adjustable crank 20 on an independently driven shaft. The cutter c, Fig. 9, is mounted on a block 96 by means of a bolt 95 passing through a slot 119. The block 96 is adjustably mounted on the cylindrical surface 97 of a table 98 rotatable about a pivot 103 by a worm 108. The pivot 103 is carried on a base 102 which provides a circular bearing for the table 98 by means of clamp shoes 115 mounted in guides in the head 10. The ram 11 reciprocates in a housing 12, Fig. 1, which is angularly adjustable on circular guides 84 by a screw 91. The axes of the guides 84 and of the cylindrical surfaces of the blocks 96 and 102 are parallel to the rolling-plane, thus providing means in conjunction with the pivot 103, for adjusting the cutter to provide clearance at the cutting- edge and to accommodate the edge of the cutter to helical teeth of all practical helix angles. To provide for work-pieces of different diameters the housing 12 is adjustable longitudinally by a rack and pinion. The head 10, Figs. 5, 9, is provided at its lower end with a cam surface 133 which is pressed by a spring-plunger 136 against a wedge block 134 carried on a sliding rod 137 which is gripped frictionally at its lower end by spring-pressed, recessed blocks 139. Thus, on the upward stroke of the plunger, the cutter head is forced against a shoulder 141 and, on the downward stroke, the plunger 136 is urged forward to swing the head and relieve the cutter. The work-piece W is mounted on a shaft 28 rotating in bearings 29, 30 in a carriage 31 which is reciprocated along guides 32 by means of a screw 45. The screw 45 is rotated by a feed motor 35, Fig. 12, driving a worm-wheel 39 which is rotatably mounted on a shaft 40 and which carries a clutch plate 41 meshing with a similar plate 42 splined on the shaft 40, thus rotating a pinion 43, crown wheel 44 and hence the screw 45. At the end of the feed-stroke a dog 163, Fig. 1, on the carriage trips a switch 160 on the bed which cuts out the motor 35, disengages the clutch 42 by a solenoid 62 and lever arms 64 and closes the circuit of a motor 46 which drives the shaft 40 direct in a direction to reverse the carriage. At the end of the return stroke a limit switch 161 is operated and the feed motor is again set in operation, after a suitable interval to allow for indexing the work. The shaft 40 also rotates the workpiece W through the gear train 50, 51, 52, 53, 55, 57, 59, 60 and a worm 48 and worm-wheel 49. The work is indexed manually by a plunger 56 mounted on the wheel 55 which engages a dividing-head 54 carried on the wheel 53. The gears 50-53 may be changed so that the speed of the worm 48 may be adjusted when the pitch-circles of the wheel 49 and work-piece differ. The carriage may be manually adjusted by a shaft 72 carrying a pinion 73 which is pushed into engagement with teeth on the periphery of the crown-wheel 44. Adjustments for wear. The screw 45, Fig. 7, runs in two nuts, one of which, 142, is fixed, and the other, 143, may be rotated and clamped to take up slackness. The shaft 28 is forced against its bearing 29 by means of a torque shoe 147 which is pressed against the shaft by a spring 156 bearing on an arm 151 (see Group XXXIV). The worm 48 is carried in a bearing bracket 481 which may be adjusted vertically to take up back-lash in the wheel 49.

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