Patent GB-190227035-A (GB)
Title: Improvements in and connected with Chronometric Stamps and the like.
Inventor: BURDA FRANZ ADOLF EGON
Filed: 1902-12-08
Granted: 1903-03-12
Abstract: 27,035. Burda, F. A. E. Dec. 8. Tell-tales for checking watchmen &c. Relates to apparatus for printing the date and time, and is shown arranged as a stamp. The printing-wheels and their operating-mechanism are mounted in a frame or casing d fixed to a tubular stem c arranged to slide in the bush b of an outer frame a, a spring g serving to hold the inner frame &c. in raised position. The parts are operated by an electromagnet y, the circuit of which is closed once every minute by the operation of a controlling watch or clock, which may be placed in the casing k or at a distance. The clock is automatically wound by means of a shaft m engaging by a tooth clutch q, q<1> a ratchet-wheel t, operated by a pawl pivoted on the upper end of a lever frame z, pivoted at 1 and having an armature x cooperating with the magnet y. A spring 1<a> returns the frame z. The printing-wheels are on a shaft 14<a>, and above this is a shaft 14 on which some of the operating-wheels are mounted. These shafts are in sleeves 15, 15<a>, 15<b>, 15<c>, extending out through slots e in the frame a. The units minuteprinting wheel 23 is fixed on the sleeve 15, and on this are also a ratchet-wheel 7 and a toothed wheel 18 engaging a wheel 19 loose on the sleeve 15. The ratchet-wheel 7 is operated by a pawl 6 on the lower part of the lever frame z. A singletoothed wheel 20 fast on the sleeve 15<a> operates a toothed wheel 21, loose on the sleeve 15, and this through an attached wheel 22 drives a wheel 24 fixed to the tens minute-wheel 25. A two toothed wheel 26 on the wheel 24 operates the hour driving- wheels 27, 28 fast on the sleeve 15. The wheel 28 gears with a wheel 29 fixed on the hour-printing wheel 29<a>. A single-toothed wheel 30, attached to the wheel 29, operates wheels 31, 32, the latter gearing with a wheel 33 on the meridian-printing wheel 34. Attached to the wheel 33 is a sixtoothed wheel 35 which drives wheels 36, 37, the latter gearing with a wheel 38 attached to the units day printing wheel 39. The tens day printing wheel 45 is driven by the single-toothed wheel 40 and transmission wheel 44 &c. The units wheel 39 is fixed on the sleeve 15<c>, and the transmission wheels for the tens wheel 45 are fixed on the sleeve 15<b>, so that either of these may be adjusted by turning the milled heads of these sleeves. The minute wheel 23 and hour wheel 29<a> may be similarly adjusted by turning the sleeves 15<a>, and 15 respectively. The wheels 21, 27, 31, 41 are normally locked by four pawls 9 on the lever z, and the wheel 18 is locked by a forked extension of the lever. The lever z may be rocked to free these pawls, for hand adjustments by the sleeves 15 &c., by means of a cam 75 on a shaft 74. The month printing wheel 79 and year printing wheels 82, 83 are to be adjusted by hand, and are held in adjusted position by set-screws 81, 81<a>. The one, two, and six toothed wheels 20, 26, 30, 35 are constructed as shown in Fig. 6, their teeth being mounted on springs 30'. A bolt 70 on the lever z prevents the depression of the stamp frame d when the lever is attracted by the magnet y. A visible indicator is provided for showing the positions of the printing-wheels, and consists of a dial over which move a minute hand 55, an hour hand 62, and a day hand 68<a>, each on a separate sleeve, geared by bevel gearing to sleeves on a shaft 46. These sleeves are separately geared to the wheels 19, 57, 63. The wheel 57 is fast on the hour sleeve 15, and the wheel 63 is fast on the sleeve of the unit day transmission wheels. The types are inked by a roller 88 carried by levers pivoted on the casing d, operated by a stud on the outer casing, and returned by a spring. The roller is supplied by a pad 94 attached to a perforated ink reservoir 94'. In a modification suitable for actuation at a distance by a watchman &c., the casing containing the printing-wheels &c. is hinged to a support and is moved down, to make the impression, by an electromagnet. It prints on an endless strip moved forwards a step at each impression by ratchet mechanism.