US323495A - Type-writing machine - Google Patents

Type-writing machine Download PDF

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US323495A
US323495A US323495DA US323495A US 323495 A US323495 A US 323495A US 323495D A US323495D A US 323495DA US 323495 A US323495 A US 323495A
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type
key
levers
writing machine
platen
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material

Description

5 Sheets-Sheet 1.
(No Model.)
B. A. BROOKS.
TYPE WRITING MAGHINE.
Patented Aug. 4, 1885.
lllllll/I/ (No Model.) 5 Sheets8heet 2.
B. A. BROOKS.
* TYPE WRITING MACHINE.
No. 323,495. Patented Aug. 4, 1885.
N. irms. PlxotuLilho npher, Wnhmgi m. DJ:v
5 Sheets-Sheet 3.
(No Model.)
. B. A. BROOKS.
TYPE WRITING MACHINE. No. 323,495. Patented Aug. 4,, 1885.
Wizessea .5108? I r.
g i W W N. PETERS. Fhclwuimgrsyhva washin mfl. D. c.
(No Model.)
5 Sheet-Sheet 4. B. A. BROOKS.
TYPE WRITING MACHINE- Patented Aug. 4, 1885 in Al E *Q L Vwwsyses- Divan/ZOE N. PEYERS, Pimwumn u hm Washinglan. n. c.
(No Model.) 7 I 5 Sheets-Sheet 5.
B. A. BROOKS.
TYPE WRITING MACHINE. No. 323,495. PatentedAug. 4, 1885.
- the parts of the machine.
' hence the leverage of said key-levers may be UNITED STATES PATENT QFFECEO BYRON A. BROOKS, OF BROOKLYN, NEW YORK.
TYPE-*WRITING MACHINE.
SPECIFICATION forming part of Letters Patent No. 323,495, dated August 4, 1885.
Application filed June 13, 188-1. (No model.)
To all whom, it 12mg concern:
Be it known that I, BYRON A. BROOKS, residing in Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvementsin Type-Vriters, of which the following is a description in such full, clear, concise,and exact terms as will enable any one skilled in the art to which my invention belongs to make and use the same, reference being had to the accompanying d rawings,1naking part of this specificatiomand to the letters and figures of reference marked thereon.
In the drawings, Figure 1 is a side elevation of my machine, partly in section. Fig. 2 is a top view. Figs. 3, 4, 1 2 and 3*, detail parts of the same, and Fig. 5 a vertical crosssection through Fig. 1.
My invention consists in certain novel parts and combinations of parts constituting an improved type-writing machine.
Iertain features of novelty described and illustrated in this specification, but not claimed herein, are included in an application now pending before the Patent Office, while others are reserved for applications which will be hereafter filed.
Referring to Fig. 1, q is a slab of metal extending the entire width of the machine, the face of which is out with a series of parallel longitudinal grooves to receive the projections a on the under side of the key-levers A, &c. The projections a may be set in either of said grooves on this fulcrum-piece q in assembling The projections a may be set in either one or the other of the grooves of the fulcrum-piece q, to alter and adj ust the leverage of each k ey-lever independently. By moving such levers forward the distance between the fulcrum-point a to the point where the force is applied by its correspondin g key is diminished, while the distance between said fulcrum-point and the spring 6 at its rear end always remains the same;
adjusted by altering the points at which they severally bear on the fulcrum-piece q.
As clearly seen on reference to the drawings, the levers A A are of different lengths, and for the purpose of having them all evenly balanced it is necessary that the fulcrum-points of the several levers should be at different distances from the front and rear of the box of the machine. The fulcrum-piece described is for the purpose of furnishing a convenient means of such adjustment. By evenly balancing all the type-levers the type-keys are'made to operate with equal resistance.
Connected to the ends of the key-levers are shown spring-bars 6, but rigid bars will answer every purpose. The opposite ends of these bars 6 are suitably connected to the shorter ends of the bell-crank levers D GQcarrying the types of the machine. These bellcrank levers are all pivoted to a stationary frame, I), and each carries one, and only one, type. For the purpose of economizing space the levers D O are made of thin strips of metal and of different lengths, being correspondingly pivoted on the stationary support, so that when actuated, the types which they severally bear will strike upon the platen at a common printing-point. Figs. 1 and 2 illustrate in detail the construction of said bell-crank type-bars and their supports, Fig. l being a side elevation, and Fig. 2 a vertical crosssection through the same, parts being broken off. To prevent lateral vibration of the thin type-bars, I provide them at their pivot-points with bearing surfaces,as is clearly shown in Fig. 2*. These bearing surfaces are formed by the support I) and the enlarged button-head on the pivot f. The pivot f is riveted to and is stationary in relation to the the supportb. Between these two surfaces the typebars vibrate to print their respective characters. The width of these levers D 0' should be less than the width of the types which they respectively bear, and they are so placed with relation to each other that the lovers bearing the type in the upper segment will, in moving down to the printingpoint, freely pass between the adjacent types on the lower segment.
