Patent GB-191030292-A (GB)
Title: Improvements in the Setting of any Apparatus from a Distance.
IPC: G05D3/14
Filed: 1910-12-30
Granted: 1911-12-30
Abstract: 30,292. Siemens Bros. & Co., [Siemens & Halske Akt.-Ges.]. Dec 30. Telescopes.-A system for setting any apparatus electrically from a distance or in accordance with indications received from a distance comprises two or more receivers controlled by independent transmitters for coarse and fine adjustments respectively. The arrangement shown in Fig. 1 as applied to a telescope comprises a coarse adjustment I4, K4 for setting a rack B4, and a fine adjustment I<1>4, K<1>4 for setting a more delicate rack B<1>4 carried by the rack B4. The receiver K4, controlled by the transmitter I4, moves a roller R4 out of a recess in a wheel S4 so as to close the contact f4 of a motor M4 which raises the rack B4 until the recess of the wheel S4 is again opposite the roller R,. A spring tooth c4 engages one of the notches d4 to give the rack a definite position. The fine-adjustment receiver K<1>4 may actuate the rack B<1>4 directly, or in the manner described for the coarse adjustment. In the arrangement shown in Fig. 4, hundreds, tens, and units transmitters I6, I<1>6 I<11>6 control, by separate sets of leads l6, l<1>6, l<11>6, receivers K6, K<1>6, K<11>6, having pointers z6, z<1>6, z<11>6, which tend to set themselves in positions corresponding to those of the transmitters. Each transmitter axle has a setting-handle, and the axles are geared through wheels 51 ... 54. The wheels 53, 54 are loose on their axles, but carry spring-pressed rollers bearing on scalloped disks 56, 58 fast on the axles. By means of this device the handle of the hundreds transmitter can be operated without turning the axles of the other transmitters, the handle of the tens transmitter being then set, which gives a correcting motion to the hundreds axle but does not turn the units axle, and lastly the units handle is set to make the final adjustment. The pointers z6, z<1>6, z<11>6 lie normally between forks consisting of pairs of contacts on arms 25, 27, 29, these arms being on sleeves connected through gear wheels 18, 21, 16, 20, 14, 13 to each other and to a motor M6. The gearing is such that the arm 25 turns ten times as fast as the arm 27, which turns ten times as fast as the arm 29. When the transmitters have been set, the pointers z6 &c. endeavour to turn to corresponding positions, and, in turning against the forks which embrace them, they short-circuit one winding of a relay R, which connects the mains L2 in one or other sense to the motor M6. Resistances 30, 31 ensure that the receiver K, has at first the predominant effect on the relay R, but, when the turning of the arm 29 has again brought its contact fork out of engagement with the pointer z6, the effect of the receiver K<1>6 predominates, and the relay R, if necessary, reverses the motor M6. Finally all three pointers z6, z<1>6, z<11>6 lie again between their contact-pairs, and the motor M6 is cut out. The total rotation of the motor shaft corresponds to the setting of the transmitters I6, I<1>6, I<11>6, and a worm e6 communicates a corresponding degree of motion to the apparatus which is to be set. In a third arrangement, shown in Fig. 6, tens and units transmitters I9, I<1>9, geared together and operated by a single handle 75 and moving a single pointer over a dial 76, control independently receivers K9, K<1>9 with pointers z9, z<1>9. An operator at the receiving station adjusts the apparatus which is to be set, by turning a handle k until a pair of checkpointers g9, g<1>9 are opposite the pointers z9, z<1>9. A bell circuit may be controlled by contacts on the check pointer g<1>9 and on a disk 84 to signal the agreement or disagreement of the indicating and adjustment pointers.