US702748A - Type-writing machine. - Google Patents

Description

INVEN T'DR No. 702,748. Pat'nfed Iunel'l7, |902. C. H. SHEPARD.

TYPE WRITING MACHINE. Y (Applicatipn led Apr. 1, 1901.) (N0 Model.) 3 Sheets-Sheet I,

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TYPE. WRITING MACHINE. `(Applitaaimm led Apr. 1, 1901.)

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No. 702,748 Patented lune I7, |902. C. H. -SHEPAHIL' TYPE WRITING MACHINE.

(Application led Apr. 1, 1901.)

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,v1-h5 A TTDRNE'Y *UNITED STATES.-

PAT'ENT OFFICE.

CHARLES H. SHEPARD, OF BROOKLYN, NEW YORK, ASSIGNOR TO WYCKOFF,

SEAMANS 'du BENEDICT, OF ILION, NEW YORK, A CORPORATION OFA NEW` YORK.

TYPE-WRITING MACHINE.

SPECIFICATION' forming part of Letters PatentNo. 17102,7'48, dated J une 17, 902.

@prima nea April 1, 1901:

serial No. 53,849. (No modem To all whom it may concern:

Beit known that I, CHARLES H. Simmel), a citizen of the United States,.andfa'resident of the borough Aof Brooklyn, city of New York,

in the county of Kings and State of New York,

have invented certain new and Vuseful Improvements in Type-Writing Machines, of which the following is afspeciication.

This invention relates to the carriage-feedro ing mechanism of type-writing machines.

The object of my invention is to provide a -feeding mechanism in which the spring-propelled carriage shall be releasedfor its feeding movements during the up key-strokes in the usual manner when the keys are operated at moderate speed,butwhich shall bereleased during the down key-strokes when the keys are operated at high speed, so as to insure in the latter case-a quick release of the carriage, zo and hence avoid overlapping of the type-impressions. In other "words, theobject is to provide a feeding mechanism which shall af-v ford either the natural feed i or the reverse feed of the carriage, according to the z 5 rate of speed at which the keys are operated,

the determination between the reverse feedr and the natural feed being made automatically at each key-stroke.

Myinvention consists in certain features of 3o construction combinations of devices, and arrangements of parts,` all as will be hereinafter fully set forth, and particularly pointed out in the concluding claims.

Certain features shown and described herein are made the subject-matterof mypending application,`Serial No. 4,847, filed February 12, 1900. n f

In the accompanying drawings,Figure 1 is a vertical section taken longitudinally of a 4o Remington No. 6 type-Writin g machine, showing my improvements applied thereto, the parts being shown in normal position. Fig. 2 is a rear view showing the carriage-feeding devices in normal position. Fig. 3 is a perspective view showing the position of the carriage-feeding devices after a key has been quickly depressed. Figs. 4,5, 6, and 7 are diagrammatic plan views of the feeding-dogs, showing their successive positions at succes- 5o sive points in the operation of the keys, the views also showing in section the teeth of the escapement-wheel. By these figures is illustrated the manner ofjprodueing the natural feed. Figs. 8, 9, 10, and 11' are Views similar to views 4, 5, 6, and 7, but showing the successive positions of the parts during thereverse-feed action. View of a detaining-dog. Fig. 13 is an enlarged side view of the feeding devices shown at Fig. 1, the dog-rocker being shown in its forward position. I

Iny the several views similar parts are diesignav'ted by similar numerals of reference, and portions of the machine not connected-with the invention are omitted. l A

1 designates a platen whichV is .mounted upon a longitudinally-traveling carriage 2, propelled by a spring 2 and having a rack 3, which meshes with a pinion 4, supported upon a bracket 5 and connected to an escapement wheel or rack 6 by the usual vshaft-andratch-et mechanism. Type-bars 7 are mounted upon a top plate 8 and connected by rods 9 to levers 10, having at their forward .ends keys l1 and fulcrumed at their .rear ends on a bar 12. Saidbariis formed integrally-with a base 13,`from which:` rise corner-posts 14,

-surmounted by the top plate 8.', Thekey-lev ers operate a `universal bar, 15.,l which 'is hung by hooks 16 upon branches 17.0f adogrocker, the latter comprising a forwardly-extendingoarm `19 and an upwardly-extending arm 2O and being pivoted at 18 upon a bracket 21 and having a returning-,spring 22. Projecting from the upperl end of the rocker-arm 20, which vibrates transverselyof the rack 6, is a pivoted feeding-dog 23, Which'is pressed by a flat spring 24,toward the right at Fig. 2

or in a direction opposite to the movement of the rack-teeth. All of the parts above described are common in use in said Remington machine. ,y l