Supported above the front ends of the levers A A is a shifting key-board, d d, carrying the keys A A arranged to move vertically in said frame and normally held in their po sition of greatest elevation by the coiled springs 8. Referring to Figs. and 3, this sliding key-frame is susceptible of a lateral movement, which is controlled by the key 13' and the springs 71 71, the said key operating any suitable device, such as a cam or a lever, h,
.faces of all the types at the same time.
to move the frame laterally against the springs One form of device for shifting the key-board is shown in Fig. 3*. x is a wedge depressed by the key 13' and returned to its first position by a spring, This wedge acts against the inclined projection, :0 on the key-board to shift the same. WVhen the key 13 is released,the key-board returns to its normal position by the agency of the spring 00.
It will be observed that the forward ends of the levers AAare not fastened or in anyway connected to the keys A A. It will also be observed in Fig. 2 that for each type-key there are two levers, A A, provided, which levers may be alternately operated by their corre sponding key, as the frame cl bearing the same is moved laterally to bring the key over one or the other lever in turn. By the arrangement of the devices hereinbefore described I am able by the operation of a single key to print two or more characters, carried by separate type-levers vibrating on fixed pivots, substantially as described.
O is an inking-pad made in the form of a segment of a circle to correspond with the position of the types, and bearing evenly on the It is swung upon the rod 1), supported above the type, and operated by the bent lever 19, one end of which is connected by the rod 0 and lever O to the spacing-key B. WVhen the spacing-key is in its normal position,the pad is swung up and out of the path of the type in traveling to the printing-point, and when it is actuated the pad is swung down and pressed evenly againstthe faces of all the types. A separate key, marked inker, Fig. 2, is also connected to the lever which operates the inking-pad, so that, if desired, inking the type may be accomplished independently and with out making a word-space. Each time, therefore, the key B is depressed to space between words the inking-pad presses against thefaces of all the types and supplies them with ink.
In Fig. l of the drawings the lever O, operatingtheinking-pad,isshown,Fig.1,direc y beneath the spacing-key. In Fig. 2 the inking-pad lever does not extend all the way back to the spacing-key, but terminates at the but ton marked inker, where it may be connected by a lug or projection, 2, to the arm which supports the spacing-key, which arm is pivoted to the frame at or near its center. The inking-pad may he, therefore, operated either by the key marked inker, which is connected directly therewith, or by operating the spacing-key, which is connected to said inking-pad lever 0' through the arm which sustains the spacing-key. The spacing-lever is connected in a similar manner to the extreme right of the spaciligkey.
Referring to Fig. 4., instead of a pad or similar device, I may use an inking-ribbon, z, wound around areel, j, and unwound against the force of a spiral spring connected to 1 said reel and its shaft by the revolution of the wheel 3'', provided with teeth on its raised periphery, combined with the stationary pawl Z and the pawl m, carried by the pivoted arm it, operated by the variable spacing-rod t. The reels j" and j are supported on the frame a in sucha position that the ribbon traveling between them is held a small distance above the paper on the platen E, and preferably at right angles to the said platen, the said reels coacting to hold the ribbon taut, prevent smirching and blurring, and to leave the matter as it is being printed always in sight of the operator. By the means described it will be seen that the ribbon moves forward with every printing-impulse to present a fresl surface to each successive type. XVhen the whole length of ribbon has been wound off the reel 9' on the reel 9'', by drawing the pawls 8 1 m and Z out of engagement with their eorres donding ratchet-teeth, the coil spring on the reel j will again wind the ribbon back on the reel j.
The bars 2'' i, Fig. l, are tracks upon which the platen-carriage slides. This carriage holds the pivoted cylindrical platen E and the device for revolving the same upon its axis. The platen-carriage is free to move longitudinally upon the bars t '6', said longitudinal movement being imparted by the rack is, connected thereto, in combination with the revolving screw j, which is in turn actuated (see Fig. 3) by the pawl q meshing in the ratchet-teeth h", and its attendant parts, combined with the spacing-bar t, having a variable vertical movement. These devices,whichact as an escapement, operate as follows: Connected to the spacing-bar t is the broken levert it, which, when raised by means of the pivoted arm S, presses the pawl q out of connection with the ratchet-teeth on the circumference of wheel 7/. The arm S being raised still farther throws the arm bearing the pawl q downward. As the arm a is lowered, the pawl,being released, falls into the ratchet-teeth opposite. During this operation the prong g on the arm pivoted to the stationary support 1; and the arm u, projects between the pins 12 on the side of the wheel h and prevents the said wheel from revolving under the influence of a spiral spring, i, connected thereto. (See Fig. 4.) As the arm it continues to descend after the pawl q has fallen into connection with the ratchet, as before described, the prong g is withdrawn from between the pins 12, and the wheel h revolves under the influence of said spiral spring connected thereto until it is stopped by the arm S coming in contact with the stop-pin w, which projects from the frame of the machine.
