US3660640A

US3660640A - Record sensing mechanism

Info

Publication number: US3660640A
Application number: US30612A
Authority: US
Inventors: Paul L Terbrueggen; Georg K Caspari
Original assignee: Burroughs Corp
Current assignee: Unisys Corp
Priority date: 1968-06-12
Filing date: 1970-03-26
Publication date: 1972-05-02
Anticipated expiration: 1989-05-02

Abstract

The disclosure embodies a record processing tool and includes mechanism for activating the tool to detect a code hole in a record medium. The tool is activated by a lever selectively pivoted about one of two opposite-acting fulcrums by cyclically operable means, selection being dependent on the retraction of one of the fulcrums.

Description

O Umted States Patent [:51 3,660,640 Terbrueggen et al. [451 May 2, 1972 [54] RECORD SENSING MECHANISM [56] References Cited [72] Inventors: Paul L. Terbrueggen, Grosse Pointe UNITED STATES PATENTS Farms; Georg K. Caspari, Plymouth, both of Mich. 2,619,532 11/1952 Blodgett ..235/61.l1 C Assigneez Burroughs Corporation Detroit, Mich. 3,118,054 1/1964 Perez ..23$/61.l 1 C [22] Filed: Mar. 26, 1970 Primary Examiner-Daryl W. Cook [21 1 Appl' No: 30,612 Attorney-Paul W. Fish and Edwin W. Uren Related U.S. Application Data ABSTRACT [62] Division of Ser. No. 736,488, June 12, 1968, Pat. No. The disclosure embodies a record processing tool and includes 3,556,396. mechanism for activating the tool to detect a code hole in a record medium. The tool is activated by a lever selectively [52] U.S. Cl. ..235/61.11 C ivoted about one of two opposite-acting fulcrums by li. [51] Int. Cl. ..G06k 7/04 all r bl ea election being dependent on the [58] Field of Search ..235/6l.11 R, 61.11 C, 61.11 B; retraction f n Qfthe fulcrums,

6 Claims, 2 Drawing Figures PATENTEDMAY 2 m2 INVENTORS GEORG K. CASPARI PAUL L. TERBRUEGGEN RECORD SENSING MECHANISM This is a division of application Ser. No. 736,488, filed June 12, 1968, and which is now US. Pat. No. 3,556,396, having been patented on Jan. 19, 1971.

SUMMARY OF THEINVENTION The invention resides in the provision of a mechanism which selectively pivots a lever about one of two opposite-acting fulcrums toactivate a record processing tool.

IN THE DRAWINGS FIG. 1 is a ;plan view of-a record sensing mechanism embodying features of the invention, showing the operating parts of the mechanism in'their normal positions;

FIG. 2 is a side view.

With referenceto FIGS. 1 and 2, the mechanism includes a supporting means -52, a record processing tool or sensing pin 56, a cyclically'operable means 76, and a motion transmitting mechanism 77. The pin '56, the cyclically operable means 76, and the motion transmitting mechanism 77 may be mounted on a pair of upright plates 54 of supporting means 52, of which only one is shown. The pin 56 and the cyclically operable means 76 are spaced apart with the motion transmitting mechanism 77 therebetween.

A rotatable camshaft 98 is joumaled in the plates 54 and may be rotated by any one of many well-known business machine motors. The camshaft 98 has a first or drive cam 51 affixed thereon.

The drive cam 51 is an eccentric having a high point 55 and a low point 53. The drive cam 51 is joumaled in a link 57 pivotally connected to a second rockable lever 72. A first rockable lever 64 is pivotally connected to one end 74 of a second rockable lever 72. When the mechanism is in its normal position, the other end. 63 of the second lever 72 rests upona second stop member 70, which is affixed to the plates 54.

The sensing pin v56 is pivotally connected to one end 59 of the first lever, 64, the pivotal connection forming a first fulcrum 58, and is yieldably urged by a coil spring 84 against a pin return stop member '65, which is affixed to the plates 54. When the mechanism is in its normal position, the end 59 of the first lever 64 rests upon a first stop member 62, which is affixed to the plates 54; and the other end 61 of the first lever 64 is yieldably urged by a coilspring 82 against a second fulcrum 60, which is also affixed to the plates 54.