An upwardly-projecting detaining-do`g25, which stands behind the feeding-dog 2 3and is normally out of engagement 'with the escapement-wheel, is fixed upon the upper portion of an arm or lever l26, Whichis pivoted upon a shoulder-screw 27, the latter being tapped into an arm 28, fixed upon the rocker 20, and the axis of the screw being transverse to the rocker-axis 18. Said pivoted 'arm 26 is bent into the shape of an inverted U and Fig. 12 is a perspective` 8oVA has at its free end a tooth 29. This tooth normally engages a catch 30, so as to maintain the arm 26 and the detent-dog 25 in a liXed position relatively to the rocker 20. The hub 3l of said arm 26 is of sufficient length to prevent lateral displacement thereof during the operation of the rocker. Normally the detent 25 stands a trifle to the left when viewed from the rear of the escapement-wheel tooth a, the next tooth in advance, Z), being engaged by the feeding-dog 23.

When the dog-rocker is moved forward by reason of the depression of a key ll, the feeding-dog 23 escapes from the tooth b and springs opposite the notch between the teeth a and b, while the detent-dog 25 swings into the same notch-that is, to a position in advance of the tooth a, as at Fig. 5, thereby detaining the rack or wheel 6 while the type impression is being made. During the return movement of the rocker, which takes place upon the upstroke of the key ll, the feeding-dog 23 moves into said notch, as at Fig. (i, while the detent 25 moves out, thereby releasing the tooth ct and enabling the carriage to advance a letter-space or until the tooth a is arrested by the feeding-dog 23, which, it will be understood, yields to a limited extent under the rack-tooth pressure caused by the carriage-propelling spring. The operation just described is well known and affords the ordinary or natural feed of the carriage.

The catch 30 above referred to is pivoted at 32 upon thelower end of the rocker 2O and is maintained in its normal position with relation to the rocker by a forwardly-pressing springr 33, which is attached to the rocker by screws 34. The latch and rocker move together as one piece when the machine is operated at moderate speed, so that the detent- (log 25 is maintained in a fixed relation to the rocker, thus causing the parts to operate as a natural feed, as above described.

To au arm 35, formed upon the catch 30, is pivoted the rear end of a link 36, which connects the catch to a lever 37, whose upper end is pivoted at 38 to a lug on the fixed bracket 2l and whose lower end is pivotally attached at 39 to the rear end of a rod 40, which projects from a piston or plunger 4l, working in an air-cylinder 42 and acting as a retarding device for the catch under certain conditions. Said cylinder is secured by forked ears 43 and screws 44 upon the forward vertical face of the bracket 2l, and is provided with a vent 45, the size or capacity of which may be regulated by a screw 46.

During the forward vibration of the dogrocker the piston is moved by the link 36 and lever 37 from normal position, as at Fig. 1, forwardly to the full-line position at Fig. 13. Vhen the rocker is operated at moderate speed, the air contained in the cylinder has time to escape through the vent 45, and hence the piston does not react to disturb the relation of the catch 30 to the rocker 2O and dog 25, so that the piston reciprocates idly in the cylinder. When, however, a key is struck sharply and the dog-rocker is hence vibrated suddenly, the air conned in the cylinder checks the pistou, so that the latter is not able to keep pace with the quick movement of the dog-rocker, and hence the spring 33 yields and the lever 37, link 36, and catch 30 are moved either slightly or not at all from their normal positions, as illustrated in dotted lines at Fig. 13. Owing to this failure of the latch 30 to move with the dog-rocker the tooth 29, which normally affords a support or lock for the detent-dog, is withdrawn from its notch 30 in the catch 30, thus leaving the arm 26 free to vibrate independently. As soon as the dog 23 escapes the tooth a of the wheel contacts with the detent-dog 25 and vibrates the latter upon its pivot 27, as at Figs. 3 and 9. 'lhus the carriage is released for a forward movement during the downstroke of the key. Upon relief of the key from pressure the dog-rocker returns to normal position, the feeding-dog 23 entering the notch between the teeth CL and ZJ in the escapement-wheel, as illustrated at Fig. lO, and the detentdog 25 finally escaping from the tooth a and being swung by a spring 47 to a position opposite the next notch in the wheel, as

