US2546197A

US2546197A - Lock device for printers' chases

Info

Publication number: US2546197A
Application number: US32293A
Authority: US
Inventors: George F Morrison; Herman C Frentzel
Original assignee: MORRISON CO
Current assignee: MORRISON CO
Priority date: 1948-06-11
Filing date: 1948-06-11
Publication date: 1951-03-27
Anticipated expiration: 1968-03-27

Description

March 27, 1951 G. F. MORRISON ETAL 2,546,197

LOCK DEVICE FOR PRINTERS CHASES Filed June 11, 1948 2 Sheets-Sheet 1 INVENTOR.

GEORGE E MoRR/safl Y HERMAN C. FRENTZEL HMMMLLJ ATTORNEY March 27, 1951 G. F. MORRISON ETAL LOCK DEVICE FOR PRINTERS CHASES 2 Sheets-Sheet 2 Filed June 11, 1948 INVENTOR.

. 6502a: E-MonR/sorv BY HERMAN C. FRENTZEL gvfim w, 70 7o ATTORNEY Patented Mar. 27, 1951 I Wisconsin- This invention relate's to imprevements 'in iock "up devices 'for printers chases.

Devices-of this type are use'd for locking up type or printer's form 'in theehase without 'the this type of device,:itis e'entialto i apidly -iadjust the form holding bateplace and -ho'ld them under -ten'si'on, and while under tension to eecurely lock them? Heretofore it has been the practice to adjust the bars by --a rack and pinion o'r worm means andby use of either aquoin and quoin key, pawl and rachet,or separate ratehet forthepinion to lock 'the b'ars in theadju'sted position. These methods of kicking the bars arenot satisfactory.

'The quoins and quoin =keys 'ge't "misplaced, re-

quire too much space and too-"xnuch operating time. "The pawl '-type"of 1ock-'iioes no-tfpe'i mit a sufliciently fine degree of adjustmentto always maintain the bars 'under' tension.

It is an-object of 'this inverition therfoi e'to provide am improved lock *up "aevic'e 'ro'r printers' chases, the bars of which "may be readily "airi-v justed to "an infinite vaii'ty of; positione, lild undertension 'inthedsiid position and locked while under such tension;

Another object of this in VGI itiOniS tfpfdvlfie an improvedlockfiip 'de vicefdr tishgiss which: is simply operateii bjv asing'le' tool and-is easy and com arative-y inexpensive to manufacture. f

' These objects are 'attaiiied 'by pfo'vidin'g longitudinal and 'trahslvrseh which 'fit with-in the chase and areadjusted -1 elatii?e-ly* t'-each other to clamp a pfinfirs "fO'rI'n, S'e't 't'ylw, (51 c'u't and the like withinthe chase. Theinterseting' 'bars are slidably m'ou'nte'd and gii'ided -in a 'member there being four' siich "member'a Each ot the bars is provided witha toothed i a'ck -and each of the member's rotatably ai ris a sfepai ate 'rack meshing pinion hr "each bar g'uidedtherein. Each pinion h as tool engagingiportions by which it may be rritated to adj-ustf-its r eSpectii' -e ba'r In-order' to lock ea'eh -bar imam-fished position-"and while under tension, each of the pinions is' 'pi ovided with a frictional lock or clutch whi'ch upon operation iprevents' Irotation' fof th'e' 'p'iniom In one form, the pinion' has a splii; hiibwhich is ex panded by movable cone t'o' engage the heating for the :pinion and 'fri'ctionall'y resis't rotation thereof. "The cone fits within tlie intetior ofthe hub andwhenmovedialong the axis of thepinion will expand the hub. The aXialm'bvement of the 'cone is controlled by the rotationeta-threa ed operator The 1ock: operatcr:i-scmaxiany Fi 4 is an rilar'ged f a' gmefita ry *secttenm mew-mmnon the line i -=4- of Fig." 1'; V W r i'S "an enlarged r gme tafy' Stibfiail View takenonthelinei f1; H 1

Fig. 6 is aieqtt'em plan'v of the pimdn sho'wn in Fig.1 Wit h tfiecblie aridiifiifafifiif emoved;

Fig. '7 is ayi'ew ineide -eIeVatiOn-pf the pinion 'shown in Figffifancl I p v Fig. 8 is a View in side elevation ofthe "tool" by which the "pinioh and fridti'ohail 106k are '61:!-

ffi e 4 N v Referring to the drawings Joy "reference "nu- "ni'e'r'als "the lock up device isfshoyvnfin position Within thecustomary printefs chase I0. The lockiip aevice consists of longitudinal bars 12 intersecting withtrahsver'se bar's-l 4-. "Atea'chinte eectionthe're is an I "-'shab'ed*me1nber l filfor slid-ably guiding the "intersecting ears. "While only one of each b'ar'aifd onemfember' is shown, inthe complete device-there-are *tw'o longitudinal bafrsehd two transverse bars and-foiiijguiding member's. Each guiding "inmb'ei' is of identical construction. Each' longitudinal bar is of identical construction. Each tran'svefse bar is of identical construction. The description will therefore'be limited-to one ofie'ach of the'se elemerits. When 47116 compi'te "aev-i'ce i S 118 661, "811 opposite end of each bar I2 and an opposite end of each bar I4 is provided with an adjusting screw and locking nut l8, which bear against the inner sides of the chase ill and permit the inner frame to be properly aligned within the chase.

