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Патент USA US2411790

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Nov. 26, 1946.
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F. H. HADLEY
woRxPIECE HOLDER
> AFiled July s, 1944
2 sheets-sheet 2
„afines-mIa„inusfl;
Patented Nev. 26, )1946
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Y.
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2,411,790
_UNITED STATES PATENT oFFlcE
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l
WoItKPIEoE HOLDER i
Frank HenryHadley, Birmingham, England, as
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signor of one-half to Baron Cyril David Woolf,
Birmingham, England.
, Application July 8, 1944, Serial No. 544,083
In Great Britain October 22, 1943
5 Claims. (Cl. 81--38)
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2
This invention has for its object to provide an
improved holder or jig whereby a plurality of
work-pieces can be securely held simultaneously
in a manufacturing operation.
l
In the accompanying _sheets of ` explanatory
drawings:
l
t
placed in position, the operating member m is
caused to advance the slidable jaws 9' into con
tact .with the work-pieces g. At first all the
slidable jaws 7' may move simultaneously, but as
5
'
soon as any one of them exerts a gripping action
on its work-piece g it is arrested, but the others
Figure 1 is a side elevation, Figure 2 a .part '
are free to continue their movement (usually to
sectional plan, and Figure 3 a sectional end
a small extent) until all the work-pieces are>
elevation, >of a work-piece holder constructed in
securely gripped. This continued movement is
accordance With the inVentî0r1,"Flgl1re 3 being lo permitted by the above mentioned resilient means
taken on the line 3-3 oi Figure 1.
through which motion is imparted from the. oper
Figures 4 and 5 are _respectively a >sectional side
ating member m to the slidable jaws y'.
elevation'and a part sectional plan illustrating
a modiñed form of the invention.
„
,
To enable the required movement to be trans
mitted lfrom the operating member mv to the
vIn carrying the invention intoY effect as shown 1.3 `_idable jaws 7‘ I secure to each of these jaws al
irl Figures 1 t0 3, I employ a cast iron or other
stem q whichis slidably supported in a bore 1"
base a Which iS formed at its upper side with a
in the block z', and» which at the end remote
pair of parallel `guides b havingïundercut >inner ‘ fromy the associated jaw has formed on or secured
sides. At one end of the guides vl) 'there iS
to ita hollow cylindrical thrust piece s, the latter.
mounted Orl the base lll»` a metal blOCk C Which g() having a, tapered outer end which is split s0 that
is slidably adjustable between the guides and iS
it is contractible. Also I form inone side oi the
Securable byy SCI’eWS d 0r `Otller means at any
operating member m a plurality, of conical re
desired position on the base.V v On the blOCk C >iS
cesses t adapted respectively to receive the
secured a stationary jaw e; _one side 0f which
tapered and split ends` ot the thrust-pieces s.
iS formed With a plurality 0f V 01’ other IlOtCheS 25 Moreover, around each stem ql at the inner end
f fOr loeatîrle the Work-DíeCeS Q- l‘llterrlativell7
of its thrust piece s' I arrange in the correspond
the stationary jaw" may be formed by a number
ing bore r in the block i a, helical spring l which
0f Separate pieces each formed With a rlOtCh
serves to retract the associated jaw i when the
and allsecured together on the block in fixed
Gperating member m is re1eased by the cam n
relation. Also ron the base a and between the 30 or other means, the Spring being supported at
guides b is adiustably Secured by Screws h 0r
the end remote from the thrust piece by ' a
other means f another metal block i carrying at
shoulder u in the said bore, and being adapted to
the end adJ'aCerlt t0 the Stationary llaW e a Pluralact onr the inner end of the thrust piece. On
ity of jaws i, the latter being slidable relatively
advancing the operai-,ing member m, it Simultane
to each other and to their supporting block. Each 3 Ch ously advances all the jaws i, but as vsoon as
0f the Slîdabïe jaWS i' iS formed With a V 0r
each of the latter is arrested by the coresponding
other nOtCh le, and theseV notches OCCUPY POSÍtions respectively Opposite t0 the IlOtCheS Í in
work-piece g continued action of the operating
member` causes the split-tapered end of the
thev stationary jaW e.- '
thrust piece to be contracted, and this enables
Near the end ofthe block i remote from the Lio'the operating member to cause each jaw to exert
Slîdable jaWS il', there iS slidably VIrlOllIlted between Y an eiiective grip on its work-piece. It will be
the guides b on the base a, a cross bar m serving
seen, therefore, that the thrust pieces s serve,l
as an operating member.` lThis operating member m îS mCVable by any conVerlîerlt means, Such
by virtue of their contractible ends, as the above
mentioned resilient means through which motion
as a cam n pîvotally supported 0n a horizontal ‘l5 is imparted from the operating member m to the
axis by fa bearing o_ adjustably secured to the
base a, the cam being adapted to act on the side
of the operating member remote from the block i,
’
slidable jaws 9'.
