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1. 发明专利

GB1241608A A CONTROL SYSTEM SUITABLE FOR A DOCUMENT SORTING MACHINE 未知
公开(公告)号：GB1241608A
公开(公告)日：1971-08-04
申请号：GB4878668
申请日：1968-10-15
申请人： UNIVERSAL BUSINESS MACHINES
发明人： SWARTZ RICHARD L
IPC分类号： G06K13/12 , B07C3/00 , B07C3/08 , G06K17/00
摘要： 1,241,608. Letter sorting. UNIVERSAL BUSINESS MACHINES Inc. 15 Oct., 1968 [27 Oct., 1967], No. 48786/68. Heading B8A. A control system for selectively operating gates distributed along a trackway in a letter sorting machine comprises a plurality of signal stores (DCA decade relays, and DA digit relays; and DCB decade relays and DB digit relays; (decade relays are on left-hand side of Figs. 3A and 3C; digit relays are along the top of Figs. 3A and 3B) adapted to store signals representative of any of the gates, input means (keys 0-9, Figs. 3A and 3C) designating the different gates, means operatively connecting input means to the stores, means for cycling the input means to each of the stores in turn so that signals designating selected gates are entered successively into alternate stores, a plurality of electromagnetic actuators (solenoids 00, 01 ... 99, Figs. 3A-3D) for operating the gates respectively, and means (relays 1AC- 10AC, Figs. 3B and 3D, and associated circuitry) for cyclically connecting the stores to the actuators so that at any given time, one of the stores has complete control over all the actuators, and means (mechanical switching mechanism (Fig. 3E) and circuitry of Figs. 3A-3D) operatively connected to the actuators to energize them for opening the gates in response to information entered in the stores. General description of circuitry.-As described, there are 100 gates having respective operating solenoids 00 to 99. There are nine keys 0-9, and in routing a letter to its destined compartment, e.g. controlled by gate 61, the first digit 6 corresponding to the tens is keyed, and then the digit 1 corresponding to the units. The first digit keyed, causes power to be applied to one of an appropriate pair of a series of so-called " decade " relay DCOA; DCOB: to DC9A, DC9B. If power is routed to the A relay of the pair, on keying the code of the next letter it will be the B relay that is energized and so on. When the second digit is keyed, power is routed to one of the appropriate pair of a series of so-called " digit " relays DOA, DOB, to D9A, D9B. If it was the A decade relay that was energized, on keying the first digit, the A digit relay will be similarly energized. This arrangement of A and B stores enables the code to be keyed corresponding to a following letter, while the first letter is proceeding along the track (not shown) between the keyboard and the designated compartment. However, to ensure that keying cannot be commenced too soon, relays KR, AB (top L.H. corner of Fig. 3A) (which control the application of power to the keys 0-9) are connected via a line 38 to two parallel power lines T1A, T1B. Line T1A includes in series the contacts 1a of the digit relays D1A-D9A and line T2A includes in series the contacts of the digit relays D1BD9B. Thus, each time the second digit of a code is keyed, the relays AB and KR are deenergized and the keys are isolated until these relays are re-energized by the operation of either of cam-operated switches C3S or C4S in lines T1A and T1B. Cam - operated switching mechanism.-The switches C3S and C4S are also shown in Fig. 3E, together with their operating cams C3 and C4, on a cam-shaft CSa which is rotated at half the speed of a cam-shaft SH. The latter is rotated in a one revolution cycle by a one-revolution clutch ORC, energized by a solenoid CL (Fig. 3E). The latter is energized by power supplied from a line S1G (shown both in Fig. 3C and Fig. 3E). Power is supplied into this line by the closure of contacts 3a of relay AB. Thus, the cycle of shafts CS and CSa commences after the keying of the second code digit. The alternate selection of the A and B stores (i.e. the A or B relays of the " decade " and " digit " relays) is effected by the operation of relays 1AC to 10AC (Figs. 3B, 3D). These are energized or deenergized by a switch C5S operated by a cam C on the shaft CSa. Thus these relays by switching on or off, cause a change between A and B stores twice every rotation of shaft CSa, and therefore once during each cycle of the clutch ORC. Power on the line SIG also initiates the operation of a vacuum pick-up (see relays Pu Pus, Fig. 3E) for transferring the letter (the code of which has just been keyed) to the trackway. Arrangement of bins.-The 100 bins 00 to 99 are arranged in primary sections P1, P2 and secondary sections S1 S2 (Fig. 2), according to their distance along the trackway from the keying operator. Each solenoid in section P1 is connected directly to a return power line T2, so that it is opened immediately the other connection to the solenoid is energized via the switches activated by the decade and digit relays as previously described. A progressive delay is applied, however, to the operating of the solenoids corresponding to gates in the P2 sections (otherwise a letter previously keyed might be received by a gate opening prematurely in respect of a following letter). Thus, solenoids in the P2 section, e.g. 09, are connected to a return line F which up to a certain point in the cycle of the shaft CS (see phase diaphragm, Fig. 5) is connected by a switch C2S to a lowpower return-line Ra. Thus at about 180 degrees of rotation of the clutch ORC, initiated at the end of keying the letter, switch C2S is operated to connect line F to line T2 and so apply full power to the solenoid 09. The latter operates in concert with the solenoid 34 since the latter controls a channel leading to bins 09 and 34 is opened by closure of a contact 09a connected with the armature of solenoid 09. All the solenoids of the bins in the S2 section have their return power connection through a line R. This is connected through a limit switch M1S to line Ra and a change-over switch M2S which is operated by the passage of a letter in the S2 section of the trackway. The letter thus operates M2S to apply full voltage to open the gate of its destined bin. M1S is operated by the letter as it enters the S1 section so as to close any bin in the S2 section, left open from a previous coding. Keying operations for special circumstances.- A key RPK controlling a relay RP (Fig. 3C), is pressed in the case of a run of letters having the same coding. This causes the letters to be cycled alternately through the A and B stores. A key CRK is pressed in order to clear the circuit when an erroneous keying operation has been carried out. A key RJK is pressed in respect of a letter carrying a code which does not lie in the range of the machine. Such a letter is then carried along the trackway to a reject bin.

