US1983921A - Canceling machine - Google Patents

Description

Dec. l1, 1934. E. PERSSQN 1,983,921

CANCELING MACHINE Filed April 2l, 1933 :intenter Z1 T1752@ Persson Patented Dec. 11, 1934 vUNITED STATES PATENT oFFIcE y 1,983,921 O ANCELING MACHINE Ernst Persson, Brooklyn, N. Y., assigner to International Postal Supply Company, Brooklyn, N. Y., a corporation of New York Application April 21, A1933,` Serial No. 667,272

The present invention pertains to canceling ma-l chines such as areA employed to mark or cancel letters, checks,` andsimilar matter.

Specifically, the invention relates to trip mechanism designed to permit effective engagement of various elements making up the trip being rather expensive. In the present invention the trip is simplified by the employment of Yfew parts and these are easily assembled, inexpensive, and very effective to cause proper operation of the clutch.

The invention will be more fully understood from the following description, reference being had to the accompanying drawing, in which:-

Fig. 1 is a front elevation, partly in section and partly broken away, illustrating the normal position of the trip and the manner in which it is attached to a canceling machine;

Fig. 2 is also a front elevation of the device, the parts being shown in their respective positions when the trip is first actuated by contact with the edge of a letter;

Fig. 3 is similar to Figs. l and 2, except that the parts are moved to other positions and the edge of the letter has passed the trip;

Fig. 4 is a side view of the device;

Fig. 5 is a sectional view taken on line 5-5 of Fig. l;

Fig. 6 is a top view of the mechanism, partly in section, taken on line 6 6 of Fig. 1;

Fig. 7 is a sectional View taken on line 7-7 of Fig. 5; and

Fig. 8 is a perspective of the trip.

Referring to the drawing, a bracket 10 is adjustably mounted on studs 11 projecting from the machine proper (not shown) and held thereon by set screws 12. Integral with the bracket is a support 13 to which is secured guide plate 14, the forward portion of which is inclined and the rear portion of which is horizontal. The bracket also forms a journal for a constantly rotating shaft 15 on which is freely mounted printing roll 16, the latter being normally engageable with a stop member to permit relative rotation between the roll and the shaft.

As shown in Figs. 5 and 7, there is secured to shaft 15 a metal ring 17, the securing means comprising a pin 18 restrained to rotate With the shaft. Pin 18 is disposed in slot 19 in the shaft and is capable of limited axial movement with respect to the shaft. The metal ring 17 is pressed into contact with washer 2l on'the printing roll by means of a short plunger 22 and spring 23, the compression yof the latter being regulated by a screw 24 threaded into the end of shaft 15. The frictional engagement between ring 17 and washer 21v is such that roll 16 rotates with shaft 15, except when the stop device holds the roll against rotation, at which time the ring will slip relatively to the washer, permitting the shaft to rotate with respect to theproll. t

The stop device consists of a pin '25 or similar abutment on the printingroll and a flat bell crank lever 26 pivoted at 2,7 to frame 10 and serving as a stop pieceto engagevpin 25.` Lever 26 is normally pulled into engagingrelationwith pin 25 by spring 28 connected at one end to the lever and at its other end to support 13. Pin 29 acts as a stop to limit the movement of the lever about its fulcrum.

Fulcrumed at 31 on arm 32 of bell crank 26 is a trip lever or feeler 33 having a depending finger 34 at one end thereof. Finger 34 is disposed angularly to lever 33 and has a relatively wide and fiat face, the bottom edge of which is rounded. This face is normally held in a vertical position, as indicated in Fig. 1, in the path of letters or other matter 35 fed to the printing roll by feed rolls 36, 36' journaled in a part of the machine. The means for sustaining linger 34 in this vertical position comprises spring 37, connected to ear 38 on arm 32 and to the trip lever, and pin 39 on arm 32 against which a lug 41 on the trip lever abuts to limit its swinging movement.

In the operation of the mechanism, assuming shaft 15 to be constantly rotating and the parts to be in the positions indicated in Fig. 1, wherein bell crank 26 engages pin 25 toprevent rotation of the printing roll, letter 35 is advanced horizontally by the feed rolls to engage linger 34. Since the letter strikes finger 34 normally thereto, the trip lever and bell crank are swung counterclockwise about fulcrum 27, thus lifting the bell crank out of engagement with pin 25, as shown in Fig. 2. The printing roll is now free to rotate with friction ring 17 on shaft 15.

As the letter advances, its edge slides under the rounded edge of linger 34. Spring 37 is weaker than spring 28 and, as the letter slides under the feeler finger, the trip lever is rocked in a clockwise -direction with respect to the bell crank and the latter returned to its normal position by spring 28. These relative positions are illustrated in Fig. 3. Finger 34 offers little resistance to the passage of the letter which continues its passage between printing roll 16 and impression roll 16.

When roll 16 has completed a revolution, pin 25 will engage bell crank 26 and prevent further rotation of the printing roll. The letter having passed between rolls 16, 16', the pressure thereof against trip lever 33 having been removed, finger 34 is returned by spring 37 to the position shown in Fig. 1. y L

From the Vforegoing description ofilthe trip release, it will be apparent that the device is extremely simple in construction, the cost of its manufacture reduced to a minimum, and its operation positive. The bell crank and trip lever` are relatively simple stampings which require little machiningV and, with the two springs, form the complete release unit. v

The invention has been described with reference to a preferred form thereof,but it is intended that such modifications as tend to improve or further simplify the device be included in the scope of the appended claims. Y

What is claimed iszi 1. A cancelingfmachine of the class described wherein a constantly rotating shaft is impositively connected to a printing member; an abutment on said member; a bell crank lever fulcrumed on the machine, one arm of said bell crank normally serving as a stop for said abutment; a feeler lever fulcrumed on the other arm 0f said bell crank, said feeler lever having a finger portion normally disposed forwardly of its fulcrum and the printing member in the path of matter passing to said printing member and arranged to rock said bell crank out of engagement with said abutment when said finger portion is moved by said matter; and means for returning said bell crank to its normal position after the forward edge of said matter has passed said nger portion,

2. A canceling machine of the class described wherein aLconstantly rotating shaft is impositively connected to a printing member; an abutment on said member; a bell cranklever fulcrumed on the machine, one arm of said bell crank normally serving as a stop for said abutment; a feeler lever fulcrumed on the other arm of said bell crank, said feeler lever having a finger portion normally disposed forwardly of its fulcrum and the printing member in the path of matter passing to said printing member and arranged to rock said bell crank out of engagement with said abutment when said finger portion is moved by said matter; a relatively strong springY connecting said bell crank to the frame of the machine for returning the bell crank to normal

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