|P.O. ENGINEERING DEPT.
Issue 2, 23.4.65
CALL OFFICES AND SUBSCRIBERS' COIN-BOX
1. Scope of Instruction
CALL OFFICE INSTALLATIONS
2. Types of wallboard
3. Wallboard D1/60577
4. Wallboard D2A/60577 and associated items
5. Wallboard D3/60577 and associated items
6. Fitting in Kiosks No. 6 (Mk. 2)
7. Fitting in Kiosks No. 6 (Mk. 1)
8. Fitting in Kiosks Nos. 1, 2, 3 and 4, cabinets and recessed call
9. Box, Coin-collecting, No. 705
Terminate the telephone cable and earth wire on the 'B' terminal block of the coin box (Dgm. N 805). Refit the Mechanism No. 20. Fit a Box, Coin collecting, Parts: Lock No. 39... (recovered from the existing coin-collecting box, or obtained from the Supplies Dept.) to the Cover No. 50A. Box, Coin-collecting, Parts: Lock No. 31 must not be used with the Box, Coin-collecting, No. 705 and requisitions for Locks No. 39 should be endorsed 'Boxes, Coin-collecting, Parts: Locks No. 31 not acceptable'.
To fit and adjust the lock remove the cover locking plate, the lock retaining screws, the label housing
and the adjustable plate from the cover locking plate. Place the lock in the lock mounting and replace the cover locking plate. Each lock retaining screw is provided with two washers of different thickness, one of 10 mil and the other of 28 mil. Thus four positions of the lock can be obtained between the lock and the lock mounting:-
Fit the lock in the position that permits the lock bolt to pass smoothly behind the angled locking plate and permits a maximum of 30 mils estimated forward play when the cover is locked to the cash compartment. Spare washers should be placed under the heads of the lock retaining screws. Replace the label housing and the adjustable plate to the cover locking plate, ensuring that it is in the position which gives the minimum clearance between the edge of the plate and the lock bolt. This plate is reversible and has two sets of fixing holes which enable it to be fitted in four different positions.
If the cover locking mechanism is of an earlier issue with a sliding locking bar the locking lever and label housing must be removed and the lock fastened to its mounting by the four screws supplied with the cover. The lever and label housing should then be refitted. The two projections on the right-hand side of the lever should engage with the upper and lower surfaces of the lock bolt and the left-hand projection should slide in the groove of the locking bar. Care must be taken to ensure that the locking lever spring is positioned over the left-hand edge of the lever. The locking bar is fitted with an adjustable stop. The small projection of the stop should lie between the spring and the locking lever. If necessary, the stop should be adjusted as follows:-
(a) Turn the lock to the unlocked position.
(b) Loosen the locking-bar stop fixing screw and slide the stop until it rests against the locking lever.
(c) Tighten the screw.
(d) Replace the cover and cheek that the key can be turned to the locked position without force and the key removed.
(e) Turn the key to the unlocked position. Raise the cover and turn the key gently towards the locked position until resistance is felt. This occurs when the locking bar engages with the locking stud. Check that the key cannot be withdrawn with the lock in this position.
(f) If difficulty is found in meeting condition (d) a small clearance between the stop and the locking lever is permissible provided condition (e) is satisfied. Difficulty may be due to the top right-hand lug of the locking lever fouling the lock wards. This lug may be adjusted by bending towards the lock backplate to ensure full engagement with the lock bolt.
Fit a Lock No. 6M to the Front No. 10 and slide the front into position on the cash compartment. The lock should be slid approximately into position in the lock housing and then finally adjusted to give smooth operation by pressure on the key inserted in the keyhole. The lock will be held in the chosen position by the strong spring provided in the base of the lock housing. (NOTE:- The Front No. 10 cannot be fully closed and the lock cannot therefore be thrown unless a cash container is in position.) The lock would normally be provided by a collector who
will also fit a Container, Cash, No. 5. If it is not possible for a collector to be present a temporary lock and a Box No. 4 should be fitted. In this case a wad of Paper or similar material should be placed between the Box No. 4 and the Front No. 10, to permit the latter to be fully closed. The Box No. 4 and the Lock 6M will be returned to the T.M. (Eng. Divn.) by the Head Postmaster in due course.
Where a Box No. 4 is to be used permanently in place of a Container, Cash, No. 5, release the front end of the cash container stop spring from its anchorage.
10. Protectors in kiosks
11. Fitting of Boxes, Weatherproof, CD 364
(a) In Kiosks Nos. 2, 4 and 6 the box should be fitted with the entry holes to the left so that the lower left-hand corner of the box is 6 in. from the kiosk floor and 41 in. from the left-hand pillar. The back panel of the kiosk should be drilled (using a 3/16 in. drill) and tapped to take three 1/4 in. B.S.W. x 1/2 in. Rd. Hd. fixing screws (obtained by local purchase).
