US935600A - Adding-machine. - Google Patents

Description

O. W. GOOGH.

' ADDING MACHINE. APPLICATION IILED OGT. 10, 190 7.

35,6OG I Patented Sept. 28, 1909.

UNITED STATES PATENT OFFICE.

CLAIBORNE W. GOOCI-I, OF LYNGHBURG, VIRGINIA, ASSIGNOR T BURROUGHS ADDING MACHINE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

ADDING-MACHINE;

/ Specification of LettersPatent.

Patented Sept. 28, 1909.

Application filed. October 10, 1907. Serial No. 396,855.

-1nents in ridding-Machines, of which the following is a SPSClfiCHtlOIl.

platen. vide for properly adjusting The present invention relatesmore particularly to the recording or printing mechanism of an adding machine and the object is to provide an improved form of means for regulating the force of the blow of the hammers which drive the type against the This is desirable in order to prothe work'in hand. Thus when a considerable number of carbon copies are to be made greater force in the hammer blow is necessary than when a less number of carbon copies or no carbons at all are to be produced. ()fcotuse with the hammer-actuating devices arranged to elfect a printing blow suflicie'nt for the maximum number of carbon copies the machine would be equipped to perform all sorts of work without absolutely requiring dii'lerent adjustments for different kinds of work in hand. However, the use of the machine with hammer-actuating springs under cX- cessive tension would be productive of undue wear and so it is desirable to provide for regulating the tension of such springs according to the requirements 'of thework to be performed.

In the present instance the'invention is shown and described as adapted to a wellknown form of adding machine,'to-wit the Burroughs machine exemplified in prior patents Nos. 504,963 and 505,078 issued September 12., 1893. It is -to be understood, however, that the inventionmay be adapted to other types of adding machines.

In the accompanying drawings which form part of this specification Figure 1 represents in left side elevation, partly in section, a sutlicient portion of an adding ma-.

chine of the Burroughs type to show the present invention embodied therein; and Fig. 2 represents a partial cross-section of such machine, the parts introduced for carrying out the present invention appearing in rear elevation.

Many of the mechanical. elements illustrated in the drawings do not differ in form the machine to with the driving levers 716, also the latches.

or arrangement from those familiarly employed in the well-known Burroughs machine and hence require no extended discussion although they will be briefly referred to inasmuch as the new parts for carrying out the present invention are more or less directly associated with them.

The reference numeral (300 designates a cross-shaft on which are loosely hung a series of levers 611 with segmental rear ends carrying type plates 618.

he reference numeral 1798 designates a roller platen against which .the type plates are driven by hammers 715, the latter being pivotally mounted and operatively engaged pivotally mounted. The latter have springs 780 con nected with them and tending to impel them rearwardly and thus drive the hammers against the type plates. Said driving levers are normally restrained by latches 717 pivoted upon a suitable cross-shaft and engaging the upper ends of the driving levers respectively. The displacement of these latches to release the hammers is brought about through pawls 718 engaging shoulders of the latches, these pawls being pivotally mounted upon the cross-bar or rod of a bail 719 which vibrates at each operation of the machine. The springs 780 are connected with said pawls so as to serve the double purpose of actuating the driving levers 716 and holding the pawls in engagement with The hammers and their drivers are retracted by a. bail 712 which is connected by a link 729 with a crank plate 801 on a rock-shaft 800 which oscillates in every operation of the machine.

For the purpose of the present invention the driving levers 716 are formed with 'rearwardly extending branches 716 and additional springs 2 are attached to the extremities of these branches, one spring being attached to each driving lever. The forward ends of these springs are fastened to the cross-bar of a bail 3 Whose sidearms are secured to a rock-shaft 4 journaled in the base casting 1065 of the machine. hen the bail is in line with the springs as shown in full lines in Fig. 1 these additional springs have no efl'ectnpon the hammers'or their drivers and the springs 780 act as usual to reduce the hammer blow. These springs 80'are of such tension as to elfect a hammer blow of mmimu-m force as for instance the combination of a hammer copies.

to facilitate this said the hammer blow sufiicient when recording oted hammer or printing to be done without carbon By swinging the bail 3 upward and forward the springs 2 may be put under more or less tension so as to augment the force of the hammer blow, said springs then operating conjunctively with the springs 780 to effect such blow. The swinging of the bail for such purpose is brought about through the turning of the rock-shaft 4 and shaft has one end projecting beyond the base casting of the machine and equipped with a thumb-piece or knob 5. For the purpose of locking the bail in different adjustments there is secured to the rock-shaft just in rear of said knob a segmental plate 6 with a series of perforations or apertures 7 and; there is mounted upon the base casting designed to engage any one of said apertures. The rock-shaft 4: is permitted a slight longitudinal movement sufficient to disengage the plate (5 from said pin or stud so that it may be turned to different positions and the plate reengaged with the stud. A spiral spring 9, surrounding the shaft between the collar thereon and a part of the base casting 1065, normally holds said plate engaged with the stud.