at Fig. 1l. The detent 25 is provided with an ear 25, which extends beneath the path of movement of the teeth of the escapementwheel and up on the forward side thereof, where it projects in the plane of vibration of the feed-dog 23 in the movement of the latter transversely of the machine and engages the feeding-dog 23 and forces it to move in unison with the detent 25 when the latter is vibrated by the carriage, as at Fig. 9, thus insuring that the feeding-dog 23 shall enter the notch in the wheel from which the detent-dog 25 escapes, as at Figs, l0 and 11. One end of the spring 47 is attached to an arm 48, formed upon the detent-arm 26, and the other end thereof is attached to a pin 49, fixed upon the dog-rocker. During the movement of the arm 26 the tooth 29 thereon is brought upwardly into register with the notch 30a in the latch 30 and thereupon is rengaged to the latter. Thus itwill be seen that during moderately-fast operation of the machine the piston 4l reciprocates idly and the carriage is released for an advance movement at each upstroke of the key, while during a rapid operation ot' the machine the release of the carriage is effected during the down or printing stroke of the key, and hence the carriage is enabled to complete its feeding movement by the time the succeeding type impression is made. tomatically whether the carriage is to be released before or after the type im pression and hence is well adapted to both low-speed and high-speed work. On the one hand the carriage is not released during the printing stroke of the type-bar when the latter is moved slowly, and hence there is no danger of blur- Thus the mechanism determines au- IOO IIO

'roar-1s ring, and, on the other hand, the carriage is not unduly held backwhenthe Vkeys are operated at high'speed, as Vin natural-feed machines, and ample time is afforded for the feeding movements of the carriage, While owing to the speedof key operation there is little or no danger of types beingheld against the paper for such a length of time as to-cause blurring or ghosting.

It will be seen that if the vent 45 should be entirely closed by the screw 46 therecould be but very slight, if any, movement of the piston 41, 'and as a result the mechanism would always aord a reverse feed,"no matter howr` keys. Thus it will be seen that the machine.

can be adjusted to afford either reverse feed at all speeds or naturaly feed at all speeds and that it may also be adjusted to secure an automatically-convertible feed--that is, one in which the mechanism determines automatically at each key-stroke whether a natural feed or a reverse feed shall take placeand it will further be "understood that the rate or standard of speed at which the mechanism will give a reverse feed may be determined by the degree of adjustment of The screw 46.-

Referring to Fig. 2, it will be seen that pivoted upon a fixed bracket 50 is a gravitypawl '51, which has a stop -lug 52 normally contacting with the bracket. This paWl is adapted to engage the rear vfaces'ofv the teeth' of the escapement-wheel 6, so as to prevent backward movement thereof when the carriage is being pushed back to begin a new line.

Various changes in details of construction and arrangement maybe made Within the scope of my invention.

What I claim as new, and desire to secure by Letters Patent, "isl. Ina type-writing machine, the combination of a carriage,an escapement-rack,a yielding dog normally disengaged from the rack, means for moving said Vdog into engagement with the rack, means for preventing' said dog from yielding under the pressure of the rack, and an air-check for releasingsaid dog.

2. In a type-writing machine, the combina` tionof a carriage, an escapemen't-rack, a yielding dog normally disengaged from the rack, means for moving saiddog into engagement with the rack, a catch for preventing said dog from yielding under the pressure of the rack, and a retarding device connected with said'catch and which may operate automatically to withdraw said catch so that thedog' may yield under the rack-pressure.

3. In a type-writin g machine, the combinationof a carriage,an escapement-raclna yielding dog normally disengaged from the rack', a catch for preventing said dog from yielding under the pressure of the rack, and an aircheck connected to said catch sofas -to causeit to release said dog during a quick move-- ment of the latter into engagement with the j rack.

4E. In a type-Writing machine, the combination of a carriage, an escapement-rack, a keycontrolled rocker, a yielding dog carried by said rocker and'normally disengaged'from the rack, a catch upon -said rocker for preventing the dog from yielding under the pressure of the rack, and an air-check for releasing said catch. 1 A

5. In a type-writing machine, the combination of a carriage, an escapement-rack, a keycontrolled rocker, a yielding dog carried by said rocker and normally disengaged from the rack, a catch upon said rocker forlprevent` ing said dog from yielding under the lpressure of the rack, and an air-check mountedfupon the framework of the machine and connected to said catch so as to cause the latterto release the dog when said rocker is quickly actuated. y

6. In type-Writing machine, the combination of a carriage, an escapement-rack, a keycontrolled rocker which vibrates transversely of the rack, a dog independently movable IOO upon said rocker and normally disengaged from the rack,'means for preventing independent movement offsaid dog, and an aircheck for releasing said dog. l

'7. In a type-writing machine, the combination of a carriage, an escapement-rack, a '7i rocker which vibrates transversely ofJ said l rack, two yielding dogs mountedfupon said rocker, means for preventing one yof said dogs from yielding under the pressure of the rack,

and an air-checkfor releasing saiddog.