2. 发明专利

ES351899A1 SISTEMA DE CONTROL DE MULTIPLES MULTIDIGITO PARA UNA MAQUI-NA DE CLASIFICAR DOCUMENTOS. 未知
公开(公告)号：ES351899A1
公开(公告)日：1969-07-01
申请号：ES351899
申请日：1968-03-22
申请人： UNIVERSAL BUSINESS MACHINES
IPC分类号： G06K13/12 , B07C3/00 , B07C3/08 , G06K17/00 , G05B

3. 发明专利

DE1117142B 未知
公开(公告)号：DE1117142B
公开(公告)日：1961-11-16
申请号：DEU0005083
申请日：1958-01-25
申请人： UNIVERSAL BUSINESS MACHINES
发明人： RIVES WILLIAM H
IPC分类号： B65H3/52

4. 发明专利

GB843513A Improvements relating to guideway for document sorting machines 未知
公开(公告)号：GB843513A
公开(公告)日：1960-08-04
申请号：GB3297857
申请日：1957-10-22
申请人： UNIVERSAL BUSINESS MACHINES
发明人： RIVES WILLIAM H
IPC分类号： G06K13/05
摘要： 843,513. Sorting sheet-like articles. UNIVERSAL BUSINESS MACHINES Inc. Oct. 22, 1957, No. 32978/57. Class 78 (1). A guideway for a machine for sorting documents such as cheques, vouchers, receipts and paper money comprises a pair of parallel rails 1 with driving rollers 2 mounted therebetween at regular intervals, a plurality of unitary guideway sections 6 removably mounted on the rails 1 between each pair of rollers 2 and each comprising a pair of side walls 7, a substantially continuous floor 12, and presser rolls 19, 20 mounted to engage the rollers 2. The rollers 2 are made of any material having a low coefficient of friction, e.g. steel, but preferably from a laminated reinforced phenolic material. The rollers are all driven in the same direction by belts from a line shaft. Each section 6 has horizontal bars 4 secured to the outer faces of the walls 7 and detachably connected to the rails 1 by screws. The walls are spaced by tie-rods 8. Double wall partition members 9 are supported between the walls 7 by transverse rods 10 and engage the upper ends of the walls 11 of a series of compartments. The entrances to the compartments are closed normally by pivoted members 12, but any one of them can be raised to deflect a document into a compartment by turning its pivot 13 by means of electrically-operated mechanism. A horizontal cover-plate 15 is pivotally mounted above the members 12 on a transverse shaft 17 mounted in the walls. Deflector plates 16 on the lower face of the plate 15 are disposed so that when a member 12 is raised, its leading edge is behind and above the lower edge of the corresponding plate 16. The rollers 19, 20 are mounted on a shaft 21 journalled in a bearing 22. The midpoint of the bearing is secured to one end of a member 23, the other end of which is pivoted to a frame 18 mounted on the plate 15. The bearing is connected to the plate by a tensionspring 24 which holds the shaft 21 parallel to the axis of the rollers 2. The rollers 19, 20 have an edge portion of rubber or other material having a high coefficient of friction. The end of each shaft 17 is bent at 17a and connected to an actuating bar 25 by longitudinal movement of which each plate 15 may be turned to an inclined position. A toggle 26 holds the bar 25 in the position in which the plates 15 are horizontal.

