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Publication numberUS2400982 A
Publication typeGrant
Publication dateMay 28, 1946
Filing dateJan 13, 1945
Priority dateJan 13, 1945
Publication numberUS 2400982 A, US 2400982A, US-A-2400982, US2400982 A, US2400982A
InventorsHarry Dobrin
Original AssigneeHarry Dobrin
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Magician's device
US 2400982 A
Images(1)
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Description  (OCR text may contain errors)

May 28, 1946.

H. DBRIN l 2,400,982

MAGIGIAN S DEVICE Filed Jan. 15, 1945 .l n.; d 30 32 i Z/ ZA /aI 15 /la IZ .f3-m E' 1 50 .l5 .[6 l /g if@ 4" Y "Z4 '45 i6 [0A f i/ iH 50 INVENTOR.

I vIll" ATTORNEY Patented May 28, 1946 UNITED STAT f MAGicrANs DEvIolf l w Harry Dwobrn, New York, N. Y. Application `Jarman' 13, 194.5, serial No.` 572,646'

k8 Claims.

.The present invention relates to magicians devices and more particularly to devices such as, for example, a slate of special construction adapted for use by magicians or mentalists in executing tricks or feats of mind reading.

The primary object of the present invention is to provide improved locking or holding means for the foldable concealing part of a panel of a magicians or mind readers slate or similar article. In` one form of the invention, the panel of the device has a Writing-surface part nor-` mally concealed by the movable part of the panel, while Vin another form of the invention the panel is provided With a mirror which is normally con-y cealed by the foldable part of the panel.

Theabove and other objects, features Yand ad vantages of the present invention will be fully understood from the following description considered in connection with the accompanying illustrative drawing.

In the drawing:

Fig. 1 is a plan View of a magicians slate embodying the present invention, portions of the frame being cut away for the purpose of illustration;

Fig. 2 is a sectional viewon the line 2-2 of Fig. 1 and shows in dotted lines an intermediate position of the foldable or concealing part yof the panel; y

Fig. 3 isA a sectional view on the line 3-3 of Fig.1;,v

Fig.1 4 is a sectional View on the line 4- 4 of Figli;

Fig. 5 is la fragmentary plan view `of a magi,-k cans slate provided with a concealable part.

Referring now to ,the drawing in detai1th,e device I0 embodying the present invention consists as here shown of a framed slate ofa size whichcan be conveniently manipulated Vby the, magician or mind reader andjconveniently Aheld in one of his hands while he writes with his other' hand on either side of the slate in the view ofthe audience. The frame ofv the slatecomprisesthe opposite side members I2 andthe opposite end `members I4 and I6, respectively. Said frame is4 provided with an internal peripherally continue ous groove I8 within Awhich the panel indicatedv as a whole by the numeral 20 is slidably mounted,

the marginalside and edge portions ofthe panel being overlapped at both surfaces thereof byv the frame members. It will be understoodthat panel 2l] is yslidable longitudinally of vside members I2 of. the frame indirectionstoward Vand the same area as thepanel, said backing member being formed of suitably stiff cardboard as in the, usual slate of the type to which this inventionrelates. One side surface of backing member 22 of the panel is completely covered by a sheet or layer `24 of slate-simulated material, whereby said side of the panel is provided with a blackv Writing surface. Said sheet 24 consists of thin cardboard coated on its outer surface with silicate paint, .said `coating providing the Writing surface, the inner surface` of= sheet 24 being adhesively secured to the adjacent surface of backing member 22. The other sideof w, the panel forthe full width of said-sheets. Part 26 ofthe one `of the sheets is adhesively secured tothe adjacentl surface of `backing member' 22 except at the portion thereof which overles a transversely extendingrecess 38 `which is pro vided in backing `member 22 `by removing a pore tion of the material thereof. Recess 38 extends for the full width of the backing member as indicated by the laterally spaced dotted lines 38A in Eig. l. Sheet parts 28', 3! and 32 are free from f direct securement to4 backing member 22, and

. atv

sheet parts 28 and 32 4are adhesively united to veachother insurface to `surface relation and form the foldable member` or panel part 46. Reinforcing strips 42 and 44 of thin sheet metal aresecured adhesively, preferably byrubber cerecess 38 vand are positioned.- in said recess, said reinforcing strips extending for the full width of the sheet partsA 26 and 30 transversely of the panel. Recess38 eliminates the formation `of a bulge in the panel at the fold lines 34, 36, and

strips 4,2 and 44, besides reinforcing sheet parts away fromI end members I4 and I6 of the frame.-`

than the panel proper lwhereby said foldable Panel 20 comprises a backing member 22 of 26 and 28, aid in defining the fold line of movable panel part 40 and also provide a firm backingfor the portions of the Writing surface of the panel-which are positioned over recess 38.

