Drive release and positive stop device

Claim 2

A gear drive for tap-changing regulating transformers including a. a driving shaft (12,18); b. a driven shaft (13); c. a gear (15) arranged in coaxial relation to, and rotatable relative to, said driven shaft (13) and driven by said driving shaft (12,18), said gear (15) having latching means (20) projecting axially outwardly from one of the end surfaces thereof; d. a hub member (221) fixedly mounted on said driven shaft (13) for joint rotation with said driven shaft (13) and being provided with abutment surfaces (220); e. a latching element (21) arranged between said gear (15) and said hub member (22) cooperating with said latching means (20) of said gear (15) and including means (21,23) for transmitting torques from said gear (15) to both said hub member (221) and driven shaft (13), said latching element (21) being further provided with an abutment means (250); f. a coupling member (26) loosely mounted on said driven shaft (13) and pivotable relative to said driven shaft (13), said coupling member (26) having abutment means (30) arranged to engage said abutment means (250) of said latching element (21) and to be engaged by said abutment surfaces (220) of said hub member (221); and g. normally ineffective latching means (31,29) for said coupling member (26) movable from an ineffective position thereof to an effective position thereof to restrain rotary movement of said coupling member (26) and to restrain rotary movement of both said hub member (221) and said driven shaft (13) upon engagement of said abutment means (30) of said coupling member (26) by one of said abutment surfaces (220) of said hub member (221).

Claim 3

A gear drive as specified in claim 1 wherein said gear (15) is a dual function gear provided with spur gear means (151) and with bevel gear means (152), one of said gear means meshing with motor driven gear (16) and the other of said gear means meshing with a manually driven gear (17).

Claim 4

A gear drive as specified in claim 2 wherein said spur gear means (151) mesh with a motor driven spur gear (16) and wherein said bevel gear means (152) mesh with a manually operable bevel gear (17).

Claim 5

A gear drive as specified in claim 1 wherein said latching element (21) is substantially annular, wherein said driven shaft (13) projects through the opening defined by said annular latching element (21), and wherein said hub member (221) has an outer diameter of such size as to cause cooperative engagement of said hub member (221) and of the radially inner edge of said annular latching element (21) upon engagement by said abutment means (30) of said coupling member (26) of one of said abutment surfaces (220) of said hub member (221).

Claim 6

A gear drive as specified in claim 1 wherein said abutment means (250) of said latching element (21) is formed by a hollow cylindrical projection (250) housing a spring-biased brake mechanism (24,25) including a brake block (25) frictionally engaging said one of the end surfaces of said gear (15).

Claim 7

A gear drive as specified in claim 1 wherein saiD coupling member (26) is provided with a flange (28) having a larger diameter than said coupling member, wherein said flange (28) is provided with said abutment means (30), and wherein said abutment means (30) are formed by a pair of claws.

Claim 8

A gear drive as specified in claim 1 wherein said gear (15), said hub member (221), and said latching element (21) are arranged in a gear housing (10) being closed by a cover (11) and wherein said coupling member (26) projects from the space bounded by said gear housing (10) and said cover (11) through an opening defined by said cover (11) to the space outside of said gear housing (10) and said cover (11).

Claim 9

A gear drive for tap-changing regulating transformers having a driving shaft, a driven shaft operated by said driving shaft and a coupling mechanism interposed between said driving shaft and said driven shaft, said coupling mechanism including a. a gear (15) loosely mounted on said driven shaft (13) and rotatable relative to said driven shaft (13), said gear (15) having a torque-transmitting projection (20) extending axially outwardly from one of the end surfaces thereof; b. an annular latching element (21) having a pair of latching surfaces (210) cooperating with said projection (20) of said gear (15) to transmit torques from said gear (15) to said latching element (21), said latching element (21) being further provided with an abutment means (250) projecting axially outwardly from said latching element; c. a crank (22) mounted on said driven shaft (13) for joint rotation with said driven shaft (13), said crank including fulcrum means (23) pivotally connecting said crank (22) to said latching element (21), and said crank further including a pair of substantially radially oriented abutment surfaces (220); d. a coupling member (26) loosely mounted on said driven shaft (13) and pivotable relative to said driven shaft (13), said coupling member (26) having a pair of dogs (30) arranged to engage said abutment means (250) of said latching element (21) and to be engaged by said abutment surfaces (220) of said crank (22); and e. normally ineffective latching means (31,29) for said coupling member (26) movable from an ineffective position thereof to an effective position thereof to restrain rotary movement of said coupling member (26) and to further restrain rotary movement of both said crank (22) and said driven shaft (13) upon engagement of one of said abutment surfaces (220) of said crank (22) by one of said pair of dogs (30) of said coupling member (26).

