US2209512A - Pbinting tabulator - Google Patents

Description

July so, 1940.-

L. P. CROSMAN PRINTING TABULATQR 2 Sheets-Sheet 1 Filed Nov. 9. 1959 mg mm\ .1 i n uwmufl $3.!

I INVENTOR Loring Bi, Crag "nan zz ATTORNEY Patented My so, 1940 2,209,512 PRINTING TABULATOR Application November 9, 1939, Serial No. 303,567

4 Claims. (01. 197-176) The invention has relation to printing tabulators', being shown as applied to the tabulating mechanism of a listing calculator constructed in accordance with the disclosure of U. S. Patent No. 1,946,572, issued to the present applicant on February 13, 1934.

The invention consists in the novel construction and combination of parts, as set forth in the appended claims.

In the accompanying drawings, illustrating the invention:

Fig. l is a rear elevation of a listing calculatingmachine to which the invention is applied, the casing being removed and parts broken away.

Fig. 2 is a rear elevation of certain parts shown in Fig. l, in position assumed during the tublation of the platen carriage.

Fig. 3 is a detail elevation of the governor and associated parts.

Fig. 4 is a detail-elevation of certain parts operated when the carriage reaches its extreme left hand position.

Fig. 5 is a detail of certain parts shown in Fig. 4, located in normal position.

Fig. 6 is a detail perspective view of the'latch preventing operation of the governor.

The platen carriage of the machine is tabulated from right to left under the influence of a spring drum 8 (Fig. 1) connected to the carriage by a tape 9, the carriage being held in its various tabulated positions by means of a notched bar i mounted in the carriage, the walls of the notches forming spaced stops I93 engageable successively by the end 6 of a detent i.

In the present instance detent I is pivotally supported on a lever fulcrumed upon a ipring tensioned arm 5| forming a yieldable extension of the stationary machine frame. The free end 6 of detent I is held upwardly, in contact with the stop face I93 by means of a spring urged arm 62, connected to the detent by link 63. The detent is disengaged from bar I by downward movement of a member I85, operated in known manner. Upon release of bar I by the end 6 of the detent the carriage will be pulled 'to the lett by the spring drum 8, and the detent, being released by themember I85, will rise under bar I. The carriage having moved sufiiciently to bring one of the notches 2 of bar I into register with.

s t-ion. for which purpose lever 60 and detent i will be moved to the right when the detent is. released from bar I, and after engagement of the detent with the wall of the next notch 2 the final movement of the carriage into tabulating position will be resisted by a braking force applied to the lever 5E3.

Lever St is therefore connected to a ratchet disk' 66 by means of a link 65, said disk ratcheting v idly under the pawls 66 in the movement 60 to the right, this movement being efiected un-= der the influence of a spring 61, attached at one end to disk and at the other end to the framing of the machine. Upon movement of lever 60 to the left, under the influence of spring drum 8,

link 65 will rotate disk 54 from the position shown in Fig. 2 into that of Fig. 1, and the ratchet teeth of the disk will engage the pawls 66 to rotate a gear wheel 68, on which the pawls are mounted. Gear 68 is connected through gearing centrifugal governor comprising pivoted arms F3 and brake shoes it attached to said arms and operating upon a stationary braking surface iii.

of lever w .69, Hi, 1: (Figs. 1 and s) with the shaft 12 of a Thus the final movement of the platen carriage a; into the new tabulating position will move detent 7 and lever 68 to the left, rotating the governor and bringing the brake shoes it into contact with the surface '55, to arrest the carriage movement gradually. In order to keep the action of the governor even the diminishing speed of the 30 carriage is compensated by a relative speeding up of the governor, the link 65 and the lever having a toggle action in moving from the position of Fig. 2 to that of Fig. 1, for this purpose. A

bers fill-and 65 consists in the fact that the minimum resistance to movement of the carriage is exerted at the beginning of the movement, so

further advantage of the toggle action of memthat detent I will be engaged by the stop face 40 I93 quietly and without shock.

A second toggle is formed by link 65 and disk 64, working oppositely to the first named toggle, in that the movement of lever 60 from the position illustrated in Fig. 2 to that of Fig. 1 will be increasingly resisted by the braking action of the 45 governor, because the toggle 6t, .65 will be moving from approximately right angular position into the approximately dead center position illustrated in Fig. 1. Thus the toggle 6t, 65 will be loaded by the governor and the carriage will be brought to rest in an approximately harmonic movement by a substantially uniform resistance, having the advantage over a spring loaded toggle of providing resistance of a non-elasticcharacter, 55-

' whereby the carriage will be stopped at a definite point when the toggle is open, and whereby any rebounding tendency will be eliminated.