IIO

8. In a type-writing machine, the combina-V- tion of a carriage', an escapement-rack,` a

rocker which vibrates transverselyof the rack, a dog pivoted upon an axis transversely .to the rocker-axis and normally disengaged 'slow movement of' the rocker and releasing said dog during a quick movement @of the rocker,and a spring for returning saiddo'g to normal position upon said rocker.` 9. In a type-writing machine, thecombination of a carriage, an escapement-rack,a

rocker vibrating transversely of said, rack, a y

dog pivoted upon said rocker and normally disengaged from the rack, a catch also mounted upon'said rocker for'prev'enting a pivotal y;

movement of said dog,a*spring for maintaining the connection 'of said catch with said dog, and an air-checkmountednpon the framework of the machineand connected to said catch.

10. In a type-writing machine, the combination of a carriage,escapement-rack 6, feedingdog 23 normally engaging said rack, rocker 2O upon which said feeding-dog is mounted, spring-actuated dog 25 normally disengaged from said rack and mounted upon arm 2G which is pivoted upon said dog-rocker, tooth 29 upon said arm, catch 30 pivoted upon said dog-rocker and engaging said tooth, spring 33 mounted upon said rocker and actuating said catch, cylinder 42 mounted upon the framework of the machine, and piston 41 connected to said catch and working in said cylinder.

11. In a type-Writing machine, the combination of a carriage, escapement-rack ,feedingdog 23 normally engaging said rack, rocker 20 upon which said feeding-dog is mounted, spring-actuated dog 25 normally disengaged from said rack and mounted upon arm 26 which is pivoted upon said dog-rocker, tooth 29 upon said arm, catch 30 pivoted upon said dog-rocker and engaging said tooth, spring 33 mounted upon said rocker and actuating said catch, cylinder 42 mounted upon the framework of the machine, piston 41 in said cylinder, lever 37 mounted upon the framework of the machine and connected to said piston, and link 36 connecting said lever1 to said catch.

12. In a type-writing machine,the combination of a spring-propelled carriage,an escapement-rack, a yielding dog normally disengaged from the rack, a cooperating dog normally engaged with the rack, means for moving said yielding dog into engagement with the rack and simultaneously movin g the other dog out of engagement with the rack, and adjustable means for causing said normallydisengaged dog either to withstand the rackpressure, thus aording a natural feed of the carriage, or to yield under the rack-pressure, thus affordinga reverse feed of the carriage, the range of adjustment being such as to enable the mechanism to aiford either a natural feed at all speeds of operation or a reverse feed at all speeds of operation, or an automatically-convertible feed.

13. In a type-Writing machine,the combination of a carriage, an escapement-rack, a keycontrolled rocker which vibrates transversely of the rack, coperating dogs upon said rocker, and adjustable means for causing said dogs to afford either a natural feed at all speeds of operation or a reverse feed at all speeds of operation, or an automatically-convertible feed.

14C. In a type-writing machine,the combination of a carriage, an escapement-rack, a dog normally engaging the rack, a yielding dog normally disengaged from the rack, means for moving said yielding dog into engagement with the rack and the other dog out of engagement with the rack, a catch for preventing said yielding dog from yielding under the rack-pressure, and adjustable means for releasing said catch, the construction being such that said catch is released or not according to the rate of speed at which the mechanism is operated, and the release being effected at lower or higher speed according to the adjustment.

15. In atype-writing machine, the combination with a carriage, of an escapement-rack, a key-controlled rocker vibrating transversely of said rack, cooperating dogs upon said rocker, one of which is normally in engagement with the rack and the other of which is yielding, a catch for preventing said yielding dog from yielding under the rack-pressure, and adjustable means for releasing the dog from said catch, the construction being such that the dog is released or not according to the speed ot' operation of the rocker, and the release being effected at lower or higher speed according to the adjustment.

16. In a type-writin g machine,the combination of a carriage, an escapement-rack,ayielding dog normally disengaged from the rack, means for moving said dog into engagement with the rack, a catch or lock for said dog, an air-check for releasing said dog from the control of said catch or lock, and an adjustable vent for said air-check.

17. In a type-writing machine,the combination of a carriage, an escapement-rack, a keycontrolled rocker, a yielding dog carried by said rocker and normally disengaged from the rack, a catch upon said rocker for preventing the dog from yielding under the pressure of the rack, an air-check for releasing said catch, and an adjustable vent for said air-check.

Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 30th day of March, A. D. 1901.

CHARLES H. SHEPARD.

Witnesses:

K. V. DONOVAN, E. M. WELLs.

IOO

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