5. 发明专利

FR1202178A 未知
公开(公告)号：FR1202178A
公开(公告)日：1960-01-08
申请号：FR1202178D
申请日：1958-02-14
申请人： UNIVERSAL BUSINESS MACHINES
IPC分类号： B65H3/06

6. 发明专利

FR1203526A 未知
公开(公告)号：FR1203526A
公开(公告)日：1960-01-19
申请号：FR1203526D
申请日：1958-02-07
申请人： UNIVERSAL BUSINESS MACHINES
IPC分类号： G07D11/00

7. 发明专利

DE1805495A1 未知
公开(公告)号：DE1805495A1
公开(公告)日：1969-05-14
申请号：DE1805495
申请日：1968-10-26
申请人： UNIVERSAL BUSINESS MACHINES
IPC分类号： G06K13/12 , B07C3/00 , B07C3/08 , G06K17/00 , B07C
摘要： 1,241,608. Letter sorting. UNIVERSAL BUSINESS MACHINES Inc. 15 Oct., 1968 [27 Oct., 1967], No. 48786/68. Heading B8A. A control system for selectively operating gates distributed along a trackway in a letter sorting machine comprises a plurality of signal stores (DCA decade relays, and DA digit relays; and DCB decade relays and DB digit relays; (decade relays are on left-hand side of Figs. 3A and 3C; digit relays are along the top of Figs. 3A and 3B) adapted to store signals representative of any of the gates, input means (keys 0-9, Figs. 3A and 3C) designating the different gates, means operatively connecting input means to the stores, means for cycling the input means to each of the stores in turn so that signals designating selected gates are entered successively into alternate stores, a plurality of electromagnetic actuators (solenoids 00, 01 ... 99, Figs. 3A-3D) for operating the gates respectively, and means (relays 1AC- 10AC, Figs. 3B and 3D, and associated circuitry) for cyclically connecting the stores to the actuators so that at any given time, one of the stores has complete control over all the actuators, and means (mechanical switching mechanism (Fig. 3E) and circuitry of Figs. 3A-3D) operatively connected to the actuators to energize them for opening the gates in response to information entered in the stores. General description of circuitry.-As described, there are 100 gates having respective operating solenoids 00 to 99. There are nine keys 0-9, and in routing a letter to its destined compartment, e.g. controlled by gate 61, the first digit 6 corresponding to the tens is keyed, and then the digit 1 corresponding to the units. The first digit keyed, causes power to be applied to one of an appropriate pair of a series of so-called " decade " relay DCOA; DCOB: to DC9A, DC9B. If power is routed to the A relay of the pair, on keying the code of the next letter it will be the B relay that is energized and so on. When the second digit is keyed, power is routed to one of the appropriate pair of a series of so-called " digit " relays DOA, DOB, to D9A, D9B. If it was the A decade relay that was energized, on keying the first digit, the A digit relay will be similarly energized. This arrangement of A and B stores enables the code to be keyed corresponding to a following letter, while the first letter is proceeding along the track (not shown) between the keyboard and the designated compartment. However, to ensure that keying cannot be commenced too soon, relays KR, AB (top L.H. corner of Fig. 3A) (which control the application of power to the keys 0-9) are connected via a line 38 to two parallel power lines T1A, T1B. Line T1A includes in series the contacts 1a of the digit relays D1A-D9A and line T2A includes in series the contacts of the digit relays D1BD9B. Thus, each time the second digit of a code is keyed, the relays AB and KR are deenergized and the keys are isolated until these relays are re-energized by the operation of either of cam-operated switches C3S or C4S in lines T1A and T1B. Cam - operated switching mechanism.