US3786978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic stapler
Assignee: Electro Matic Staplers Inc
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Filing: 1972-06-05
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Granted: 1974-01-22
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Expires: 1992-06-05
Abstract
Abstract This electro-magnetic stapler is hand held and has a circuit including a trigger switch, which when actuated, energizes an electro-magnetic load coil to operate the stapler. When the trigger is held in an actuated condition for sufficient time the operation of the stapler is repeated. A safety switch controlled by work engaging means on the stapler, prevents operation of the stapler unless said work engaging means contacts the work piece. The staple driving blade is at the front end of the stapler to facilitate locating the stapler relative to the place where the stapling is to be done. The trigger switch assembly permits a smooth operation. The assembly of the stapler permits a pair of split plastic covers to be removed without effecting the innards of the stapler. The plunger movement is shock absorbed at opposite ends of its movement. The circuit parts and components are housed in the stapler and mounted on a non-conductive plate disposed in the handle portion of the stapler.
Inventors
- 👤 G Manganaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:29
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/06; B25C5/00; B25C5/10; B25C5/15
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
226 words
A staple driving tool comprising a body, a load coil in said body, said coil having a central opening, an armature disposed in said body and axially slidable in said hole, for movement by said coil when the coil is energized, staple driving means fixed to said armature and disposed at the front of the body, a staple magazine at the lower end of said body, a trigger switch on said body, and circuit means including said coil and switch, to automatically energize said coil upon actuating said switch, and safety switch means in said circuit and located at the front of the body, to prevent energizing of the coil unless the lower front end of the tool is on a work piece in position for stapling, said body comprising a pair of symmetrical frame members, said load coil being disposed between said frame members, said staple magazine being disposed between said frame members, said trigger switch comprising a trigger housing disposed between said frame members, a trigger slidable in said trigger housing, a micro-switch on said trigger housing, means to actuate said micro-switch upon moving the trigger in said trigger housing in one direction, and means to fix said staple magazine, said trigger housing, said micro-switch said safety switch and said coil to said frame members and to fix said frame members to each other.
Claim 2
Dependent Claim
226 words
A staple driving tool comprising a body, a load coil in said body, said coil having a central opening, an armature disposed in said body and axially slidable in said hole, for movement by said coil when the coil is energized, staple driving means fixed to said armature and disposed at the front of the body, a staple magazine at the lower end of said body, a trigger switch on said body, and circuit means including said coil and switch, to automatically energize said coil upon actuating said switch, and safety switch means in said circuit and located at the front of the body, to prevent energizing of the coil unless the lower front end of the tool is on a work piece in position for stapling, said body comprising a pair of symmetrical frame members, said load coil being disposed between said frame members, said staple magazine being disposed between said frame members, said trigger switch comprising a trigger housing disposed between said frame members, a trigger slidable in said trigger housing, a micro-switch on said trigger housing, means to actuate said micro-switch upon moving the trigger in said trigger housing in one direction, and means to fix said staple magazine, said trigger housing, said micro-switch said safety switch and said coil to said frame members and to fix said frame members to each other.
Claim 3
Dependent Claim
28 words
The combination of claim 1, and a pair of insulating cover members on said body, said attach means including means to attach said cover members to said body.
Claim 4
Dependent Claim
108 words
A stapler comprising a body, said body comprising a pair of similar, symmetrically disposed, spaced, metal frame members having lower horizontally extending portions and vertical portions extending upwardly from the front ends of said horizontal portions, a handle-shaped insulating plate connecting an upper end of the vertical portion of one of said frame members with the rear end of the horizontal portion of said one frame member, a trigger between said frame members, a micro-switch above said trigger housing and between said frame members, a trigger slidably mounted in said trigger housing, spring means to lower said trigger; and means to actuate said micro-switch upon raising said trigger.
Claim 5
Dependent Claim
108 words
A stapler comprising a body, said body comprising a pair of similar, symmetrically disposed, spaced, metal frame members having lower horizontally extending portions and vertical portions extending upwardly from the front ends of said horizontal portions, a handle-shaped insulating plate connecting an upper end of the vertical portion of one of said frame members with the rear end of the horizontal portion of said one frame member, a trigger between said frame members, a micro-switch above said trigger housing and between said frame members, a trigger slidably mounted in said trigger housing, spring means to lower said trigger; and means to actuate said micro-switch upon raising said trigger.
Claim 6
Dependent Claim
60 words
The combination of claim 3, an electromagnetic coil between the vertical portions of said frame members, an armature for said electromagnetic coil, slidably mounted therein, spring means to raise said armature, a staple driving blade mounted on said armature for reciprocation therewith, and means to fix said trigger housing, said micro-switch and electro-magnetic coil to and between said frame members.
