US1024280A - Type-writing machine. - Google Patents

Description

WATNEEEE.

M. W. POOL.

TYPE WRITING MACHINE.

APPLICATION FILED Hum, 1911.

Patented Apr. 23, 1912.

2 suns-SHEET 1.

HEATTDRNEY M. W. POOL.

TYPE WRITING MACHINE.

APPLICATION FILED PEBJ, 1911 1,024,280,v Patented Apr.23,1912.

2 SHEETS-SHEET 2.

INV NTUR.

'l-IIE ATTEIRNEY hUNIIED STATES .PATENT OFFICE.

MORRIS W. POOL, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE` ASSIGNMENTS, TO UNION TYPEWRITER COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

Specification. of Letters Patent.

Patented Apr. 23, 1912.

Application filed February 1, 1911. Serial No. 605,964.

To all whom it may concern:

Be it known that I, MORRIS W. POOL, citizen of the United States, and resident of the borough of Brooklyn, city of New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

My invention relates to paper feeding mechanisms for typewriting machines and its main object is to provide improved clamping and stop devices which are especially adapted for use in connection with stencil sheets or other stiff work she-ets,lalthough various features of said invention may be advantageously employed for controlling thinner sheets than the ordinary stencil sheet.

To the above and other ends my invention consistsin the features of construction, combinations of devices and arrangements of parts hereinafter described and particularly pointed out in the claims.

Vhile my invention may be adapted to various styles of writing machines I have preferred to show it applied to a Monarch front-strike typewriting machine and in connection with clamping and paper stop mechanism of the general style forming the subject-matter of the pending application of Jacob Felbel, Serial No. 604,809, filed January 26, 1911.

In the accompanying drawings, Figure 1 is a fragmentary front elevation of the platen frame and platen of a Monarch typewriting machine embodying my invention. Fig. 2 is a transverse sectional view of said platen and platen frame. Fig. 3 is a fragmentary transverse sectional view taken on planes represented by the broken line .fc-av in Fig. 1 and showing parts in different relations from those in which they appear in Fig. 2. Fig. 4 is a sectional view similar to Fig. 3 but sho-wing a modification. Fig. 5 is a view similar to Fig. 1 but showing still further variations in the clamping and gaging means. Fig. 6 is a view similar to Fig. 2 illustrating in vertical cross section the construction shown in Fig. 5. Fig. 7 is a fragment-ary sectional view similar to Fig. 6 showing the parts in clamping condition. Fig.v 8 is an enlarged detail sectional view illustrating more clearly the card engaging devices shown in Figs. 5, 6 and 7. Fig.`9 is a longitudinal horizontal section illustrating the construction and mode of mounting of the movable or spring-pressed gage bar and its relation to the clamping tongues. Fig. 10 is a similar view showing the fixed gage bar illustrated in Figs. 1 to 4.

Referring to Figs. 1 and 2 of the drawings a rotary platen comprising a sheath 1, a core 2 and platen heads 3 and 4, is supported on an axle 5 provided with finger wheels 6 and bearing in the end bars 7 of a platen frame or carrier which further comprises a connecting slide bar 8 and frame rod 9. The platen frame cooperates through anti-friction balls 81 with fixed track-ways 10 which are mounted on the frame of the machine (not shown). It will be understood that the platen is equipped with usual or other suitable line spacing devices, although these do not appear in the drawings, said devices operating to turn the platen step-bystep in the printing direction. AThe extent of movement of the platen in this direction is limited by a stop finger 11 which coperates with the frame rod 9, said stop finger projecting radially from a circular plate 12 suitably secured to the plat-en head 3. A hand controlled pressure device or rod 13 extends lengthwise of the platen above the printing line and is adapted to coperate with the platen to control the work sheet above the printing line, said rod being adapted to be swung at will toward and away from the platen as shown more fully in Figs. 5 and 6. This rod 13 is secured at its ends to arms 13a pivotally mounted on the cross bar 9, said arms having handles or finger pieces 13b and sleeves 13c which surround and support said arms on the cross bar 9. To one of the sleeves 13c is attached one end of a coiled spring 13d the opposite end of which is secured to the rod 9 and the tension of this spring is such that normally it presses the rod 13 into contact with the surface of the platen.

