US1105774A

US1105774A - Variable-throw device.

Info

Publication number: US1105774A
Application number: US675773A
Authority: US
Inventors: Frederick A Hart
Original assignee: JOHN T UNDERWOOD
Current assignee: JOHN T UNDERWOOD
Priority date: 1908-12-10
Filing date: 1912-02-06
Publication date: 1914-08-04
Anticipated expiration: 1931-08-04

Description

F. A. HART. VARIABLE THROW DEVICE.

APILIOATIOH FILED FEB. 6, 1912.

Patented Aug. 4, 1914.

fnventdr W 4. M w By 11135 Attorneys, fl% um UNITED STATES PATENT ()EFICE.

FREDERICK A. HART, or NEWARK, NEW JERSEY, nssrorion. 'ro JOHN T. UNDERWOOD,

on BROOKLYN, nnwxonn.

v I VARIABLE-THROW DEVICE.

Specification of Letters Patent.

Patented Aug. 4, 1914..

Original application filed December 10, 1908. Serial No. 466,886. llivided and this application filed February 6, 1912. Serial 110,675,773.

the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Broadly, my invention has for its object to provide a variable throw device, and to such end the invention consists ofthe novel devices and combinations of devices-hereinafter described and defined in the claims.

The present application is filed as a division of my prior pending application, S. N. 466,836, filed of date December 10th, 1308, title Combined typewriting and computing machine. In the said prior application the variable throw device, which is'made the subject of this application, shown in use as an adjustable means for imparting variable return movements to -the typewriter carriage; or, in other words, for bringing the typewriter carriage to different desired normal ositions toward the right under the constant predetermined movements of the operating lever of the computer.

The improved variable throw device is ca pable of numerous different uses, but, in' so far as its particular application is illustrated in the drawings, it is shown as especially designed for the above noted particular uses.

Inthe accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawin s, Figure'l is a view in left side elevation, s owing the variable throw device designed as above indicated; Fig. 2 is a plan view of the parts shown in Fig. 1, some parts being broken away and some parts in section; Fig. 3 is a vertical section taken approximately on the line 03 m of Fig. 2, but illustrating differ ent positions of the parts; and Fig. 4 is a horizontal view taken approximately on line a w of Fig. 1.

Describing this variable throw device, designed for the particular uses, above stated, a flexible connection such as a tape 0 is attached to the free end of a typewriter line the c", supported by the frame 30. An operat 1ng lever a is mounted on the shaft 0 adjacent to the main gear 0 and the said two elements 0 and 0' are free for independent rotary or oscillatory movements. The operating lever c carries a spur pinion c that is in constant mesh with the main gear c and is adapted to be engaged with a similar spur pinion c which latter also meshes with the main gear 0 This pinion is loosely journaled in the outer extrem- 1ty of a supporting arm 0 which arm, as shown, is bifurcated and straddles the main gear 0 and is loosely journaled on the shaft 0 0 engages the pinion c undcr friction to prevent the said arm from being accidentally moved from any set position on the gear 0. However, the arm 0 may be easily moved so as to set the pinion c in any posit1on deslred on the gear a; and, hence, normally any desired distance away from the pinion c of the operating lever 0.

As is evident, when the operating lever 0 is moved forward or toward the left from its normal position, shown in Fig. 1, the main gear 0 pinion 0 and other parts, driven therefrom, will remain stationary and the pinion 0 will freely rotate until the said pinion 0 is moved into engagement with the pinion 0 whereupon the two pinions, 'by their opposin action or tendency to rotate the gear 0 Wlll lock the said main gear 0 to the operating lever 0 so that subsequent or continued movement of the said operating lever will positively rotate the said gear 0, and parts driven therefrom. In this way, any part which receives movement from the gear 0 may, by a predetermined movement of the operaing lever through a constant are, be given predetermined variable movements depending on the setting of the arm a and pinlon 0 Otherwise stated, the nearer the said pinion c is normally set to the pinion 0 the greater will be the movement which will be imparted to the main gear 0 and parts driven there- Preferably, the supporting armfrom, under a complete predetermined movement of the operating lever between certain points as, for instance, between pomts determined by fixed stops y and 3 It is evident that the frictional engage,

ment between the pinion o and its" supporting arm a, is not at all required or relied upon to prevent movement of the said pinion and arm in respect to the gear 0 at a time when the two pinions a and c are engaged; for, it is well understood that two pinions or gears engaged with each other and with a throw pinion or' gear, will 1nterlock so that no one of the three can rotate in, respect to the other..

The tape a may be s ring actuated, as by the usual carriage fgee. tension, and will therefore operate wheel 0 upon return of lever .0 causing wheel a through pinions c to return the gear wheel a to normal position. e

As already stated, this variable throw device is capable of numerous uses and the particular application thereof, shown in the drawings and illustrated more fully in my said prior application, is only one of these many possible uses.

