US RE13832 E
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J. VAALER. TYPE WRITER DESK. v APPLICATION FILED Efls, X914 Reissued Nov. 24, 1914. 1 3,832.
s SHEETS-SHEET 1.
J. VAALER. l TYPE WRITER DESK. APPLLGATION'F'ILED Emma, 1914.
Reissued Nov. 24, 1914. l 3,8 3 2 3 SHEETS-SHEET s.
lUNiTiin 'sTATiis PATENT orFioE.
JENS VAALEB, OF CHICAGO, ILLINOIS, ASSIGNOR T0 THE CLEMETSEN COMPANY, 0F
CHICAGO, ILLINOIS-A CORPORATION-OF ILLINOIS.
original No, 1,025,664, dated August 13,
To all whom it may concern:
Be it known that I, JENs VAALER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Type-Writer Desks, of which the'following is a specification.
My present invention "is an improvement in the mechanism of United States Letters Patent No. 934,861, granted to me September 2l, 1909; and it relates, particularly, to improvement in the locking means for securing the carriage in its advance position preparatory to raising the type-writer platform and against rearward displacement by such raising; the object being to simplify the construction of the locking means and improve the operation thereof in automatically locking the carriage in the Vposition stated and releasing it by lowering the platform to the position from which it is moved backwardly into the housing.
In the accompanying drawings, Figure 1 is aview in sectional elevation of a deskpedestal equipped with the mechanism of said patent in its improved form, the section being taken on line 1, Fig. 6; Fig. 2 is a side view of the said pedestal with a wall broken away to show the mechanism within 1t in elevation in the position of the parts represented in Fig. 1, namely with the platform' in its lowered and housed position; Fig.- 3 is a similar view showing the platform in its withdrawn and raised position; Fig. 4 is a section on line 1, Fig. 6, like. Fig. 1, but broken and showing the yposition of the parts when the platform has been withdrawn and raised; Figs. 5, 6 and 7 are broken sections taken, respectively, on lines 5, 6 and 7 .I the locking-lever 4 While, asstated in the aforesaid patent,
`are fastened Fig. 4, and Fig. 8 is a perspective view of device.
the invention is notonly applicable to a desk-typewriter but is equally applicable to'other devices adapted to be used in connection with and housed within a\cabinet, pedestal or the like, the following description is confined to the mechanism in the pedestal of a desk.
` Corresponding rails'8, i8, forming a carriage-track, are secured to the inner faces of the opposite sides of a desk-pedestal, and at their outer ends to the front l posts 9 of the pedestal at circular recesses 10A Specification of Ressued Letters Patent. Reis-Sued NOV. 24, 1914.
1912, Serial No. 696,592. Application for reissue ledebruary 13,
Serial No. 818,609.
in their rear faces, each shown to be provided with an odset` 11 at its inner upper portion and immediately adjacent to the rear face of each front post the rail thus fastened thereto is provided in its lower edge with notch 12 forming a catch for the purpose hereinafter explained. The rails are additionally supported, between their ends, by hanger-bars 13.
The carriage is a pair of similar metal plates 141-, lll, of general rectangular shape,- each terminating at its forward end in a nose 15, these plates being rigidly connected near-'their rear ends by a rod 16l bent into yoke-shape, each plate carryin g on the outer face of its rear lower corner a peripherallygrooved guide-wheel 17, above which and to one side of its center projects a headed stud 1.8; and a similar guide-wheel 19 is journaled on the diagonally-opposite corner of each carriage-plate. 'l'he carriage is confined on the track to ride thereon by embracing each rail 8 between the grooved wheels on a plate or side, the stud 18 on the latter preventing the carriage from leaving the track. Similar bell-cranks 20, 20 are journaled at their angles to the noses 15 of the two carriage-plates at their inner faces, and other bell-cranks 21, like the vforward ones, are journaled at their angles to the inner faces of the plates near their rear ends, in horizontal alinement withtlie journals of the forward bell-cranks; and the longer arms of the bell-cranks 21 are connected between their ends by a cross-rod 22, the members 20l and 21 of each pair of the bell-cranks being pivotally connected at the ends of their shorter arms vby a. bent link Q3. Spiral springs, 24, 24 connectthe cross-member of the rod 16, near its ends, with the rod Q2. The platform 25 is firmly secured at its edges to bars 26, each' pivo-tally connecting the members of a pair of the bell-cranks 20,
21 at the ends of their longer arms, these fers only in minor details from that shown in the aforesaid patent, except as to the notches l2, which perform an important function presently to be described.