The stencil clamping devices comprise a plate 14 of spring metal which curves partly around the platen and extendslengthwise thereof. The clamping plate 14 is secured -along one of its longitudinal edges to the platen by screws 15, and is formed with transverse slots 16 to provide a series of parallel tongues or fingers 17 which extend transversely of the platen and the free ends or tips of which co-act with the platen for Iclamping purposes. The stencil clamping plate 14 is arranged midway of the length of the platen and the length of said plate is preferably the same substantially as the length of the stencil sheet that is to be used. The spring of the metal of which the plate 14 is made is sufficient to maintain the tongues 17 normally operative against the platen with a clamping or gripping pressure. In order to open the clamp to permit the insertion of the stencil or other worksheet, hand controlled devices are employed, said devices comprising a rotary cam rod or rock shaft 18 having a flattened face 19, said cam rod being partially seated in a depression in the platen and extending lengthwise of the platen behind the tongues 17 and near the roots thereof. The cam rod bears at its left end in a lug 2O on the platen head 4 while the right-hand end bears in a lug on the plate 12. The bearing end portions of said rod are reduced in diameter so.

as to form shoulders that coperate with the bearings on the platen to prevent endwise movements of said rod. A crank arm 21 having a collar 22 pinned at 23 to the reduced end portion of the rod or shaft 18 at the right of the plate 12, carries a finger piece or handle 24 by which t-he rod or shaft 18 may be turned on its axis. At the opposite side of its axis from the finger piece 24 the arm 21 is provided with branches 25 and 26 which serve as stops, coperating with a stud or stop device 27 on the plate 12 to limit turning movements of the rod or stud 18. When the handle is pushed' rearward so that the stop 25 coperates with the stop 27 the flat face 19 coperates with the spring fingers, permitting said fingers to lie against the platen or closely to grip the paper thereon. l/Vhen, however, the handle 24 is pulled in the opposite direction and the stop 26 brought into engagement with the stop 27, the rod or shaft 18 will be turned until the circular'part thereof engages with the spring fingers. This circular part being farther from the axis of rotation of the rock shaft or rod 18 than is the flat 19, said shaft or rod will in consequence exert a camming action on the fingers and force them away from the platen, thus opening the clamp as/shown in Fig. 2. Prior to the opening of the clamp the platen has preferably been turned forward until arrested by the engagement of the stop finger 11 with the frame rod 9, thus turning the clamp into a position for receiving the stencil plate when it is introduced into the machine between the platen and the pressure rod 13 which is yieldably mounted so that the introduction of the stencil sheet is facilitated. The clamping devices thus far described correspond substantially with those shown in the Felbel application aforesaid, except that the clamping plate is preferably of slightly heavier metal having more inherent clamping power or springiness, and is somewhat wider than the one of the application in order to adapt it for the heavy stencil sheet.

As in the Felbel application, a stop device or gage independent of the clamping fingers, is mounted on the platen. In the present instance said stop device comprises a stop bar or gage 28 which extends transversely of the set of clamping fingers and is arranged near their free ends or tips. Said stop bar or gage is preferably fixed to the platen in any suitable way as by driving it into a kerf or slot cut in the platen sheath, or by fitting it therein and fastening it by screws 28a. The surface of the bar proper may be flush with the platen surface but is formed with a series of stop projections or teeth 29 which project radially of the platen through the slots 16 of the paper clamp and between the tongues 17 thereof. These teetlLor stop devices 29 project outward to such an extent that even when the clamp is fully opened as in Fig. 2, it will not havemoved beyond the ends of the stop teeth. The feature is one to which considerable importance is attached, for the reason that it entirely obviates any chance of the paper or work sheet slipping do-wn past the leading edge stop when the clamp is opened as might occur sometimes in prior constructions. The slipping down is, of course, more liable to occur when the work sheet is thin than wit-h a stencil sheet, and I do not wish to be understood as conning the use of this part of my invention to a stencil clamping device. It will be understood that the toothed stop bar 28, 29, or its equivalent, may be secured to the platen as described, so that the stop projections are immovable with respect to the platen; or, if found desirable, the stops may be movably mounted onl the platen as in Figs. 5, 6, 7, and 9.