Claim 10

A gear drive for tap-changing regulating transformers having a driving shaft, a driven shaft operated by said driving shaft and a coupling mechanism interposed between said driving shaft and said driven shaft, said coupling mechanism including a. a gear (15) loosely mounted on said driven shaft (13) and rotatable relative to said driven shaft (13), said gear (15) having a torque-transmitting projection (20) extending axially outwardly from one of the end surfaces thereof; b. an annular latching element (21) having a pair of latching surfaces (210) cooperating with said projection (20) of said gear (15) to transmit torques from said gear (15) to said latching element (21), said latching element (21) being further provided with an abutment means (250) projecting axially outwardly from said latching element; c. a crank (22) mounted on said driven shaft (13) for joint rotation with said driven shaft (13), said crank including fulcrum means (23) pivotally connecting said crank (22) to said latching element (21), and said crank further including a pair of substantially radially oriented abutment surfaces (220); d. a coupling member (26) loosely mounted on said driven shaft (13) and pivotable relative to said driven shaft (13), said coupling member (26) having a pair of dogs (30) arranged to engage said abutment means (250) of said latching element (21) and to be engaged by said abutment surfaces (220) of said crank (22); and e. normally ineffective latching means (31,29) for said coupling member (26) movable from an ineffective position thereof to an effective position thereof to restrain rotary movement of said coupling member (26) and to further restrain rotary movement of both said crank (22) and said driven shaft (13) upon engagement of one of said abutment surfaces (220) of said crank (22) by one of said pair of dogs (30) of said coupling member (26).

Claim 11

A gear drive as specified in claim 8 wherein said gear (15) is a dual function gear provided with a pair of gear means, one of said pair of gear means being a spur gear means (151) and the other of said gear means being a bevel gear means (152), and wherein one of said pair of gear means is adapted to be driven by motor means (19) and the other of said pair of gear means is adapted to be driven manually.

Claim 12

A gear drive as specified in claim 8 wherein said latching element (21) is provided with a cylindrical bore (21'') and wherein said crank (22) includes a pin (23) projecting into said bore (21'') of said latching element (21) pivotally connecting said latching element (21) and said crank (22).

Claim 13

A gear drive as specified in claim 8 wherein the inner diameter of said annular latching element (21) and the outer diameter of a hub (221) of said crank (22) mounted on said driven shaft (13) are coordinated in such a way that said hub (221) of said crank (22) engages said annular latching element (21) upon engagement of one of said pair of abutment surfaces (220) of said crank (22) by one of said pair of dogs (30) of said coupling member (26).

Claim 14

A gear drive as specified in claim 8 wherein said abutment means (250) of said annular latching element (21) is formed by a cylindrical projection extending from the side of said annular latching element (21) remote from said gear (15) and housing a biasing spring (24) and a brake block (25) biased By said spring (24) and engaging the end surface of said gear (15) adjacent said latching element (21).

Claim 15

A gear drive as specified in claim 8 wherein said coupling member (26) includes a portion of relatively small diameter provided with a latch (29) on the radially outer surface thereof and a flange portion (28) of relatively large diameter, said pair of dogs (30) projecting axially from the end surface of said flange portion (28) adjacent said crank (22).

Claim 16

A gear drive as specified in claim 13 wherein said gear (15), said latching element (21) and said flange portion (28) of said coupling member (26) are arranged within a gear housing (10) provided with a cover (11), wherein said portion of said coupling element (26) of relatively small diameter projects through said cover (11) to the outside of the space defined by said gear housing (10) and by said cover (11), and wherein said latch (29) is situated outside of said space defined by said gear housing (10) and said cover (11).

Claim 17

A gear drive as specified in claim 8 including a. a gear of relatively small diameter fixedly mounted on said driven shaft (13) for joint rotation with said driven shaft (13); b. a gear of relatively large diameter in meshing engagement with said gear of relatively small diameter, said gear of relatively large diameter being provided with a pair of angularly displaced abutment means (35); c. a lever system (33) operable by said abutment means (35) of said gear of relatively large diameter upon a predetermined number of revolutions of said driven shaft (13); and d. a latch (31) operated by said lever system (33) cooperating with said latch (29) on said radially outer surface of said portion of relatively small diameter of said coupling member (26) to arrest said coupling member (26) upon engagement of said last mentioned latch (29) by said first mentioned latch (31).

