US1671495A

US1671495A - Combined typewriting and computing machine

Info

Publication number: US1671495A
Authority: US
Publication date: 1928-05-29
Anticipated expiration: 1945-05-29

Description

May 29, 1928. 1,671,495

0. THIEME COMBINED TYPEWRITING AND COMPUTING MACHINE Filed Apr i1 20. 1926 f mvenfarr d] Affar/vey Patented May 29, 1928.

UNITED STATES 1,671,495 PATENT OFFICE.

orro THIEME, or HARTFORD, CONNECTICUT, ASSIGNOR T unnnnwoon COMPUTING MACHINE COMPANY, on NEW YORK, N. Y., A conronn rron on NEW YORK.

COMBINED TYPEWRITING AND COMPUTING MACHINE.

Application filed April 20,

This invention relates to combined type- 1 writing and computing machines of the Underwood-Hanson type, one of which is illustrated in the patent to Grumprecht, N0.

1,237,895, dated August 21, 1917.

The numeral-keys of the typewriter set up pins associated with computing wheels, the set pins being subsequently employed to determine the extent of rotation of the several wheels.

The pin-carrying members are moved to setting positions, one at a time, during the letter-space movement of the carriage, and, finally, the members are all advanced simultaneously by means of a general operator,

which engages the depressed pins and rotates the computing wheels corresponding amounts.

In order that the computing mechanism may be silenced during the movement of the carriage through a computing zone, there is provided a series of selecting tappets which are rockably mounted on a cross-shaft mounted on the carriage, the tappets having teeth which engage with slots in a cross-bar also carried by the carriage and which prevents the lateral displacement of the tappets. On each tappet is pivoted a camming dog which actuates a series of jacks associated with the pin-carrying members. The tappets are held idle by gravity, but are thrown upwardly to their eflective positions by selecting rolls that are mounted at the rear of the carriage.

When tabulating the carriage, especially in long jumps, the tappets are liable to jar loose because of the sudden stop of the carriage. This requires very careful handling of the machine. To guard against this inconvenience there is provided, according to certain features of this invention, a crossbar which extends the width of the machine,

. and is held overlying the tappets in a position to prevent their accidental displacement,

and not interfere with their working displacement. Said cross-bar is easily removed in order to make changes in the setting of the tappets, but is normally held in positively locked position by means of a suitable latch. In order to stiffen the cross-bar, there are provided a plurality of supporting brackets movable to diifere'nt osjtions, so that the brackets will not inter ere with the proper and convenient locating of the selecting tappets.

1926. Serial No. 103,249.

Other features and advantages will hereinafter appear. 4

In the accompanying drawings,

Figure 1 is a cross-sectional view, in elevation, showing the carriage of an Underwood-Hanson typewriting machine, and selecting mechanism controlled by said carriage, the tappets being shown in their ineffective positions.

Figure 2 is a similar view, but shows the tappets in their eifective positions.

Figure 3 is a plan view, showing the tappets and means for preventing their displacement.

Figure 4 is a front view of the parts shown in Figure 3, the front part of the typewriting machine being removed. I

Figure 5 is a skeleton view, and shows the means for preventing the displacement of the tappets. I

Figure 6 is an operating view, showing the flexing of the cross-bar which holds the tappets in their normal positions.

Figure 7 is a cross-sectional view through line 77 of Figure 3.

In order that the pin-carrying members in the computing mechanism may be moved into active positions co-operating with the numeral-keys for the setting of the pins as the carriage is letter-spaced, there is provided mechanism in said Underwood-Hanson machine, which, while not shown in the drawings, is fully described in said Grumprecht Patent, No. 1,237,895. Said mecha nism includes, in addition to the mechanism 90 shown insaid patent, a carriage 10, slidably mounted on rails 11, fast to the machineframe 12. he carriage carries at the rear thereof brackets 13 fast thereto by means of screws 14. Each of the brackets 13 is provided with another bracket 15, which extends outwardly and upwardly at 16. The brackets 15 serve as supporting members for