A5 shown, the screws d, it employed for se- I
curing the blocks c, i to ¢the base a, pass through
and beine provided with an actuating arm p.
one of the guides b and act on the adjacent sides
Alternatively the Operating member m may be 50 of the blocks through the medium of a pressure
movableby a'screw, Wedge or the like. Motion
piece o.
is imparted from the operating member m to the Y j Instead of being formed by the thrust pieces s,
individual slidable jaws 0' through any cone“ ' the resilient means above mentioned may have
venient resilient means such as that hereinafter
the form exempliñe'd in Figures 4 and 5 in which
described. After the Work-pieces g have been V55 the parts similar or analogous to those above de
2,411,790
3
4
scribed are indicated by the same reference char
acters suñixed by 1. In this example the thrust
pieces s1 (which may be of solid form) and the
with the stationary jaw for securing the work
pieces, a stationary support provided on the base
and slidably supporting the slidable jaws; an op
erating member for advancing all the slidable
jaws towards the stationary jaw, springs arranged
stems q1 are separate from each other and are
slidably supported in coaxial relationship by op
posite ends of the corresponding bores r1 in the
to bear against the said support and act on the
block i1, the stems being loaded by the springs t1
slidable jaws for retracting the slidable jaws, and
which serve to retract the slidable jaws ril. Also
the adjacent endsÄof the thrust pieces s1 and
stems q1 are hel-d in spaced relationship by hel
ical springs w1 which are situated between the
said ends in the bores r1, and which form the
aforesaid resilient means, the arrangement be
ing such that when movement of any of the jaws
7’1 under the action of the operating member m1
resilient means through which _simultaneous and
independent movements can be transmitted from
the said member to the slidable jaws.
‘2. A work-piece holder as claimed in claim 1
and having arranged’ between the slidable jaws
and the operating member, stems secured to the
slidable jaws, and thrust pieces on the ends of
, the stems
remote from the slidable jaws, the
thrust pieces having contractible outer ends and
is arrested by the corresponding work-piece g1,
the associated spring w1 is compressed by the
continued action of the operating member, and
this enables the operating member to cause each
jaw il to exert an eiîective grip on its work-piece.
.Moreoveig the block c1 carrying the fixed jaw
e1 is ‘secured to the base a1 by screws d1 passing
through holes in the base, and the block i1 carry
ing the movable jaws :il is adjustably secured to
the base by screws h1 passing through slots x1 in
the base, the guides provided for these blocks in
the previously described example being dispensed
with. Further, the operating member m1 is se
serving as the resilient means through which
,
movements can be transmitted from the operat
ing member to the slidable jaws, and the operat
ing member having recesses whereby the outer
ends of the thrust pieces can be contracted when
movements of the corresponding slidable jaws by
the operating member are obstructed.
3. A work-piece holder as claimed in claim 1
and having arranged between _the slidable jaws
and the operating member, stems secured to the
slidable jaws, thrust pieces arranged coaxially
withA and spaced from the outer ends of the stems,
and springs arranged between the adjacent ends
slidably supported by the block c1 carrying the 30 of the stems and thrust pieces and serving as
the resilient means through which movements
fixed jaw el, the other ends of the rods being
can be transmitted ‘from the operating member
interconnected by a cross bar al cairying the cam
to the slidable jaws‘, the operating member being
nl, The latter is rotatable about a vertical axis
adapted to act on the slidable jaws through jthe
by'an' actuating arm p1, and is adapted by co-op
medium oi the thrust pieces, springs, and stems.
eration with the adjacent side of the block c1
Y 4. A work-piece holder as claimed in claim 1
to impart movement through the operating mem
cured to and carried by adjacent ends of a pair of
parallel rods y1 which pass through holes in and are
ber m1, thrust pieces s1, springs w1, and stems q1,
and having arranged between the slidable jaws
with the said bar, and the latter being adjustably
secured to the base al, by screws 51 passing
ing member to the slidable jaws; the operating
and the operating member, stems secured to the
to the slidable jaws 7‘1. At a position beneath the
slidable jaws, and thrust pieces on the ends of
jaws i1 thev base is formed with a transverse slot
21, and beneath this slot there is arranged a par 40 the stems remote from the slidable jaws, the
thrust pieces having contractible outer ends and
allel bar 31 carrying adjustable abutments 41 for
serving as the resilient means through which
the work-pieces y1, these abutments having the
movements can be transmitted from the operat
form of vertical pegs in screw thread engagement
through slots 61 in the base.
'
In' other respects the example shown in Fig
ures 4 and 5 is essentially similar to that shown
in Figures 1 to 3.
The invention is not, however, limited to the
examples above described as subordinate details
of construction may be varied. to suit diiïerent
requirements. Further, I may duplicate the grip
ping means in either of the examples above de
scribed by mounting two sets of separately slid
able jaws on the same base, and arranging for
these to be actuated simultaneously from a corn
mon source of motion.
the operating member are obstructed,'and the
stems having combined therewith the springs for
retracting the slidable jaws after the latter have
been moved by the operating member.
5. A work-piece holder as claimed in claim l
slidable jaws, thrust pieces arranged coaxially
with and spaced from the outer ends of the stems,
and springs arranged between the adjacent ends
ofv t e stems and thrust
Having thus described my invention what I
claim as new and desire to secure by Letters Pat
ent is:
1. A work-piece holder comprising the combi
nation of a base, a stationary jaw provided on
the base and to form an abutment for a plural
ity of work-pieces, a plurality of separate vand 65
relatively slidable jaws >adapted to co-operate
latter have been moved by the operating member.
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' FRANK HENRY HADLE‘Y.V
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