On the outer face of the longer arm ,of
each bell-crank 20, and about midway between its ends, projects a stud 30, and a stud 31 projects from the outer face of each carriage-side, or plate 14, to which latter is fulcrumed between its ends a lever 32 of the preferred shape best shown in Fig. 8,-having an expanded and relatively heavy rear-end portion, a recess 33 in the upper edge of its forward-portion toclear the stud 31, a tongue or pawl 34 adj acent'to the recess to enter a notch 12, and a latch 35 to engage a.
stud 30, this latch extending from a section ofthe lever 32. bent, at 36, to offset or shoul- 'der it at its lower-edge portion and thereby extend it across the lower edge of the adjacent carriage-side and thus to cause the latch to project at the inner face of that side into the path of a stud 30. The stud31 serves the same purpose at the forward end of a carriage-side that the stop 18 serves at the inner end thereof.
" The manner of working the typewriterplatform 25, to lower it from its raised 'and advanced position and introduce it into the pedestal, and to withdraw, raise and advance it from its housed position, is substantially the same as' clearly described in said patent. When Athe platform is in its lowerinost and housed position, shown in Figs. 1 and 2, the" studs 30 are engaged by ythe latches 35 to lock the bell-cranks against turning, the obstruction which the rails 8 present to the pawls 34 preventing the levers 32 from turning by gravity to withdraw the latches from the studs. When the platform is pulled outwardly in the horizontal direction, the forward wheels 19 abut against the posts 9 at the offsets 11, which they enter, admitting lthe noses 15 into the recesses at 10. The
working of the parts is so timed .that in this extreme advanced position ofthe' carriage, whence the raising of the platform begins, the: 'pawls 34, register with and are raisedy by the dropping of the rear lever-ends whereby the latches 35 are lifted off the studs 30,' enter `the notches 12 and thus lock the carriage to the rails to prevent the strain in raising the platform from rolling the carriage back` wardly on ,the track, which would tend 'to disorganize the operation.. With the platform raised to the projecting position shown in Fig. 3 the ears 29 enter'keepers 37 provided in proper position to receive themvon the inner Afaces of the forward pedestalposts, `and thus supplement the support of the platform by the bell-cranks.
To house the platform from its position represented in Fig. 3, it is pulled outwardly far enough to release the ears 29, and then lowered 1n Aits continual horizontal condition,v to the point from which the carria e the platform the studs 30, (see Fig. 4) when swung about .the pivot point of forward bellcranks 20, will obviously first strike the backs of the notches of the forward fendsifof the latches 35 knocking these latchesdown to pull lugs 34 out of engagement with the notches in the rails, thus freeing the-carriages for backward movement. l i
I claim f y y 1. In combination, a desk, a cabinet, or the like, housing a carriage track and a carria e movablethereon and carrying bell-cran link-connected in pairs, with a platform pivotally supported on the longer .bell crank arms, a catch on the track, a stud on one of said arms, and a lever fulcrumed between its ends on a. side of said carriage totend to latches' 35 `with the studs 30; In lowering d rop by gravity at its inner end and pro' vided with a pawl to engage said catch and lock the carriage in its advance position, and
a latch to engage said stud for locking the bell-cranks against turning in the movements of the carriage. 2. In combination, a desk, a cabinet, or th like, housing a carriagetrack and carriage movable thereon and carryingl bell-crank' levers link connected in pairs, with a platform pivotally supported on thelonger bellcrank arms, atcheson the-trackrails near their forward ends, studs on said. arms,
levers fulcrumed to the carriage side to tend to dropy by gravity at their inner ends andprovided with forward pa-wls to engage said catches and lock the-carriage in its advance position and latches forward of the pawls to engage said studs for locking the bellcranks against turning in the movement' of the carriage.
v 3. In lcombination, a desk, a cabinet, or
the like,I housing a carriage track, and a car-vr riage movable thereon and carrying .bells cranks, connected in' pairs, with a plat-V form pivotally supported on the lo-nger bell crank-arm, notches in the lower edges of said sides, and latches forward of the shoulders to engage saidy studs for locking the i bell-cranks against turning in the move- `ments of the carriage.
