US164430A - Improvement in magic-pencil cases - Google Patents
Improvement in magic-pencil cases Download PDFInfo
- Publication number
- US164430A US164430A US164430DA US164430A US 164430 A US164430 A US 164430A US 164430D A US164430D A US 164430DA US 164430 A US164430 A US 164430A
- Authority
- US
- United States
- Prior art keywords
- magic
- screw
- pencil
- improvement
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 210000003746 Feathers Anatomy 0.000 description 12
- 206010022114 Injury Diseases 0.000 description 2
- 241000220010 Rhode Species 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K21/00—Propelling pencils
- B43K21/02—Writing-core feeding mechanisms
- B43K21/08—Writing-core feeding mechanisms with the writing-cores fed by screws
Definitions
- my invention consists in the employment of a spirallyformed feather or pin to operate in the screw-slot of the magic mechanism, in lieu of the cylindrical pin heretofore universally used, and which does not perform its work with the desirable smoothness, certainty, and durability, owing to the shortness of the bearing upon the sides ot' the screw, so that any slight roughness in the screw-slot will cause the magic mechanism to operate with unevenness, which will gradually grow worse, and finally render the pencil inoperative by reason of the resulting injury to the screw.
- Figure l is a side view of a magic pencil, with a portion of the outer case broken away, so as to show a portion of the interior mechanism.
- Fig. 2 is a sectional side view.
- Fig. 3 is a view of the outer case or tube.
- Fig. 4 is a View of a portion of the pencil mechanism.
- A is the outer tube or case; B, the tip by means of which the pencil mechanism is connected to thetube A, either by means of solder or by friction, as preferred.
- 0 is the extension-tube, inside of which is secured the screw-slotted tube D.
- the spirally-formed feather or pin F which operates within the screw-slot d of the tube D. I prefer to cut out the feather F from a longitudinally-dix ided tube of the proper diameter, and, after soldering the piece so obtained upon the tube E, I mill it 01f on both sides'so as to exactly fit the pitch of the screw-slot d.
- the feather or pin F constructed as above described, may be more cheaply made and attached than the ordinary cylindrical pin heretofore used, and the durability of the pencil is greatly increased.
Description
A. T. CROSS.
Mag i 0 Fe II c i l Ca se.
I llllllllll H FID- I.
WITNESSES.
Pa tented june 15, 1875 FIDIZ.
INVENTUR.
THEGRAPHIC C0.PHOT0-LITH.39&41 PARK P E N Y UNITED STATES PATENT Demon.
ALONZO T. GROSS, OF PROVIDENCE, RHODE ISLAND.
IMPROVEMENT IN MAGIC-PENCIL CASES.
Specification forming part of Letters Patent No. 164,430, dated June 15, 1875; application filed March 1, 1875.
To all whom it may concern I Be it known that I, ALONZO T. ORoss, of Providence, in the State of Rhode Island, have invented an Improvement in Magic- Pencil Cases, of which the following is a specification:
The nature of my invention consists in the employment of a spirallyformed feather or pin to operate in the screw-slot of the magic mechanism, in lieu of the cylindrical pin heretofore universally used, and which does not perform its work with the desirable smoothness, certainty, and durability, owing to the shortness of the bearing upon the sides ot' the screw, so that any slight roughness in the screw-slot will cause the magic mechanism to operate with unevenness, which will gradually grow worse, and finally render the pencil inoperative by reason of the resulting injury to the screw. I have entirely removed the difficulty referred to by the employment of a spirally-formed pin or feather made to fit the incline of the screw, whereby a long bearing and wearing surface is secured, by means of which the slight roughness or irregularities of the sides of the screw are successfully bridged over and rendered nugatory.
In the drawing, Figure l is a side view of a magic pencil, with a portion of the outer case broken away, so as to show a portion of the interior mechanism. Fig. 2 is a sectional side view. Fig. 3 is a view of the outer case or tube. Fig. 4 is a View of a portion of the pencil mechanism.
A is the outer tube or case; B, the tip by means of which the pencil mechanism is connected to thetube A, either by means of solder or by friction, as preferred. 0 is the extension-tube, inside of which is secured the screw-slotted tube D. Upon the screw-tube E is soldered the spirally-formed feather or pin F, which operates within the screw-slot d of the tube D. I prefer to cut out the feather F from a longitudinally-dix ided tube of the proper diameter, and, after soldering the piece so obtained upon the tube E, I mill it 01f on both sides'so as to exactly fit the pitch of the screw-slot d.
The feather or pin F, constructed as above described, may be more cheaply made and attached than the ordinary cylindrical pin heretofore used, and the durability of the pencil is greatly increased.
I claim as my invention-#- The spirally-formed feather F, attached to the screw-tube E in a magic-pencil case, in combination with the tube D, having the screwslot 61.
ALONZO T. GROSS.
Witnesses:
FRANK T. PEARCE, SooRATEs SoHoLFiELD.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US164430A true US164430A (en) | 1875-06-15 |
Family
ID=2233839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US164430D Expired - Lifetime US164430A (en) | Improvement in magic-pencil cases |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US164430A (en) |
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0
- US US164430D patent/US164430A/en not_active Expired - Lifetime
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