-The switches C3S and C4S are also shown in Fig. 3E, together with their operating cams C3 and C4, on a cam-shaft CSa which is rotated at half the speed of a cam-shaft SH. The latter is rotated in a one revolution cycle by a one-revolution clutch ORC, energized by a solenoid CL (Fig. 3E). The latter is energized by power supplied from a line S1G (shown both in Fig. 3C and Fig. 3E). Power is supplied into this line by the closure of contacts 3a of relay AB. Thus, the cycle of shafts CS and CSa commences after the keying of the second code digit. The alternate selection of the A and B stores (i.e. the A or B relays of the " decade " and " digit " relays) is effected by the operation of relays 1AC to 10AC (Figs. 3B, 3D). These are energized or deenergized by a switch C5S operated by a cam C on the shaft CSa. Thus these relays by switching on or off, cause a change between A and B stores twice every rotation of shaft CSa, and therefore once during each cycle of the clutch ORC. Power on the line SIG also initiates the operation of a vacuum pick-up (see relays Pu Pus, Fig. 3E) for transferring the letter (the code of which has just been keyed) to the trackway. Arrangement of bins.-The 100 bins 00 to 99 are arranged in primary sections P1, P2 and secondary sections S1 S2 (Fig. 2), according to their distance along the trackway from the keying operator. Each solenoid in section P1 is connected directly to a return power line T2, so that it is opened immediately the other connection to the solenoid is energized via the switches activated by the decade and digit relays as previously described. A progressive delay is applied, however, to the operating of the solenoids corresponding to gates in the P2 sections (otherwise a letter previously keyed might be received by a gate opening prematurely in respect of a following letter). Thus, solenoids in the P2 section, e.g. 09, are connected to a return line F which up to a certain point in the cycle of the shaft CS (see phase diaphragm, Fig. 5) is connected by a switch C2S to a lowpower return-line Ra. Thus at about 180 degrees of rotation of the clutch ORC, initiated at the end of keying the letter, switch C2S is operated to connect line F to line T2 and so apply full power to the solenoid 09. The latter operates in concert with the solenoid 34 since the latter controls a channel leading to bins 09 and 34 is opened by closure of a contact 09a connected with the armature of solenoid 09. All the solenoids of the bins in the S2 section have their return power connection through a line R. This is connected through a limit switch M1S to line Ra and a change-over switch M2S which is operated by the passage of a letter in the S2 section of the trackway. The letter thus operates M2S to apply full voltage to open the gate of its destined bin. M1S is operated by the letter as it enters the S1 section so as to close any bin in the S2 section, left open from a previous coding. Keying operations for special circumstances.- A key RPK controlling a relay RP (Fig. 3C), is pressed in the case of a run of letters having the same coding. This causes the letters to be cycled alternately through the A and B stores. A key CRK is pressed in order to clear the circuit when an erroneous keying operation has been carried out. A key RJK is pressed in respect of a letter carrying a code which does not lie in the range of the machine. Such a letter is then carried along the trackway to a reject bin.