A control member 68, which may be a switch, is positioned on theplates 54 such that it will be actuated by the end 61 of the first lever 64 as it pivots away from the second fulcrum 60.

A bellcrank 88 is pivotally positioned on the plates 54 such that a projection on the bellcrank 88 forms a retractablefulcrum 89 effective to restrain the end 63 of the second lever 72 from pivoting away from the second stopmember 70 when the bellcrank 88 is rotated toward the second lever 72. The bellcrank 88 is biased in this direction by.a coil spring 94 but is normally held away by a retractable latch 90, retractable by power means 80, which may be a solenoid.

A second or reset cam 96 is also affixed to the camshaft 98. The reset cam 96 is an eccentric having a high point 95 and a low point 97. A cam follower roller 99 is attached to an arm of a tripedal lever 92andis yieldablyurged against the reset cam 96 by a coil spring 67. A second arm of the tripedal lever 92 is pivotally mounted to-the bellcrank 88 at its point of pivotal connection 93 to the plates 54..A third arm 91 of the tripedal lever 92 extends to a position effective to reset the latch 90 to its normal position, supplementing the latch resetting action of the coil spring 87, when the tripedal lever 92 is pivoted toward the latch 90 by the action of the reset cam 96. A stud 83 is affixed to the thirdarm 91 of-the tripedal lever 92 in a position effective to reset the bellcrank 88 to its normal position when the tripedal lever 92 is pivoted toward the bellcrank 88 by the action of the reset cam 96.

A shackle 86 ispivotally, mounted between the second lever 72, at the point of pivotal connection of the link 57 to the second lever 72, and the plates 54, at the pivot point 81.

A perforated backup 69 is secured to the plates 54. Its perforation 71 is aligned to the direction of travel of the pin 56 and elongated in the direction of travel of the record media.

With reference to FIGS. 1 and 2, assuming the mechanism, depicted in its normal position, is in an idle mode, the constantly rotating camshaft 98 rotates the drive cam 51 clockwise; and the link 57 is driven upward, as the high point 55 of the drive cam 51 approaches the uppermost point of its travel, exerting an upward force on the second lever 72 pivotally connected thereto. The second lever 72 is restrained at one end by the weight of the first lever 64 pivotally connected thereto, but the other end 63 is free and moves upward. After the high point 55 of the drive cam 51 passes the uppermost point of its travel, the second lever 72 is lowered to its normal position.

In a sensing mode, the power means 80 is activated, retract- 7 ing the latch 90. With the latch 90 retracted, the bellcrank 88 will be pivoted toward the end 63 of the second lever 72 by the coil spring 94, thus moving the fulcrum 89 into effective position over the end 63 of the second lever 72.

The constantly rotating camshaft 98 rotates the drive cam 51 clockwise; and the link 57 is driven upward, as the high point 55 of the drive cam 51 approaches the uppermost point of its travel, exerting an upward force on the second lever 72 pivotally connected thereto. The second lever 72 is restrained at one end 63 by the retractable fulcrum 89. The other end 74 is forced upward, exerting an upward force on the first lever 64 pivotally connected thereto.

The first lever is restrained at one end 61 by the coil spring 82. The other end 59 is free and moves upward, providing the record medium in the processing station 50 contains a code hole, carrying the sensing pin 56 into agreement with the perforation 71 in the backup 69 as the high point 55 of the drive cam 51 reaches the uppermost point of its travel. After the high point 55 of the drive cam 51 passes the uppermost point of its travel, the first 64 and second 72 levers are lowered to their normal positions.

If the record medium in the processing station 50 does not contain a code hole, the sensing pin 56 will be prevented from moving upward; and the other end 61 of the first lever 64 will be forced upward against the bias of the coil spring 82, activating the control means 68 as the high point 55 of the drive cam 51 reaches the uppermost point of its travel. After the high point 55 of the drive cam 51 passes the uppermost point of its travel, the first 64 and second 72 levers are lowered to their normal positions.

