Patent GB-190016522-A (GB)
Title: Improvements in or relating to Typewriters and similar Keyboard Apparatus
Inventor: ROSENHAIN WALTER
Filed: 1900-09-17
Granted: 1901-09-14
Abstract: 16,522. Rosenhain, W. Sept. 17. Type-writers ; type, setting and distributing.- Relates to devices for counting the number of words written in a type-writer, or set up in type in a type-setting machine, or telegraphed by a keyboard transmitter, &c. Fig. 3 is a longitudinal section of a type-writer keyboard showing one way of carrying out the invention. A counting- device of any suitable construction is operated by a ratchet-wheel B' and pawl B<2>. The pawl is carried by a lever B', pivoted at B<5>, and normally urged to the left by a spring B<6>. The lower end of the lever B<4> engages a cam-shaped part of a lever C pivoted at C'. The lever C is connected to one end of a universal bar D extending beneath the key levers, and the opposite end of the bar is carried by a spring-pressed pivoted arm which tends to maintain the bar in the raised position. A locking-pawl F<1>, pivoted to the frame of the machine at F, is provided with an extension carrying a stud F<3>, which engages with a slot in the spacing key-lever G. When a character key is depressed the bail D is depressed by it, and the lever C actuates the arm B<4>, so as to draw back the pawl B<2> as shown in dotted lines. At the same time the spring F<2> causes the pawl F<1> to engage with the recess C<2> and lock the bar D in the depressed position. On the completion of the word, the spacing-key is depressed, thus raising the pawl F<1>, releasing the bar D, and allowing the pawl B<2> under the influence of the spring B<6> to turn the ratchet-wheel B<1> through one step. Repeated depression of the spacing-key will not actuate the counting-mechanism until another character key has been depressed, and complete words only will thus be counted. Fig. 7 is a diagrammatic representation of an electrically-operated counting-device, and Fig. 6 shows the ratchetwheel B<1> and the magnet L<1> which actuates it. The ratchet-wheel B' is actuated by a pawl K<2> carried by a lever K<1>, the opposite end of which bears a polarized armature L, adapted to be attracted to or repelled from the doubly-wound magnet L<2>, L<3>. The contacts and circuits are so arranged that the depression of a character key causes the repulsion of the armature, and the depression of the spacing-bar its attraction, the latter movement effecting a partial rotation of the ratchet-wheel B<1>. The armature remains in the repelled or attracted position until the opposite impulse is given to it. The closing of the circuit through the repelling-coils L<2> is effected by the contact of a key lever with two spring- cushioned universal bars M, and the attracting- circuit is closed by the depression of two pairs of bell-push studs N<2> by means of the spacing-frame. The two pairs of studs N<2> are employed for the sake of symmetry, one contact only being really required. Platinum contacts may be provided on the bars M and on the key levers. Two electromagnets acting oppositely on a soft iron or polarized armature may be employed. The Provisional Specification states that in order to avoid the necessity for depressing the spacing-key after the last word in the line, mechanical trip devices or electrical contacts may be provided on the carriage so as to operate the counting-train when it is pushed to the right. This mechanism is thrown out of action if the hyphen key is depressed at the end of a line.