Claim 18

A gear drive for tap-changing regulating transformers including a. a driving shaft (12,18); b. a driven shaft (13); c. a gear (15) arranged in coaxial relation to and rotatable relative to said driven shaft (13) and driven by said driving shaft (12,18); d. a hub member (221) fixedly mounted on said driven shaft (13) for joint rotation with said driven shaft (13) and including a pair of abutment surfaces (220) projecting substantially radially outwardly from said driven shaft (13); e. a coupling member (26) having a surface in abutting relation with said hub member (221) and being loosely mounted on said driven shaft (13), said coupling member (26) having abutment means (30) cooperating with said abutment surfaces (220) of said hub member (221) to limit the freedom of relative rotary motion of said coupling member (26) on the one hand, and said hub member (26) and said driven shaft (13), on the other hand, f. normally ineffective latching means (31,29) for said coupling member (26) movable from an ineffective position to an effective position thereof and compelling in said effective position by positive mechanical action cessation of the rotary motion of said coupling member (26); and g. combined latching and torque-transmitting means (20,21,22,23) normally effective to transmit torques from said gear (15) to both said hub member (221) and said driven shaft (13), said combined latching and torque-transmitting means (20,21,22,23) including means (250) responsive to said cessation of said rotary motion of said coupling member (26) to render said combined latching and torque-transmitting means (20,21,22,23) ineffective to cause cessation of transmission of torques from said gear (15) to both said hub member (221) and said driven shaft (13) upon said cessation of said rotary motion of said coupling member (26).

Claim 19

A gear drive for tap-changing regulating transformers including a. a driving shaft (12,18); b. a driven shaft (13); c. a gear (15) arranged in coaxial relation to and rotatable relative to said driven shaft (13) and driven by said driving shaft (12,18); d. a hub member (221) fixedly mounted on said driven shaft (13) for joint rotation with said driven shaft (13) and including a pair of abutment surfaces (220) projecting substantially radially outwardly from said driven shaft (13); e. a coupling member (26) having a surface in abutting relation with said hub member (221) and being loosely mounted on said driven shaft (13), said coupling member (26) having abutment means (30) cooperating with said abutment surfaces (220) of said hub member (221) to limit the freedom of relative rotary motion of said coupling member (26) on the one hand, and said hub member (26) and said driven shaft (13), on the other hand, f. normally ineffective latching means (31,29) for said coupling member (26) movable from an ineffective position to an effective position thereof and compelling in said effective position by positive mechanical action cessation of the rotary motion of said coupling member (26); and g. combined latching and torque-transmitting means (20,21,22,23) normally effective to transmit torques from said gear (15) to both said hub member (221) and said driven shaft (13), said combined latching and torque-transmitting means (20,21,22,23) including means (250) responsive to said cessation of said rotary motion of said coupling member (26) to render said combined latching and torque-transmitting means (20,21,22,23) ineffective to cause cessation of transmission of torques from said gear (15) to both said hub member (221) and said driven shaft (13) upon said cessation of said rotary motion of said coupling member (26).

Claim 20

A gear drive for tap-changing regulating transformers as specified in claim 16 wherein said combined latching and torque-transmitting means include a. a substantially annular latching element (21) surrounding said driven shaft (13) and having an abutmeNt means (250) projecting axially outwardly from a plane defined by said latching element (21) and arranged to be engaged by said abutment means (30) of said coupling member (26), said latching element (21) being provided with means (21'',23,22) pivotally connecting said latching element (21) to said hub member (221), and said latching element (21) being further provided with a pair of latching surfaces (210) arranged to opposite sides of said means (21'',23,22) pivotally connecting said latching element (21) to said hub member (221), and wherein b. said gear (15) is provided with a torque-transmitting projection (20) on the end surface thereof adjacent said annular latching element (21) cooperating with said pair of latching surfaces (210) thereof.

Claim 21

A gear drive as specified in claim 18 wherein said abutment means (250) is hollow and houses a brake mechanism including a spring (24) and brake block (25) biased by said spring (24) and frictionally engaging said end surface of said gear (15) adjacent said annular latching element (21).

