US 5,860,371 AGranted

Security window adapted to prevent forced entry

AssigneeProtec Co., Ltd.

InventorMichael K. Shelley

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Abstract

A security window having one or more vertically movable panels, suitably of a transparent, rigid plastic that is bullet-resistant. The security window is useful for a clerk in a convenience store. The security window is provided with a safety mechanism that is operatively associated with the one or more vertically movable panels, and prevents direct vertical manual movement thereof by a would-be robber.

Claims24

Dependent claims

A security window comprising:

(a) a frame having a roof member, a first side member, and a second side member;
(b) a vertically extending panel fixedly mounted adjacent to the roof member, and the fixed panel having a top edge, a bottom edge, a first side edge, and a second side edge;
(c) a vertically extending movable panel assemblage comprising at least one movable panel slidably mounted in the frame and adapted to be vertically moved between an upper open position in superposed registration with the fixed panel and a lower closed position vertically below the fixed panel, and the at least one movable panel having a top edge, a bottom edge, a first side edge, and a second side edge;
(d) a counterbalance for the movable panel assemblage including a primary counterweight assemblage comprising a first and a second equally sized counterweight vertically disposed, respectively, in each of the first and the second side members of the frame;
(e) a mounting mechanism operatively associated with the frame to permit vertical movement of the at least one movable panel in a path that defines a plane substantially parallel to the plane defined by the fixed panel, wherein the mounting mechanism includes:
(i) a first shaft, having a first end and a second end, and the first shaft being operatively associated with the at least one movable panel and being supported for rotational movement adjacent the roof member of the frame;
(ii) a first and a second sprocket disposed, respectively, at the first end and the second end of the first shaft;
and
(iii) a first and a second chain connected, respectively, to the first and the second side edges of the at least one movable panel, and connected to the primary counterweight assemblage, and wound, respectively, over the first and the second sprockets;
(f) an activator operatively associated with the movable panel assemblage, such that engagement of the activator with the mounting mechanism allows for vertical movement of the at least one movable panel;
and
(g) a safety mechanism operatively associated with the movable panel assemblage and adapted to prevent direct vertical manual movement of the at least one movable panel, wherein the safety mechanism includes a first and a second arcuate-shaped block respectively disposed in each of the first and the second side members, with the first and the second blocks being respectively positioned above each of the first and the second sprockets to prevent each of the first and the second chains from being lifted off its associated sprocket during attempted direct vertical manual movement of the at least one movable panel.

9 more elements

Dependencies are inferred from the claim text.

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Abstract

A security window comprising:

(a) a frame having a roof member, a first side member, and a second side member;
(b) a vertically extending panel fixedly mounted adjacent to the roof member, and the fixed panel having a top edge, a bottom edge, a first side edge, and a second side edge;
(c) a vertically extending movable panel assemblage comprising at least one movable panel slidably mounted in the frame and adapted to be vertically moved between an upper open position in superposed registration with the fixed panel and a lower closed position vertically below the fixed panel, and the at least one movable panel having a top edge, a bottom edge, a first side edge, and a second side edge;
(d) a counterbalance for the movable panel assemblage including a primary counterweight assemblage comprising a first and a second equally sized counterweight vertically disposed, respectively, in each of the first and the second side members of the frame;
(e) a mounting mechanism operatively associated with the frame to permit vertical movement of the at least one movable panel in a path that defines a plane substantially parallel to the plane defined by the fixed panel, wherein the mounting mechanism includes:
(i) a first shaft, having a first end and a second end, and the first shaft being operatively associated with the at least one movable panel and being supported for rotational movement adjacent the roof member of the frame;
(ii) a first and a second sprocket disposed, respectively, at the first end and the second end of the first shaft;
and
(iii) a first and a second chain connected, respectively, to the first and the second side edges of the at least one movable panel, and connected to the primary counterweight assemblage, and wound, respectively, over the first and the second sprockets;
(f) an activator operatively associated with the movable panel assemblage, such that engagement of the activator with the mounting mechanism allows for vertical movement of the at least one movable panel;
and
(g) a safety mechanism operatively associated with the movable panel assemblage and adapted to prevent direct vertical manual movement of the at least one movable panel, wherein the safety mechanism includes a first and a second arcuate-shaped block respectively disposed in each of the first and the second side members, with the first and the second blocks being respectively positioned above each of the first and the second sprockets to prevent each of the first and the second chains from being lifted off its associated sprocket during attempted direct vertical manual movement of the at least one movable panel.

9 more elements