Patent GB-444643-A (GB)
Title: Means for registering the idle or the working time of machines or operatives
IPC: G07C1/08
Filed: 1934-10-04
Abstract: 444,643. Indicating and recording apparatus; transfer mechanism. ERICSSON TELEPHONES, Ltd., 67, Kingsway, London, and ENGBLOM, J. F. T., Villa Tomoana, Elm Avenue, Beeston, Nottingham, Oct. 4, 1934, No. 28390. [Classes 106 (i) and 106 (iv)] Means for registering the idle time or the working time of a plurality of machines or operatives comprises a relay associated with each machine and energized upon the operation of the machine, the relay then being locked for a certain period of time, the number of relays operated, or not operated, at the end of every period being counted. If desired, the relay when operated may complete a circuit which causes a mark to be made once per minute on the strip of the recorder described in Specification 384,697. Contacts MC, Fig. 1, are closed at each operation of the machine and are connected to a jack J into which is inserted a plug PG. Contacts aa2 connected to the tip of the plug are thus connected to earth and contacts aa3 are connected via the ring of the jack to contacts MC and hence, when MC are closed to earth. When the machine operates, contacts MC close to extend earth potential via contacts aa3 to the lower winding of a relay AA which partly energizes to close contacts aa1 only. The wipers rw1 .. rw4 of a time-controlled switch are advanced every twelve seconds. When contacts MC open, both upper and lower windings of relay AA are energized by the circuit rw3, aa1 and the relay operates completely to open aa2 and aa3. Any relay AA connected to a machine in operation thus becomes locked. When the time switch wiper rw1 makes its third step, a relay SU is energized to close su1. Contacts ba2 are closed periodically and upon their next closure ST is energized and held via st1. At the next step of time switch wiper rw1, the circuit of SU is broken but as this relay is slow to release, a circuit rw1, cw1, su2, relay P, contacts cdm and relay QU is established. QU and P cannot operate in series, but P operates to close p1 to energize a magnet CDM which advances the wipers cw1 ... cw6 of a collecting switch when contacts cdm open to release P. Relay ST is now held via cw5. If, as stated above, contacts aa2 are open because the machine is operating, there is no earth potential on the line 1 and relay P re-operates to cause the collecting switch to move another step. If, however, the machine is not operating, aa2 remain closed and line 1 is at earth potential. P is thus short-circuited and QU operates, contacts qu3 giving an impulse to a counter M. Contacts qu2 close the circuit of magnet CDM while qu1 close a branch path for QU. Contacts qu4, Fig. 2, close the circuit of the magnet UDM of a units registering switch uw1 .. uw8. This switch is thus advanced one step to register one unit of idle time. A unit of idle time is similarly registered on the switch uw1 .. uw4 for each line 1 found by the wipers cw3, cw4 to be at earth potential. Transfer mechanism.-When the wiper uw1 makes its ninth step a relay QT operates to prepare a transfer circuit by closing contacts qt2 in the circuit of a magnet TDM. Relay QT holds via qt1, tw2, hm3 and tdm. When uw1 moves to the tenth position, TDM operates to advance wipers tw1 .. tw4 to register the tens figure, while tdm opens to release QT. When tw1 has made nine steps, a circuit is prepared for the hundreds registering magnet HDM, which at the next step of tw1 is operated to register one hundred. When tw1 has completed nineteen steps, QH operates to prepare the hundreds transfer, but on the twentieth step the transfer is not completed, but instead a self-driving circuit for TDM is made via tdm, tw2, and the last four bank contacts. The tens switch is thus driven to the normal position shown and the hundreds transfer is then completed. The hundreds-thousands transfers are similarly effected. Indicating means. The wipers uw5 .. uw8, tw3, tw4, hw3, hw4 and thw3, thw4 control units, tens, hundreds and thousands indicators IU, IT, IH, ITH in the manner described in Specification 432,447, [Group XVIII]. Recording. Each plug circuit may be connected via aa4 to a printing magnet of the recorder described in Specification 384,697. If a machine is working, an impulse is then sent every minute to the printing magnet from rw3 or rw4 via st3.