The bar l2 has an upper part 20 and a lower part 22 joined by spacer blocks 2|, so that the bar l4 may slide therebetween. The upper part 20 has toothed rack 24 extending the length thereof. On its lower side it has a longitudinal groove 26 slideably accommodating a pin 28 mounted in member I6 to prevent the rack 24 from being thrust away from the pinion 38. The bar H! has a toothed rack 32 extending longitudinally along its top edge. It also has a longitudinally extending groove 34 slideably accommodating a pin 35 mounted in the member E6 to prevent the rack 32 being thrust away from the pinion 38.

The guide member is preferably formed from a solid block of metal and has two

ways

40 and 42 positioned at right angles to each other. The way 40, which guides the longitudinal bar 52, is formed by two grooves, one cut in the upper surface and one cut in the lower surface of the member IS. The way 12, which guides the transverse bar 55, is cut through the member l6. With this construction, the guide member E6 holds each of the intersecting bars at substantially right angles to each other and permits each bar to be adjusted longitudinally with respect to the member I6.

The member l6, adjacent each of the Ways 4!] and 42, has an aperture forming a bearing for the adjusting pinions. The pinion 3D is rotatably carried in aperture 4 3 and intermeshes with the toothed rack 26. carried in aperture 46 and intermeshes with the toothed rack 32. Each of the apertures i l and 46 are provided with counter bores at each end which provide sufficient clearance for the toothed part of the pinion and for a retaining ring 43 mounted on the hub 5c of each pinion. The pinions are rotatably guided in their respective apertures by the combined engagement between teeth of the pinion and the wall of the counterbore and the outer wall of the hub and the wall of each aperture. The pinions 3i? and 38 are substantially the same in construction with the exception that the teeth of pinion 30 are formed at the top end of the hub while the teeth of pinion 38 are spaced from ends of the hub to permit them to mesh with the rack 32 which slides between the top and bottom of the member 5. Each of the pinions has a pair of recesses 52, which receive prongs if! on a tool 66 whereby the pinions may be separately rotated about their axis to individually adjust each bar.

To look each bar in a desired adjusted position, each pinion is provided with a frictional lock or clutch which operates to prevent rotation of the pinion. This is accomplished by spaced slots 54 in the hub 5%! of each pinion, which permit the hub to expand. In the case of pinion 38, the slots 54 also extend in between the teeth of the pinion in order to provide for sufiicient expansion of the hub.

The hub 5% of each pinion is provided internally with a sloping surface which flatly engages with the surface of an upright cone 56. As the cone 5B is forced axially upwardly within the hub, the portions of the hub between the slots 54 are forced outwardly and frictionally engage the wall .of the respective aperture to prevent the pinion from rotating in the member The pinion 3B is rotatably I6. Axial movement of the cone 56 is controlled by a revolvable clutch operating member. In the exemplification shown, this member consists of a differentially threaded screw 58. The lower threads 60 are right hand and pitched approximately 20 threads per inch. The upper threads 62 are also right hand and pitched approximately 28 threads per inch. The lower threads 60 engage with a threaded bore in the cone 56, while the upper threads 62 threadably engage with the top of the pinion. Upon clockwise rotation of screw 53, it moves downwardly with respect to the pinion, but because of the differential in the pitch of the threaded portions, the cone will at the same time move upwardly with respect to the pinion and at a greater rate. Thus the cone is positively and with mechanicaI advantage moved upwardly to expand the hub of the pinion and also positively moved downwardly to free the cone and permit the hub to retract. The

come 56 may have a pin 65 which rides in one of the slots 54 to keep the cone from rotating as it is moved axially. While this is a preferred form of the clutch operating member, it is not necessary to have a differentially threaded screw. Any screw which threadedly engages the cone and is rotatably mounted in the pinion and held there against axial displacement, or which is fixed to the cone and threaded in the pinion, will function in substantially the same way. The essential characteristic is to have the clutch operating member control the clutch movement by its rotation with respect to the pinion, thus permitting the pinion to be held by one portion of a tool while another portion of the same tool can simultaneously control the clutch operating member. The screw 58 is provided with a hexagonal recess 64 to receive the tool for rotating the screw.

The tool 66 for operating the pinion and the friction clutch operating member consists of an outer member 68, which has a pair of depending prongs 1E3, engageable in the recesses 52 of the pinion, and an inner member 12 co-axially rotatably mounted in the outer member 68 which has a hexagonal stub 74 at its lower end fittable in the recess 64. A large disc 76 is attached to the upper end of the outer member 68, and a smaller disc 18, superimposed on the large disc 76, is attached to the inner member '12. The tool, when positioned on a selected pinion, simultaneously engages with the pinion and with the clutch operating member. The pinion is rotated through force applied to the large disc 16 until a respective bar is adjusted to the desired position. With the large disc held under tension in the adjusted position, the smaller disc 18 may be rotated by force to turn the friction clutch operating member and lock the pinion in the adjusted position.

Although onl one embodiment of the invention is shown and described herein, it will be understood that this application is intended to cover such changes or modifications as come within the spirit of the invention or scope of the following claim.

We claim:

In a lock up device for a printers chase having a bar adjustable within the chase to engage a form or the like, a rack and pinion operable to adjust said bar to selected position within said chase, said pinion having a split hub, a cone axially movable in said hub to expand said hub and prevent said pinion from rotating, a threaded member carried by said pinion and engageable with said cone to cause axial movement thereof 5 upon rotation of said member, and means acting between said cone and said hub to prevent said cone from rotating with respect to said hub.

GEORGE F. MORRISON. HERMAN C. FRENTZEL.

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

Number 6 UNITED STATES PATENTS Name Date Andrews July 18, 1916 Kyle Jan. 5, 1926 Varcoe et a1 Oct. 17, 1933 Matthies June 11, 1940 Parkhill Jan. 20, 1948 Hilland Sept. 14, 1948