US409289A - Printing mechanism for type-writing machines - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

A. I. J AOOBS. PRINTING MECHANISM FOR TYPE WRITING MAGHINBS.

No. 409,289 Patented Aug. 20, 1889.

(.No Model.) 2 Sheets-Sheet 2.

A. I. JACOBS. PRINTING MECHANISM FOR TYPE WRITING MACHINES.

No. 409,289. Patented Aug. 20, 1889.

ATENT ()FFICE.

ARTIIUR I. JACOBS, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE TIL- TON MANUFACTURING COMPANY, OF PORTLAND, MAINE.

PRINTING MECHANISM FOR TYPE-WRITING MACHINES.

SPECIFICATION forming part of Letters Patent No. 409,289, dated August 20, 1889.

Application filed October 6, 1888.

To all whom it may concern:

Be it known that I, ARTHUR I. JAooBs, of Hartford, Connecticut, have invented certain new and useful Improvements in Printing Mechanism for Type-Vriting Machines, of

which the following is a specification.

M yinvention relates to the mechanism used to strike the types of the class of type-writers wherein the types are carried on a plate ID or a type-wheel, which is moved in various directions to bring the proper type into position to be struck by a hammer or plunger to print the desired character; and the object of the invention is to construct the mechan- I 5 ism so that the plunger or hammer will. im-

part a blow to the type by the depression of a lever and be allowed to return to its normal position as soon as the character is printed, without regard to the position of the printing 2o lever, in order to secure speed in writing with a machine of the above-mentioned class.

Referring to the accompanying drawings, Figure 1 is a plan view of one form of machine of this class with my improvement attached. Fig. 2 is a front elevation of a part of the same. Fig. 3 is a side elevation of a part of the machine. Fig. 4.- is a detail side view of the lever for imparting motion to the printing-hammer, showing the jointed arm that is attached to the hammer-frame in edge view. Fig. 5 is a view of the same, showing the position of the lever when depressed. Fig. 6 are side views of the jointed arm, showing its various positions during the motion of the lever.

In the drawings my improvement is illustrated as applied to a machine the bed of which has an upright frame a, to which is pivoted a segmental gear 1), that is oscillated o horizontally by means of a lever c, which travels over a character-index d. This segmental gear meshes with a gear 6, that is pivoted to the back of the frame a so as to oscillate vertically, and secured to the back of this so as to oscillate with it are the disks g g, the disk g being slotted to properly guide and diroot the movement of the hammer against the back of a type, which type are flexibly secured to the disk g, so that under the impact of a blow from the hammer or plunger h a char- Serial No. 287,390. (No model.)

actor will be printed upon paper carried across the machine in the paper-carriage t', which is moved by any common ratchet-and-pawl mechanism. The desired character to be printed is of course brought into position by the movement of the lever 0 across the index, the gears transmitting the motion to the type wheel.

The lower end of thelever bearing thehammer or plunger h is forked, as at h, and this fork is pivoted to a part of the upright frame a, so as to oscillate back and forth when it is desired to print a character. Projecting down from one arm of the fork is the arm Z, to which the plate m is so connected as to be capable of independent movement backward, swinging on the pivot 0, but that it is held as one piece to the arm Zwhen the plate at is pulled forward, the pin m, fast to the plate on, striking the bottom of the slot Z in the end of the arm Z, in which position it is normally held by the spring 977. holding the parts Z and m together. The lower edge of the plate m has an inclined surface or rib a for a part of its length, and between the upper end of the rib and the bottom of the arm l is a channel or.

The lever p is so pivoted to a post that rises from the bed of the machine as to have avertical oscillation, one end of the lever being so bent as to lie in the path of movement of the printing key-lever q, while the other end, under the influence of the spring p, lies under the inclined rib 011 the plate m.

In writing with the machine, when the printing-lever q is depressed, the outer end of the lever 19 is also depressed, with a consequent rising of the inner end, which, coming in contact with the incline on the' plate m, forces the plate forward out of its way. This causes the arm to be thrown forward and the hammer backward, so that the hammer strikes the back of a type and produces an imprint on the paper. When the end of the lever reaches the cut-away portion or channel n at the end of the incline, the arm is allowed to return to its normal position, as shown at r in Fig. 6, which of course pulls the hammer back from the type and out of the slots in the disk g, so that the index-lever can be turned to the next character to be printed. When the lever qis allowed to rise, the spring p forces the end of the lever 13 down, the top face of the inclined rib pushing it out of the way, as shown at S in Fig. 6, as before stated, the plate m having an independent motion back ard. As soon as the end of the lever is clear from the incline, the spring m returns the plate to position for another action, as shown at t in Fig. 6.

This construction allows a blow to be imparted to a type and the hammer to return to position for another blow without waiting for the key-lever to rise to its normal position, which is essential to speed in thisclass of machines where thehammeris usually guided into a slot in the type wheel or plate, from which slot the hammer has to be withdrawn before another type can be brought up to be forced against the paper.

I do not limit myself to this exact form of type-Writer to which to apply my printing mechanism, as it can be adapted without the exercise of invention to several type-writers of this class; nor do I limit myself to a pin and slot to prevent independent movement in one direction of the plate bearing the inclined rib, asother forms of stops can be used for this purpose.

I claim as my invention- 1. In combination, in a typewriter, a hammer with a projecting arm, pivoted to which is a plate having an inclined rib, which when forced in one direction moves the arm and hammer, but when forced in the opposite direction moves independently, and a printinglever adapted to move the plate by contact with the inclined rib, substantially as described, and for the purpose specified.

2. In combination, in a type-writer, atypewheel, a hammer with a projecting arm, to which is pivoted a plate bearing an inclined rib, with a channel above the end of the rib, which when forced in one direction moves the arm and hammer, but when forced in the opposite direct-ion moves independently, and a lever with one end adapted to move the plate by contact with the incline, substantially as described, and for the purpose specified.

3. I11 combination with a type-writer, a type-Wheel, a hammer with a projecting arm, to which is pivoted a plate bearing an inclined rib for a part of its length,which plate when forced in one direction moves the arm and hammer, but when forced in the opposite direction moves independently, and a lever with one end adapted to move the plate by contact with the incline and the other end bent into the path of a key-lever, substantially as described, and for the purpose set forth. V

4. I11 combination with a type-writer, a type-wheel, a hammer with a projecting arm, to which is pivoted a plate bearing an inclined rib, said plate bearing also a pin that projects into a slot in the arm, so that when the plate is forced in one direction it moves the arm and hammer, but when forced in the opposite direction moves independently, and a lever with one end adapted to move the plate, substantially as described, and for the purpose set forth.

ARTHUR l. JACOBS.

\Vitnesses:

F. D. TAYLOR, J os. A. WHITE.

Images