Foldable member 40 of the panel is narrower member is movable from a down folded position at one side of the fold or hinge line of said member to a down folded position at the other side of said fold line. More particularly, the width of folding member 40 is approximately equal to the distance between the confronting inner edges IZA of side panel members I2. When foldable member 4B is in one of its down folded positions, for example, that illustrated in Fig. 1, in which it overlies sheet part 30, the corresponding part of the panel is Vconcealed by saidfoldable vmember and ysheet parts 26 and 28 appear as a con-` tinuous surface of the slate, fold line 34 being substantially invisible except upon close inspection. On theother hand, when foldable member 40 is positioned in its other down folded posifoldable panel part is correspondingly large, said part can be stiifened by strips of thin sheet metal disposed between the parts 28 and 32 at the side and top marginal edge portions thereof and secured in position by rubber cement lor any other suitable adhesive.

In either of the down folded positions of foldable member 40, it is held or locked releasably inY down folded position by the overlapping edge portion of frame member I4 or frame member I6. Thus, as illustrated in Fig. l foldable member 40 is received in the groove of end frame member I6 and is thus releasably locked or held in down folded position yinabutting'surface relation to sheet part 3ll.V On the other hand, when foldable member 40 is down folded against sheet part 26, the marginal endportion of said foldable member is positioned inthe groove ofthe other end frame member I4 r and is thus releasably locked or held in said down folded position. When it is desired to release foldable member 46 from one of its down folded positions in which it is retained by the companion or adjacent frame member, panel as a whole is shifted or slid in the grooves of side frame members I2 toward the 'opposite end frame member sufficiently to release the foldable member to permit the pivotal movement thereof to its other down foldedposition, after Which panel 20 is slid in the opposite other down folded position thereof, part 3D moves longitudinally of the frame in the grooves of frame members I2, this movement being pcssible because said part is not secured to the underlying surface of panel member 22. In the case of large slates, it is advisable to reinforce part 30 by a sheet of thin metal secured by rubber cement or in any other suitable way to the under surface of part 3B.

Notches 46 are provided in sheet parts 26 and 30 at the opposite ends of the fold line of panel member to improve the foldability of panel part 40. Further as here shown, strips 48 of thin `cardboard are provided at one side of the panel,

said strips terminating short of the adjacent end framemembers I4 and I6 'so that a small amount ofrclearance. is provided in the corresponding direction to permit the free end of foldable member 46 to slide into the groove in the adjacent end frame member, and finally the 'panel 20 is moved towards said last mentioned frame member so as to engage the free end of the foldable member in the groove of the frame member. will be noted that the device of the present invention has a Vdouble locking or retaining construction for the foldable member or panel part 40 of the slate, while at the same time, the panel 20 can be easily manipulated to facilitate the movement of panel 40 by the magician or mentalist to either of its down folded and locked positions, and it will be understood that this shifting of the foldable panel member 40 can be readilyaccomplished by the magician or-other person having the usual dexterity and skill without detection by the 'audience during the performance. When panel part 4U is pivotally moved from one down folded position to the Thus, it

hesively united sheet portions of the'grooves of side members I2 to enable the manipulator of the slate to press the end portion of the panel transversely of the plane thereof in said portions of the grooves to facilitate the entrance of the free end portion of the foldable member 48 in the groove of the adjacent end frame member `during the operation of locking said foldable mem-ber in the groove of said end frame member. 'Reinforcing strips 49 are secured to the marginal side portions of sheet part 26 to compensate for the additiona1 thickness of one sheet part of the foldable member 46.

It will be understood by users of devices of the type to which this invention relates that the slate I0 can be used in performing various tricks of the kind performed by magicians or mentalists in presenting mind reading` performances or in performing other feat's or tricks. In general, it

' I Will be understood that preliminary to the giving of the performances, various numbers or other Writings are applied by chalk to the outer surfaces of'either the portions 38 and 32 or the portions V26 and 28, the outer surfaces of portions 26 and 28 being blank when eitheriportion 30 or 32 or both of said last mentioned portions have writing thereon and portions 30 and 32 being blank when either portions 26 or 28 or both of said last mentioned portionsl have Iwriting thereon so that when foldable member 4U is in one of its down folded positions, the writing is concealed by said foldable member, later to be uncovered at some point of the peformance of the trickor feat, by moving the foldable meinf ber to its other down folded position.