As best appears from Figs. 1 and 2 the end tongues of the stencil clamp are each provided near their tips and above the end stop device 28, 29 with inwardly projecting studs 30, the end portions of which preferably engage normally in slight depressions or seats 31 in the platen sheath 1. These studs are adapted to enga-ge the stencil sheet to clamp or hold it positively to the platen. As is well understood, the stencil sheet comprises a rectangular frame 32 usually of rather t-hick cardboard, thin stencil paper 33 being suitably secured to the back of this frame as by an adhesive. In the present instance the lower corners of the frame 32 are punched to provide round holes 34 in which the stops 30 are adapted to fit.

Then the platen has been turned and arrested in the Fig. 2 position and the clamp has been opened as shown therein by pulling forward the handle 24, the stencil sheet is inserted by passing it down between the platen and the pressure rod 13 until said stencil sheet is arrested by the stops 29. In this operation the pressure rod 13 may be swung away from the platen by hand or, if preferable, the stencil sheet may simply be pushed down against the rod 13 with sufiicient pressure to'push the rod away from the platen surface to the extent shown. In order to adjust the stencil sheet in the proper position lengthwise of the platen and so that when arrested by the stops 29, the holes 311 will be opposite the studs 30, a side guide of suitable character is provided to coperate with the left-hand edge of the stencil sheet, the side guide shown in the drawings being mounted on the rod 9 and curving down over the top and front of the platen terminating in the vicinity of the pressure rod 13. After the stencil sheet has been adjusted as shown in Fig. 2 the clamp is closed by pushing rearward against the handle 211, permitting the fingers 17 to swing back toward the platen and engage the lower part of the stencil frame 32. The studs 30 will pass through the holes 34 in the stencil sheet and will seat themselves in the depressions 31 in the platen while in addition the tips or end portions of all of the intermediate tongues 17 will clamp or grip the stencil frame tightly to the platen. Thus it will be seen the stencil sheet will be positively connected at its lower corners to the platen through the studs 30 and will in addition be frictionally clamped all along its lower edge between said corners. Thereafter the platen is turned backward into position to begin the first line of writing. During this backward turning movement the stencil sheet will be fed backward by the clamp and will slide under the stationary pressure rod 13 which will hold it close to the platen. After the first line has been printed the platen may be line spaced, causing the stencil sheet to advance under the control of the clamp; and so on until the writing has been completed, when the clamp may be opened by pulling forward the handle 211 so as to permit the completed stencil sheet to be removed and a fresh one inserted in its place.

In Fig. f1 I have shown a modified construction wherein a clamping plate 36 is secured to the platen as before, but the clamping fingers 37 of the clamping plate 36 are, with the exception of the two outside fingers, bent inward at their tops as indicated at 37a so as to provide angular hook-like portions which are adapted to project inward over and engage flange-like with the top edge of the lower horizontal portion of the stencil frame. Thus the set of hooks 37a and the stop bar 28 will operate to prevent up and down movements of the stencil frame relatively to the platen, and the stencil frame and clamping member will interlock as in the Fig. 3 construction. The stencil frame is held positively connected to the platen all along its lower edge except that the two outside clamping fingers are plain and have no hooks or bends, thus enabling the outside fingers to engage frictionally only with the upright or side portions of the stencil frame 32.