What I claim is:

1. A variable throw device comprising a main gear, a lever and an arm pivoted on the axls of said main gear, and pinions journaled on said lever and arm, in constant mesh with said main gear and engageable with each other to variably determine, the effective movement of said lever.

2. A variable throw device comprising a main gear, a lever and an arm pivoted on the axis of said main gear,a pinion loosely journaled to said lever, another pinion loosely journaled to said arm but having frictional engagement therewith, said two pinions being in constant mesh with said maingear and engageable with each other to variably determine the efiective movement of said lever, and a gear meshing with said main gear and having connections for transmitting. a variable movement therefrom.

v 3. A variable throw device including a train of independently and loosely mounted toothed members, two of said members continually intermeshing with a third, one of said members being adjustable relatively to the others, and means for moving one of said members idly until all three members become intermeshed for further,- unified movement.

4. A variable throw device including a train of independently and loosely mounted toothed members, two of said members continually intermeshing and all of said members being capable of intermeshing for unified movement, one of said'members being adjustable variably in advance of another of said members that the extent of independ- 'nale 1,1oem4 ent movement of said other member may be thereby regulated.

5. A variable throwdevice comprislng a gear wheel and pinions meshingtherewith, said pinions having idle movement when separate, one of said pinions being variably adjustable as to its position with respect to the other, and means for moving said other pinion into mesh with said adjusted pinion to permit unified movement of said gear and pinions.

6. A variable throw device com rising a gear wheel and pinions meshed therewith,

said (gear and pinions beingseparately jourand said pinions having idle movement when separate, one of said pinions being variably adjustable as to its osition in advance of the idle movement 0 the other pinion, and means for moving said other pinion into mesh with said adjustable pinion to permit unified movement of said gear and pinions.

7. A variable throw device comprising a gear wheel and pinions meshed therewith, supports. for said pinions having the same axis as said gear wheel, said pinions havin idle movement when separate, one of, said pinions being variably adjustable as to its position in advance of the idle movement of the other pinion, and means for moving said other pinion into mesh with said adjustable pinion to permit unified movement of said gear and'pinions,

8. A variable throw device comprisin a I gear wheel, a shaft therefor, an arm an a lever extending from said shaft, said arm and lever each carrying a pinion in mesh with said gear wheel, said pinions being capable of independent idle movement wit respect to each other and said gear wheel, and said arm being variably ad'ustable with respect to said lever to regulate t e degree of movement required of said lever in bringing its pinion into engagement with the pinion on said arm for unified movement of said gear wheel and pinions in the further travel of said lever.

9. In a variable throw device, in combina tion, a shaft, a gear wheel loosely mounted thereon, a lever fast on said shaft, a pinion carried b said lever in mesh with said gear, an arm oose on said shaft, and a pinion carried by said arm in mesh with said gear,

wheel said arm being adjustable with its pinion upon said gear wheel variably with relation to the pinion upon said lever, to {egulate the degree of idle movement of said ever.

10. A variable throw device includin a gear wheel and pinions meshed therewith, said pinions being independently movable, a support for oneeof said pinions to adjust it varlably upon said gear wheel with respect to the other pinion, and an oscillating, lever carrying said other pinion to move it independently into engagement with said adusted pinion for unified movement of said gear wheel and pinions in the continued travel of said lever.

11. A variable throw device having three toothed members capable of independent rotation and capable of locking together forunified movement about a single axis, one of said members being variably adjustable'to regulate the degree of unitary movement of another of said members.

' 12. A variable throw device having three toothed members freely rotatable on separate axes capable of locking togetherfor united movement about a single axis, one of said members being variably adjustable to regulate the degree of unitary movement of another. of said members.

13. 'In a variable throw device, in combination, a shaft, a gear wheel loosely mounted thereon, a pinion meshed with said gear wheel, a lever fast on said shaft and carr ing said pinion, said lever capable of oscillating movement over a determined path,

an arm loose on said shaft adjustable to variable positions relatively to said lever, and a pinion carried by said arm in mesh with said wheel, said pinions when engaged by movement of said lever toward the adjusted position. of said armpermitting further travel of said lever to move said pinions-and gear wheel unitedly.

14. A variable throw device comprising a gear wheel and pinions meshing therewith, said pinions having idle movement when separate, one of said pinions being variably adjustable as to its position with respect to the other, a lever supporting and moving said other pinion into mesh with said adjusted pinion, to permit unified movement of said gear and plnions, and means for retracting said gear wheel upon return of said lever.

15. A variable throw device comprising a gear wheel having means to rotate idly in one direction, and pinions meshing with said gear, sand pinions havin idle movement when separate, one of sai pinions being variably adjustable as to its position with respect to the other, and means for moving said otherpinion into mesh with said adjusted pinion, to permit unified movement of said gear and pinions in the other direction.

In testimony whereof I afiix my signature Witnesses:

W. LEDRUo'r, LOUISE D. MAIEIL