In the form of the inventionillustrated Fig. 5, the device IOA is of the same constructionjas the device I0 except'thata plane mirrorV 50 is adhesively secured to a part of panel member 22A in position to be concealed by the foldable member 40A which is of the samegconstruction as the foldable member 40 of the device I0. In otherv words, indevice 10A sheet portion 30. is omitted and foldable member 40A consists ofY ad- Y portionsr28A and 32A which correspond to'sheet portions 28 and 32, respectively, of device I8, sheet portion 28A being integralwith sheet portion 26A which corresponds to shetrportion 26 of device Ii). The fold line of foldable member 40A is indicated at 34A and corresponds to the fold line 34 of device I0. The frame of device IDA is the same as the frame of the device I0 andv except for the differences hereinbefrore described, panel 20A of device I 0A is the -same as panel 20 ofdevice I0, panel 20A being slidable'in the frame in the manipulation of the device for releasably locking foldable member 40A in either of its down folded positions in the -same way described above' with' reference'` to themaline extendingtransversely of said backing memd ber close to saidsurface portion thereof and havnipulation of the device for releasably locking foldable member 40' of device I0 in either of the down folded positionsof foldable member 46. In Fig. 'the foldable memberllA is in the position in which the mirror is exposed for use by the magician or mentalist in performing the trick or feat of mind reading, but normally when the device is in a: position in Which it can be seen'by the audience-foldable member 40A is in its other. down folded position in which it completely conceals the mirror.- Thus, as Will be readily understood, device IBA constitutes a Writing slate provided `with a concealed mirror. It Will be'understood that theouter surface of mirror 59 is substantially ush or raised but slightly above the adjacent surface of panel member 22A.

It will be understood that various changes 'in the details of construction and in the arrangement ofparts" may be made in the devices of the present invention Without departing `from the underlying videa thereof Within the scope of the appendedolaims.

Having thus described myV invention, what I claim and desire to secure by Letters Patent is:

i l. A device of the character described, comprising a frame, a Writing panel slidably mounted in said frame,` and a iiat member foldably connected to said panel along a line close to one surface of said panel and extending transversely of i said surface medially thereof, said foldable member being movable from onedovvn folded position in which Vit' overlies and conceals a portion of said surface at one side of said medial line to a dovvn` folded position in which it overlies a portion of said surface at the other side of said medial line, and exposes said first mentioned surface portion, both surfaces of said foldable member having the panel surface portions, said foldable member being releasably engageable Withsaid frame by sliding said panel in said frame for releasably retaining said foldable member in either of said down folded positions thereof. 2. An article of the character described comprising a frame having internally grooved side and end members, a writing panel mounted in said frame and having its-marginal edge portions slidable in said grooves, and a fiat member foldably connected to said panel along a line close to one surface of said panel and extending transversely thereof between said side members of the frame, said foldable member being movable from one down folded position in which it over- `same surface appearance as at least one of said lies and conceals a portion of said surfaceat one side of said line to a down folded position in which it overlies a portion of said surface at the other side of said line, and exposes said first mentioned surface portion, both surfaces of said foldable member having the same surface appearance as at least one of said panel surface portions, the outer end portion of said foldable member being receivable in the groove of either of said end members by sliding the panel in the grooved side members of the frame whereby said foldable member is releasably'held in either of said downV folded positions by said end frame members, respectively.

3. An article of the character described comprising a Writing panel having a backing member, a layer of sheet material `having a part secured to and covering a surface portion of said backing member, said layer of sheet material having an integral foldable part free from seourement to said backing member, said foldable part being' foldably connected to said secured part along a ing one surface continuous with the outer surface Vof said secured part, and a layer of sheet material having a part secured to the other surfaceof said foldable: part; said. last mentioned layer having an integralpart positioned in overlying covering relation to vsaid backing member iin movable relation thereto, the first mentioned part of said last mentioned layer being foldable as a unit with Said other foldable'part at said transverse line 'and constituting a foldable member movable at said transverse `:fold line from one downfolded 'positief/rat one side of said line in which it overliesand conceals the outer surface portion ofthe secured part of the rst mentioned layer toa down` folded 4position at 4the other side of said transverse-line for concealing said backing-covering part of said last mentioned layer,ithe 'exposed' surfaces of said layers having the same surface appearance, and means for releasably holding said foldable member in either of said down folded positions thereof.