It will be seen that the allove-described constrmztion provides means under control of the operator whereby the force 'of the hammer blow can be readily regulated ac cording to the requirements of the work in hand and thus the object of the invention is fulfilled. lVhile the particular form of means above described is Well adapted to the fulfilment of that object it is nevertheless to be understood that modifications may be made without necessarily departing from the scope of the invention.

What is claimed is:

1. In a machineof the character described, adapted to strike a printing blow, a spring for actuating said hammer, and a second spring acting upon said hammer and adjustable as to tension for varying the force of the printing blow of the hammer.

2. In a machine of the character described, the combination of a printing hammer, a spring for actuating the same, and a second spring acting upon said hammer and adjustable to augment the force of the firstnamed spring in varying degree.

2-). In a machine of the character described, the combination with a platen, type, a pivoted hammer for driving the type against the platen, a pivoted driver for said hammer, a spring for actuatingsaid driver, and a second spring attached to said driver and adjustable to augment the force of the firstmentioned spring in varying degree.

4. In a machine of the character described,

the combination with a platen, type, a piv- 1065 a screw stud 8 for driving the type against the platen, a pivoted driver for said ham-- mer, a spring attached to said driver on one side of its pivot, and a second spring attached to said driver on the other side of its pivot and adjustable to augment the force of the firstanentioned spring in vary ing degree.

' 5. In a machine of the character described, the combination of a printing hammer, a spring acting thereon, an adjustable arm supporting one end of said spring, and means for locking said arm at different adjustments.

6. In a machine of the character described, the combination of a printing hammer, a spring acting thereon, a pivoted arm supporting one end of said spring, a perforated plate moving with said arm, and a pin or -st'ud for engaging any one of the perforations of said plate to lock the arm at different adjustments.

7 In a machine of the character the combination of a printing hammer, a spring acting thereon, a pivoted arm supporting one end of said spring, a perforated plate moving with said arm and also axially movable. a spring resisting axial movement of said plate, and a fixed stud for engaging any one of the perforations of the plate to lock the arm at different adjustments.

8. In a machine of the character described, the combination of a series of printing hammers; a series of springs acting thereon, one for each hammer; a swinging bail supporting the outer ends of said springs, and means for locking said bail at d1fferent adjustments.

9. In a machine of the character described, the combination of a series of printing hammers; a series of springs actlng thereon,-- one for each hammer; a swinging bail supporting the outer ends of said springs, a perforated plate moving with the bail and a stud for engaging any one of the perforations of said plate to lock the bail at different adjustments.

10. In a machine of the character described, the combination of a series of printing hammers; a series of springs acting. thcreon,--one for each hammer; a swinging bail supporting the outer ends of said springs, a perforated plate moving with the bail and axially movable, a spring resisting axial movement of the plate, and a fixed stud for engaging any one of the perforations of said plate to lock the bail at different adjustments.

11. In a machine of the character described, the combination of a series of printing hammers; a series of springs, acting thereon,-one for each-hammer; a swingin bail supporting the outer ends of sai springs, a rock-shaft carrying the ball, a

described,

' perforated plate on said shaft and axially movable, a spring resisting axial movement thereof, and a fixed stud for engaging any vone of the perforations of said plate to lock the bail atdifierent adjustments.

' 12. In a machine of the character described, the combination of a printing hammer,- a spring for actuating the same, a second spring acting on said hammer, and means for varying the tension of said second spring comprising an adjustable arm supp' ing one end.,of it.

scribed, the combination of a printing hammer, a spring for actuating the same, a

second spring acting on said hammer, means for varying the tension of said second spring comprising an adjustable arm supporting one end of it, and means for locking said arm at different adjustments.

13. In a machine of the character de- 14. In a machine of the character described, the combinationpf a printing hammer, a spring for actuating the same, a second spring acting on said hammer, and means for varying the tension of said second spring comprising a pivotal arm supporting one end of it.

15. In a machine of the character described, the combination of a printing hammer, a spring for actuating the same, a second spring acting on said hammer, and means for varying the tensipn of said second s rin com risin a ivota arm su ortin o iie 51d of it, a d iiieans for lockiiig said arm at different adjustments.

CLAIBORNE W. GOOCH.

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