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61. 发明专利

CA313493A SAFETY DEVICE 未知
公开(公告)号：CA313493A
公开(公告)日：1931-07-21
申请号：CA313493D
申请人： JEFFREY MFG CO
发明人： LEVIN NILS D

62. 发明专利

CA308546A PULVERIZING MACHINE 未知
公开(公告)号：CA308546A
公开(公告)日：1931-02-10
申请号：CA308546D
申请人： JEFFREY MFG CO
发明人： ARMSTRONG WALTER J

63. 发明专利

AT116449B 未知
公开(公告)号：AT116449B
公开(公告)日：1930-02-25
申请号：AT116449D
申请日：1928-10-08
申请人： JEFFREY MFG CO

64. 发明专利

DE490411C 未知
公开(公告)号：DE490411C
公开(公告)日：1930-01-30
申请号：DEJ0025745
申请日：1925-02-13
申请人： JEFFREY MFG CO
IPC分类号： E21C25/68

65. 发明专利

GB323369A Improvements in or relating to coal cutting or like machines 未知
公开(公告)号：GB323369A
公开(公告)日：1930-01-02
申请号：GB18029
申请日：1929-01-02
申请人： JEFFREY MFG CO
IPC分类号： E21C31/10
摘要： 323,369. British Jeffrey-Diamond, Ltd., (Jeffrey Manufacturing Co.). Jan. 2, 1929. Coal-cutting machines. - A coalcutting machine comprises a key cutter 12 of the endless chain type driven by a motor 10 and carried by a rotatable plate 9 carrying a drum 37 rotatable in either direction; one or two ropes 39 are wound on the drum, the free ends being secured at 42 to the framework of the machine, whereby the plate 9 and the key cutter may be swung in either direction. The drum is driven by an eccentric 22, Figs. 3 and 5, on the shaft 17 which drives the cutter chain, the eccentric acting through links 24, 24a, connected by horizontal and vertical pivots 25, 27, , and through one of two opposed pawls 45 cooperating with opposed ratchets 43, 44, to drive worm gearing 31, 32. The pawls are controlled by a mask plate 49 adjusted through a pinion 51, Fig. 7, by a handle 53 provided with a locking pin 54. The worm shaft is provided with a brake drum 56, Figs. 7 and 10, co-operating with a brake band 57 adjusted by a screw 59 to hold the drum against rotation. The shaft 17 is connected to the cutter-chain drive-sprocket wheel 15 by an internally-toothed clutch sleeve 21. A motor 4 on the main frame of the machine drives the supporting wheels and a cable reel 6.

66. 发明专利

CA296197A CONVEYER 未知
公开(公告)号：CA296197A
公开(公告)日：1929-12-31
申请号：CA296197D
申请人： JEFFREY MFG CO
发明人： FRANCIS EARLE V

67. 发明专利

GB308134A Improvements in and connected with coal mining machines 未知
公开(公告)号：GB308134A
公开(公告)日：1929-03-21
申请号：GB2133028
申请日：1928-07-23
申请人： JEFFREY MFG CO
IPC分类号： E21C25/66
摘要： 308,134. Tugwood, R. J., (Jeffrey Manufacturing Co.). July 23, 1928. Drilling - machines. - A truck 1, carrying a coalcutting machine and capable of being driven from a motor 4, is provided with lateral plates 65 supporting a channel bar 64 on which one or more brackets 66 are pivoted on vertical axes ; a hollow bar 67 is slidable in each bracket, antifriction rollers being provided therefor and a locking screw holding the bar in adjusted position, while a rod 70 is fixed to the bar and engaged with one of a series of apertures 71 at the front of the truck to act as a brace. A pivoted yoke 74 at the end of each bar 67 provides a universal support for a drilling-machine comprising an electric motor 76 controlled by a switch 78 on the bracket 66; a threaded shaft 79, carrying a drill 81 extends through the motor and is rotated thereby, while a divided feed-nut 82, Fig. 12, co-operates with the shaft 79 to advance the drill. The feed-nut has a cylindrical extension 84 rotatably supported on an extension 85 of the casing of the motor 76, and a brake hand 86, controlled by a screw 87, encircles the extension 84 to control rotation of the feed-nut. The drills may be set parallel to the line of advance of the truck, the feed-nuts tightened to clamp the shafts 79 and the brake-bands 86 released, the drills then being fed in to the coal by the advance of the truck to drill the coal simultaneously with the kerf-cutting operation.

68. 发明专利

AT110624B 未知
公开(公告)号：AT110624B
公开(公告)日：1928-09-25
申请号：AT110624D
申请日：1926-08-30
申请人： JEFFREY MFG CO

69. 发明专利

DE459192C 未知
公开(公告)号：DE459192C
公开(公告)日：1928-04-30
申请号：DEJ0025186
申请日：1924-09-20
申请人： JEFFREY MFG CO
IPC分类号： B02C13/282

70. 发明专利

AT108168B 未知
公开(公告)号：AT108168B
公开(公告)日：1927-12-10
申请号：AT108168D
申请日：1924-09-23
申请人： JEFFREY MFG CO

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