cross-shafts

17 and 18. Slidably mounted on the shaft 17, there is provided a plurality 190 of tappets 19 which have teeth 20 designed to engage in slots 21 in the shaftor rockbar 18. The tappcts are normally held by gravity in ineffective positions, as shown in Figure 1, but may be swung to efiective 105 working positions, as shown in Figure 2, when a roller 22, revolubly mounted on the tappets 19, engages a zone-controlling roller 23. Each of the tappetfs 19 is provided with a camming dog 24, which engages with no lever-jacks 25, pivotall mounted at 26, and thereby swivels the jac s in a manner to depress links 27, which are effective to move the associated pin-carrying members to their pin-setting positions.

Owing to the fact that the tappets 19 are loosely mounted on the shaft 17, for the purpose of swin ing them out of engagement with the she t 18, to thereby reposition the tappets, it is easy to accidentally throw the tappets out of engagement with the shaft 18 by a violent swinging of the controlling roller 23. It is also possible to displace the tappets when tabulating the carriage, especially when the carriage is jumped over a long distance. When tabulating the carriage, a

tabulator stop 28 is thrust upwardly in front of a carriage stop 29, the escapementmechanism is disconnected from the carriage, and the tappets are liable to be jarred loose, owing to the sudden arrest of the carriage, in which case the tappets might swing upwardly, out of engagement with the teeth in the shaft 17.

According to certain features of this invention, there are'provided a cross or stop bar 30 and means for securing said bar to the brackets 15, which serve also as supporting elements for the

shafts

17 and 18, which are secured thereto by means of the reduced threaded ends 31 and nuts 32. The extensions 16 are provided with holes 33 (Figure 5) for receiving one end 34 of the bar 30 and a lock 35 which is slidably mounted on the opposite end of the bar 30. In order that the lock may be resiliently held either in its open or closed position, there is provided a spring 36 which bears against the lock 35. The spring 36 is held in its normal position by means of screws 37, and has a depression 38 designed to engage in a hole 39 in the lock 35, to thereby determine the operating position of the lock 35. The lock 35 is operated by means of a finger-piece 40, and is slidably mounted on the screws 37 which pass through an elongated slot 41 in the lock. The locking end of the bar 30 has a cut-away portion 42 to receive the end of the lock 35, which is offset at the end thereof, so that the lock and the bar will both be in the same plane.

.In order to hold the bar 30 in a straight condition, and to prevent the same from springing under a sudden impact of the tappets, there are provided supporting plates 43 slidably mounted on the shafts 1'7 and 18, as shown in Figure 5. Said plates are provided with hubs 44 fast to the plates, which hubs serve as the means for holding the plates in vertical positions and provide clearance for the shaft 18 when they are slid along the shaft 17. To further ensure clearance between the plates and the shaft 18, the plates are. provided with downwardly-extending ears 45, which bear upon the carriage-stop rack 46,thereby precluding any possibility of the plates engaging with the slots 21, when moved from 'one position to another to avoid possible interference with a setting of the tappets.

The bar 30 is removed prior to changing the position of the tappets 19, and to this end it is necessary to pull the lock inwardly, and then to flex the bar, as shown in Figure 6, in which position it is then possible to withdraw the bar from engagement within the hole 33 in one of the extensions 16. The bar is then twisted in a triangular hole 47, as shown in Figure 7, so as to facilitate its easy withdrawal from engagemenhwith the plates 43 by passing the bar 30 through an aperture 48.

The stop-bar 30 in overlying the series of tappets 19 provides for a clearance space or gap between the bar and the upper edges of the tappets which permits each tappet to be raised by the roller 23 to compute, but prevents the accidental release of the tappets from the rack-bar 18.

Variations may be resorted to within the scope of the invention, and portions of the improvements ma be used without others.

Having thus escribed my invention, I claim:

1. In a combined typewriting and computing mechanism having acarriage, means for preventing the accidental displacement of swiveled denominational select ng tappets, including a stop-bar movable with the carriage and disposed longitudinally over the tappets.