The constantly rotating camshaft 98 also rotates the reset cam 96 clockwise. The high point 95 of this cam 96 lags the high point 55 of the drive cam 51 such that it reaches its up perrnost point of travel after the high point 55 of the drive cam 51 has passed its uppermost point of travel. The action of the reset cam 96 pivots the tripedal lever 92 clockwise, causing the bellcrank reset stud 83 to pivot the bellcrank 88 clockwise, thus retracting the fulcrum 89 from its effective position relative to the end 63 of the second lever 72. The arm 91 of the tripedal lever 92 also supplements the action of the coil spring 87 in restoring the latch to its normal position. By the time the high point 55 of the drive cam 51 reaches its lowermost point of travel, the high point 95 of the reset cam 96 has passed its effective position with respect to the tripedal lever 92; and the bellcrank 88 is once again in its normal position, held away from the end 63 of the second lever 72 by the retractable latch 90.

The function of the shackle 86 is to restrict the motion imparted to the second lever 72 by the drive cam 51 at the pivotal point of connection of the link 57 to the second lever 72 such that this point effectively reciprocates vertically.

What is claimed is:

1. A record media processing apparatus having a sensing station in the record media travel path, comprising supporting means, asensing pin, a first fulcrum on said sensing pin, a second fulcrum on said supporting means, a first stop member on said supporting means, a first lever fulcrumed on said first and second fulcrums to carry and move said sensing pin through a code hole in a record medium and actuate a control member in response thereto, said first lever normally resting on said first stop member and said second fulcrum, a second stop member on said supporting means, a second lever pivotally connected to said first lever, said second lever normally resting on said second stop member and pivotable away from said second stop member relative to said first lever about said pivotal connection with said first lever, a first cyclically operable means operable to pivot said second lever about said pivotal connection, a third and normally retracted fulcrum on said supporting means movable to an effective position to restrain said second lever from pivoting away from said second stop member to effect pivoting of said first lever by said second lever, and power means activatable to move said normally retracted fulcrum to effective position.

2. A mechanism as defined by claim 1 wherein said second fulcrum is movably yieldable by and upon rocking of said first lever on said first fulcrum.

3. A mechanism as defined by claim 1 wherein said sensing pin is yieldable in the direction of travel of said record media.

4. A mechanism as defined by claim 1 wherein a backup member is mounted on said supporting means having a perforation aligned in the direction of travel of said sensing pin and elongated in the direction of travel of the record media.

5. A mechanism as defined by claim 1 wherein said third fulcrum comprises a normally retracted bellcrank pivotable on said supporting means, the inclusion of a retractable latch normally positioned to hold said bellcrank retracted, a tripedal lever pivotally connected to the pivot point of said bellcrank, a second cyclically operable means operable to pivot said tripedal lever about said pivot point of said bellcrank to effect resetting said bellcrank and said movable abutment to said normal positions and operatively connected to said power means.

6. A mechanism as defined by claim 5 wherein said bellcrank is yieldably biased to engage said second lever.

6 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3, 5 Dated March 26, 1970 Inventor(s) Paul L. Terbrueggen and Georg K. Caspari It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Col. 1, line &5, delete "second fulcrum" and insert --third stop member--, line 49, delete "second fulcrum" and insert --third stop member. An actuating arm of the control member 68 is yieldably biased against the end 61 of the first lever 6H and forms a movably yieldable second fulcrum 66 at its point of contact therewith.--.

Col. 2, line 33, after "hole," and before "carrying" insert -pivoting about the second fulcrum 66 and--, line +3, after "82," and before "activating" insert --and the movably yieldable second fulcrum 66--.

Signed and sealed this 6th day of February 1973.

(SEAL) Attest:

EDWARD M. FLETCI'IERJR. ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents

Claims

1. A record media processing apparatus having a sensing station in the record media travel path, comprising supporting means, a sensing pin, a first fulcrum on said sensing pin, a second fulcrum on said supporting means, a first stop member on said supporting means, a first lever fulcrumed on said first and second fulcrums to carry and move said sensing pin through a code hole in a record medium and actuate a control member in response thereto, said first lever normally resting on said first stop member and said second fulcrum, a second stop member on said supporting means, a second lever pivotally connected to said first lever, said second lever normally resting on said second stop member and pivotable away from said second stop member relative to said first lever about said pivotal connection with said first lever, a first cyclically operable means operable to pivot said second lever about said pivotal connection, a third and normally retracted fulcrum on said supporting means movable to an effective position to restrain said second lever from pivoting away from said second stop member to effect pivoting of said first lever by said second lever, and power means activatable to move said normally retracted fulcrum to effective position.