US1118998A

US1118998A - Recording mechanism.

Info

Publication number: US1118998A
Application number: US75483?13A
Authority: US
Inventors: Joseph Louis Authier
Original assignee: Burroughs Adding Machine Co
Current assignee: Unisys Corp
Publication date: 1914-12-01
Anticipated expiration: 1931-12-01

Description

J. L. AUTHIER.

RECORDING MECHANISM.

APPLICATION FILED MAR.17, 1913.

Patented Dec. 1, 1914.

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misses.

Specification of Letters Patent.

Patented Dec. L 1914.

application aias mmh 17, ms. Serial are. 754,838.

' The present invention relates to recording m mechanism in the type or" machine employing independently movable type in series for denominational orders and adapted to be driven for printing purposes by the action of a hammer. This is common and wellknown in various connections notably in adding and listing machines and it is with the latter class of machines that my 1nvention is particularly concerned.

The object is to provide an improved form of means for yieldingly retracting the type.

It is common to have the type sprin retracted so as to rebound after having Q n struck and driven against the platen by the hammer, the action being a percussive one.

25 My invention relates more especially to.

machines wherein there is the so styled front strike of type against a platen, this being a feature of the so-called visible writing or printing machine. a

By my invention the necessity of extend ing the casing in'which the serles of type is mounted, to accommodate retracting mechanism for the type, is obviated. At the same time provision is made fora practically um form spring retracting action upon. all of the several types.

The drawings which accompany and form part of this specification illustrate a preferred form of embodiment of my invention 40 and l have chosen for-purposes of illustration to use a wellrknown type of adding and listing machine, to Wit, that known as the Pike. Of suchdrawings Figured represehts in right side elevation a suilicient port on of a Pike machine to illustrate the adaptation of my invention thereto; Figs. 2 and 3 are similar vertical sections of a type-carrying lever together with an outline of a roller platen, Fig. 2 showing the parts at normal and Fig. 3 showing atype driven against the platen; and Fig.4- is a cross-section substantially on the line -4-4 of Fig. 2. v

It willbe unnecessary to enter into a detailed description of the machine proper beand State of causedt is so well-known both through disclosures of prior patents and through extensive commercial usage though it should benoted that the relationship of the parts is varied to some extent as compared with the disclosures of Pike Patents Nos. 763,692 issued June 28,1904, 767,956 issued July 16, 1,904,791,941 issued June 16, .1905, and other issued patents on the Pike machine, in that the type carrying levers 403 have a contour and a location relativeto the roller platen 880 which, together with a corresponding variation in the mounting of the printing hamin rs-50l and the conformation of the inclosig casing 500, provides for exposing any imprint to the view of theuser of the machine at the close of the operation that does the printing, it being of course understood that in these machines it is customary to have line-spacing of paper occur in the course of an operation after the printing has been done.

Passing to the matter of my. present invention, each type carrying lever 03 is flanged at the form a housing. Thus there are front and rear flanges 4 and an end fiaugere The front and rear flanges are notched to receive the type 10 of which there are'asusual ten with faces embossed from zero to 9. A cover-plate 5 fits grooves of the flanges to close in the housing. It will be, understood that the less the housing extends beyond the zerotype the better so far as visibility of printing is concerned audit will be noted that in the construction here shownthe housing does not extend farther than'necessary to provide a suitable guide for the zero type. The. character of my type retracting or restoring means is such as to require no'g5 appreciable upward extension of the housing to accommodate it. v

The type are cut out in the side toward the body of the type carrying lever and there is arranged against the latter a shoe 1 11 or plate form curved to conform with the curvature of the front flan e of the housing and normally engaging t e several shoulders 10 of the type, which shoulders mark the rear ends of the cut out portions of such type. At its central portion this "plate or shoe is widened and formed on the -rear side with asocket 11. This socket retype-carrying portion to gg downwardly beyond the series of type. The arm of the lever extending below the pivot is connected by a spring 15 to a stud at a lower point upon-the type carrier and this spring presses the upper longer arm of the lever forward and thus presses the plate or shoe against the shoulders of the type holding all of them forward in position to be struck by the hammer 501. The spring of course yields when the hammer strikes the type. In the case of type engaged with the shoe or plate above its pivotal connection with the lever, the shoe will rock upon a fulcrum afforded by the shoulder 10 of the lowermost or 9 type as illustrated'in Fig. 3,

whereas in the case of type below the pivotal connection of the shoe with the lever, the fulcrum will be afforded by the shoulder of the uppermost or zero-type. of the two middle type, the l and 5 type, they engage the shoe so close to its pivotal connection with the lever that there would.

not be a rocking of thelever on either fulcrum above mentioned, but a bodily displacement.

It will be obvious that the shoe or plate need extend upwardly only far enough to fully engage the shoulder 10 of the zerotype and that no extension of the housing is necessary to accommodate this part of the retracting or restoring mechanism. It will furthermore be noted that the character of the mechanism is such that the spring acts with substantlal unliormity upon each one of these type composing the series.

it is preferable to provide means for definitely limiting the throw of the type and In the case to this end the lever 13 has a projection 13 in rear of its head and designed to strike against the rear flange of the housing.

I claim: i

1. Recording mechanism comprising a housing, a series of type pieces independently mounted to slide therein, a shoe engaging said type pieces to retract them, and a spring-actuated lever engaging theshoe and normally holding it against the several type pieces of the series, the latter when displaced singly for printing purposes displacing the shoe in opposition to the spring of the said lever.

2. Recording mechanism comprising a housing, type mounted to slide therein, a shoe engaging said type to retract them, and a spring-actuated lever pivotally en-v gaged with said shoe at its central portion.

3. Recording mechanism comprising a housing, a series of type independently slidable therein, a shoe engaging all the type, and a spring-actuated lever pivotally engaging the shoe centrally thereof and con trally of the series of type.

The combination of a type carrier having a housing, a series of type sliding through the housing, a hammer to act-severally upon said type, a shoe engaging them to normaly retract them, and a spring-actuated lever applied to said shoe centrally thereof and of the series of type.

Josnrn LOUlS aurnnan.

Witnesses R. W. FAIROHILD, E. R. BARRETT.