The attachment of the pin to theframe of the machine is not shown, but said pin may be supported by a rod projecting from any of the stationary parts of the machine or framesuch, for instance, as the standard 2;.
The bar t is provided with a series of set- IOG IIO
screws, 1* 1', one for each key-lever A. These key-bars A each have a given vertical move ment, and it will be readily seen that the distance the bar I? rises when a given lever A is actuated, and therefore the lateral movement imparted to the platen E, may be governed by the adjustment of these set'screws. This device is for the purpose of regulating the spaces between the impressions of the type and to impart the amount of lateral motion to the platen necessary to insure an equal space between theletters, whether theletter be broad or narrow.
The revolution of the screw j may be reversed to draw the platencarriage toward the right hand by means of a horizontal rack, n, and the intermediate cog-wheels and pinions, a, a, and b.
In this specification I have confined myself to the description and illustration of a machine in which each type-key is capable of operating two different type-levers, but by providing the movable keyframe with means whereby there may be imparted to it various degrees of lateral movement, each key may be made to operate three or more type-levers.
Certain features shown herein are shown and claimed in my application No. 131,967.
Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-
1. In a type-writing machine, the combination of a vibrating frame bearing a series of type-keys with a series of key-levers controlling the movement of the printing-type, the type-keys operating above but not connected to the corresponding levers, each key being combined with a plurality of key-levers and brought in position to operate the same by the vibrations of the l ey-frame, substantially as described, for the purpose specified.
2. In a type-writing machine, the combination of a vibrating liey frame, (1, suitable mechanism, It, for imparting to said frame its vibrating movement, typekeys A, springs s, and corresponding key-levers, A A, control ling the operation of the printing-type, substantially as described.
3. In a type-writing machine, a series of key-levers of different lengths capable of being adjusted to various fulcrum-points to give equal leverage, combined with a series of keys operating above but not connected with said levers, and with suitable fulcra, substantially as described.
4. In a type-writing machine, a fulcrumpiece, q, provided with a series of grooves cut in its face and combined with the key-levers A A, pivoted therein, substantially as described.
5. In a type-writing machine, in combination with the inking-ribbon, two reels to which said ribbon is attached, one of said reels being operated and controlled byaratchet-wheel and paw], and the other being controlled by the action of a coiled spring operating against the throw of said pawl to draw the ribbon back when said pawl is released, substantially as described.
6. In a type-writing machine, aplaten, rack, and worm-wheel operating the same, a ratchetwheel and pawl to control the revolutions of said worm-wheel, combined with a rack-bar and connecting pinion-wheels, operated and combined, substantially as described, for the purpose of drawing the platen-carriage back.
7. In a typewriting machine,a platen, rack, and worm-wheel operating the same, a variable escapeinent to control the revolutions of said worm-wheel, combined with a rack-bar and connecting pinionwheels, operated and combined, substantially as described, for the purpose of drawing the platen-carriage back.
8. In a type-writing machine, the combination of an inking-ribbon, 2, spring-reel j, reel 3'', ratchet operating the same, connecting-bar, and spacing mechanism, substantially as described.
9. In a type-writing machine, and in combination with the platen thereof, an escapement-wheel and pawl having a positive variable throw, key-levers, spacingbar, and connecting-rods, substantially as described.
10. In a type-writing machine, a platen-can riage and a rack and worm-wheel combined with a variable escapement controlling the movement thereof, substantially as described.
11. In a type-writing machine, the eombination of key-levers, a bar having avariable reciprocating motion, an escapement-wheel and pawl having a positive variable throw controlling the forward movement of the platen, substantially as described.
12. In a type-writing machine, and combined with the platen-carriage, a rack and worm-wheel, and an escapement-wheel, and a pawl having a positive variable throw, substantially as described.
13. The combination of a spring, i, ratchetwheel in", pawl q, pivoted bars S and S, pins 1), prong g, and aetuatingdevcrs, substantially as described, to produce a variable escape ment.
BYROX A. BROOKS.
Vitnesses:
WM. H. Bnoannllx, J. EDGAR BULL.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2652917A (en) * 1949-07-16 1953-09-22 Khalil Seyed Escapement mechanism for typewriters and the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2652917A (en) * 1949-07-16 1953-09-22 Khalil Seyed Escapement mechanism for typewriters and the like

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