(b) Before a Box, Weatherproof, CD 364 is fitted in a Kiosk No. 1 or 3, it should be ascertained that the kiosk is not due to be changed because of poor condition. If such a change is proposed it should be made before the box is fitted. The box should be fitted with the entry holes to the right so that the bottom right hand corner of the box is 6 in. from the floor of the kiosk and 7 in. from the right-hand corner. Three holes should be drilled through the back panel of the kiosk using a Bit, Wall, Hard-tipped, in. The box should then be bolted to the back panel by three Bolts, 1/4 in. B.S.W. x 2.5 in. (obtained by local purchase). A washer must be placed under the bolt head which should be on the outside of the kiosk.
12. Protection of leads
On new installations the lead in cables should be run in conduit brought in through the concrete floor to the Box, Weatherproof, CD 364. On existing installations a number of leading-in arrangements may be encountered and any suitable arrangement of conduit from the lead-in point to the box may be used so long as the following principles are observed:-
(a) The cable must be continuously protected.
(b) If an asbestos lead-in duct is in use, the space between the duct side and the conduit must be filled so that the kiosk floor is level and there are no crevices in which coins may be lost.
(c) Any connexions between lengths of conduit must be firm and secure and
should normally be made by means of a Coupling, Conduit, No. 2A or a Bend,
Conduit, No. 2A. If a lead-in conduit protrudes through the floor for a very
short distance and the connexion cannot be made by the normal means the
following method may be adopted:-
13. Termination of cables protectors
14. Protectors in cabinets and recessed call offices
15. Protection of leads where a protector is not fitted
17. Wallboards D1/63747 and D2/63747
(a) Recover the existing coin-collecting box and Containers No. 3 and No. 4.
(b) Recover the upper metal strip at the rear of the wallboards. Cut the strip in half and refit the left-hand half (looking from the rear).
(c) Countersink the four existing in. holes to accommodate the central fixing screws.
(d) Drill five 7/16 in. holes in the wallboard in the following positions (looking from the front):-
(i) 2.25 in. from the left-hand edge and 0.5 in. from the bottom edge
(ii) 2.25 in. from the left-hand edge and 1 ft. 5 7/16 in. from the bottom edge
(iii) 6 9/16, in. from the left-hand edge and 0.5 in. from the bottom edge
(iv) 6 9/16 in. from the left-hand edge and 1 ft. 5 7/16 in. from the bottom edge
(v) 1 in. from the left-hand edge and 1 ft. 1.75 in. from the bottom edge
(c) Cut suitable grooves in the wallboard in preparation for operation (f ).
(f) Fit mild steel strips (made locally to Detail 9 on Drg. 60577) on the rear of the wallboard in the grooves already cut (c) so that their centres are 0.5 in. and 1 ft. 5 7/16 in. from the bottom of the wallboard and their right-hand edges 1.75 in. from the edge of the wallboard looking from the rear.
(g) Fill any unnecessary holes in the wallboard using any suitable material such as plastic wood (purchased locally).
(h) Smooth and repaint the front face of the wall board using a high gloss black enamel.
Fit the bracket to the wallboard using four Screws, 5/16 in. B.S.W. x 3/4 in., Hex. Hd., M.S. (obtained by local purchase) and the metal plates previously fitted in (f ).
(k) Refit the Container No. 4.
When the existing wallboard is not suitable for modification, due to poor condition or otherwise, and a replacement is not available locally a Wallboard D 2/60577 should be modified. The following additional work will be required between operations (c) and (d).
(1) Remove washers from left-hand side fixing holes (looking from front).
(m) Remove a 3 in. strip from the left-hand side Of the wallboard.
(n) Drill two 5/16 in. holes in the wallboard in the following positions (looking from the front):-
(i) 2.75 in. from the left-hand edge and 2.25 in. from the bottom edge
(ii) 2.75 in. from the left-hand edge and 1 ft. 4 in. from the bottom edge
(o) Fit the washers flush by countersinking
(p) Remove the peg from the top edge.
18. Wallboard D 4/60577 and associated items
In standard cabinets and recessed call offices as distinct from kiosks, because of the limited space available, the Wallboard D4/60577 and its associated Wallboard D1/60577 should be fitted as far to the right as possible. In existing installations it may be necessary to move the vertical battens. The extreme right-hand directory carrier must not be used in these situations.
19. Directory holder
20. Fitting of directories
The separate cover is opened out across the carrier and is located by two Pegs No. 15... which are inserted through the former into the carrier. The paper covered directory is opened at the centre of the middle section and the narrow edge of the metal strip is inserted against the directory spine. The directory is closed on the strip which is refitted and locked in the carrier by screwing up the socket-headed set screw. The separate cover is thus held further secured by being compressed against the rubber pad of the carrier by the spine of the directory.
21. Adjustment of brake in directory carriers
22. Labels for directory holders
23. The Box, Coin-collecting, No. 700 is used for subscribers' coin box installations. It includes a Mechanism No. 20 and is used with either a wall- or table-mounted 700-type telephone. A notice is carried on the coin box front and separate notice frames are not used. A Box No. 4 is used to collect the cash.