Referring more particularly to the construct-ion shown in Figs. 5 to 8 inclusive, the only changes from the previously described constructions are in the mounting of the stop or gage bar and in the form of construction of the sheet or card engaging devices. The stop bar or gage in Figs. 5 to 9 inclusive is loosely or inovably mounted in the slot 23h and is provided at each end with a lug or pin 28C housed in a depression in the platen and surrounded by a coiled spring 28d which tends normally to press the gage bar outwardly against the spring tongues 17. These tongues or some of them are provided on their inner sides near their upper free ends with sharp points or projections 17 a adapted to pierce and seat themselves into the bottom portion of the card or other substance used to be written upon (as illustrated best at Fig. 8 on a magnified scale) for the purpose of positively impaling, engaging or interlocking with the card or the like to keep it in exact position and against all shifting movements relatively to the gage and the platen while the line spacing and printing operations take place. Preferably some of the spring tongues as shown in Fig. 5 are made wit-hout these impaling or indenting points 17a so that they may engage the card frictionally. Excepting for the variations described the construction shown in Figs. 5 to 9 operates on the same principle as the construction shown in Figs. 1 to 3.

It will be observed that in the several described constructions the paper clamp comprises a plurality of clamping devices or spring fingers, certain of which fingers are provided with devices or projections which project inward past the outer face of the work sheet and positively interlock with the saine; that these devices clamp the sheet positively as distinguished from a mere frictional clamping; also that stops or projections extend radially outward from the platen between the gripping or clamping fingers, and that these stops are of such length that when the clamp is fully opened it will not pass or clear the ends of the stops, so that at no time can the card or sheet slip down past the stops.

Some of the features shown herein are not claimed as they are the invention of Herbert I-I. Steele and form in part the subject-matter of his application, Serial No. 657,439 filed Oct. 30, 1911.

Various changes may be made without departing from my invention.

lVhat I claim as new and desire to secure by Letters Patent, is

l. In a typewriting machine, the combination of a platen, a paper clamp mounted on the platen and comprising a device for positively engaging a work sheet through an opening therein, and means for moving said device .in and out through said opening.

2. In a typewriting machine, the combination of a platen, and a clamping plate provided with a plurality of parallel spring clamping fingers extending transversely of the platen and engagea-ble with one edge of a work sheet, certain of said fingers being provided with projections for positively engaging said work sheet, the platen being provided with depressions for receiving the ends of' said projections.

8. In a typewriting machine, the combination with a platen, a leading end stop, and a side edge guide, of' a stencil clamp mounted on the platen comprising a clamp proper provided with devices for positively engaging openings in the leading end portion of the work sheet.

4t. In a typewriting machine, the combination with a platen, a leading end stop, and a side guide', of a stencil clalnp mounted on the platen comprising a clamp proper having devices for positively engaging openings in the leading end portion of the work sheet, and also hand controlled means for at will opening and closing the clamp.

5. In a typewriting machine, the combi# nation of a platen, a stop bar mounted on the platen and provided with integral stop projections, and a plurality of spring clamping fingers formed on a common support, said fingers being coperative with the platen between said projections.

6. In a typewriting machine, the combination of a platen, a single member provided with a plurality of leading end stops, said member being secured to said platen, and a plurality of spring clamping fingers cooperative with the platen bewteen said stops. 1

7. In a typewriting.machine, the combination of a platen, a clamp mounted thereon and comprising a plurality of parallel clamping fingers extending transversely of the platen, means for moving the fingers away from and toward the platen to open and close the clamp, and a bar seated in a depression in a platen and provided with a plurality of stop projections between said fingers and extending outward past the inner faces of said fingers in both the opened and closed positions of said fingers.

Signed at the borough of Manhattan, city of New York, in the county of New York, and State of New York, this 31st day Aof January A. D. 1911.

MORRIS W. .POOL

Witnesses:

HAROLD E. SMITH, E. M. IVELLs.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D C.

Images