US2620877A

US2620877A - Key actuated punch

Info

Publication number: US2620877A
Application number: US144165A
Authority: US
Inventors: Frank J Furman
Original assignee: International Business Machines Corp
Current assignee: International Business Machines Corp
Priority date: 1950-02-14
Filing date: 1950-02-14
Publication date: 1952-12-09
Anticipated expiration: 1969-12-09
Also published as: DE884124C

Description

2 SHEETS-SHEET l F. J. FURMAN KEY ACTUATED PUNCH WE rr FFH/YK J; fZ/RMHN MM jim ATTORNEY TEE? Filed Feb. 14, 1950 m Jl/11111111 Dec. 9, 3952 F. J, FURMAN KEY ACTUATED PUNCH 2 SHEETS-SHEET 2 Filed Feb. 14. 1950 INVENTOR FRAN/ J. FURM//V ATToRNr-z Patented Dec. 9, 1952 UNITED STATE OFFICE KEY ACTUATED PUNCH Application February 14, 1950, Serial No. 144,165

2 Claims.

This invention relates to key actuated tape punch apparatus for the control tapes used to control the operation of well-known accounting machines and more particularly to arneans of restoring the keys before actually punching the tape.

The principal object of the invention is to provide an economical key actuated punch for punching the control tapes in which it is possible to depress all keys in a column of the tape and check them before actually punching the tape, thereby allowing for making corrections as the keys are set from a chart which is prepared according to a particular job and checking the depressed keys against this chart.

A more specific object of the invention resides in the provision of a release mechanism for releasing the key latch after the depressed keys have been checked and allowing restoration of the keys before the punching operation takes place.

A further object of the invention resides in the novel arrangement of parts controlling the punching operation of the key actuated tape punch app-aratus.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a sectional view of the tape perforating unit showing the keys in a normal, unlatched position.

Fig. 2 is a sectional view of the tape perforating unit showing a key in a depressed, latched position.

Fig. 3 is a sectional view of the perforating unit taken along the line 3-3 o1" Fig. 1.

Fig. 4 is a sectional view taken along the line 4 4 of Fig. 3 showing the key latch releasing mechanism.

Referring now to Figs. l, 2 and 3 the perforating apparatus is shown to include individual punch elements ill, one for each column of perforations, and a common die block I I. The punch elements are slidably arranged in a common punch guide block i2. Each punch element Iii is provided with a ange Ilia which is engaged by one end of o, crank-arm I4. An individual crankarm is provided for each punch element id. Each crank-arm Ii is provided with a yoke portion Elio, a bifurcated portion having arms I/ib and Ilc, an integral lug portion Ild to which is connected a spring I3; an integral flange portion ille and a 2 slotted portion I/if. Punch elements It are normally held in raised positions by the arms of the bifurcated end of crank-arms Ill which are biased upwardly by said springs I3.

An elongated cam or eccentric E5 is carried by, or if desired, formed on shaft I6 which shaft is suitably journalled in side plate 3l and an end plate not shown. The eccentric I5 is located within the bows of yoke portion Mia of the individual and adjacent arranged crank-arms to support and oscillate said crank-arms. Normally, during rotation of the eccentric, the crankarms are moved downwardly and upwardly (see Fig. 1) by the supporting eccentric about the pivotal connections formed by the ends of the crank-arms engaging the flanges ia, of the related punch elements I9, Under these conditions, it is seen, that the free or right hand ends of the crankarms are partially rotated, first in one direction and then the other direction, or stated in other words, the said free ends of the crank-arms are oscillated.

Individual pivoted members or latch arms I9 are provided, one 4for each crank-arm, and are pivotally mounted in a slotted guide block 20 secured to side plate 3l and an end plate not shown. The upper portion IQa of latch `arms I9 comprises a key lever. Near the lower end of each latch arm an offset portion I9b is provided which is disposed in close proximity to, but normally held out of the path of the flanged ends Ide of the crankarms I4 by means of coil spring 2i. suitably disposed stop guides I'I and I8 are provided to maintain proper alignment of the oscillated crank-arms and the latch arms respectively.

