Patent GB-759388-A (GB)
Title: Improved thread arrangement for the knotting of ligatures
IPC: A61B17/12
Filed: 1953-12-07
Abstract: 759,388. Ligaturing devices. KAMMER, K. Dec. 7,1953 [July 3, 1953], No. 33906/53. Class 81(2). In a thread arrangement for the knotting of ligature threads the thread is temporarily located on a carrier and arranged in loops having the same disposition as they are required to have in a ligaturing device, said carrier being adapted to be fitted over or brought into engagement with the thread-holding members of the ligaturing device and the thread transferred to said members whilst maintaining the looped disposition. Figs. 1-3 show the manner in which a thread 1 is kept prepared on a two-part carrier comprising a cover plate 4 and a base plate 10 the thread being so wound in two loops 2, 3, that a double knot is produced when the loops are tightened. The plate 4 has a size corresponding to the form of the top of a ligaturing device such as is described in Specifications 747,617 and 750,525. The thread loops are determined in size and shape by raised portions, 7, 8, 9, integral with the plate 10 projecting above the surface of the plate 4. A plurality of threads 1, each in looped arrangement on its carrier, are shown in Fig. 7 stacked in a container 17 closed at its foot by a closure plate member 15, 16, the container and member being so slotted at 18, 19, that threads with carriers are extracted therethrough as required. The container 17 shown in Fig. 9 is provided with a suspended mandrel 21 on which the carriers are threaded and the container and member 15, 16, are so constructed that they may be assembled such that the extraction slots 18, 19 do not coincide and the container is closed when not in use. In the embodiment shown in Fig. 11 a manually operated spring-loaded push member 22 is provided to deliver a thread on its carrier from the container 17 when required. In a further form of container the extraction slot is at the top of the carriers and threads being raised one after the other to the level of the slot by means of a spring. In a modified form of thread carrier, Fig. 13, intended for use with a ligaturing device 27, Fig. 15, similar to one disclosed in Specification 747,617 the thread 1 is secured in its form and position on a base plate 24 by means of a pressed-on celluloid cover plate 25. The hole 26 in both plates is used for the reception of a clip 28 whilst the holes 29 are adapted to receive pins 30 which project from the head of the device and support the second knotted loop prepared for tightening. In use the thread 1 disposed between the plates 24, 25, is placed on the device 27 such that the plate 25 is at the bottom whilst the clip 28 and pins 30 engage the holes 26, 29 respectively. The free ends of the thread are connected to spring- loaded buttons 37. The prepared thread loops are detached from their bed between plates 24, 25, and become disposed round the clip and pins 28, 30. The base plate may now be removed as may also the plate 25 still under the thread 1. This latter is effected by tugging flaps 34, 35 to divide the plate into two parts along a perforated line 33. The thread carriers may be of metal, plastic material, rubber or glass whilst the threads may be of silk, twine, catgut or a polyamide fibre.