24. Fitting of coin box
On existing installations the subscriber should be requested to empty the cash compartment before the old apparatus is recovered. Before the coin box is fitted the mechanism compartment and cash compartment fronts (Fronts Nos. 11 and 12) and the Mechanism No. 20 should be removed. The mechanism is connected to the terminal strip by flexible cordage terminated on a plug and jack, and is retained in position by a spring on the bottom of the mechanism compartment.
The coin box should be secured by two Screws for Wood, Steel, Csk. Hd., Size 14 through the adjustable bosses in the mechanism compartment and two Screws for Wood, Steel japanned, Rd. Hd., Size 14 with 1 in. washers through the holes in the cash compartment. The screws should be at least 1 in. long. The bosses are reversible and should be fitted to receive wood screws and adjusted so that the coin box is firmly seated against the wall or wallboard without distortion of the case. The lower two screws should not be fully tightened; this is to facilitate emergency removal of the coin box should the cash compartment lock jam.
Connect the line and telephone (N 2423) using Cable, P.V.C., No. 1 for wall-mounted telephones and Cord, Instrument, No. 9/21AD... for table-mounted telephones. The cord and cable entry hole is in the bottom of the cash compartment. An anchorage for the cord grommet is provided in the lower mounting bracket for the termination strip in the coin box. Refit the Mechanism No. 20. Fit a Box, Coin-collecting, Parts: Lock No. 31 or 39... to the Front No. 11 using the four screws provided with the front. The bolt-retaining bar should be adjusted to obtain a good fit between the front and the case consistent with the lock being operated with only a light pressure on the key.
Fit a Lock No. 14 to the Front No. 12 using the screws provided with the front. The lock will be supplied by the T.M. (Clerical Divn.) for new installations and for existing installations where other types of lock are fitted. To test the lock, the key should be obtained from the subscriber ' who should be requested to lock the cash compartment when the installation is complete. Instruction in the use of the Lock No. 14 and Box No. 4 should be given if required.
25. Wallboard D 91128
To fit the apparatus the notice frames should first be removed from the wallboard using a Key, Frames, .Notice, No. 29 to expose the two upper fixing holes of the wallboard. Fix the wallboard in position using Screws for Wood, Brass, Csk. Hd., 3 in., Size 14. The top edge of the wallboard should normally be 4 ft. 8.5 in. from the floor. Remove the cover and mechanism from the backplate of the coin box. The two bushes near the top of the backplate are reversible and should be fitted to receive countersunk screws. Offer the backplate to the wallboard and adjust the bushes to ensure that the backplate seats evenly on all four supports (if necessary the bushes can be finally adjusted before the securing screws are tightened). Screw the backplate to the wallboard using Screws for Wood, Brass, Csk. Hd., 1.5 in., Size 14 for the top fixings and Screws for Wood, Brass, Rd. Hd., 1.5 in., Size 14 with 1/4 in. washers for the lower fixings. The lower two fixing screws should not be fully tightened; this is to facilitate emergency removal of the coin box should the cash compartment lock jam. Release the front end of the cash compartment locking-bar spring from its anchorage. Fit a Box, Coin-collecting, Parts: Lock No. 39... to the cover and a Lock No. 6M to the Front No. 11. The fitting instructions for the lock in par. 9 should be followed. The Lock No. 6M will be issued with the Advice Note. Connect the instrument in accordance with the appropriate N diagram. Replace the cover, mechanism and notice frames, after inserting the appropriate notices [obtainable from the T.M. (Clerical Divn.)]. Insert a Box No. 4 in the cash compartment. Test the cash compartment lock. The key should be obtained from the subscriber who should be requested to lock the cash compartment when the installation is complete. The subscriber should be shown how to open the cash compartment and how to use the Box No. 4.
On existing installations the subscriber should be requested to empty the cash compartment before the old apparatus is recovered. Should the subscriber not agree to the replacement of an existing wallboard by a Wallboard D 91128, the existing wallboard or, if the demands of good appearance make it necessary, a new wallboard of similar size may be modified to accommodate the Box, Coin-collecting, No. 705 and Frames, Notice, Nos. 30 and 31. The notice frames should be mounted on Brackets, Mounting, DQ and DH, 6.5 in. to ensure that they may only be removed with the aid of a Key, Frames, Notice, No. 29. Drgs. 91128 and 91174 show details of the holes required in the wallboard to accommodate the coin box and notice frames. The holes for the notice frame brackets must be accurately drilled to ensure correct fitting of the glass and frame. Plug any surplus holes in a modified wallboard with a suitable stopping material purchased locally.
TESTS TO BE APPLIED AFTER INSTALLATION
26. The functional tests which should be applied are described in TESTS & INSPECTIONS, Routine, S 5227. No attempt should be made to adjust the mechanism on site; faulty mechanisms must be exchanged with the coin box maintenance centre. If for any reason it is not possible to open a public call office for service immediately after the fitting work has been completed a notice T 431G should be exhibited and should be recovered when the installation is brought into service.
References:- C 3001, D 1001, D 3003
Last revised: July 26, 2020