Claim 7
Dependent Claim
67 words
The combination of claim 4, a cup receiving said electro-magnetic coil, said cup comprising a bottom wall from which a cylindrical wall extends upwardly, said coil being housed in said cup, a cover on said cup having lugs extending outwardly from said cover and beyond said cylindrical wall, and said frame members having part cylindrical portions contacting said cylindrical wall and formed with slots receiving said lugs.
Claim 8
Dependent Claim
25 words
The combination of claim 5, a base disposed below the bottom wall of said cup and means to fix said base to said bottom wall.
Claim 9
Dependent Claim
44 words
The combination of claim 6, a disc disposed in spaced relation above said cup and between said frame members and having edges contacting the part-cylindrical walls thereof, and having outwardly extending lugs, said part cylindrical portions having slots receiving said lugs on said disc.
Claim 10
Dependent Claim
54 words
The combination of claim 7, an armature slidable in the coil and extending thereabove, a plate fixed to said armature for movement therewith and disposed below said disc and spaced above said cover, said plate having a forwardly extending projection, and a staple driving blade mounted on said projection for reciprocation with said armature.
Claim 11
Dependent Claim
28 words
The combination of claim 8, and a pair of bumpers fixed to said armature, one above and one below said plate, for contacting said disc and cOver respectively.
Claim 12
Dependent Claim
60 words
The combination of claim 9, a shallow dish on said disc, a coil compression spring on said shallow disc and surrounding the upper end of said armature, and stop means at the upper end of said armature contacted by the upper end of said compression spring, whereby said compression spring raises said armature from lowered position, upon disengaging said coil.
Claim 13
Dependent Claim
148 words
A stapler comprising a body, said body comprising a pair of symmetrically disposed spaced frame members having lower horizontally extending portions and vertically extending portions extending upwardly from the front ends of said horizontally extending portions, said upwardly extending portions having part cylindrical outwardly recessed portions, a cup disposed between said part cylindrical shaped portions, said cup comprising a bottom wall from which a cylindrical wall extends upwardly a load coil housed in said cup having a center hole for slidably receiving a cylindrical armature extending thereabove, a cover at the upper end of said cup and having a center hole, for slidably receiving the lower end of said armaturee, registering with armature, center hole in said coil, said cover having lugs, said cup having notches receiving said lugs, said part cylindrical portions having slots receiving said lugs, and means to attach said frame members to said cup.
Claim 14
Dependent Claim
148 words
A stapler comprising a body, said body comprising a pair of symmetrically disposed spaced frame members having lower horizontally extending portions and vertically extending portions extending upwardly from the front ends of said horizontally extending portions, said upwardly extending portions having part cylindrical outwardly recessed portions, a cup disposed between said part cylindrical shaped portions, said cup comprising a bottom wall from which a cylindrical wall extends upwardly a load coil housed in said cup having a center hole for slidably receiving a cylindrical armature extending thereabove, a cover at the upper end of said cup and having a center hole, for slidably receiving the lower end of said armaturee, registering with armature, center hole in said coil, said cover having lugs, said cup having notches receiving said lugs, said part cylindrical portions having slots receiving said lugs, and means to attach said frame members to said cup.
Claim 15
Dependent Claim
60 words
The combination of claim 11, a disc disposed in spaced relation above said cup and between said frame members and having edges contacting the part-cylindrical walls thereof, and having outwardly extending lugs, said part cylindrical portions having slots receiving said lugs on said disc, said disc having a central hole therein to slidably receive an upper portion of the armature.
Claim 16
Dependent Claim
25 words
The combination of claim 11, a base disposed below the bottom wall of said cup and means to fix said base to said bottom wall.
Claim 17
Dependent Claim
47 words
The combination of claim 12, a plate fixed to said armature for movement therewith and disposed below said disc and spaced above said cover, said plate having a fowardly extending projection, and a substantially flat staple driving blade mounted on said projection for reciprocation with said armature.
Claim 18
Dependent Claim
28 words
The combination of claim 14, and a pair of bumpers fixed to said armature, one above and one below said plate, for contacting said disc and cover respectively.
Claim 19
Dependent Claim
142 words
A staple driving tool comprising a body, an electro-magnetic load coil means in said body, means to fix said coil means to said body, said coil means having a central hole, an axial armature having its lower end slidably received in said hole and guided by said coil means for vertical reciprocation, upper guide means fixed to the body coaxially of said coil means and having means to slidably receive and guide said armature for vertical reciprocation, a member fixed to said armature and disposed between said coil means and said upper guide means and offset forwardly of said armature, a staple drive blade mounted on said member and disposed at the front of the body and parallel to said armature and means on said body to guide said drive blade for vertical movement with said armature in parallel spaced relation thereto.