8. 发明专利

CA621237A DOCUMENT FEEDING MACHINE 未知
公开(公告)号：CA621237A
公开(公告)日：1961-05-30
申请号：CA621237D
申请人： UNIVERSAL BUSINESS MACHINES
发明人： RIVES WILLIAM H

9. 发明专利

GB848023A Improvements relating to document feeding machine 未知
公开(公告)号：GB848023A
公开(公告)日：1960-09-14
申请号：GB3297757
申请日：1957-10-22
申请人： UNIVERSAL BUSINESS MACHINES
发明人： RIVES WILLIAM H
IPC分类号： B65H3/52 , G03B13/20 , G06K13/16
摘要： 848,023. Feeding sheets. UNIVERSAL BUSINESS MACHINES Inc. Oct. 22, 1957, No. 32977/57. Class 100(1) Sheet-separators; feed rollers:-In apparatus for separating sheets from a pile and including means for ensuring that only one sheet is separated at each operation, the sheets 1, such as cheques, vouchers, or paper money, are separated sequentially from the top of a pile by a rubber &c. roller 3 on a belt-driven shaft 4 mounted in a housing 6 secured on a shaft 9 which can be rocked in bearings in frame members 10a, 10b. When the shaft 9 is rocked about its axis, the rotating roller 3 is swung about that axis either into contact with the top sheet of the pile or away therefrom. Each separated sheet is fed to a pair of steel rollers 11a, 11b on a beltdriven shaft 11 mounted in fixed bearings and rotating in the same direction as the roller 3. A rubber &c. roller 12 co-operates with the rollers 11a, 11b and buckles the sheet, and is driven in the same direction as the latter rollers so that it tends to return the sheet to the pile: the roller 12 thus prevents two superposed sheets being separated from the pile. The shaft 13 of the roller 12 is belt-driven, and is mounted in a housing 15 which is pivoted by spigots 18a in a fixed frame 18, whereby, when the housing is rocked about the spigots, the roller 12 can be moved towards or away from the rollers 11a, 11b. The raising and lowering of the rollers 3 and 12 is controlled from a keyboard control 32 which can energise a solenoid 30 to cause a power-driven clutch 28 to rotate a shaft 31 through one complete revolution. A cam 34 on the shaft 31 is adapted to rock a lever 46 which is connected to the housing 15. A second cam 33 on the shaft 31 is adapted to rock a lever 41, pivoted at 41a, which is connected by a link 39a to an arm 39 freely mounted on the shaft 9. The arm 39 overlies a lateral projection on an arm 35, secured to the shaft 9, which is urged upwardly by a spring 38 so that the roller 3 is urged towards the pile of sheets 1. The spring 38 keeps the follower 43 on the lever 41 in contact with the cam 33 and, on rotation of the cam, causes the lever 41 to turn the arm 39 and shaft 9 in a counterclockwise direction to press the roller 3 on the sheet pile: further rotation of the cam causes the shaft 9 to turn clockwise to raise the roller 3. An adjustment screw 40 can alter the relative positions of the arms 35, 39, and therefore vary the amount of time that the roller 3 is in contact with the sheet pile. Pile tables:-The pile of sheets 1 is contained within a box (not shown), has a transparent hold-down plate 2 resting on top and cut away at 2a to allow access to the separator roller 3, and rests on a platform la which is raised automatically by known mechanism 21 controlled by a switch 22 actuated by a feeler finger 23 adapted to engage the plate 2. The finger 23 is carried by a rotatable disc 24a which is urged in a direction to press the finger on the pile plate 2 by a spring 25 attached to the end of the rocker lever 41. The movements of the lever 41 are arranged so that the tension of the spring 25 is relieved, and the pressure of the finger 23 on the top of the sheet pile relaxed, when the roller 3 is lowered on top of the sheet pile for sheet separation. The shaft 9 may be rotated by a hand-lever 27 to lift the roller 3 through about 90 degrees to allow the sheet pile to be replenished: the feeler 23 is also raised during this operation by means of an arm 48 secured to the shaft and having a pin 50 engaging an arcuate slot in a sector plate 47 secured on the shaft 9 and connected by a spring 51 to the feeler disc 24a.