2. In a combined typewriting and computing mechanism, means for preventing the accidental displacement of swiveled denominational selecting tappets, said means including a fixed cross-bar overlying the tappets, and means for supporting and locking the bar in its effective position.

3. In a combined typewriting and computing mechanism, means for preventing the accidental displacement of swiveled denominational selecting tappets, said means including a fixed cross-bar overlying the tappets, and means for supporting and locking the bar in its effective position, said last-mentioned means including a pair of fixed brackets, said brackets having holes for receiving the ends of said cross-bar, and a locking member for holding said cross-bar in its effective position.

4. In a combined typewriting and computing mechanism, means for preventin the accidental displacement of denominational selecting tappets, said means including a sto -bar, fixed brackets for receiving the en s of said sto -bar, a latch-member for locking said stoper in its effective position, and means for resiliently holding said latchmember in either effective or ineffective position.

5. In a combined typewriting and computing mechanism, means for preventing the accidental displacement of denominational selecting tappets including a stop-bar, fixed brackets for receiving the ends of said stopbar, a latch-member for locking said stopbar in its effective position, and means for resiliently holding said latch-member in either effective or ineifective position, said last-mentioned means including a flat spring fixed to said stop-bar, and screws for holding said spring, the latch-member being slidably mounted on said screws, between the spun and said bar.

6. n a combined t-ypewriting and com-' puting mechanism, means for preventing the accidental displacement of swiveled denominational selecting tappets including a stopbar, end-supporting brackets for said stopbar, said supporting brackets being carried by the carriage, and intermediate supporting brackets for preventing deflection of said stop-bar, between the end-supporting brackets, said inner brackets being slidable along the stop-bar to avoid a tappet position.

7. In a combined typewriting and computing mechanism having swiveled tappets for controlling denominational selecting jacks, said tappets being laterally located by engagement with a fixed rack and being settable by disengaging said tappets from the rack, means for locking the tappets in their effective positions to prevent their accidental displacement, said means including a crossbar and means for supporting and locking the cross-bar in a position to preventthe tappets from disen aging the rack.

8. In'a combine typewriting and computing mechanism having swiveled tappets for controlling denominational selecting jacks, said tappets being laterally located by engagement with a fixed rack and being settable by disengaging said tappets from the rack, means for locking the tappets in their effective positions to prevent their accidental displacement, said means includin end-supporting brackets, a cross-bar over ying said tappets in a manner to prevent the tappets from disengaging the rack, said crossbar being detachably mounted in said supporting brackets, and means for preventing the deflection of said bar, said last-mentioned means including center brackets slidably mounted on a supporting shaft, upon which the tappets are swiveled.

9. In a combined typewriting and con1- puting mechanism having swiveled tappets for controlling denominational selecting jacks, said tappets being laterally located by engagement with a fixed rack and being set table by disengaging said tappets from the rack, means for locking the tappets in their effective positions to prevent their accidental displacement, said means including end-supporting brackets, a cross-bar overlying said tappets in a manner to prevent the tappets from disengaging the rack, said cross-bar being detachably mounted in said supporting brackets, means for preventing the de fiection of said bar, said last-mentioned means including center brackets slidably mounted on a supporting shaft, upon which the tappets are swiveled, and means for locking the cross-bar in its efiective position, said last-mentioned means including a latch slid'ably mounted on the cross-bar at one end thereof, said latch being movable into engagement with a slot in one of the end-supporting brackets, and means for resiliently holding said latch in its efiective position.

10. In a combined typewriting and computing machine having a rack-bar and a series of denominational selecting tappets upon the rack-bar and individually swingable from an inoperative to an operative position to compute, each tappet being also swingable individually a greater distance torelease it for readjustment along said rackbar, and means common to the whole series of tappets to prevent the accident-a1 release of any tappet from the rack-bar while permitting sufiicient swinging of any tappet to compute.

OTTO THIEME.