4. In combination, a desk, a `platform mounted therein and adapted to be moved outwardly then upwardly, means automatically operated for holding said. platform against inward movement while itis being Aplatform starts its upward a keepersecured to said desk, a lug raised, von said platfo'rm and adapted to engage said keeper for holding said platform against lateral movement after it has reachedl its raised position. y 5. In combination, a' desk, Aa Aplatform mounted therein and adapted to be moved outwardly then upwardly, a lug on said platform near the inner end thereof. and adapted *to-engage a keeper secured to said desk to prevent lateral movement Vof said platform after it has reachedits raised position.
6. In combination, a desk, a Aplatform support, a platform mounted thereon and adapted to be moved outwardly and then upwardly, a parallel link motion for raising said platform wh'en at its outer limitof motion, a rocking gravity latch pivoted upon said platform support and adapted to drop into position as the platform rises upward to restrain the latter from inward movement, said latch being-.so constructedand located as to be' lifted by one of Isaid links as the platform reaches its lowermost position, no
being other mechanism than the said link necessary for the operation of said latch.
7.. In apparatus of the class described, a platform support, a platform, a plurality of substantially paralle levers for raising said platform' and so arranged that the platform is at all times maintained thereby in a hori'- zontal position, means part of said levers'at points on the opposite sides of the pivots from the platform to facilitate the raising operation, a gravity latch having a lu adapted to drop into engagement with a s oplder. upon one of .the elements abovel enumerated, as the to be released by one of the forward levers as the latform reaches its lowermostl position w ereby the platform is .restrained *against inward movement While being raised and lowered, said latch being operated solely by gravity and bydirect engagement one of the links.
. 8. In combination, -a desk, a lsupport, a platform mounted thereon and adapted to be moved outwardly then upwardly, two pairs of arallel levers adapted to support said plat sition, a' gravity latch havingl a lug thereon for engaging with one of e parts'` above enumerated, said' latch being adapted to drop into engagementwith said part as the cent the inner end of acting Aon the rear4 l the platform upper limit of itsV movement whereby the together with movement, and "f engaging orm at all times in a horizontal po-4 platform starts upward to' restrain-the latter from inward movement, and being adapted to be unlatched by one of said levers as the platform 'agai'nessumes itsA lowermost position. y
- 9. In apparatus `of thef'class described, 'a desk, aplatform mounted therein and ada ted to be moved outwardly then -upwarc gravity latch adapted to move into posi-y tion to' prevent inward movement of the platform while thejlatterisbeing raisedl or lowered, a keeper on the desk, a lug adje? `A the platform 'and adapted to engage said keeper to positively lock the platform against lateral movement in position for use when the platform is moved slightly inwardly at the upper limit of' its'- movement, said latch being so con-.f
structed and arranged as to permit such v1n::
ward movement .of v'the platform ,at its' uppermost position.
10. In apparatusof the' class described, a
desk, aplatform mounted therein and adapted to be l-moved outwardly then upwardly, a; arallel lever motion connected to said plat-M or1 n to maintain it at all times in horizontal position, a keeper on the desk, means'acting on said-lever motion to assist in raising the platform, a lug on the'inner end of the platform adapted to be moved into engagement with the keeper by backward movement of when the latter has reached the platform, in position for use must-first be drawn forward before it 4can be lowered.
V11. -In apparatus of the class described, a track, acarriage, levers pivoted in said carjriage and incliidingfaV bell crank lever', a platform supported by said levers and maintained at all times in horizontal positionthereby, a gravity latch mounted in said 'carriage and adapted to lock said carriage to said track as the platform starts upward Aand to be released by one arm of the bell crank lever as the platform reaches its lowermost position, in combination 'with means the same bell crank lever arm to lock the platform in lowermost position.
In witness whereof, I hereunto subscribe my name to this specificati on in the presence of two witnesses.
JENS VAALER. Witnesses:
JULIUS CLEMETSEN, ABRAHAM B. GREENBERG.