other, to Crabs, Winches, Travellers, and other Machinery or Apparatus.
Year: 1885

page_text: тог
ани помошь обвито, аррисале спра от потега
Letters, Drawings, and other Articles, to Crabs, Winches,
Travellers, and other Machinery or Apparatus.
I THOMAS MESSENGER of N° 2 Clarence Lawn Dover in the County of Kent,
Engineer, do hereby declare the nature of my invention for A NOVEL COMBINATION
OF MECHANISM FOR PRODUCING RETAINING AND RELIEVING PRESSURE, APPLICABLE
TO CLIPS, OR HOLDERS FOR LETTERS, DRAWINGS AND OTHER ARTICLES TO CRABS,
WINCHES, TRAVELLERS, AND OTHER MACHINERY OR APPARATUS, to be as follows:-
My Invention relates to a combination of parts-viz-a worm, and a worm wheel,
or a portion of a worm wheel, in such a manner that the worm engages in the
teeth of the wheel like a pawl in some respects, but unlike, and possessing
advantages over a pawl in other respects.
Like a pawl, when the worm is engaged in the teeth of the wheel, the wheel is
free to turn in one direction but is instantly stopped from revolving in the other
direction.
Like a pawl it can only be thrown out of gear when the pressure on the wheel
against it ceases.
Unlike a-pawl, which only places a passive resistance against the teeth of the
wheel, the worm by being unscrewed can allow the wheel to revolve in the direction
of the pressure, or by being screwed up can rotate the wheel against the pressure, so
long as the pressure exists.
I obtain this result by the manner in which I hinge the bearing in which the
worm can be revolved with regard to the teeth of the wheel, that is to say,—the
teeth forming the worm, the joint of its hinged bearing, and the teeth of the worm
wheel in which the worm engages, are exactly in the same relative positions with
regard to each other, as is the tooth of the pawl, its joint, and the teeth of the wheel
in which the pawl engages.
On the accompanying sheet of Drawings I illustrate my Invention as applied to
a clip or holder for letters drawings or other articles.
Figure 1 shewing the clip in action and
Figure 2 the clip disengaged, the same letters indicating the same parts in each
Soura

page_text: The base plate A is formed with a fulcrum B for the clipping arm C; to one end
of this arm is jointed the clipping plate D, the other end being formed into a
portion of a worm wheel E; on the base plate is als opivoted at F the arm G which
forms a bearing in which the worm H can be rotated by means of the thumb screw
handle I.
The modus operandi is as follows
To clip a letter or other paper or document, the arm C is brought over until the
plate D rests upon the article to be clipped, the worm H is then placed in gear with
the portion of a worm wheel E and by means of the thumb screw handle I the
arm C is caused to clip the documents, holding them firmly.
To release these documents the worm H is unscrewed by means of the handle T
and the arms G and C thrown back to the position shown Figure 2.
This clip may be used either on the table, to hang up on a wall in combination
with covers to protect papers &c from dust, or in any other convenient manner.
Any number of loose papers &c may thus be securely clipped and at the same
time any one or more of them readily removed without defacement.
I may apply my novel mechanical combination to crabs, winches, travellers, or
any other machine in which its functions are required, modifying the same to suit
such application,-for example in the case of a crab I use a complete wheel instead
of the portion of wheel E shown with drawing.
100K

page_text: T
To release these documents, the worm H is unscrewed by means of the handle I
and the arms G and C thrown back to the position shown Fig. 2.
This clip may be used either on the table, to hang upon a wall in combination
with covers to protect papers etc from dust, or in any other convenient manner.
Any number of loose papers etc may thus be securely clipped, and at the same
time any one or more of them readily removed without defacement.
The worm H may be turned otherwise than by the handle I; for example the
tips of the threads of the worm might be milled for this purpose; also, by the
substitution of a movable key in lieu of the fixed handle the articles clipped may
be locked against unauthorised removal.
I may apply my novel mechanical combination to crabs, winches, travellers or
any other machine in which its functions are required, modifying the same to suit
such application; for example in the case of a crab I use a complete wheel instead
of the portion of wheel E shown on the drawing; the clipping plate D being of
course dispensed with.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is :-
1. The use of my novel combination of mechanism for producing, retaining and
relieving pressure, substantially as specified.
2. The arrangement and application of the worm H, in combination with the
portion of worm wheel E, or a worm wheel, to operate the arm C, or its equivalent,
substantially as described.
3. The use of a clip for holding letters, drawings, or other articles, constructed,
combined and arranged to operate substantially as hereinbefore described and
illustrated on the accompanying sheet of drawing.
Dated this Sixteenth dew of June 1986