Whenever it is desired to operate a punch element I0, the related latch arm I9 is partially rotated in a counterclockwise direction (see Fig. l), against the action of coil spring 2|, so that its offset portion ISb engages and latches the free ilanged end Me of the related crank-arm. In the present embodiment, the shaft I6 carrying the eccentric I5 is not constantly rotated, but operated in a start stop fashion, and the latch arms Iii are arranged to be positioned to latch the desired crank-arms before the rotated eccentric displaces or oscillates the crank-arm. Thus, upon latching of a crank-arm I4 and rotation of the eccentric I5, the crank-arm is positioned, by the eccentric, about the pivotal connection formed by the latch arm I9 and the latched end Ille of crank-arm It, to force the related punch element i@ downwardly (see Fig. 2), thereby causing a sheet, such as a paper tape 3c, interposed between guide block I2 and die block II to be perforated. The eccentric I5 is shaped so that the lower end, or cutting edge, of the displaced punched element is forced through the paper tape, and then retracted therefrom immediately and restored to the normal position shown in Fig. 1. Slotted portion I4f of each crank-arm I4 receives rod 38 which serves as a guide for each oscillating crank-arm.

Locking means are also provided for holding the displaced latch arm or arms I9 in a latched position. This means comprises locking arm 22, one arm being provided for each latch arm I9, and is freely mounted on a shaft 23. Shaft 23 is rotatably mounted on side plate 3'I and an end plate not shown. Locking arm 22 is biased upwardly by means of coil spring 24 secured to release bail 2B, thereby enabling said locking arm to be raised in the path of the latch arm offset portions IBb when the desired latch arms I9 are in a displaced position. Release bail 28 is rigidly secured to shaft 23 by arms 34 and collars 33. Locking arm 22 engages offset portion |91) locking the latch arm I8 in the latching position.

Referring to Figs. 3 and 4, shaft 2G is driven from any suitable source such as a motor and in turn drives shaft I6 through bevel gearing shown at 36 in Fig. 3. Rigidly mounted on shaft 26 is a cam member 25. Release arm 21 is rigidly mounted by means of collar 3I to shaft 23 and is maintained in a normal position by coil spring 32. The raised position of locking arm 22 is maintained until near the end of the cycle of rotation of the shaft I6 when cam 25 strikes release arm 21, forcing it downwardly and thereby rotating shaft 23 in a counterclockwise direction as viewed in Figs. 1 and 2. Release bail 28 will rotate With shaft 23 and lower locking arms 22 to release latch arms I9.

It is desirable in such a key actuated punch to depress all keys in a column of a tape and be able to check them before actually punching the tape. This allows for making corrections as the keys are set from a chart which is prepared according to a particular job and checking the depressed keys against this chart. The prior art has not provided a means whereby the keys may be released before punching when an error is found as a result of the checking of the keys against the chart.

In accordance with this invention, provision is made to positively restore the depressed keys before punching when an error is found. For this purpose release bail 28 has been provided with an error key 29 mounted thereon. When checking of the keys reveals an error, key 29 may be depressed. Release bail 28 will rotate with shaft 23 in a counterclockwise direction (Figs. 1 andv2) which movement will lower locking arms 22 thereby enabling springs 2I to restore related latch arms I9 to their original positions.

While there have been shown and described and pointed out the fundamental novel features of the invention as applied to a preferred embodiment, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art, without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

l. In a key actuated tape punch apparatus comprising a plurality of punch elements, a plurality of crank-arms, each engaging a related punch element, a plurality of pivoted members for latching a related crank-arm, a plurality of locking members mounted on a common shaft for maintaining said pivoted members and said crank-arms in a latched position, a device operative at will for` effecting a restoration of said pivoted members to their original unlatched position, comprising a release bail rigidly attached to the locking member shaft and an error key carried by said release bail.

2. The mechanism of claim l, said locking members comprising individual locking arms, one for each pivoted member, with said locking arms being separately and sequentially operable.

FRANK J. FURMAN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 755,168 Pidgin Mar. 22, 1904 1,800,596 Bryce Apr. 14, 1931 2,346,267 Mills et al Apr. 11, 1944