10. 发明专利

SE350710B 未知
公开(公告)号：SE350710B
公开(公告)日：1972-11-06
申请号：SE1447768
申请日：1968-10-25
申请人： UNIVERSAL BUSINESS MACHINES
发明人： SWARTZ R
IPC分类号： B07C3/00 , G06K13/12 , B07C3/08 , G06K17/00 , B07C3/06
摘要： 1,241,608. Letter sorting. UNIVERSAL BUSINESS MACHINES Inc. 15 Oct., 1968 [27 Oct., 1967], No. 48786/68. Heading B8A. A control system for selectively operating gates distributed along a trackway in a letter sorting machine comprises a plurality of signal stores (DCA decade relays, and DA digit relays; and DCB decade relays and DB digit relays; (decade relays are on left-hand side of Figs. 3A and 3C; digit relays are along the top of Figs. 3A and 3B) adapted to store signals representative of any of the gates, input means (keys 0-9, Figs. 3A and 3C) designating the different gates, means operatively connecting input means to the stores, means for cycling the input means to each of the stores in turn so that signals designating selected gates are entered successively into alternate stores, a plurality of electromagnetic actuators (solenoids 00, 01 ... 99, Figs. 3A-3D) for operating the gates respectively, and means (relays 1AC- 10AC, Figs. 3B and 3D, and associated circuitry) for cyclically connecting the stores to the actuators so that at any given time, one of the stores has complete control over all the actuators, and means (mechanical switching mechanism (Fig. 3E) and circuitry of Figs. 3A-3D) operatively connected to the actuators to energize them for opening the gates in response to information entered in the stores. General description of circuitry.-As described, there are 100 gates having respective operating solenoids 00 to 99. There are nine keys 0-9, and in routing a letter to its destined compartment, e.g. controlled by gate 61, the first digit 6 corresponding to the tens is keyed, and then the digit 1 corresponding to the units. The first digit keyed, causes power to be applied to one of an appropriate pair of a series of so-called " decade " relay DCOA; DCOB: to DC9A, DC9B. If power is routed to the A relay of the pair, on keying the code of the next letter it will be the B relay that is energized and so on. When the second digit is keyed, power is routed to one of the appropriate pair of a series of so-called " digit " relays DOA, DOB, to D9A, D9B. If it was the A decade relay that was energized, on keying the first digit, the A digit relay will be similarly energized. This arrangement of A and B stores enables the code to be keyed corresponding to a following letter, while the first letter is proceeding along the track (not shown) between the keyboard and the designated compartment. However, to ensure that keying cannot be commenced too soon, relays KR, AB (top L.H. corner of Fig. 3A) (which control the application of power to the keys 0-9) are connected via a line 38 to two parallel power lines T1A, T1B. Line T1A includes in series the contacts 1a of the digit relays D1A-D9A and line T2A includes in series the contacts of the digit relays D1BD9B. Thus, each time the second digit of a code is keyed, the relays AB and KR are deenergized and the keys are isolated until these relays are re-energized by the operation of either of cam-operated switches C3S or C4S in lines T1A and T1B. Cam - operated switching mechanism.-The switches C3S and C4S are also shown in Fig. 3E, together with their operating cams C3 and C4, on a cam-shaft CSa which is rotated at half the speed of a cam-shaft SH. The latter is rotated in a one revolution cycle by a one-revolution clutch ORC, energized by a solenoid CL (Fig. 3E). The latter is energized by power supplied from a line S1G (shown both in Fig. 3C and Fig. 3E). Power is supplied into this line by the closure of contacts 3a of relay AB. Thus, the cycle of shafts CS and CSa commences after the keying of the second code digit. The alternate selection of the A and B stores (i.e. the A or B relays of the " decade " and " digit " relays) is effected by the operation of relays 1AC to 10AC (Figs. 3B, 3D). These are energized or deenergized by a switch C5S operated by a cam C on the shaft CSa. Thus these relays by switching on or off, cause a change between A and B stores twice every rotation of shaft CSa, and therefore once during each cycle of the clutch ORC. Power on the line SIG also initiates the operation of a vacuum pick-up (see relays Pu Pus, Fig. 3E) for transferring the letter (the code of which has just been keyed) to the trackway. Arrangement of bins.-The 100 bins 00 to 99 are arranged in primary sections P1, P2 and secondary sections S1 S2 (Fig. 2), according to their distance along the trackway from the keying operator. Each solenoid in section P1 is connected directly to a return power line T2, so that it is opened immediately the other connection to the solenoid is energized via the switches activated by the decade and digit relays as previously described. A progressive delay is applied, however, to the operating of the solenoids corresponding to gates in the P2 sections (otherwise a letter previously keyed might be received by a gate opening prematurely in respect of a following letter). Thus, solenoids in the P2 section, e.g. 09, are connected to a return line F which up to a certain point in the cycle of the shaft CS (see phase diaphragm, Fig. 5) is connected by a switch C2S to a lowpower return-line Ra. Thus at about 180 degrees of rotation of the clutch ORC, initiated at the end of keying the letter, switch C2S is operated to connect line F to line T2 and so apply full power to the solenoid 09. The latter operates in concert with the solenoid 34 since the latter controls a channel leading to bins 09 and 34 is opened by closure of a contact 09a connected with the armature of solenoid 09. All the solenoids of the bins in the S2 section have their return power connection through a line R. This is connected through a limit switch M1S to line Ra and a change-over switch M2S which is operated by the passage of a letter in the S2 section of the trackway. The letter thus operates M2S to apply full voltage to open the gate of its destined bin. M1S is operated by the letter as it enters the S1 section so as to close any bin in the S2 section, left open from a previous coding. Keying operations for special circumstances.- A key RPK controlling a relay RP (Fig. 3C), is pressed in the case of a run of letters having the same coding. This causes the letters to be cycled alternately through the A and B stores. A key CRK is pressed in order to clear the circuit when an erroneous keying operation has been carried out. A key RJK is pressed in respect of a letter carrying a code which does not lie in the range of the machine. Such a letter is then carried along the trackway to a reject bin.

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