4. An article of the character described comprising a writing panel having a backing member, a layer of sheet 'material having a part secured to and covering a surface portion of said backing member, said layer of sheet material having Van integral foldable part free from securement' to saidv backingmember, -said foldable part being foldablyconnected to said secured part along a line extending transversely of said backing member closev to saidsurface portion thereof and having yone surfacecontinuous With the outer surface of said secured part, and a layer of sheet material having a part secured to the other surface of said foldable part, said last mentioned layer having an integral part positioned in overlying covering relation to said backing member in movable relation thereto, the rst mentioned part of said last mentioned layer being foldable as a unit with said other foldable part at said transverse line and constituting afoldable member movable at said transverse fold line from one down folded position at one side of said line in which it overlies and conceals the outer surface portion of the secured part of the first mentioned layer to a down folded position at the other side ofsaid transverse line for concealing said backing-covering part of said last mentioned layer, the exposed surfaces of said layers having the same surface appearance, and a frame` having side members either of said down folded positions thereof.

5. An article of the character described comprising a writing panel having a backing member, a layer of sheet material having a part secured to and covering a surface portion of said backing member, said layer of sheet material having an integral foldable part free from securement to said backing member, said foldable part being foldably connected to said secured part along a line extending transversely of saidbacking member close to said surface portion thereof and having one surface continuous with the outersurface of said secured part, and a layer of sheet material having a part secured to the other surface of said foldable part, said last mentioned layer having an integral part positioned in overlying covering relation to said backing member in movable relation thereto, the first mentioned part of said last mentioned layer being foldable as a unit with said other foldable part at said transverse line and .constituting a foldable member movable at said transverse fold line from one down'folded position at one side of said line in which it overlies and conceals the outer surface portion of the secured part of the first mentioned layer to a down folded position at the other side of said transverse line for concealing said backing-covering part of said last mentioned layer, the exposed surfaces of said layers having the same surface appearance, means stiffening and reinforcing said layers of sheet material adjacent said fold line, and means for releasably holding said foldable member in either of said down folded positions thereof.

6. A device of the character described comprising a panel having a backing member, a mirror carried by said backing member at one side thereof and covering a surface part thereof, a layer of sheet material at said side ofthe backing mem*- ber and secured to an adjacent surface part of said backing member, and a foldable member foldably connected to said layer of sheet material along a line close to the surface of the backing member at said side thereof, said foldable member being movable at said fold line from a down folded position in which it covers and conceals said mirror and appears as a continuation of said layer to a down folded position in which it overlies said layer and exposes said mirror, and means for releasably holding said foldable member in either of said down folded positions thereof.

'7. A device of the character described comprising a panel having a backing member, amirror carried by said backing member at one side thereof and covering a surface part thereof, a layer of sheet material at said side of the backing member and secured to an adjacent surface part of said backing member, and a foldable member foldably connected to said layer of sheet material along a line close to the surface of the backing member at said side thereof, said foldable member being movable at said fold Yline from a down folded position in which itV covers and conceals said mirror and appears as a continuation of said layer to a down folded position in which it overlies said layer and exposes said mirror, and a frame having side members in which said panel is mounted andfend members releasably engageable with said foldable member in said down folded positions, respectively, thereof for releasably holding said foldable member in either of said down folded positions thereof.

8. A device of the character described, comprising a frame, a Writing panel slidably mounted in said frame, and a nat member foldably connected to said panel along a line close to one surface of said panel and extending transversely of said surface medially thereof, said foldable member being movable from one down folded position in which it overlies and conceals a portion of said surface at one side of saidmedialline to a down folded position in which it overlies a portion of said surface at the other side of said medial line, and exposes said'rst mentioned surface portion, said two panel surface portions and both side surfaces of said foldable panel member having the same surface appearance.

HARRY DOBRIN.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5445565 *Feb 18, 1994Aug 29, 1995Setteducati; MarkTable top magic theater set
Classifications
U.S. Classification472/57
International ClassificationA63J21/00
Cooperative ClassificationA63J21/00
European ClassificationA63J21/00