Since the lever 39 is mounted on the yieldable arm 9|, shock will be'taken up in case pressure shaft I99 is also provided with an arm I6 (Figs. 1

and 4) having toggle spring connection 11 with a go crank arm 18 of stud shaft I9. Shaft I9 is also provided with an oppositely extending crank arm 89, as seen in Fig; 6, this arm normally lying out of the path of movement of 9. lug 8| of the link I g 63. Upon displacement of roller I9'I by cam I96, 2; arm 89 will be brought into the path of move- 'ment of lug 8| and movement of detent 'I and lever 69 to the left will thereby be prevented.

As the carriage reaches its extreme right hand position a cam similar to the cam I96, but oppogp, sitely disposed (as seen in Patent- No. 1,946,572),

will engage roller I91 and return the parts to normal position, disengaging crank arm 89 from link 33. During this reverse movement of the platen carriage a beveled face of the end 6 of de- 35 tent I will engage the walls of the notches 2 of bar I, and the detent will be cammed downward, out of said notches. As the carriage is released from' the urge of the r'eturn mechanism, 'the wall I93 of the. first notch [will be engaged by detent I and the carriage held in its first tabulating position.

According to. the disclosure of Patent No.

1,946,572,- certain operations of the machine are automatically initiated whenever the car- 3 'riage is brought to rest in a new tabulating position, modified mechanism for this purpose being provided to cooperate with the parts of the present invention.

The desired operations are accomplished by 5 0. the engagement of a clutch 24 (Fig. 1) whereby movement of-a motor driven shaft 41 will be 'transmittedto a shaft 56. Clutch 24 is normally held in disengaged position by means of a detent 39, formed on a lever 33, ifulcrumed at 49 and provided with a pin 31 lying in the path of move.-

ment of an arm 36 of lever 33, which is fulcrumed at 34 on the framing of the machine. Lever 33 has engagement with one of a lever 82, the other 'armof which is provided with a lug nora mally engaging a latch33. A latch release member 94 is pivoted concentrically with the pivot of the latch, the two members being urged toward contacting position by a suitable spring. In the releasing member 84 is held in contact with the lug 3|. of link 63 by. a spring 35. Upon movement of the parts-into the position illustrated in Fig. 2 lug 3| will be withdrawn from member 34 and spring 95 will move latch 93 out of contact with ;the lug of lever 92, and a spring 35 will displace the levers 33 and 82 sufliciently to bring said lug below the shoulder of latch 33, resting upon a shoulder of the member 84. Upon movement of "the parts back from the position illustrated in f" Fig. 2 to that of Fig. 1, lug 8| will contact with normal position of the: parts the free end of themember 34. moving the shoulder thereof out of engagement with the lug of lever 32, whereupon spring 35 will bring the .arm 36 of lever 33 against pin 31, raising detent 39 and allowing the clutch 24 to engage.

Near the end of the cycle of movement of clutch 24, a cam 21", mounted on a disk 55, fast to said clutch will contact with a roller 292 mounted upon lever 293, 'fulcrumed at 49, rocking said lever and thereby through link 294 moving lever 33 back to normal position, latch 93 now engaging under the ing of lever 82 to hold the partsin normal position. This will allow the clutch detent 39 to move into engaging position, under the influence of a spring 295, and release the clutch, terminating the special operationreferred to.

I claim:

1. In a printing tabulator, the combination witha power urged platen carriage having spaced stops, a stationary frame, and a. releasable detent supported from said frame and adapted to engage said stops; of an automatically governed brake, and connections between said detent and the brake, adapted toallow a limited movement of the detent upon engagement thereof with a stop during tabulation, including variable leverage elements adapted to efiect substantially har-' monic deceleration of said movement of the detent during uniform rate movement of the brake.

2. In a printing tabulator, the combination with a power urged platen carriage having spaced stops, a stationary frame, and a releasable detent supported from said frame and adapted to engage said stops; of an automatically governed brake, and connections between said detent and brake, adapted to allow a limited movement of the detent upon engagement thereof with a stop during tabulation, including toggle elements adapted to effect substantially harmonic deceleration of said movement of the detent during uniform rate movement of the brake. 3. In a printing tabulator, the combination with a power urged platen carriage having spaced stops, a stationary frame, and a releasable detent supported from said frame and adapted to engage said stops; of an automatically governed brake, connections between said detent and the brake, adapted to allow a limited movement of the detent upon engagement thereof with a stop during tabulation, including variable leverage elements adapted to eifect substantially harmonic deceleration of said movement of the detent during uniform rate movement of the brake, and spring means operative to impart opposite movement to said detent upon release from a'stop.

4. In a printing tabulator, the combination with'a power urged platen carriage having spaced stops, a stationary frame, and a releasable detent supported from said frame and adapted to engage said stops; 'of an automatically governed brake, connections between said detent and the brake, adapted to allow a limited movement of the detent upon engagement thereof with a stop during tabulation, including variable leverage elements adapted to effect substantially harmonic deceleration of said movement of the detent during uniform ,rate movement of'the' brake, said connections also including pawl and ratchet ele-- nients, and spring means operative to impart oppositemovement to said detent upon release from a stop.

mama momma caosMAN.

Images