Patent GB-190314568-A (GB)
Title: An Improved Lock or Latch for the Doors of Railway or other Vehicles.
Inventor: LAWRY HENRY
Filed: 1903-06-30
Granted: 1904-05-05
Abstract: 14,568. Lawry, H., and Stenlake, G. June 30. Locks, railway and other carriage door; handles, attaching.-The lock is enclosed in a case, having an outer cover 1, Fig. 1, and a back-plate extended at 4 to receive the securing-screws. An inclined plate 6, which may be part of the plate 1, fits into a recess in the door, and is perforated for the passage of the bolt 7. The bolt is recessed at 8 and has a slot 9, with which engages a roller upon a pin 10, which projects from the under face of the cranked lever 11. A pin 12, with a collar 13 and reduced ends supported by holes in the back and front plates of the case, carries the lever 11. The opposite end of the lever 11 has a pin 14 upon its underside engaging a hole in the connecting-bar 15. This is under the action of a spring 16, connected at one end to the projection 17 of the bar 15 and at the other to a pin 18 upon the under plate. Short arms 19, 20, connecting the upper and lower ends of the bar, are secured to the inside and outside handles of the door. The outside handle is secured to a plate on the outside of the door by a collar forming part of a square spindle which projects into the door. A sleeve connects it with the squared end of the spindle 26, to which is secured the arm 20. By turning either of the arms 19 or 20, the bar 15 is moved against the action of the spring 16 and rotates the cranked lever 11 upon its pivot, drawing back the bolt 7. A pin 27, engaging a slot 28 in the back-plate, keeps the bolt horizontal. The arm 19 is supported by means of the projection 29, Figs. 1 and 3, which enters the hole 30 in the block 31 forming part of the bearing for the handle. The bearing is completed by the block 33, and is secured to the plate 1, Fig. 1, by screws 34 passing through the plate 1 and clearing-holes in the block 31 into the outer portion 33. The handle comprises a cross-piece secured to the shank 34<a>, Fig. 3, which is hollowed to receive the spindle 35 secured therein by a pin 36. The spindle 35 has a collar 38 and a short tongue 39, which enters the slot 40 within the end of the projection 29 when the handle-piece is horizontal. The spindle passes through a circular piece of metal 41 recessed in the blocks 31, 33 and also through a sleeve 42, part of the circular piece of metal 41 forming a pivot, upon which the handle rotates into a vertical position by its own weight when released. To permit this, a slot 43 is formed in the underside of the blocks 31, 33, Fig. 4, so that the sleeve lies between the walls of the slot when the handle falls. A passage 44 in the blocks receives the tongue 39, and a collar 37 formed on the handle is hollowed on the underside to agree with the supporting-block. The bolt 7 has a bevelled edge to permit its withdrawal when the door is slammed. The inner handle may also be connected with the lock as shown in Figs. 5 and 6, in which case the depression of the handle into a vertical position frees it from the lock. Within the circular recess of the hollow block 47 is a short spindle 48, surrounded by a spring 49, one end of which abuts against the collar 50. The outer end of the spindle 48 is pivotally attached to a handle 52 provided with lugs 53. These lugs are sufficiently wide to engage with the block 47 when the handle is in a vertical position, and, by compressing the spring 49, disengage the bar 51 and the projection 29. Figs. 7 and 8 show another arrangement of the inner handle. A block of metal formed in two parts 54, 55 is recessed to form a bearing for the circular piece 56, perforated at 57 for the passage of the spindle 58. This spindle has a collar 59, and a tongue 60, which enters the slotted projection 29. A spring 61 fits in the recess 62 and surrounds the spindle 58. A circular piece 56 has a projection 63 to limit its movement in the slot 57<a>. By pulling the handle against the spring, the tongue 60 is freed from its slot in the part 29 and when the tongue is in a position to engage a slot, the handle may be turned into a vertical position.