Claim 22

A gear drive as specified in claim 16 including a. a gear housing (10) and a cover (11) therefore having an aperture on one side thereof, said gear (15), said hub member (221) and said combined latching and torque-transmitting means (20,21,22,23) being arranged inside of the space bounded by said gear housing (10) and said cover (11), and said coupling member (26) being arranged in part inside of aid space and in part outside of said space and projecting through said aperture in said cover; and b. a mechanical power transmission (34,35,33) arranged outside of said space, said transmission being operated by one end of said driven shaft (13) projecting through said coupling member (26) to the outside of said space and said transmission (34,35, 33) controlling said normally ineffective latching means (31, 29) to render said normally ineffective latching means effective upon a predetermined number of revolutions of said driven shaft (13).

Claim 23

A gear drive for tap-changing regulating transformers including a. a driving shaft (12,18) supporting a driving gear (16,17); b. a driven shaft (13); c. a gear (15) arranged in coaxial relation to said driven shaft (13), rotatable relative to said driven shaft (13) and driven by said driving gear (16,17); d. a hub member (221) fixedly mounted on said driven shaft (13) for joint rotation with said driven shaft (13); e. a coupling member (26) loosely mounted on said driven shaft (13) in torque-transmitting relation with said hub member (221); f. cooperating abutment means (220,30) on said hub member (221) and on said coupling member (26) for limiting the amount of relative rotary motion of said hub member (221) and of said coupling member (26); g. normally ineffective latching means (31,29) for said coupling member (26) movable from an ineffective position to an effective position thereof and compelling in said effective position by positive action cessation of rotary motions of said coupling member (26) about said driven shaft (13); h. means (34,35,33) responsive to the rotary motion of said driven shaft (13) for moving said normally ineffective latching means (31,29) from said ineffective position to said effective position; i. combined latching and torque-transmitting means (20,21,22,23) interposed between said gear (15) and said hub member (221) for torque transmission from said gear (15) to said hub member (221); and j. means under the control of said coupling member (26) engaging said combined latching and torque-transmitting means (20,21,22, 23) upon said cessation of rotary motion of said coupling member (26) about said driven shaft (13) and thereby unlatching said combined latching and torque-transmitting means (20,21,22, 23) to preclude further torque transmission from said gear (15) to said hub member (221).

Claim 24

A gear drive for tap-changing regulating transformers including a. a driving shaft (12,18) supporting a driving gear (16,17); b. a driven shaft (13); c. a gear (15) arranged in coaxial relation to said driven shaft (13), rotatable relative to said driven shaft (13) and driven by said driving gear (16,17); d. a hub member (221) fixedly mounted on said driven shaft (13) for joint rotation with said driven shaft (13); e. a coupling member (26) loosely mounted on said driven shaft (13) in torque-transmitting relation with said hub member (221); f. cooperating abutment means (220,30) on said hub member (221) and on said coupling member (26) for limiting the amount of relative rotary motion of said hub member (221) and of said coupling member (26); g. normally ineffective latching means (31,29) for said coupling member (26) movable from an ineffective position to an effective position thereof and compelling in said effective position by positive action cessation of rotary motions of said coupling member (26) about said driven shaft (13); h. means (34,35,33) responsive to the rotary motion of said driven shaft (13) for moving said normally ineffective latching means (31,29) from said ineffective position to said effective position; i. combined latching and torque-transmitting means (20,21,22,23) interposed between said gear (15) and said hub member (221) for torque transmission from said gear (15) to said hub member (221); and j. means under the control of said coupling member (26) engaging said combined latching and torque-transmitting means (20,21,22, 23) upon said cessation of rotary motion of said coupling member (26) about said driven shaft (13) and thereby unlatching said combined latching and torque-transmitting means (20,21,22, 23) to preclude further torque transmission from said gear (15) to said hub member (221).

Claim 25

A gear drive as specified in claim 20 wherein said combined latching and torque-transmitting means include a. a substantially annular latching element (21) surrounding said driven shaft (13) and having a pair of latching surfaces (210) engageable by cooperating latching surfaces (20) on said gear (15); and b. a pin (23) pivotally connecting said annular latching element (21) and said hub member (221) and wherein c. said coupling member (26) is provided with an abutment (30) arranged to engage a cooperating abutment surface (250) on said annular latching element (21) to cause disengagement of one of said pair of latching surfaces (210) of said annular latching element (21) from said cooperating latching surfaces (20) on said gear (15).

Claim 26

A gear drive as specified in claim 21 including means in the nature of a friction brake (24,25) supported by said annular latching element (21) establishing a frictional connection between said annular latching element (21) and said gear (15).