Claim 20
Dependent Claim
142 words
A staple driving tool comprising a body, an electro-magnetic load coil means in said body, means to fix said coil means to said body, said coil means having a central hole, an axial armature having its lower end slidably received in said hole and guided by said coil means for vertical reciprocation, upper guide means fixed to the body coaxially of said coil means and having means to slidably receive and guide said armature for vertical reciprocation, a member fixed to said armature and disposed between said coil means and said upper guide means and offset forwardly of said armature, a staple drive blade mounted on said member and disposed at the front of the body and parallel to said armature and means on said body to guide said drive blade for vertical movement with said armature in parallel spaced relation thereto.
Claim 21
Dependent Claim
221 words
A staple driving tool comprising a body, a load coil in said body, an armature disposed in said body for movement by said coil when the coil is energized, staple driving means on said armature, a staple magazine at the lower end of said body, a trigger switch on said body, and circuit means including said coil and switch to automatically energize said coil upon actuating said switch, means to fix said coil to said body, said coil having means to slidably receive and guide the lower end of said armature, upper guide means fixed to the body, to slidably receive and guide the upper end of said armature, said staple driving means being disposed parallel to and spaced from said armature, and outside said coil and at the front of said body and being fixed to said armature between said coil and upper guide means, said body comprising a pAir of spaced, symmetrically disposed frame members, said coil being disposed between said frame members, said upper guide comprising a disc disposed in spaced relation above said coil and between said frame members and above said member fixed to said armature, and safety switch means in said circuit to prevent energizing of the coil unless the lower front end of the tool is on a work piece in position for stapling.
Claim 22
Dependent Claim
221 words
A staple driving tool comprising a body, a load coil in said body, an armature disposed in said body for movement by said coil when the coil is energized, staple driving means on said armature, a staple magazine at the lower end of said body, a trigger switch on said body, and circuit means including said coil and switch to automatically energize said coil upon actuating said switch, means to fix said coil to said body, said coil having means to slidably receive and guide the lower end of said armature, upper guide means fixed to the body, to slidably receive and guide the upper end of said armature, said staple driving means being disposed parallel to and spaced from said armature, and outside said coil and at the front of said body and being fixed to said armature between said coil and upper guide means, said body comprising a pAir of spaced, symmetrically disposed frame members, said coil being disposed between said frame members, said upper guide comprising a disc disposed in spaced relation above said coil and between said frame members and above said member fixed to said armature, and safety switch means in said circuit to prevent energizing of the coil unless the lower front end of the tool is on a work piece in position for stapling.
Claim 23
Dependent Claim
162 words
A staple driving tool comprising a body, a load coil in said body, an axial armature disposed in said body for movement by said coil when the coil is energized, said armature comprising a lower portion slidably received in said coil, and a top portion extending above said coil, an upper guide means on the body having a hole to slidably receive said top armature portion and means on the body having a hole constituting lower guide means for said lower armature portion, staple driving means fixed to said armature between the upper guide means and lower guide means, a staple magazine at the lower end of said body, a trigger switch on said body, and circuit means including said coil and switch to automatically energize said coil upon actuating said switch, and safety switch means in said circuit to prevent energizing of the coil unless the lower front end of the tool is on a work piece in position for stapling.
Claim 24
Dependent Claim
162 words
A staple driving tool comprising a body, a load coil in said body, an axial armature disposed in said body for movement by said coil when the coil is energized, said armature comprising a lower portion slidably received in said coil, and a top portion extending above said coil, an upper guide means on the body having a hole to slidably receive said top armature portion and means on the body having a hole constituting lower guide means for said lower armature portion, staple driving means fixed to said armature between the upper guide means and lower guide means, a staple magazine at the lower end of said body, a trigger switch on said body, and circuit means including said coil and switch to automatically energize said coil upon actuating said switch, and safety switch means in said circuit to prevent energizing of the coil unless the lower front end of the tool is on a work piece in position for stapling.
Claim 25
Dependent Claim
26 words
The combination of claim 18, said staple driving means comprised a substantially flat blade and an attaching member mounted to said blade and to said armature.
Claim 26
Dependent Claim
20 words
The combination of claim 19, said attaching member being horizontally disposed and spaced between said upper and lower guide means.
Claim 27
Dependent Claim
31 words
The combination of claim 18, a cup receiving said load coil, said cup comprising a bottom wall from which a cylindrical wall extends upwardly, said coil being housed in said cup.
Claim 28
Dependent Claim
29 words
The combination of claim 21, and means at the bottom of said cup to guide said drive blade for vertical movement with said armature in parallel spaced relation thereto.
Claim 29
Dependent Claim
36 words
The combination of claim 22, said drive blade guide means comprising a plate fixed to the bottom of said cup and said staple drive blade guide means being located at the forward end of said plate.
Claim 30
Dependent Claim
48 words
The combination of claim 16 wherein said armature has an upper portion of lesser diameter than said lower end thereof, and said coil means comprises lower guide means to guide said lower end of said armature and said upper guide means guides said upper portion of said armature.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |